<?xml version="1.0"?> 
    <!-- $id$ -->
    
    <!-- 
============================================================================================================
=                                  definition of all existing variables                                    =
=                                            DO NOT CHANGE                                                 =
============================================================================================================
    -->
   <field_definition level="1" prec="4" operation="average" enabled=".TRUE." default_value="1.e20" > <!-- time step automaticaly defined -->

    <!-- 
============================================================================================================
                                  Dynamical ocean model variables
============================================================================================================
    -->

      <!-- T grid -->
      
      <field_group id="grid_T" grid_ref="grid_T_2D" >
         <field id="e3t"          long_name="T-cell thickness"   standard_name="cell_thickness"   unit="m"   grid_ref="grid_T_3D"/>
         <field id="e3t_0"        long_name="Initial T-cell thickness"   standard_name="ref_cell_thickness"   unit="m"   grid_ref="grid_T_3D"/>

         <field id="toce"         long_name="Sea Water Potential Temperature"         standard_name="sea_water_potential_temperature"   unit="degree_C"     grid_ref="grid_T_3D"/>
         <field id="toce_e3t"     long_name="temperature * e3t"                                                     unit="degree_C*m"   grid_ref="grid_T_3D" > toce * e3t </field >
         <field id="soce"         long_name="Sea Water Salinity"            standard_name="sea_water_salinity"      unit="0.001"     grid_ref="grid_T_3D"/>
         <field id="soce_e3t"     long_name="salinity * e3t"                                                        unit="0.001*m"   grid_ref="grid_T_3D" > soce * e3t </field >

         <field id="sst"          long_name="sea surface temperature"             standard_name="sea_surface_temperature"             unit="degC"     />
         <field id="sst2"         long_name="square of sea surface temperature"   standard_name="square_of_sea_surface_temperature"   unit="degC2"     > sst * sst </field >
         <field id="sstmax"       long_name="max of sea surface temperature"   field_ref="sst"   operation="maximum"                                  />
         <field id="sstmin"       long_name="min of sea surface temperature"   field_ref="sst"   operation="minimum"                                  />
         <field id="sstgrad"      long_name="module of sst gradient"                                                                  unit="degree_C/m"   />
         <field id="sstgrad2"     long_name="square of module of sst gradient"                                                        unit="degree_C2/m2" />
         <field id="sbt"          long_name="sea bottom temperature"                                                                  unit="degree_C"     />
         <field id="tosmint"      long_name="vertical integral of temperature times density"   standard_name="integral_wrt_depth_of_product_of_density_and_potential_temperature"  unit="(kg m2) degree_C" />

         <field id="sss"          long_name="sea surface salinity"             standard_name="sea_surface_salinity"   unit="1e-3" />
         <field id="sss2"         long_name="square of sea surface salinity"                                          unit="1e-6"  > sss * sss </field >
         <field id="sssmax"       long_name="max of sea surface salinity"   field_ref="sss"   operation="maximum"                 />
         <field id="sssmin"       long_name="min of sea surface salinity"   field_ref="sss"   operation="minimum"                 />
         <field id="sbs"          long_name="sea bottom salinity"                                                     unit="0.001" />
         <field id="somint"       long_name="vertical integral of salinity times density"   standard_name="integral_wrt_depth_of_product_of_density_and_salinity"  unit="(kg m2) x (1e-3)" /> 

         <field id="taubot"       long_name="bottom stress module"                                                    unit="N/m2" /> 

         <field id="ssh"          long_name="sea surface height"             standard_name="sea_surface_height_above_geoid"             unit="m" />
         <field id="ssh2"         long_name="square of sea surface height"   standard_name="square_of_sea_surface_height_above_geoid"   unit="m2" > ssh * ssh </field >
         <field id="sshmax"       long_name="max of sea surface height"   field_ref="ssh"   operation="maximum"                                  />

         <field id="mldkz5"       long_name="Turbocline depth (Kz = 5e-4)"                       standard_name="ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity"                unit="m"          />
         <field id="mldr10_1"     long_name="Mixed Layer Depth (dsigma = 0.01 wrt 10m)"          standard_name="ocean_mixed_layer_thickness_defined_by_sigma_theta"                                unit="m"          />
         <field id="mldr10_1max"  long_name="Max of Mixed Layer Depth (dsigma = 0.01 wrt 10m)"   field_ref="mldr10_1"   operation="maximum"                                                                          />
         <field id="mldr10_1min"  long_name="Min of Mixed Layer Depth (dsigma = 0.01 wrt 10m)"   field_ref="mldr10_1"   operation="minimum"                                                                          />
         <field id="heatc"        long_name="Heat content vertically integrated"                 standard_name="integral_of_sea_water_potential_temperature_wrt_depth_expressed_as_heat_content"   unit="J/m2"       />
         <field id="saltc"        long_name="Salt content vertically integrated"                                                                                                                   unit="1e-3*kg/m2" />

         <!-- EOS -->
         <field id="alpha"        long_name="thermal expansion"                                                         unit="degC-1" grid_ref="grid_T_3D" />
         <field id="beta"         long_name="haline contraction"                                                        unit="1e3"    grid_ref="grid_T_3D" />
         <field id="rhop"         long_name="potential density (sigma0)"        standard_name="sea_water_sigma_theta"   unit="kg/m3"  grid_ref="grid_T_3D" />

         <!-- Energy - horizontal divergence -->
         <field id="eken"         long_name="kinetic energy"          standard_name="specific_kinetic_energy_of_sea_water"   unit="m2/s2"  grid_ref="grid_T_3D" />
         <field id="hdiv"         long_name="horizontal divergence"                                                          unit="s-1"    grid_ref="grid_T_3D" />

         <!-- variables available with MLE -->
         <field id="Lf_NHpf"      long_name="MLE: Lf = N H / f"   unit="m" />

         <!-- next variables available with key_diahth -->
         <field id="mlddzt"       long_name="Thermocline Depth (depth of max dT/dz)"         standard_name="depth_at_maximum_upward_derivative_of_sea_water_potential_temperature"             unit="m"                         />
         <field id="mldr10_3"     long_name="Mixed Layer Depth (dsigma = 0.03 wrt 10m)"      standard_name="ocean_mixed_layer_thickness_defined_by_sigma_theta"                                unit="m"                         />
         <field id="mldr0_1"      long_name="Mixed Layer Depth (dsigma = 0.01 wrt sfc)"      standard_name="ocean_mixed_layer_thickness_defined_by_sigma_theta"                                unit="m"                         />
         <field id="mldr0_3"      long_name="Mixed Layer Depth (dsigma = 0.03 wrt sfc)"      standard_name="ocean_mixed_layer_thickness_defined_by_sigma_theta"                                unit="m"                         />
         <field id="mld_dt02"     long_name="Mixed Layer Depth (|dT| = 0.2 wrt 10m)"         standard_name="ocean_mixed_layer_thickness_defined_by_temperature"                                unit="m"                         />
         <field id="topthdep"     long_name="Top of Thermocline Depth (dT = -0.2 wrt 10m)"   standard_name="ocean_mixed_layer_thickness_defined_by_temperature"                                unit="m"                         />
         <field id="pycndep"      long_name="Pycnocline Depth (dsigma[dT=-0.2] wrt 10m)"     standard_name="ocean_mixed_layer_thickness_defined_by_sigma_theta"                                unit="m"                         />
         <field id="BLT"          long_name="Barrier Layer Thickness"                                                                                                                          unit="m"                          > topthdep - pycndep </field>
         <field id="tinv"         long_name="Max of vertical invertion of temperature"                                                                                                         unit="degC"                      />
         <field id="depti"        long_name="Depth of max. vert. inv. of temperature"                                                                                                          unit="m"                         />
         <field id="20d"          long_name="Depth of 20C isotherm"                          standard_name="depth_of_isosurface_of_sea_water_potential_temperature"                            unit="m"   />
         <field id="28d"          long_name="Depth of 28C isotherm"                          standard_name="depth_of_isosurface_of_sea_water_potential_temperature"                            unit="m"   />
         <field id="hc300"        long_name="Heat content 0-300m"                            standard_name="integral_of_sea_water_potential_temperature_wrt_depth_expressed_as_heat_content"   unit="J/m2"                      />

         <!-- variables available with key_diaar5 -->
         <field id="botpres"      long_name="Sea Water Pressure at Sea Floor"   standard_name="sea_water_pressure_at_sea_floor"   unit="dbar" />
         <field id="sshdyn"       long_name="dynamic sea surface height"     standard_name="dynamic_sea_surface_height_above_geoid"     unit="m" />
         <field id="sshdyn2"      long_name="square of dynamic sea surface height"     standard_name="dynamic_sea_surface_height_above_geoid_squared"     unit="m2" > sshdyn * sshdyn </field>
         <field id="tnpeo"      long_name="Tendency of ocean potential energy content"          unit="W/m2"                           />

         <!-- variables available with key_vvl -->
         <field id="tpt_dep"      long_name="T-point depth"                  standard_name="depth_below_geoid"   unit="m"   grid_ref="grid_T_3D" />
         <field id="e3tdef"       long_name="T-cell thickness deformation"                                       unit="%"   grid_ref="grid_T_3D" />
      </field_group>

      <!-- Tides -->

      <field_group id="Tides_T" grid_ref="grid_T_2D" operation="once" >
         <!-- tidal composante -->
         <field id="M2x"          long_name="M2 Elevation harmonic real part "                             unit="m"        />
         <field id="M2y"          long_name="M2 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="S2x"          long_name="S2 Elevation harmonic real part "                             unit="m"        />
         <field id="S2y"          long_name="S2 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="N2x"          long_name="N2 Elevation harmonic real part "                             unit="m"        />
         <field id="N2y"          long_name="N2 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="K1x"          long_name="K1 Elevation harmonic real part "                             unit="m"        />
         <field id="K1y"          long_name="K1 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="O1x"          long_name="O1 Elevation harmonic real part "                             unit="m"        />
         <field id="O1y"          long_name="O1 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="Q1x"          long_name="Q1 Elevation harmonic real part "                             unit="m"        />
         <field id="Q1y"          long_name="Q1 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="M4x"          long_name="M4 Elevation harmonic real part "                             unit="m"        />
         <field id="M4y"          long_name="M4 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="K2x"          long_name="K2 Elevation harmonic real part "                             unit="m"        />
         <field id="K2y"          long_name="K2 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="P1x"          long_name="P1 Elevation harmonic real part "                             unit="m"        />
         <field id="P1y"          long_name="P1 Elevation harmonic imaginary part"                         unit="m"        />
         <field id="Mfx"          long_name="Mf Elevation harmonic real part "                             unit="m"        />
         <field id="Mfy"          long_name="Mf Elevation harmonic imaginary part"                         unit="m"        />
         <field id="Mmx"          long_name="Mm Elevation harmonic real part "                             unit="m"        />
         <field id="Mmy"          long_name="Mm Elevation harmonic imaginary part"                         unit="m"        />
      </field_group>
	 
