! File: m_prep_4_EnKF.F90 ! ! Created: ??? ! ! Last modified: 29/06/2010 ! ! Purpose: Calculation of HA ("S") ! ! Description: Calculates HA by going sequentially through each data type. ! ! Modifications: ! 09/11/2012 Geir Arne Waagbo: ! - Added support for OSISAF ice drift obs ! 29/07/2010 PS: ! - merged insitu_QC() with generic obs_QC(). Moved ! insitu_writeforecast() to the point after QC. ! 29/06/2010 PS: ! - added generic observation QC: increase the observation ! error when observation and ensemble mean are much too far ! away than expected ! Prior history: ! Not documented. module m_prep_4_EnKF integer, parameter, private :: STRLEN = 512 private read_mean_ssh contains ! This subroutine uses the observation and ensembles from the model ! to prepare the input to the EnKF analysis scheme. ! The output from this routine is used directly in the global analysis ! while the output has to be run through a "filter" to be used in the ! local analysis scheme. ! S = HA (ensemble observation anomalies) ! d = d - Hx (innovations) ! ! S is calculated in two steps: ! 1. S = HE ! 2. S = S - repmat(s, 1, m), ! where s = mean(S')'; ! Note that in reality (with HYCOM) H is different for each member... ! So that HX must be read "HX" rather than "H * X". ! subroutine prep_4_EnKF(nrens, enslist, d, S, depths, meandx, nx, ny, nz) #if defined (QMPI) use qmpi, only : master, stop_mpi #else use qmpi_fake, only : master, stop_mpi #endif use mod_measurement use m_obs use m_Generate_element_Si use m_get_mod_fld use m_read_icemod use m_parameters implicit none integer, intent(in) :: nx, ny, nz ! Model size integer, intent(in) :: nrens ! Size of ensemble integer, dimension(:),intent(in) :: enslist ! [CKB,FM] List of existing ens members real, intent(in) :: depths(nx, ny) real, intent(in) :: meandx ! mean grid size real, intent(inout) :: d(nobs) real, intent(inout) :: S(nobs, nrens) real :: x(nobs) integer :: i, j, m, iens real*4, dimension(nx,ny) :: fldr4 real :: readfld(nx, ny), ai1(nx,ny), ai2(nx,ny), ai3(nx,ny), ai4(nx,ny), ai5(nx,ny), uice(nx,ny), vice(nx,ny) real :: vi1(nx,ny), vi2(nx,ny), vi3(nx,ny), vi4(nx,ny), vi5(nx,ny) real :: vs1(nx,ny), vs2(nx,ny), vs3(nx,ny), vs4(nx,ny), vs5(nx,ny) ! hard-coded for now integer, parameter :: drnx = 152, drny = 132 real*4, dimension(drnx, drny) :: modzon, modmer integer, parameter :: drnx_osisaf = 119, drny_osisaf = 177 real*4, dimension(drnx_osisaf, drny_osisaf) :: dX, dY integer :: reclSLA, ios, reclDRIFT character*3 :: cmem character*2 :: day character*1 :: offset logical :: ex character(STRLEN) :: fname integer :: iuobs ! FANF: For track assim we launch m_Generate_Si for each day (t=1:Wd) ! which fills in S at the approriate indices. ! Wd is is the assimilation cycle (i.e. 7 days) ! integer :: Wd, t integer :: tlevel real :: field2(nx, ny), field3(nx, ny) ! auxiliary fields (e.g. mean SSH, ! field bias estimate etc.) integer :: nthisobs, thisobs(nobs) if (any(obs(:) % id == 'TSLA ')) then Wd = 6 else Wd = 0 endif ! security check ! if (any(obs(:) % id == 'SSH ') .or. any(obs(:) % id == 'SLA ')) then if (any(obs(:) % id == 'SLA ')) then inquire(exist = ex, file = 'model_SLA.uf') if (.not.ex) then if (master) print *,'model_SLA.uf does not exist' call stop_mpi() end if end if if (any(obs(:) % id == 'SSH ')) then inquire(exist = ex, file = 'model_SSH.uf') if (.not.ex) then if (master) print *,'model_SSH.uf does not exist' call stop_mpi() end if end if end if ! construct S=HA ! do iuobs = 1, nuobs if (master) then print *, 'prep_4_EnKF: now preparing "', trim(unique_obs(iuobs)), '" observations' end if if (trim(unique_obs(iuobs)) == 'ICEC') then do iens = 1, nrens write(cmem,'(i3.3)') iens tlevel = 1 call get_mod_fld_new(trim('forecast'//cmem), readfld, iens,& 'icec', 0, tlevel, nx, ny) if (tlevel == -1) then if (master) then print *, 'ERROR: get_mod_fld_new(): failed for "icec"' end if stop end if call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do ! [FM, May 2013: for LIM3 sea ice model] elseif (trim(unique_obs(iuobs)) == 'AT_I') then do iens = 1, nrens write(cmem,'(i3.3)') iens tlevel = 1 call io_mod_fld(ai1,iens,enslist, & 