      <field_group id="Tides_U" grid_ref="grid_U_2D" operation="once" >
         <field id="M2x_u"        long_name="M2 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="M2y_u"        long_name="M2 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="S2x_u"        long_name="S2 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="S2y_u"        long_name="S2 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="N2x_u"        long_name="N2 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="N2y_u"        long_name="N2 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="K1x_u"        long_name="K1 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="K1y_u"        long_name="K1 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="O1x_u"        long_name="O1 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="O1y_u"        long_name="O1 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Q1x_u"        long_name="Q1 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="Q1y_u"        long_name="Q1 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="M4x_u"        long_name="M4 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="M4y_u"        long_name="M4 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="K2x_u"        long_name="K2 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="K2y_u"        long_name="K2 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="P1x_u"        long_name="P1 current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="P1y_u"        long_name="P1 current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Mfx_u"        long_name="Mf current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="Mfy_u"        long_name="Mf current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Mmx_u"        long_name="Mm current barotrope along i-axis harmonic real part "        unit="m/s"      />
         <field id="Mmy_u"        long_name="Mm current barotrope along i-axis harmonic imaginary part "   unit="m/s"      />
      </field_group>
	 
      <field_group id="Tides_V" grid_ref="grid_V_2D" operation="once" >
         <field id="M2x_v"        long_name="M2 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="M2y_v"        long_name="M2 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="S2x_v"        long_name="S2 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="S2y_v"        long_name="S2 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="N2x_v"        long_name="N2 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="N2y_v"        long_name="N2 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="K1x_v"        long_name="K1 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="K1y_v"        long_name="K1 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="O1x_v"        long_name="O1 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="O1y_v"        long_name="O1 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Q1x_v"        long_name="Q1 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="Q1y_v"        long_name="Q1 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="M4x_v"        long_name="M4 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="M4y_v"        long_name="M4 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="K2x_v"        long_name="K2 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="K2y_v"        long_name="K2 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="P1x_v"        long_name="P1 current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="P1y_v"        long_name="P1 current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Mfx_v"        long_name="Mf current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="Mfy_v"        long_name="Mf current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />
         <field id="Mmx_v"        long_name="Mm current barotrope along j-axis harmonic real part "        unit="m/s"      />
         <field id="Mmy_v"        long_name="Mm current barotrope along j-axis harmonic imaginary part "   unit="m/s"      />	 
      </field_group>

      <!-- SBC -->
      
      <field_group id="SBC" grid_ref="grid_T_2D" > <!-- time step automaticaly defined based on nn_fsbc -->
         <field id="empmr"        long_name="Net Upward Water Flux"                standard_name="water_flux_out_of_sea_ice_and_sea_water"                              unit="kg/m2/s"   />
         <field id="empbmr"       long_name="Net Upward Water Flux at pre. tstep"  standard_name="water_flux_out_of_sea_ice_and_sea_water"                              unit="kg/m2/s"   />
         <field id="emp_oce"      long_name="Evap minus Precip over ocean"         standard_name="evap_minus_precip_over_sea_water"                                     unit="kg/m2/s"   />
         <field id="emp_ice"      long_name="Evap minus Precip over ice"           standard_name="evap_minus_precip_over_sea_ice"                                       unit="kg/m2/s"   />
         <field id="saltflx"      long_name="Downward salt flux"                                                                                                        unit="1e-3/m2/s" />
         <field id="fmmflx"       long_name="Water flux due to freezing/melting"                                                                                        unit="kg/m2/s"   />
         <field id="snowpre"      long_name="Snow precipitation"                   standard_name="snowfall_flux"                                                        unit="kg/m2/s"   />
         <field id="runoffs"      long_name="River Runoffs"                        standard_name="water_flux_into_sea_water_from_rivers"                                unit="kg/m2/s"   />
         <field id="precip"       long_name="Total precipitation"                  standard_name="precipitation_flux"                                                   unit="kg/m2/s"   />
 
         <field id="qt"           long_name="Net Downward Heat Flux"                standard_name="surface_downward_heat_flux_in_sea_water"                              unit="W/m2"                           />
         <field id="qns"          long_name="non solar Downward Heat Flux"                                                                                               unit="W/m2"                           />
         <field id="qsr"          long_name="Shortwave Radiation"                   standard_name="net_downward_shortwave_flux_at_sea_water_surface"                     unit="W/m2"                           />
         <field id="qsr3d"        long_name="Shortwave Radiation 3D distribution"   standard_name="downwelling_shortwave_flux_in_sea_water"                              unit="W/m2"      grid_ref="grid_T_3D" />
         <field id="qrp"          long_name="Surface Heat Flux: Damping"            standard_name="heat_flux_into_sea_water_due_to_newtonian_relaxation"                 unit="W/m2"                           />
         <field id="erp"          long_name="Surface Water Flux: Damping"           standard_name="water_flux_out_of_sea_water_due_to_newtonian_relaxation"              unit="kg/m2/s"                        />
         <field id="taum"         long_name="wind stress module"                    standard_name="magnitude_of_surface_downward_stress"                                 unit="N/m2"                           />
         <field id="wspd"         long_name="wind speed module"                     standard_name="wind_speed"                                                           unit="m/s"                            />
         
         <!-- * variable relative to atmospheric pressure forcing : available with ln_apr_dyn -->
         <field id="ssh_ib"       long_name="Inverse barometer sea surface height"  standard_name="sea_surface_height_correction_due_to_air_pressure_at_low_frequency"   unit="m"        />

         <!-- * variable related to ice shelf forcing * -->
         <field id="fwfisf"       long_name="Ice shelf melting"                             unit="kg/m2/s"  />
         <field id="fwfisf3d"     long_name="Ice shelf melting"                             unit="kg/m2/s"  grid_ref="grid_T_3D" />
         <field id="qlatisf"      long_name="Ice shelf latent heat flux"                    unit="W/m2"     />
         <field id="qlatisf3d"    long_name="Ice shelf latent heat flux"                    unit="W/m2"     grid_ref="grid_T_3D" />
         <field id="qhcisf"       long_name="Ice shelf heat content flux"                   unit="W/m2"     />
         <field id="qhcisf3d"     long_name="Ice shelf heat content flux"                   unit="W/m2"     grid_ref="grid_T_3D" />
         <field id="isfgammat"    long_name="transfert coefficient for isf (temperature)"   unit="m/s"      />
         <field id="isfgammas"    long_name="transfert coefficient for isf (salinity)"      unit="m/s"      />
         <field id="stbl"         long_name="salinity in the Losh tbl"                      unit="1e-3"     />
         <field id="ttbl"         long_name="temperature in the Losh tbl"                   unit="degC"     />

         <!-- *_oce variables available with ln_blk_clio or ln_blk_core -->
         <field id="qlw_oce"      long_name="Longwave Downward Heat Flux over open ocean"  standard_name="surface_net_downward_longwave_flux"   unit="W/m2"  />
         <field id="qsb_oce"      long_name="Sensible Downward Heat Flux over open ocean"  standard_name="surface_downward_sensible_heat_flux"  unit="W/m2"  />
         <field id="qla_oce"      long_name="Latent Downward Heat Flux over open ocean"    standard_name="surface_downward_latent_heat_flux"    unit="W/m2"  />
         <field id="qemp_oce"     long_name="Downward Heat Flux from E-P over open ocean"                                                       unit="W/m2"  />
         <field id="taum_oce"     long_name="wind stress module over open ocean"           standard_name="magnitude_of_surface_downward_stress" unit="N/m2"  />

         <!-- available key_oasis3 -->
         <field id="snow_ao_cea"  long_name="Snow over ice-free ocean (cell average)"   standard_name="snowfall_flux"                             unit="kg/m2/s"  />
         <field id="snow_ai_cea"  long_name="Snow over sea-ice (cell average)"          standard_name="snowfall_flux"                             unit="kg/m2/s"  />
         <field id="subl_ai_cea"  long_name="Sublimation over sea-ice (cell average)"   standard_name="surface_snow_and_ice_sublimation_flux"     unit="kg/m2/s"  />
         <field id="icealb_cea"   long_name="Ice albedo (cell average)"                 standard_name="sea_ice_albedo"                            unit="1"        />
         <field id="calving_cea"  long_name="Calving"                                   standard_name="water_flux_into_sea_water_from_icebergs"   unit="kg/m2/s"  />
         <field id="iceberg_cea"  long_name="Iceberg"                                   standard_name="water_flux_into_sea_water_from_icebergs"   unit="kg/m2/s"  />
         <field id="iceshelf_cea" long_name="Iceshelf"                                  standard_name="water_flux_into_sea_water_from_iceshelf"   unit="kg/m2/s"  />

         <!-- available if key_oasis3 + conservative method -->
         <field id="rain"          long_name="Liquid precipitation"                                     standard_name="rainfall_flux"                                                                 unit="kg/m2/s"  />
         <field id="rain_ao_cea"   long_name="Liquid precipitation over ice-free ocean (cell average)"  standard_name="rainfall_flux"                                                                 unit="kg/m2/s"  />
         <field id="evap_ao_cea"   long_name="Evaporation over ice-free ocean (cell average)"           standard_name="water_evaporation_flux"                                                        unit="kg/m2/s"  />
         <field id="isnwmlt_cea"   long_name="Snow over Ice melting (cell average)"                     standard_name="surface_snow_melt_flux"                                                        unit="kg/m2/s"  />
         <field id="fsal_virt_cea" long_name="Virtual salt flux due to ice formation (cell average)"    standard_name="virtual_salt_flux_into_sea_water_due_to_sea_ice_thermodynamics"                unit="kg/m2/s"  />
         <field id="fsal_real_cea" long_name="Real salt flux due to ice formation (cell average)"       standard_name="downward_sea_ice_basal_salt_flux"                                              unit="kg/m2/s"  />
         <field id="hflx_rain_cea" long_name="heat flux due to rainfall"                                standard_name="temperature_flux_due_to_rainfall_expressed_as_heat_flux_into_sea_water"        unit="W/m2"     />
         <field id="hflx_prec_cea" long_name="heat flux due to precipitation"                           standard_name="temperature_flux_due_to_precipitation_expressed_as_heat_flux_into_sea_water"        unit="W/m2"     />
         <field id="hflx_evap_cea" long_name="heat flux due to evaporation"                             standard_name="temperature_flux_due_to_evaporation_expressed_as_heat_flux_out_of_sea_water"   unit="W/m2"     />
         <field id="hflx_snow_cea" long_name="heat flux due to snow falling"                            standard_name="heat_flux_onto_ocean_and_ice_due_to_snow_thermodynamics"                       unit="W/m2"     />
         <field id="hflxs_snow_cea" long_name="heat flux due to snow falling (sensible heat only)"                            standard_name="sensible_heat_flux_onto_ocean_and_ice_due_to_snow_thermodynamics"                       unit="W/m2"     />
         <field id="hflx_snow_ai_cea" long_name="heat flux due to snow falling over ice"                standard_name="heat_flux_onto_ice_due_to_snow_thermodynamics"                                 unit="W/m2"     />
         <field id="hflx_snow_ao_cea" long_name="heat flux due to snow falling over ice-free ocean"     standard_name="heat_flux_onto_sea_water_due_to_snow_thermodynamics"                           unit="W/m2"     />
         <field id="hflx_ice_cea"  long_name="heat flux due to ice thermodynamics"                      standard_name="heat_flux_into_sea_water_due_to_sea_ice_thermodynamics"                        unit="W/m2"     />
         <field id="hflx_rnf_cea"  long_name="heat flux due to runoffs"                                 standard_name="temperature_flux_due_to_runoff_expressed_as_heat_flux_into_sea_water"          unit="W/m2"     />
         <field id="hflx_cal_cea"  long_name="heat flux due to calving"                                 standard_name="heat_flux_into_sea_water_due_to_iceberg_thermodynamics"                        unit="W/m2"     />
         <field id="bicemel_cea"   long_name="Rate of Melt at Sea Ice Base (cell average)"              standard_name="tendency_of_sea_ice_amount_due_to_basal_melting"                               unit="kg/m2/s"  />
         <field id="licepro_cea"   long_name="Lateral Sea Ice Growth Rate (cell average)"               standard_name="tendency_of_sea_ice_amount_due_to_lateral_growth_of_ice_floes"                 unit="kg/m2/s"  />
         <field id="snowmel_cea"   long_name="Snow Melt Rate (cell average)"                            standard_name="surface_snow_melt_flux"                                                        unit="kg/m2/s"  />
         <field id="sntoice_cea"   long_name="Snow-Ice Formation Rate (cell average)"                   standard_name="tendency_of_sea_ice_amount_due_to_snow_conversion"                             unit="kg/m2/s"  />
         <field id="ticemel_cea"   long_name="Rate of Melt at Upper Surface of Sea Ice (cell average)"  standard_name="tendency_of_sea_ice_amount_due_to_surface_melting"                             unit="kg/m2/s"  />

         <field id="rnf_x_sst"    long_name="Runoff term on SST"                                                                                                              unit="kg*degC/m2/s" />
         <field id="rnf_x_sss"    long_name="Runoff term on SSS"                                                                                                              unit="kg*1e-3/m2/s" />
       
	 <!-- sbcssm variables -->
         <field id="sst_m"    unit="degC" />
         <field id="sss_m"    unit="psu"  />
         <field id="ssu_m"    unit="m/s"  />
         <field id="ssv_m"    unit="m/s"  />
         <field id="ssh_m"    unit="m"    />
         <field id="e3t_m"    unit="m"    />
         <field id="frq_m"    unit="-"    />

      </field_group>

      <!-- U grid -->
      
      <field_group id="grid_U"   grid_ref="grid_U_2D">
         <field id="e3u"          long_name="U-cell thickness"                                       standard_name="cell_thickness"              unit="m"          grid_ref="grid_U_3D" />
         <field id="e3u_0"        long_name="Initial U-cell thickness"                               standard_name="ref_cell_thickness"          unit="m"          grid_ref="grid_U_3D"/>
         <field id="utau"         long_name="Wind Stress along i-axis"                               standard_name="surface_downward_x_stress"   unit="N/m2"                            />
         <field id="uoce"         long_name="ocean current along i-axis"                             standard_name="sea_water_x_velocity"        unit="m/s"        grid_ref="grid_U_3D" />
         <field id="uoce_e3u"     long_name="ocean current along i-axis * e3u"                                                                   unit="m2/s"       grid_ref="grid_U_3D"  > uoce * e3u </field>
         <field id="ssu"          long_name="ocean surface current along i-axis"                                                                 unit="m/s"                             />
         <field id="sbu"          long_name="ocean bottom current along i-axis"                                                                  unit="m/s"                             />
         <field id="ubar"         long_name="ocean barotropic current along i-axis"                                                              unit="m/s"                             />
         <field id="uocetr_eff"   long_name="Effective ocean transport along i-axis"                 standard_name="ocean_volume_x_transport"    unit="m3/s"       grid_ref="grid_U_3D" />
         <field id="uocet"        long_name="ocean transport along i-axis times temperature (CRS)"                                               unit="degC*m/s"   grid_ref="grid_U_3D" />
         <field id="uoces"        long_name="ocean transport along i-axis times salinity (CRS)"                                                  unit="1e-3*m/s"   grid_ref="grid_U_3D" />

         <!-- variables available with MLE -->
         <field id="psiu_mle"     long_name="MLE streamfunction along i-axis"   unit="m3/s"   grid_ref="grid_U_3D" />

         <!-- uoce_eiv: available with key_traldf_eiv and key_diaeiv -->
         <field id="uoce_eiv"      long_name="EIV ocean current along i-axis"   standard_name="bolus_sea_water_x_velocity"   unit="m/s"   grid_ref="grid_U_3D" />
         <field id="ueiv_masstr"   long_name="EIV Ocean Mass X Transport"    standard_name="bolus_ocean_mass_x_transport"                          unit="kg/s"        grid_ref="grid_U_3D" />
         <field id="ueiv_heattr3d" long_name="ocean bolus heat transport along i-axis"    standard_name="ocean_heat_x_transport_due_to_bolus_advection"   unit="W"    grid_ref="grid_U_3D" />
         <field id="ueiv_salttr3d" long_name="ocean bolus salt transport along i-axis"    standard_name="ocean_salt_x_transport_due_to_bolus_advection"   unit="kg"   grid_ref="grid_U_3D" />

         <!-- uoce_eiv: available with key_trabbl -->
         <field id="uoce_bbl"     long_name="BBL ocean current along i-axis"    unit="m/s"  />
         <field id="ahu_bbl"      long_name="BBL diffusive flux along i-axis"   unit="m3/s" />

         <!-- variable for ice shelves -->
         <field id="utbl"         long_name="zonal current in the Losh tbl"     unit="m/s" />

         <!-- variables available with key_diaar5 -->
         <field id="u_masstr"     long_name="ocean eulerian mass transport along i-axis"    standard_name="ocean_mass_x_transport"                          unit="kg/s"        grid_ref="grid_U_3D" />
         <field id="u_masstr_vint" long_name="vertical integral of ocean eulerian mass transport along i-axis"    standard_name="vertical_integral_of_ocean_mass_x_transport"  unit="kg/s" />
         <field id="u_heattr"     long_name="ocean eulerian heat transport along i-axis"    standard_name="ocean_heat_x_transport"                          unit="W"                                />
         <field id="uadv_heattr"  long_name="ocean advective heat transport along i-axis"    standard_name="advectice_ocean_heat_x_transport"                          unit="W"                                />
         <field id="u_salttr"     long_name="ocean eulerian salt transport along i-axis"    standard_name="ocean_salt_x_transport"                          unit="0.001*kg/s"                        />
         <field id="ueiv_heattr"  long_name="ocean bolus heat transport along i-axis"       standard_name="ocean_heat_x_transport_due_to_bolus_advection"   unit="W"                                />
         <field id="ueiv_salttr"  long_name="ocean bolus salt transport along i-axis"       standard_name="ocean_salt_x_transport_due_to_bolus_advection"   unit="W"                                />
         <field id="udiff_heattr" long_name="ocean diffusion heat transport along i-axis"   standard_name="ocean_heat_x_transport_due_to_diffusion"         unit="W"                                />
      </field_group>
      
      <!-- V grid -->
      
      <field_group id="grid_V"   grid_ref="grid_V_2D">
         <field id="e3v"          long_name="V-cell thickness"                                       standard_name="cell_thickness"              unit="m"          grid_ref="grid_V_3D" />
         <field id="e3v_0"        long_name="Initial V-cell thickness"                               standard_name="ref_cell_thickness"          unit="m"          grid_ref="grid_V_3D"/>
         <field id="vtau"         long_name="Wind Stress along j-axis"                               standard_name="surface_downward_y_stress"   unit="N/m2"                            />
         <field id="voce"         long_name="ocean current along j-axis"                             standard_name="sea_water_y_velocity"        unit="m/s"        grid_ref="grid_V_3D" />
         <field id="voce_e3v"     long_name="ocean current along j-axis * e3v"                                                                   unit="m2/s"       grid_ref="grid_V_3D"  > voce * e3v </field>
         <field id="ssv"          long_name="ocean surface current along j-axis"                                                                 unit="m/s"                             />
         <field id="sbv"          long_name="ocean bottom current along j-axis"                                                                  unit="m/s"                             />
         <field id="vbar"         long_name="ocean barotropic current along j-axis"                                                              unit="m/s"                             />
         <field id="vocetr_eff"   long_name="Effective ocean transport along j-axis"                 standard_name="ocean_volume_y_transport"    unit="m3/s"       grid_ref="grid_V_3D" />
         <field id="vocet"        long_name="ocean transport along j-axis times temperature (CRS)"                                               unit="degC*m/s"   grid_ref="grid_V_3D" />
         <field id="voces"        long_name="ocean transport along j-axis times salinity (CRS)"                                                  unit="1e-3*m/s"   grid_ref="grid_V_3D" />