'a_i_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai2,iens,enslist, & 'a_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai3,iens,enslist, & 'a_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai4,iens,enslist, & 'a_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai5,iens,enslist, & 'a_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) if (tlevel == -1) then if (master) then print *, 'ERROR: io_mod_fld_new(): failed for "at_i"' end if stop end if ! Multipply by 100 to match obs conventions readfld=(ai1+ai2+ai3+ai4+ai5) * 100.0 call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do ! [AD] March 2024: for NEMO-SI3 first test assim. siconc from nemo itself] elseif (trim(unique_obs(iuobs)) == 'SICON') then do iens = 1, nrens write(cmem,'(i3.3)') iens tlevel = 1 call io_mod_fld(ai1,iens,enslist, & 'a_i', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) !call io_mod_fld(ai2,iens,enslist, & ! 'a_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) !call io_mod_fld(ai3,iens,enslist, & ! 'a_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) !call io_mod_fld(ai4,iens,enslist, & ! 'a_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) !call io_mod_fld(ai5,iens,enslist, & ! 'a_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) if (tlevel == -1) then if (master) then print *, 'ERROR: io_mod_fld_new(): failed for "sicon"' end if stop end if ! Multipply by 100 to match obs conventions !readfld=(ai1+ai2+ai3+ai4+ai5) * 100.0 readfld=(ai1) * 100.0 call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do ! [AD] April 2024: for NEMO-SI3 first test assim. sic from OSI-SAF interpoled on eORCA1] elseif (trim(unique_obs(iuobs)) == 'SIC') then do iens = 1, nrens write(cmem,'(i3.3)') iens tlevel = 1 call io_mod_fld(ai1,iens,enslist, & 'a_i', 1, 1, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai2,iens,enslist, & 'a_i', 1, 2, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai3,iens,enslist, & 'a_i', 1, 3, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai4,iens,enslist, & 'a_i', 1, 4, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai5,iens,enslist, & 'a_i', 1, 5, 1, nx,ny, 'get',FLOAT(obs(1)%date)) if (tlevel == -1) then if (master) then print *, 'ERROR: io_mod_fld_new(): failed for "SIC"' end if stop end if ! Multipply by 100 to match obs conventions readfld=(ai1+ai2+ai3+ai4+ai5) * 100.0 ! readfld=(ai1) * 100.0 call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do ! freeboard elseif(trim(unique_obs(iuobs)) == 'VT_I') then do iens = 1, nrens write(cmem, '(i3.3)') iens tlevel = 1 call io_mod_fld(ai1,iens,enslist, & 'a_i_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai2,iens,enslist, & 'a_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai3,iens,enslist, & 'a_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai4,iens,enslist, & 'a_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai5,iens,enslist, & 'a_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi1,iens,enslist, & 'v_i_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi2,iens,enslist, & 'v_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi3,iens,enslist, & 'v_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi4,iens,enslist, & 'v_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi5,iens,enslist, & 'v_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) if (tlevel == -1) then if (master) then print *, 'ERROR: io_mod_fld_nex(): failed for "SIFB"' end if stop end if readfld=(vi1+vi2+vi3+vi4+vi5) call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do ! freeboard elseif(trim(unique_obs(iuobs)) == 'RFB') then do iens = 1, nrens write(cmem, '(i3.3)') iens tlevel = 1 call io_mod_fld(ai1,iens,enslist, & 'a_i_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai2,iens,enslist, & 'a_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai3,iens,enslist, & 'a_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai4,iens,enslist, & 'a_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(ai5,iens,enslist, & 'a_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi1,iens,enslist, & 'v_i_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi2,iens,enslist, & 