         <!-- variables available with MLE -->
         <field id="psiv_mle"     long_name="MLE streamfunction along j-axis"   unit="m3/s"   grid_ref="grid_V_3D" />

         <!-- voce_eiv: available with key_traldf_eiv and key_diaeiv -->
         <field id="voce_eiv"     long_name="EIV ocean current along j-axis"   standard_name="bolus_sea_water_y_velocity"   unit="m/s"   grid_ref="grid_V_3D" />
         <field id="veiv_masstr"   long_name="EIV Ocean Mass Y Transport"    standard_name="bolus_ocean_mass_y_transport"                          unit="kg/s"        grid_ref="grid_V_3D" />
         <field id="veiv_heattr3d" long_name="ocean bolus heat transport along j-axis"    standard_name="ocean_heat_y_transport_due_to_bolus_advection"   unit="W"    grid_ref="grid_V_3D" />
         <field id="veiv_salttr3d" long_name="ocean bolus salt transport along j-axis"    standard_name="ocean_salt_y_transport_due_to_bolus_advection"   unit="kg"   grid_ref="grid_V_3D" />

         <!-- voce_eiv: available with key_trabbl -->
         <field id="voce_bbl"     long_name="BBL ocean current along j-axis"    unit="m/s"  />
         <field id="ahv_bbl"      long_name="BBL diffusive flux along j-axis"   unit="m3/s" />

         <!-- variable for ice shelves -->
         <field id="vtbl"         long_name="meridional current in the Losh tbl"   unit="m/s" />

         <!-- variables available with key_diaar5 -->
         <field id="v_masstr"     long_name="Ocean eulerian mass transport along j-axis"    standard_name="ocean_mass_y_transport"                          unit="kg/s"        grid_ref="grid_V_3D" />
         <field id="v_heattr"     long_name="Ocean eulerian heat transport along j-axis"    standard_name="ocean_heat_y_transport"                          unit="W"                                />
         <field id="vadv_heattr"  long_name="ocean advective heat transport along j-axis"    standard_name="advective_ocean_heat_y_transport"                          unit="W"                                />
         <field id="v_salttr"     long_name="ocean eulerian salt transport along i-axis"    standard_name="ocean_salt_y_transport"                          unit="0.001*kg/s"                        />
         <field id="veiv_heattr"  long_name="ocean bolus heat transport along j-axis"       standard_name="ocean_heat_y_transport_due_to_bolus_advection"   unit="W"                                />
         <field id="veiv_salttr"  long_name="ocean bolus salt transport along j-axis"       standard_name="ocean_salt_y_transport_due_to_bolus_advection"   unit="W"                                />
         <field id="vdiff_heattr" long_name="ocean diffusion heat transport along j-axis"   standard_name="ocean_heat_y_transport_due_to_diffusion"         unit="W"                                />
      </field_group>
      
      <!-- W grid -->
      
      <field_group id="grid_W" grid_ref="grid_W_3D">
        <field id="e3w"          long_name="W-cell thickness"                     standard_name="cell_thickness"              unit="m"    />
        <field id="woce"         long_name="ocean vertical velocity"              standard_name="upward_sea_water_velocity"   unit="m/s"  />
        <field id="wocetr_eff"   long_name="effective ocean vertical transport"                                               unit="m3/s" />

        <!-- woce_eiv: available with key_traldf_eiv and key_diaeiv -->
        <field id="woce_eiv"     long_name="EIV ocean vertical velocity"   standard_name="bolus_upward_sea_water_velocity"   unit="m/s" />
        <field id="weiv_masstr"  long_name="EIV Upward Ocean Mass Transport"  standard_name="bolus_upward_ocean_mass_transport"             unit="kg/s"   />
        <field id="weiv_heattr3d" long_name="ocean bolus heat transport"    standard_name="ocean_heat_z_transport_due_to_bolus_advection"   unit="W"    grid_ref="grid_W_3D" />
        <field id="weiv_salttr3d" long_name="ocean bolus salt transport"    standard_name="ocean_salt_z_transport_due_to_bolus_advection"   unit="kg"   grid_ref="grid_W_3D" />

        <field id="avt"          long_name="vertical eddy diffusivity"   standard_name="ocean_vertical_heat_diffusivity"       unit="m2/s" />
        <field id="logavt"       long_name="logarithm of vertical eddy diffusivity"   standard_name="ocean_vertical_heat_diffusivity"       unit="m2/s" />
        <field id="avm"          long_name="vertical eddy viscosity"     standard_name="ocean_vertical_momentum_diffusivity"   unit="m2/s" />

        <!-- avs: available with key_zdfddm -->
        <field id="avs"          long_name="salt vertical eddy diffusivity"   standard_name="ocean_vertical_salt_diffusivity"   unit="m2/s" />
        <field id="logavs"       long_name="logarithm of salt vertical eddy diffusivity"   standard_name="ocean_vertical_heat_diffusivity"       unit="m2/s" />

        <!-- avt_evd and avm_evd: available with ln_zdfevd -->
        <field id="avt_evd"      long_name="convective enhancement to vertical diffusivity"   standard_name="ocean_vertical_tracer_diffusivity_due_to_convection"     unit="m2/s" />
        <field id="avm_evd"      long_name="convective enhancement to vertical viscosity"     standard_name="ocean_vertical_momentum_diffusivity_due_to_convection"   unit="m2/s" />

        <!-- avt_tide: available with key_zdftmx -->
        <field id="av_tide"      long_name="tidal vertical diffusivity"   standard_name="ocean_vertical_tracer_diffusivity_due_to_tides"   unit="m2/s" />

       <!-- variables available with key_zdftmx_new -->
        <field id="av_ratio"     long_name="S over T diffusivity ratio"            standard_name="salinity_over_temperature_diffusivity_ratio"                     unit="1"    />
        <field id="av_wave"      long_name="wave-induced vertical diffusivity"     standard_name="ocean_vertical_tracer_diffusivity_due_to_internal_waves"         unit="m2/s" />
        <field id="bn2"          long_name="squared Brunt-Vaisala frequency"       standard_name="squared_brunt_vaisala_frequency"                                 unit="s-1"  />
        <field id="bflx_tmx"     long_name="wave-induced buoyancy flux"            standard_name="buoyancy_flux_due_to_internal_waves"                             unit="W/kg" />
        <field id="pcmap_tmx"    long_name="power consumed by wave-driven mixing"  standard_name="vertically_integrated_power_consumption_by_wave_driven_mixing"   unit="W/m2"      grid_ref="grid_W_2D" />
        <field id="emix_tmx"     long_name="power density available for mixing"    standard_name="power_available_for_mixing_from_breaking_internal_waves"         unit="W/kg" />

        <!-- variables available with key_diaar5 -->   
        <field id="w_masstr"     long_name="vertical mass transport"             standard_name="upward_ocean_mass_transport"             unit="kg/s"   />
        <field id="w_masstr2"    long_name="square of vertical mass transport"   standard_name="square_of_upward_ocean_mass_transport"   unit="kg2/s2" />

        <!-- aht2d and  aht2d_eiv: available with key_traldf_eiv and key_traldf_c2d -->
        <field id="aht2d"        long_name="lateral eddy diffusivity"       standard_name="ocean_tracer_xy_laplacian_diffusivity"      unit="m2/s"   grid_ref="grid_W_2D" />
        <field id="aht2d_eiv"    long_name="EIV lateral eddy diffusivity"   standard_name="ocean_tracer_bolus_laplacian_diffusivity"   unit="m2/s"   grid_ref="grid_W_2D" />
      </field_group>

      <!-- product fields -->
      <field_group id="diaprod">
        <field id="ut"           long_name="product_of_sea_water_x_velocity_and_potential_temperature"      unit="degree_C m/s"      grid_ref="grid_U_3D"   />
        <field id="ut_e3u"       long_name="product_of_sea_water_x_velocity_and_potential_temperature * e3u"  unit="degree_C m2/s"   grid_ref="grid_U_3D" > ut * e3u </field >
        <field id="us"           long_name="product_of_sea_water_x_velocity_and_salinity"                   unit="PSU m/s"       grid_ref="grid_U_3D"   />
        <field id="us_e3u"       long_name="product_of_sea_water_x_velocity_and_salinity * e3u"             unit="PSU m2/s"      grid_ref="grid_U_3D" > us * e3u </field >
        <field id="urhop"        long_name="product_of_sea_water_x_velocity_and_potential_density"          unit="(kg/m3).(m/s)" grid_ref="grid_U_3D"   />
        <field id="urhop_e3u"    long_name="product_of_sea_water_x_velocity_and_potential_density * e3u"    unit="(kg/m3).(m2/s)"   grid_ref="grid_U_3D" > urhop * e3u </field >
        <field id="vt"           long_name="product_of_sea_water_y_velocity_and_potential_temperature"      unit="degree_C m/s"      grid_ref="grid_V_3D"   />
        <field id="vt_e3v"       long_name="product_of_sea_water_y_velocity_and_potential_temperature * e3v"  unit="degree_C m2/s"   grid_ref="grid_V_3D" > vt * e3v </field >
        <field id="vs"           long_name="product_of_sea_water_y_velocity_and_salinity"                   unit="PSU m/s"       grid_ref="grid_V_3D"   />
        <field id="vs_e3v"       long_name="product_of_sea_water_y_velocity_and_salinity * e3t"             unit="PSU m2/s"      grid_ref="grid_V_3D" > vs * e3v </field >
        <field id="vrhop"        long_name="product_of_sea_water_y_velocity_and_potential_density"          unit="(kg/m3).(m/s)" grid_ref="grid_V_3D"   />
        <field id="vrhop_e3v"    long_name="product_of_sea_water_y_velocity_and_potential_density * e3t"    unit="(kg/m3).(m2/s)"  grid_ref="grid_V_3D" > vrhop * e3v </field >
        <field id="wt"           long_name="product_of_upward_sea_water_velocity_and_potential_temperature" unit="degree_C m/s"      grid_ref="grid_W_3D"   />
        <field id="ws"           long_name="product_of_upward_sea_water_velocity_and_salinity"              unit="PSU m/s"       grid_ref="grid_W_3D"   />
        <field id="wrhop"        long_name="product_of_upward_sea_water_velocity_and_potential_density"     unit="(kg/m3).(m/s)" grid_ref="grid_W_3D"   />
      </field_group>

      <!-- scalar variables available with key_diaar5 -->

      <field_group id="scalar"  grid_ref="grid_T_2D" >
         <field id="voltot"     long_name="global total volume"                          standard_name="sea_water_volume"                               unit="m3"   />
         <field id="sshtot"     long_name="global mean ssh"                              standard_name="global_average_sea_level_change"                unit="m"    />
         <field id="sshsteric"  long_name="global mean ssh steric"                       standard_name="global_average_steric_sea_level_change"         unit="m"    />
         <field id="sshthster"  long_name="global mean ssh thermosteric"                 standard_name="global_average_thermosteric_sea_level_change"   unit="m"    />
         <field id="masstot"    long_name="global total mass"                            standard_name="sea_water_mass"                                 unit="kg"   />
         <field id="temptot"    long_name="global mean temperature"                      standard_name="sea_water_potential_temperature"                unit="degC" />
         <field id="saltot"     long_name="global mean salinity"                         standard_name="sea_water_salinity"                             unit="1e-3" />
         <field id="fram_trans" long_name="Sea Ice Mass Transport Through Fram Strait"   standard_name="sea_ice_transport_across_line"                  unit="kg/s" />


      	 <!-- available with ln_diahsb -->
    	 <field id="bgtemper"     long_name="drift in global mean temperature wrt timestep 1"                 standard_name="change_over_time_in_sea_water_potential_temperature"   unit="degC"     />
    	 <field id="bgsaline"     long_name="drift in global mean salinity wrt timestep 1"                    standard_name="change_over_time_in_sea_water_practical_salinity"      unit="1e-3"     />
    	 <field id="bgheatco"     long_name="drift in global mean heat content wrt timestep 1"                                                                                      unit="1.e20J"   />
     	 <field id="bgheatfx"     long_name="drift in global mean heat flux    wrt timestep 1"                                                                                      unit="W/m2"     />
   	 <field id="bgsaltco"     long_name="drift in global mean salt content wrt timestep 1"                                                                                      unit="1e-3*km3" />
    	 <field id="bgvolssh"     long_name="drift in global mean ssh volume wrt timestep 1"                                                                                        unit="km3"      />
         <field id="bgvole3t"     long_name="drift in global mean volume variation (e3t) wrt timestep 1"                                                                            unit="km3"      />
    	 <field id="bgfrcvol"     long_name="global mean volume from forcing"                                                                                                       unit="km3"      />
    	 <field id="bgfrctem"     long_name="global mean heat content from forcing"                                                                                                 unit="1.e20J"   />
         <field id="bgfrchfx"     long_name="global mean heat flux from forcing"                                                                                                    unit="W/m2"     />
    	 <field id="bgfrcsal"     long_name="global mean salt content from forcing"                                                                                                 unit="1e-3*km3" />
    	 <field id="bgmistem"     long_name="global mean temperature error due to free surface (no vvl)"                                                                            unit="degC"     />
    	 <field id="bgmissal"     long_name="global mean salinity error due to free surface (no vvl)"                                                                               unit="1e-3"     />     

       </field_group>


  
      <!-- variables available with key_float -->

      <field_group id="floatvar" grid_ref="grid_T_nfloat" operation="instant" >
        <field id="traj_lon"      long_name="floats longitude"                                                           unit="degrees_east"  />
        <field id="traj_lat"      long_name="floats latitude"                                                            unit="degrees_north" />
        <field id="traj_dep"      long_name="floats depth"                                                               unit="m"             />
        <field id="traj_temp"     long_name="floats temperature"       standard_name="sea_water_potential_temperature"   unit="degC"          />
        <field id="traj_salt"     long_name="floats salinity"          standard_name="sea_water_practical_salinity"      unit="1e-3"          />
        <field id="traj_dens"     long_name="floats in-situ density"   standard_name="sea_water_density"                 unit="kg/m3"         />
        <field id="traj_group"    long_name="floats group"                                                               unit="1"             />
      </field_group>

      <!-- variables available with iceberg trajectories -->

      <field_group id="icbvar" domain_ref="grid_T"  > 
        <field id="berg_melt"          long_name="icb melt rate of icebergs"                       unit="kg/m2/s"                    />
        <field id="berg_buoy_melt"     long_name="icb buoyancy component of iceberg melt rate"     unit="kg/m2/s"                    />
        <field id="berg_eros_melt"     long_name="icb erosion component of iceberg melt rate"      unit="kg/m2/s"                    />
        <field id="berg_conv_melt"     long_name="icb convective component of iceberg melt rate"   unit="kg/m2/s"                    />
        <field id="berg_virtual_area"  long_name="icb virtual coverage by icebergs"                unit="m2"                         />
        <field id="bits_src"           long_name="icb mass source of bergy bits"                   unit="kg/m2/s"                    />
        <field id="bits_melt"          long_name="icb melt rate of bergy bits"                     unit="kg/m2/s"                    />
        <field id="bits_mass"          long_name="icb bergy bit density field"                     unit="kg/m2"                      />
        <field id="berg_mass"          long_name="icb iceberg density field"                       unit="kg/m2"                      />
        <field id="calving"            long_name="icb calving mass input"                          unit="kg/s"                       />
        <field id="berg_floating_melt" long_name="icb melt rate of icebergs + bits"                unit="kg/m2/s"                    />
        <field id="berg_real_calving"  long_name="icb calving into iceberg class"                  unit="kg/s"     axis_ref="icbcla" />
        <field id="berg_stored_ice"    long_name="icb accumulated ice mass by class"               unit="kg"       axis_ref="icbcla" />
      </field_group>

      <!-- Poleward transport : ptr -->     
      <field_group id="diaptr"> 
        <field id="zomsfglo"          long_name="Meridional Stream-Function: Global"                             unit="Sv"         grid_ref="grid_znl_W_3D" />
        <field id="zomsfatl"          long_name="Meridional Stream-Function: Atlantic"                           unit="Sv"         grid_ref="grid_znl_W_3D" />
        <field id="zomsfpac"          long_name="Meridional Stream-Function: Pacific"                            unit="Sv"         grid_ref="grid_znl_W_3D" />
        <field id="zomsfind"          long_name="Meridional Stream-Function: Indian"                             unit="Sv"         grid_ref="grid_znl_W_3D" />
        <field id="zomsfipc"          long_name="Meridional Stream-Function: Pacific+Indian"                     unit="Sv"         grid_ref="grid_znl_W_3D" />
        <field id="zotemglo"          long_name="Zonal Mean Temperature : Global"                                unit="degree_C"   grid_ref="grid_znl_T_3D" />
        <field id="zotematl"          long_name="Zonal Mean Temperature : Atlantic"                              unit="degree_C"   grid_ref="grid_znl_T_3D" />
        <field id="zotempac"          long_name="Zonal Mean Temperature : Pacific"                               unit="degree_C"   grid_ref="grid_znl_T_3D" />
        <field id="zotemind"          long_name="Zonal Mean Temperature : Indian"                                unit="degree_C"   grid_ref="grid_znl_T_3D" />
        <field id="zotemipc"          long_name="Zonal Mean Temperature : Pacific+Indian"                        unit="degree_C"   grid_ref="grid_znl_T_3D" />
        <field id="zosalglo"          long_name="Zonal Mean Salinity : Global"                                   unit="0.001"      grid_ref="grid_znl_T_3D" />
        <field id="zosalatl"          long_name="Zonal Mean Salinity : Atlantic"                                 unit="0.001"      grid_ref="grid_znl_T_3D" />
        <field id="zosalpac"          long_name="Zonal Mean Salinity : Pacific"                                  unit="0.001"      grid_ref="grid_znl_T_3D" />
        <field id="zosalind"          long_name="Zonal Mean Salinity : Indian"                                   unit="0.001"      grid_ref="grid_znl_T_3D" />
        <field id="zosalipc"          long_name="Zonal Mean Salinity : Pacific+Indian"                           unit="0.001"      grid_ref="grid_znl_T_3D" />
        <field id="zosrfglo"          long_name="Zonal Mean Surface"                                             unit="m2"         grid_ref="grid_znl_T_3D" />
        <field id="zosrfatl"          long_name="Zonal Mean Surface : Atlantic"                                  unit="m2"         grid_ref="grid_znl_T_3D" />
        <field id="zosrfpac"          long_name="Zonal Mean Surface : Pacific"                                   unit="m2"         grid_ref="grid_znl_T_3D" />
        <field id="zosrfind"          long_name="Zonal Mean Surface : Indian"                                    unit="m2"         grid_ref="grid_znl_T_3D" />
        <field id="zosrfipc"          long_name="Zonal Mean Surface : Pacific+Indian"                            unit="m2"         grid_ref="grid_znl_T_3D" />
        <field id="sophtadv"          long_name="Advective Heat Transport"                                       unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtadv_atl"      long_name="Advective Heat Transport: Atlantic"                             unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtadv_pac"      long_name="Advective Heat Transport: Pacific"                              unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtadv_ind"      long_name="Advective Heat Transport: Indian"                               unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtadv_ipc"      long_name="Advective Heat Transport: Pacific+Indian"                       unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtldf"          long_name="Diffusive Heat Transport"                                       unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtldf_atl"      long_name="Diffusive Heat Transport: Atlantic"                             unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtldf_pac"      long_name="Diffusive Heat Transport: Pacific"                              unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtldf_ind"      long_name="Diffusive Heat Transport: Indian"                               unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtldf_ipc"      long_name="Diffusive Heat Transport: Pacific+Indian"                       unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtove"          long_name="Overturning Heat Transport"                                     unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtove_atl"      long_name="Overturning Heat Transport: Atlantic"                           unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtove_pac"      long_name="Overturning Heat Transport: Pacific"                            unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtove_ind"      long_name="Overturning Heat Transport: Indian"                             unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtove_ipc"      long_name="Overturning Heat Transport: Pacific+Indian"                     unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtbtr"          long_name="Barotropic Heat Transport"                                      unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtbtr_atl"      long_name="Barotropic Heat Transport: Atlantic"                            unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtbtr_pac"      long_name="Barotropic Heat Transport: Pacific"                             unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtbtr_ind"      long_name="Barotropic Heat Transport: Indian"                              unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophtbtr_ipc"      long_name="Barotropic Heat Transport: Pacific+Indian"                      unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophteiv"          long_name="Heat Transport from mesoscale eddy advection"                   unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophteiv_atl"      long_name="Heat Transport from mesoscale eddy advection: Atlantic"         unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophteiv_pac"      long_name="Heat Transport from mesoscale eddy advection: Pacific"          unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophteiv_ind"      long_name="Heat Transport from mesoscale eddy advection: Indian"           unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sophteiv_ipc"      long_name="Heat Transport from mesoscale eddy advection: Pacific+Indian"   unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopstadv"          long_name="Advective Salt Transport"                                       unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstadv_atl"      long_name="Advective Salt Transport: Atlantic"                             unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstadv_pac"      long_name="Advective Salt Transport: Pacific"                              unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstadv_ind"      long_name="Advective Salt Transport: Indian"                               unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstadv_ipc"      long_name="Advective Salt Transport: Pacific+Indian"                       unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstove"          long_name="Overturning Salt Transport"                                     unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstove_atl"      long_name="Overturning Salt Transport: Atlantic"                           unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstove_pac"      long_name="Overturning Salt Transport: Pacific"                            unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstove_ind"      long_name="Overturning Salt Transport: Indian"                             unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstove_ipc"      long_name="Overturning Salt Transport: Pacific+Indian"                     unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstbtr"          long_name="Barotropic Salt Transport"                                      unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstbtr_atl"      long_name="Barotropic Salt Transport: Atlantic"                            unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstbtr_pac"      long_name="Barotropic Salt Transport: Pacific"                             unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstbtr_ind"      long_name="Barotropic Salt Transport: Indian"                              unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstbtr_ipc"      long_name="Barotropic Salt Transport: Pacific+Indian"                      unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstldf"          long_name="Diffusive Salt Transport"                                       unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstldf_atl"      long_name="Diffusive Salt Transport: Atlantic"                             unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstldf_pac"      long_name="Diffusive Salt Transport: Pacific"                              unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstldf_ind"      long_name="Diffusive Salt Transport: Indian"                               unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopstldf_ipc"      long_name="Diffusive Salt Transport: Pacific+Indian"                       unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopsteiv"          long_name="Salt Transport from mesoscale eddy advection"                   unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopsteiv_atl"      long_name="Salt Transport from mesoscale eddy advection: Atlantic"         unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopsteiv_pac"      long_name="Salt Transport from mesoscale eddy advection: Pacific"          unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopsteiv_ind"      long_name="Salt Transport from mesoscale eddy advection: Indian"           unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopsteiv_ipc"      long_name="Salt Transport from mesoscale eddy advection: Pacific+Indian"   unit="Giga g/s"   grid_ref="grid_znl_T_2D" />       
        <field id="sopht_vt"          long_name="Heat Transport"                                                 unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopht_vt_atl"      long_name="Heat Transport: Atlantic"                                       unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopht_vt_ind"      long_name="Heat Transport: Indian"                                         unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopht_vt_pac"      long_name="Heat Transport: Pacific"                                        unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopht_vt_ipc"      long_name="Heat Transport: Indo-Pacific"                                   unit="PW"         grid_ref="grid_znl_T_2D" />
        <field id="sopst_vs"          long_name="Salt Transport"                                                 unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopst_vs_atl"      long_name="Salt Transport: Atlantic"                                       unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopst_vs_ind"      long_name="Salt Transport: Indian"                                         unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopst_vs_pac"      long_name="Salt Transport: Pacific"                                        unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
        <field id="sopst_vs_ipc"      long_name="Salt Transport: Indo-Pacific"                                   unit="Giga g/s"   grid_ref="grid_znl_T_2D" />
      </field_group>