'v_i_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi3,iens,enslist, & 'v_i_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi4,iens,enslist, & 'v_i_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vi5,iens,enslist, & 'v_i_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vs1,iens,enslist, & 'v_s_htc1', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vs2,iens,enslist, & 'v_s_htc2', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vs3,iens,enslist, & 'v_s_htc3', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vs4,iens,enslist, & 'v_s_htc4', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vs5,iens,enslist, & 'v_s_htc5', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) if (tlevel == -1) then if (master) then print *, 'ERROR: io_mod_fld_nex(): failed for "SIFB"' end if stop end if readfld=(((vi1+vi2+vi3+vi4+vi5) * (1024.0 - 899.5) - 330 * (vs1+vs2+vs3+vs4+vs5)) / & 1024.0-0.25*(vs1 +vs2+vs3+vs4+vs5)) !readfld=(((vi1+vi2+vi3+vi4+vi5) * (1024.0 - 899.5) - 330 * (vs1+vs2+vs3+vs4+vs5)) / 1024.0 - 0.25 * (vs1+vs2+vs3+vs4+vs5)) / (ai1+ai2+ai3+ai4+ai5) ! Conversion of models' sea ice thickness and snow thickness to ! model's freeboard using fixed densities for snow (330 kg/m3), ice ! (899.5 kg/m3 = average of MYI and FYI from Guerreiro et al. 2017 ! and seawater (1024 kg/m3). The model freeboard is then lowered by ! 25% of the snow depth to account for the fact that the radar ! measurement underestimates the actual freeboard due to the lower ! propagation speed of the wave into the snow than in the air. ! Everything is converted from grid cell mean to in situ by ! dividing by concentration (if it is not zero). See exchanges ! e-mail with Sara Fleury 7 December 2020. call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do elseif (trim(unique_obs(iuobs)) == 'SST') then do iens = 1, nrens write(cmem,'(i3.3)') iens tlevel = 1 call get_mod_fld_new(trim('forecast'//cmem), readfld, iens,& 'tn', 1, tlevel, nx, ny) PRINT *, "FRANCOIS" if (tlevel == -1) then if (master) then print *, 'ERROR: get_mod_fld_new(): failed for "SST"' end if stop end if if (prm_prmestexists('sstb')) then tlevel = 1 call get_mod_fld_new(trim('forecast'//cmem), field2, iens,& 'sstb', 0, tlevel, nx, ny) if (tlevel == -1) then if (master) then print *, 'ERROR: get_mod_fld_new(): failed for "sstb"' end if stop end if readfld = readfld - field2 end if call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, 0) end do elseif (trim(unique_obs(iuobs)) == 'SLA' .or.& trim(unique_obs(iuobs)) == 'TSLA') then if (trim(unique_obs(iuobs)) == 'TSLA') then call read_mean_ssh(field2, nx, ny) end if inquire(iolength=reclSLA) fldr4 ! FANF loop over each day of the week do t = 0, Wd if (trim(unique_obs(iuobs)) == 'TSLA') then write(day,'(i2.2)') t fname = trim('model_TSSH_'//day//'.uf') else fname = 'model_SLA.uf' endif if (master) then print *, 'TSLA, day', t, ': nobs = ',& count(obs(uobs_begin(iuobs) : uobs_end(iuobs)) % date == t) end if do iens = 1, nrens open(10, file = trim(fname), access = 'direct',& status = 'old', recl = reclSLA, action = 'read') read(10, rec = iens, iostat = ios) fldr4 if (ios /= 0) then if (master) print *, 'Error reading ', trim(fname), ', member #', iens call stop_mpi() end if close(10) readfld = fldr4 if (prm_prmestexists('msshb')) then write(cmem,'(i3.3)') iens tlevel = 1 call get_mod_fld_new(trim('forecast'//cmem), field3, iens,& 'msshb', 0, tlevel, nx, ny) if (tlevel == -1) then if (master) then print *, 'ERROR: get_mod_fld_new(): failed for "msshb"' end if stop end if readfld = readfld - field3 ! mean SSH bias for this member end if if (trim(unique_obs(iuobs)) == 'TSLA') then readfld = readfld - field2 ! mean SSH end if call Generate_element_Si(S(:, iens), unique_obs(iuobs),& readfld, depths, nx, ny, nz, t) end do if (master) then print *, 'forming S, day', t print *, ' # of non-zero ens observations = ', count(S /= 0.0) print *, ' # of zero ens observations = ', count(S == 0.0) print *, ' # of non-zero observations for member 1 = ', count(S(:, 1) /= 0.0) end if end do elseif (trim(unique_obs(iuobs)) == 'SAL' .or.& trim(unique_obs(iuobs)) == 'TEM' .or.