    <!-- 
============================================================================================================
                  Physical ocean model trend diagnostics : temperature, KE, PE, momentum
============================================================================================================
    -->

    <field_group id="trendT" grid_ref="grid_T_3D">
      <!-- variables available with ln_tra_trd -->
      <field id="ttrd_xad"      long_name="temperature-trend: i-advection"                                                                                          unit="degC/s"                        />
      <field id="strd_xad"      long_name="salinity   -trend: i-advection"                                                                                          unit="1e-3/s"                        />
      <field id="ttrd_yad"      long_name="temperature-trend: j-advection"                                                                                          unit="degC/s"                        />
      <field id="strd_yad"      long_name="salinity   -trend: j-advection"                                                                                          unit="1e-3/s"                        />
      <field id="ttrd_zad"      long_name="temperature-trend: k-advection"                                                                                          unit="degC/s"                        />
      <field id="strd_zad"      long_name="salinity   -trend: k-advection"                                                                                          unit="1e-3/s"                        />
      <field id="ttrd_ad"       long_name="temperature-trend: advection"               standard_name="tendency_of_sea_water_temperature_due_to_advection"           unit="degC/s"                         > sqrt( ttrd_xad^2 + ttrd_yad^2 + ttrd_zad^2 ) </field>
      <field id="strd_ad"       long_name="salinity   -trend: advection"               standard_name="tendency_of_sea_water_salinity_due_to_advection"              unit="1e-3/s"                         > sqrt( strd_xad^2 + strd_yad^2 + strd_zad^2 ) </field>
      <field id="ttrd_totad"    long_name="temperature-trend: total advection"         standard_name="tendency_of_sea_water_salinity_due_to_advection"              unit="degC/s"                        />
      <field id="strd_totad"    long_name="salinity   -trend: total advection"         standard_name="tendency_of_sea_water_salinity_due_to_advection"              unit="1e-3/s"                        />
      <field id="ttrd_sad"      long_name="temperature-trend: surface adv. (no-vvl)"                                                                                unit="degC/s"   grid_ref="grid_T_2D" />
      <field id="strd_sad"      long_name="salinity   -trend: surface adv. (no-vvl)"                                                                                unit="1e-3/s"   grid_ref="grid_T_2D" />
      <field id="ttrd_ldf"      long_name="temperature-trend: lateral  diffusion"      standard_name="tendency_of_sea_water_temperature_due_to_horizontal_mixing"   unit="degC/s"                        />
      <field id="strd_ldf"      long_name="salinity   -trend: lateral  diffusion"      standard_name="tendency_of_sea_water_salinity_due_to_horizontal_mixing"      unit="1e-3/s"                        />
      <field id="ttrd_zdf"      long_name="temperature-trend: vertical diffusion"      standard_name="tendency_of_sea_water_temperature_due_to_vertical_mixing"     unit="degC/s"                        />
      <field id="strd_zdf"      long_name="salinity   -trend: vertical diffusion"      standard_name="tendency_of_sea_water_salinity_due_to_vertical_mixing"        unit="1e-3/s"                        />
      <field id="ttrd_evd"      long_name="temperature-trend: EVD convection"                                                                                       unit="degC/s"                        />
      <field id="strd_evd"      long_name="salinity   -trend: EVD convection"                                                                                       unit="1e-3/s"                        />

      <!-- ln_traldf_iso=T only (iso-neutral diffusion) -->
      <field id="ttrd_iso_x"    long_name="temperature-trend: isopycnal diffusion x-component"         unit="degC/s" />
      <field id="strd_iso_x"    long_name="salinity   -trend: isopycnal diffusion x-component"         unit="1e-3/s" />
      <field id="ttrd_iso_y"    long_name="temperature-trend: isopycnal diffusion y-component"         unit="degC/s" />
      <field id="strd_iso_y"    long_name="salinity   -trend: isopycnal diffusion y-component"         unit="1e-3/s" />
      <field id="ttrd_iso_z1"   long_name="temperature-trend: isopycnal diffusion z-component part 1"  unit="degC/s" />
      <field id="strd_iso_z1"   long_name="salinity   -trend: isopycnal diffusion z-component part 1"  unit="1e-3/s" />
      <field id="ttrd_iso_z"    long_name="temperature-trend: isopycnal diffusion z-component"         unit="degC/s" > ttrd_iso_z1 + ttrd_zdf - ttrd_zdfp </field>
      <field id="strd_iso_z"    long_name="salinity   -trend: isopycnal diffusion z-component"         unit="1e-3/s" > strd_iso_z1 + strd_zdf - strd_zdfp </field>
      <field id="ttrd_iso"      long_name="temperature-trend: isopycnal diffusion"                     unit="degC/s" > ttrd_ldf + ttrd_zdf - ttrd_zdfp </field>
      <field id="strd_iso"      long_name="salinity   -trend: isopycnal diffusion"                     unit="1e-3/s" > strd_ldf + strd_zdf - strd_zdfp </field>
      <field id="ttrd_zdfp"     long_name="temperature-trend: pure vert. diffusion"                    unit="degC/s" />
      <field id="strd_zdfp"     long_name="salinity   -trend: pure vert. diffusion"                    unit="1e-3/s" />

      <!-- -->
      <field id="ttrd_dmp"      long_name="temperature-trend: interior restoring"        unit="degree_C/s" />
      <field id="strd_dmp"      long_name="salinity   -trend: interior restoring"        unit="0.001/s" />
      <field id="ttrd_bbl"      long_name="temperature-trend: bottom boundary layer"     unit="degree_C/s" />
      <field id="strd_bbl"      long_name="salinity   -trend: bottom boundary layer"     unit="0.001/s" />
      <field id="ttrd_npc"      long_name="temperature-trend: non-penetrative conv."     unit="degree_C/s" />
      <field id="strd_npc"      long_name="salinity   -trend: non-penetrative conv."     unit="0.001/s" />
      <field id="ttrd_qns"      long_name="temperature-trend: non-solar flux + runoff"   unit="degC/s" grid_ref="grid_T_2D"/>
      <field id="strd_cdt"      long_name="salinity   -trend: C/D term       + runoff"   unit="degC/s" grid_ref="grid_T_2D"/>
      <field id="ttrd_qsr"      long_name="temperature-trend: solar penetr. heating"     unit="degree_C/s" />
      <field id="ttrd_bbc"      long_name="temperature-trend: geothermal heating"        unit="degree_C/s" />
      <field id="ttrd_atf"      long_name="temperature-trend: asselin time filter"       unit="degree_C/s" />
      <field id="strd_atf"      long_name="salinity   -trend: asselin time filter"       unit="0.001/s" />
      <field id="ttrd_tot"      long_name="temperature-trend: total model trend"         unit="degC/s" />
      <field id="strd_tot"      long_name="salinity   -trend: total model trend"         unit="1e-3/s" />

      <!-- Thickness weighted versions: -->
      <field id="ttrd_xad_e3t"      unit="degC/s * m" >  ttrd_xad * e3t </field>
      <field id="strd_xad_e3t"      unit="1e-3/s * m" >  strd_xad * e3t </field>
      <field id="ttrd_yad_e3t"      unit="degC/s * m" >  ttrd_yad * e3t </field>
      <field id="strd_yad_e3t"      unit="1e-3/s * m" >  strd_yad * e3t </field>
      <field id="ttrd_zad_e3t"      unit="degC/s * m" >  ttrd_zad * e3t </field>
      <field id="strd_zad_e3t"      unit="1e-3/s * m" >  strd_zad * e3t </field>
      <field id="ttrd_ad_e3t"       unit="degC/s * m" >  ttrd_ad  * e3t </field>
      <field id="strd_ad_e3t"       unit="1e-3/s * m" >  strd_ad  * e3t </field>
      <field id="ttrd_totad_e3t"    unit="degC/s * m" >  ttrd_totad  * e3t </field>
      <field id="strd_totad_e3t"    unit="1e-3/s * m" >  strd_totad  * e3t </field>
      <field id="ttrd_ldf_e3t"      unit="degC/s * m" >  ttrd_ldf * e3t </field>
      <field id="strd_ldf_e3t"      unit="1e-3/s * m" >  strd_ldf * e3t </field>
      <field id="ttrd_zdf_e3t"      unit="degC/s * m" >  ttrd_zdf * e3t </field>
      <field id="strd_zdf_e3t"      unit="1e-3/s * m" >  strd_zdf * e3t </field>
      <field id="ttrd_evd_e3t"      unit="degC/s * m" >  ttrd_evd * e3t </field>
      <field id="strd_evd_e3t"      unit="1e-3/s * m" >  strd_evd * e3t </field>

      <!-- ln_traldf_iso=T only (iso-neutral diffusion) -->
      <field id="ttrd_iso_x_e3t"    unit="degC/s * m"  >  ttrd_iso_x * e3t </field>
      <field id="strd_iso_x_e3t"    unit="1e-3/s * m"  >  strd_iso_x * e3t </field>
      <field id="ttrd_iso_y_e3t"    unit="degC/s * m"  >  ttrd_iso_y * e3t </field>
      <field id="strd_iso_y_e3t"    unit="1e-3/s * m"  >  strd_iso_y * e3t </field>
      <field id="ttrd_iso_z_e3t"    unit="degC/s * m"  >  ttrd_iso_z * e3t </field>
      <field id="strd_iso_z_e3t"    unit="1e-3/s * m"  >  strd_iso_z * e3t </field>
      <field id="ttrd_iso_e3t"      unit="degC/s * m"  >  ttrd_iso * e3t </field>
      <field id="strd_iso_e3t"      unit="1e-3/s * m"  >  strd_iso * e3t </field>
      <field id="ttrd_zdfp_e3t"     unit="degC/s * m"  >  ttrd_zdfp * e3t </field>
      <field id="strd_zdfp_e3t"     unit="1e-3/s * m"  >  strd_zdfp * e3t </field>

      <!-- -->
      <field id="ttrd_dmp_e3t"      unit="degC/s * m"  >  ttrd_dmp * e3t </field>
      <field id="strd_dmp_e3t"      unit="1e-3/s * m"  >  strd_dmp * e3t </field>
      <field id="ttrd_bbl_e3t"      unit="degC/s * m"  >  ttrd_bbl * e3t </field>
      <field id="strd_bbl_e3t"      unit="1e-3/s * m"  >  strd_bbl * e3t </field>
      <field id="ttrd_npc_e3t"      unit="degC/s * m"  >  ttrd_npc * e3t </field>
      <field id="strd_npc_e3t"      unit="1e-3/s * m"  >  strd_npc * e3t </field>
      <field id="ttrd_qns_e3t"      unit="degC/s * m"  >  ttrd_qns * e3t_surf </field>
      <field id="strd_cdt_e3t"      unit="degC/s * m"  >  strd_cdt * e3t_surf </field>
      <field id="ttrd_qsr_e3t"      unit="degC/s * m"  >  ttrd_qsr * e3t </field>
      <field id="ttrd_bbc_e3t"      unit="degC/s * m"  >  ttrd_bbc * e3t </field>
      <field id="ttrd_atf_e3t"      unit="degC/s * m"  >  ttrd_atf * e3t </field>
      <field id="strd_atf_e3t"      unit="1e-3/s * m"  >  strd_atf * e3t </field>
      <field id="ttrd_tot_e3t"      unit="degC/s * m"  >  ttrd_tot * e3t </field>
      <field id="strd_tot_e3t"      unit="1e-3/s * m"  >  strd_tot * e3t </field>

      <!-- variables available with ln_KE_trd -->
      <field id="ketrd_hpg"     long_name="ke-trend: hydrostatic pressure gradient"          unit="W/s^3"                        />
      <field id="ketrd_spg"     long_name="ke-trend: surface     pressure gradient"          unit="W/s^3"                        />
      <field id="ketrd_spgexp"  long_name="ke-trend: surface pressure gradient (explicit)"   unit="W/s^3"                        />
      <field id="ketrd_spgflt"  long_name="ke-trend: surface pressure gradient (filter)"     unit="W/s^3"                        />
      <field id="ssh_flt"       long_name="filtered contribution to ssh (dynspg_flt)"        unit="m"       grid_ref="grid_T_2D" />
      <field id="w0"            long_name="surface vertical velocity"                        unit="m/s"     grid_ref="grid_T_2D" />
      <field id="pw0_exp"       long_name="surface pressure flux due to ssh"                 unit="W/s^2"   grid_ref="grid_T_2D" />
      <field id="pw0_flt"       long_name="surface pressure flux due to filtered ssh"        unit="W/s^2"   grid_ref="grid_T_2D" />
      <field id="ketrd_keg"     long_name="ke-trend: KE gradient         or hor. adv."       unit="W/s^3"                        />
      <field id="ketrd_rvo"     long_name="ke-trend: relative  vorticity or metric term"     unit="W/s^3"                        />
      <field id="ketrd_pvo"     long_name="ke-trend: planetary vorticity"                    unit="W/s^3"                        />
      <field id="ketrd_zad"     long_name="ke-trend: vertical  advection"                    unit="W/s^3"                        />
      <field id="ketrd_udx"     long_name="ke-trend: U.dx[U]"                                unit="W/s^3"                        />
      <field id="ketrd_ldf"     long_name="ke-trend: lateral   diffusion"                    unit="W/m^3"                        />
      <field id="ketrd_ldf_e3t" field_ref="ketrd_ldf" long_name="ke-trend: lateral   diffusion * e3t" unit="W/m^2" >ketrd_ldf*e3t</field>
      <field id="ketrd_ldf_vsum" field_ref="ketrd_ldf_e3t" long_name="ke-trend: lateral diffusion vertical integral" unit="W/m^2" grid_ref="vert_sum" />
      <field id="ketrd_zdf"     long_name="ke-trend: vertical  diffusion"                    unit="W/s^3"                        />
      <field id="ketrd_tau"     long_name="ke-trend: wind stress "                           unit="W/s^3"   grid_ref="grid_T_2D" />
      <field id="ketrd_bfr"     long_name="ke-trend: bottom friction (explicit)"             unit="W/s^3"                        />   
      <field id="ketrd_bfri"    long_name="ke-trend: bottom friction (implicit)"             unit="W/s^3"                        />   
      <field id="ketrd_atf"     long_name="ke-trend: asselin time filter trend"              unit="W/s^3"                        />  
      <field id="ketrd_convP2K" long_name="ke-trend: conversion (potential to kinetic)"      unit="W/s^3"                        />
      <field id="KE"            long_name="kinetic energy: u(n)*u(n+1)/2"                    unit="W/s^2"                        />   
      <field id="ketrd_eiv"     long_name="Kinetic energy trend from mesoscale eddy advection"   unit="W/s^2" grid_ref="grid_T_2D" />   

      <!-- variables available with ln_PE_trd -->
      <field id="petrd_xad"     long_name="pe-trend: i-advection"                unit="W/m^3"                        />
      <field id="petrd_yad"     long_name="pe-trend: j-advection"                unit="W/m^3"                        />
      <field id="petrd_zad"     long_name="pe-trend: k-advection"                unit="W/m^3"                        />
      <field id="petrd_sad"     long_name="pe-trend: surface adv. (no-vvl)"      unit="W/m^3"   grid_ref="grid_T_2D" />
      <field id="petrd_ldf"     long_name="pe-trend: lateral  diffusion"         unit="W/m^3"                        />
      <field id="petrd_zdf"     long_name="pe-trend: vertical diffusion"         unit="W/m^3"                        />
      <field id="petrd_zdfp"    long_name="pe-trend: pure vert. diffusion"       unit="W/m^3"                        />
      <field id="petrd_dmp"     long_name="pe-trend: interior restoring"         unit="W/m^3"                        />
      <field id="petrd_bbl"     long_name="pe-trend: bottom boundary layer"      unit="W/m^3"                        />
      <field id="petrd_npc"     long_name="pe-trend: non-penetrative conv."      unit="W/m^3"                        />
      <field id="petrd_nsr"     long_name="pe-trend: surface forcing + runoff"   unit="W/m^3"                        />
      <field id="petrd_qsr"     long_name="pe-trend: solar penetr. heating"      unit="W/m^3"                        />
      <field id="petrd_bbc"     long_name="pe-trend: geothermal heating"         unit="W/m^3"                        />
      <field id="petrd_atf"     long_name="pe-trend: asselin time filter"        unit="W/m^3"                        />
      <field id="PEanom"        long_name="potential energy anomaly"             unit="1"                            />   
      <field id="alphaPE"       long_name="partial deriv. of PEanom wrt T"       unit="degC-1"                       />   
      <field id="betaPE"        long_name="partial deriv. of PEanom wrt S"       unit="1e3"                          />   
      <field id="petrd_zdfp_e3t"    unit="W/m^2" grid_ref="grid_T_3D"  > petrd_zdfp * e3t </field>
    </field_group>

    <field_group id="trendU" grid_ref="grid_U_3D">
     <!-- variables available with ln_dyn_trd -->
     <field id="utrd_hpg"       long_name="i-trend: hydrostatic pressure gradient"          unit="m/s^2"                        />
     <field id="utrd_spg"       long_name="i-trend: surface     pressure gradient"          unit="m/s^2"                        />
     <field id="utrd_spgexp"    long_name="i-trend: surface pressure gradient (explicit)"   unit="m/s^2"                        />
     <field id="utrd_spgflt"    long_name="i-trend: surface pressure gradient (filtered)"   unit="m/s^2"                        />
     <field id="utrd_keg"       long_name="i-trend: KE gradient         or hor. adv."       unit="m/s^2"                        />
     <field id="utrd_rvo"       long_name="i-trend: relative  vorticity or metric term"     unit="m/s^2"                        />
     <field id="utrd_pvo"       long_name="i-trend: planetary vorticity"                    unit="m/s^2"                        />
     <field id="utrd_zad"       long_name="i-trend: vertical  advection"                    unit="m/s^2"                        />
     <field id="utrd_udx"       long_name="i-trend: U.dx[U]"                                unit="m/s^2"                        />
     <field id="utrd_ldf"       long_name="i-trend: lateral   diffusion"                    unit="m/s^2"                        />
     <field id="utrd_zdf"       long_name="i-trend: vertical  diffusion"                    unit="m/s^2"                        />
     <field id="utrd_tau"       long_name="i-trend: wind stress "                           unit="m/s^2"   grid_ref="grid_U_2D" />
     <field id="utrd_bfr"       long_name="i-trend: bottom friction (explicit)"             unit="m/s^2"                        />   
     <field id="utrd_bfri"      long_name="i-trend: bottom friction (implicit)"             unit="m/s^2"                        />   
     <field id="utrd_tot"       long_name="i-trend: total momentum trend before atf"        unit="m/s^2"                        />   
     <field id="utrd_atf"       long_name="i-trend: asselin time filter trend"              unit="m/s^2"                        />   
    </field_group>

    <field_group id="trendV" grid_ref="grid_V_3D">
     <!-- variables available with ln_dyn_trd -->
     <field id="vtrd_hpg"       long_name="j-trend: hydrostatic pressure gradient"          unit="m/s^2"                        />
     <field id="vtrd_spg"       long_name="j-trend: surface     pressure gradient"          unit="m/s^2"                        />
     <field id="vtrd_spgexp"    long_name="j-trend: surface pressure gradient (explicit)"   unit="m/s^2"                        />
     <field id="vtrd_spgflt"    long_name="j-trend: surface pressure gradient (filtered)"   unit="m/s^2"                        />
     <field id="vtrd_keg"       long_name="j-trend: KE gradient         or hor. adv."       unit="m/s^2"                        />
     <field id="vtrd_rvo"       long_name="j-trend: relative  vorticity or metric term"     unit="m/s^2"                        />
     <field id="vtrd_pvo"       long_name="j-trend: planetary vorticity"                    unit="m/s^2"                        />
     <field id="vtrd_zad"       long_name="j-trend: vertical  advection"                    unit="m/s^2"                        />
     <field id="vtrd_vdy"       long_name="i-trend: V.dx[V]"                                unit="m/s^2"                        />
     <field id="vtrd_ldf"       long_name="j-trend: lateral   diffusion"                    unit="m/s^2"                        />
     <field id="vtrd_zdf"       long_name="j-trend: vertical  diffusion"                    unit="m/s^2"                        />
     <field id="vtrd_tau"       long_name="j-trend: wind stress "                           unit="m/s^2"   grid_ref="grid_V_2D" />
     <field id="vtrd_bfr"       long_name="j-trend: bottom friction (explicit)"             unit="m/s^2"                        />   
     <field id="vtrd_bfri"      long_name="j-trend: bottom friction (implicit)"             unit="m/s^2"                        />   
     <field id="vtrd_tot"       long_name="j-trend: total momentum trend before atf"        unit="m/s^2"                        />   
     <field id="vtrd_atf"       long_name="j-trend: asselin time filter trend"              unit="m/s^2"                        />   
    </field_group>


    <!-- 
============================================================================================================
                                        Definitions for iodef_demo.xml
============================================================================================================
    -->

    <field_group id="mooring" >
      <field field_ref="toce"         name="thetao"   long_name="sea_water_potential_temperature"      />
      <field field_ref="soce"         name="so"       long_name="sea_water_salinity"                   />
      <field field_ref="uoce"         name="uo"       long_name="sea_water_x_velocity"                 />
      <field field_ref="voce"         name="vo"       long_name="sea_water_y_velocity"                 />
      <field field_ref="woce"         name="wo"       long_name="sea_water_z_velocity"                 />
      <field field_ref="avt"          name="difvho"   long_name="ocean_vertical_heat_diffusivity"      />
      <field field_ref="avm"          name="difvmo"   long_name="ocean_vertical_momentum_diffusivity"  />
   
      <field field_ref="sst"          name="tos"      long_name="sea_surface_temperature"                       />
      <field field_ref="sst2"         name="tossq"    long_name="square_of_sea_surface_temperature"             />
      <field field_ref="sstgrad"      name="tosgrad"  long_name="module_of_sea_surface_temperature_gradient"    />
      <field field_ref="sss"          name="sos"      long_name="sea_surface_salinity"                          />
      <field field_ref="ssh"          name="zos"      long_name="sea_surface_height_above_geoid"                />
      <field field_ref="empmr"        name="wfo"      long_name="water_flux_into_sea_water"                     />
      <field field_ref="qsr"          name="rsntds"   long_name="surface_net_downward_shortwave_flux"           />
      <field field_ref="qt"           name="tohfls"   long_name="surface_net_downward_total_heat_flux"          />
      <field field_ref="taum"                                                                                   />
      <field field_ref="20d"                                                                                    />
      <field field_ref="mldkz5"                                                                                 />
      <field field_ref="mldr10_1"                                                                               />
      <field field_ref="mldr10_3"                                                                               />
      <field field_ref="mldr0_1"                                                                                />
      <field field_ref="mldr0_3"                                                                                />
      <field field_ref="mld_dt02"                                                                               />
      <field field_ref="topthdep"                                                                               />
      <field field_ref="pycndep"                                                                                />
      <field field_ref="tinv"                                                                                   />
      <field field_ref="depti"                                                                                  />
      <field field_ref="BLT"          name="blt"      long_name="barrier_layer_thickness"                       />
      <field field_ref="utau"         name="tauuo"    long_name="surface_downward_x_stress"                     />
      <field field_ref="vtau"         name="tauvo"    long_name="surface_downward_y_stress"                     />
    </field_group>

    <field_group id="groupT" >
      <field field_ref="toce"         name="thetao"   long_name="sea_water_potential_temperature"               />
      <field field_ref="soce"         name="so"       long_name="sea_water_salinity"                            />
      <field field_ref="sst"          name="tos"      long_name="sea_surface_temperature"                       />
      <field field_ref="sst2"         name="tossq"    long_name="square_of_sea_surface_temperature"             />
      <field field_ref="sss"          name="sos"      long_name="sea_surface_salinity"                          />
      <field field_ref="ssh"          name="zos"      long_name="sea_surface_height_above_geoid"                />
      <field field_ref="empmr"        name="wfo"      long_name="water_flux_into_sea_water"                     />
      <field field_ref="qsr"          name="rsntds"   long_name="surface_net_downward_shortwave_flux"           />
      <field field_ref="qt"           name="tohfls"   long_name="surface_net_downward_total_heat_flux"          />
      <field field_ref="taum"                                                                                   />
      <field field_ref="20d"                                                                                    />
      <field field_ref="mldkz5"                                                                                 />
      <field field_ref="mldr10_1"                                                                               />
      <field field_ref="mldr10_3"                                                                               />
      <field field_ref="mld_dt02"                                                                               />
      <field field_ref="topthdep"                                                                               />
      <field field_ref="pycndep"                                                                                />
      <field field_ref="tinv"                                                                                   />
      <field field_ref="depti"                                                                                  />
      <field field_ref="BLT"          name="blt"      long_name="Barrier Layer Thickness"                       />
    </field_group>
    
    <field_group id="groupU" >
      <field field_ref="uoce"         name="uo"      long_name="sea_water_x_velocity"      />
      <field field_ref="ssu"          name="uos"     long_name="sea_surface_x_velocity"    />
      <field field_ref="utau"         name="tauuo"   long_name="surface_downward_x_stress" />
    </field_group>
    
    <field_group id="groupV" >
      <field field_ref="voce"         name="vo"      long_name="sea_water_y_velocity"      />
      <field field_ref="ssv"          name="vos"     long_name="sea_surface_y_velocity"    />
      <field field_ref="vtau"         name="tauvo"   long_name="surface_downward_y_stress" />
    </field_group>
    
    <field_group id="groupW" >
      <field field_ref="woce"         name="wo"       long_name="ocean vertical velocity"  />
    </field_group>

     <field_group id="groupPTR"  >
        <field field_ref="zomsfglo"          name="zomsfglo"  grid_ref="grid_znl_W_3D" />
        <field field_ref="zomsfatl"          name="zomsfatl"  grid_ref="grid_znl_W_3D" />
        <field field_ref="zomsfpac"          name="zomsfpac"  grid_ref="grid_znl_W_3D" />
        <field field_ref="zomsfind"          name="zomsfind"  grid_ref="grid_znl_W_3D" />
        <field field_ref="zomsfipc"          name="zomsfipc"  grid_ref="grid_znl_W_3D" />
        <field field_ref="zotemglo"          name="zotemglo"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zotematl"          name="zotematl"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zotempac"          name="zotempac"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zotemind"          name="zotemind"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zotemipc"          name="zotemipc"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosalglo"          name="zosalglo"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosalatl"          name="zosalatl"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosalpac"          name="zosalpac"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosalind"          name="zosalind"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosalipc"          name="zosalipc"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosrfglo"          name="zosrfglo"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosrfatl"          name="zosrfatl"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosrfpac"          name="zosrfpac"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosrfind"          name="zosrfind"  grid_ref="grid_znl_T_3D" />
        <field field_ref="zosrfipc"          name="zosrfipc"  grid_ref="grid_znl_T_3D" />
        <field field_ref="sophtadv"          name="sophtadv"  grid_ref="grid_znl_T_2D" />
        <field field_ref="sophtldf"          name="sophtldf"  grid_ref="grid_znl_T_2D" />
        <field field_ref="sopstadv"          name="sopstadv"  grid_ref="grid_znl_T_2D" />
        <field field_ref="sopstldf"          name="sopstldf"  grid_ref="grid_znl_T_2D" />
      </field_group>
    

   </field_definition>