& trim(unique_obs(iuobs)) == 'GSAL' .or.& trim(unique_obs(iuobs)) == 'GTEM') then if (master) then print *, ' Interpolating ensemble vectors to the locations of "',& trim(unique_obs(iuobs)), '" observations' end if ! ! for each ensemble member process all profiles "in parallel", ! reading the fields layer by layer ! do iens = 1, nrens call get_S(S(:, iens), trim(unique_obs(iuobs)), nobs, obs, iens) end do if (master) then print *, ' Interpolation completed' end if elseif ((trim(unique_obs(iuobs)) == 'U_ICE') .or. trim(unique_obs(iuobs)) == 'V_ICE') then do iens = 1, nrens ! [FM] Read the file !inquire(iolength=reclDRIFT) modzon, modmer !open(10, file = 'model_ICEDRIFT.uf', access = 'direct',& ! status = 'old', recl = reclDRIFT, action = 'read') !read(10, rec = iens, iostat = ios) modzon, modmer !close(10) !if (ios /= 0) then ! if (master) then ! print *,'ERROR: could not read ensemble ice drift for member ', iens ! end if ! call stop_mpi() !end if call io_mod_fld(uice,iens,enslist, & 'u_ice', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) call io_mod_fld(vice,iens,enslist, & 'v_ice', 1, 0, 1, nx,ny, 'get',FLOAT(obs(1)%date)) do m = 1, nobs i = obs(m) % i_orig_grid j = obs(m) % j_orig_grid if (trim(obs(m) % id) == 'U_ICE') then S(m, iens) = uice(i, j) elseif (trim(obs(m) % id) == 'V_ICE') then S(m, iens) = vice(i, j) end if end do end do elseif ((trim(unique_obs(iuobs)) == 'U2D_I') .OR. trim(unique_obs(iuobs)) == 'V2D_I' ) THEN ! ADDED BY FM FRANCOIS MASSONNET. u_ice_2d or v_ice_2d is the sea ice u or v-velocity ! obtained as follows: ! 1) Rotate OSISAF Low resolution 2-day sea ice drift in a {east,north} ! reference frame ! 2) Interpolate to the ORCA grid ! 3) Rotate to align with the ORCA grid ! 4) Multiply by 1000 and divide by 2*86400 to convert the 2-day ! displacement from km to m/s DO iens=1,nrens CALL read_icemod(uice,iens,enslist,'iicevelu',nx,ny) CALL read_icemod(vice,iens,enslist,'iicevelv',nx,ny) DO m = 1, nobs i = obs(m) % i_orig_grid j = obs(m) % j_orig_grid IF (trim(obs(m) % id) == 'U2D_I') THEN S(m,iens) = uice(i,j) ELSEIF (trim(obs(m) % id) == 'V2D_I') THEN S(m,iens) = vice(i,j) END IF END DO ! nobs END DO ! iens elseif ((index(unique_obs(iuobs),'DX') > 0 ) .or. (index(unique_obs(iuobs),'DY') > 0)) then ! OSISAF Ice drift observations (d-2-offset -> d-offset) !print *, 'Ice drift observation type: ', unique_obs(iuobs) offset = unique_obs(iuobs)(3:3) ! Use offset (1,2,3,4 or 5) to open correct model drift file inquire(iolength=reclDRIFT) dX, dY open(10, file = 'model_ICEDRIFT_OSISAF'//offset//'.uf', access = 'direct',& status = 'old', recl = reclDRIFT, action = 'read') do iens = 1, nrens read(10, rec = iens, iostat = ios) dX, dY if (ios /= 0) then if (master) then print *,'ERROR: could not read ensemble ice drift for member ', iens end if call stop_mpi() end if do m = 1, nobs i = obs(m) % i_orig_grid j = obs(m) % j_orig_grid if (index(obs(m)%id,'DX') > 0) then S(m, iens) = dX(i, j) elseif (index(obs(m)%id,'DY') > 0) then S(m, iens) = dY(i, j) end if end do end do close(10) else if (master) then print *,'ERROR: unknown obs type ' // trim(unique_obs(iuobs)) end if call stop_mpi() end if end do ! iuobs ! some generic QC - relax fitting if the model and obs are too far apart ! call obs_QC(nrens, S) ! add calculated HA to to observations-.nc files for each data type ! do iuobs = 1, nuobs if (master) then nthisobs = 0 do m = 1, nobs if (trim(unique_obs(iuobs)) == trim(obs(m) % id)) then nthisobs = nthisobs + 1 thisobs(nthisobs) = m end if end do ! add forecast values to the observation-.nc files ! call add_forecast(unique_obs(iuobs), S(thisobs(1 : nthisobs), :), obs(thisobs(1 : nthisobs))) ! append the superobed values (and modified observation error ! variances) to the file with pre-processed observations (SAL.nc, ! TEM.nc, GSAL.nc or GTEM.nc) ! if (trim(unique_obs(iuobs)) == 'SAL' .or.& trim(unique_obs(iuobs)) == 'TEM' .or.& trim(unique_obs(iuobs)) == 'GSAL' .or.& trim(unique_obs(iuobs)) == 'GTEM') then call insitu_writeforecast(unique_obs(iuobs), nobs, nrens, S, obs) end if end if end do if (master) then print *, 'm_prep_4_EnKF: end calculating S = HA' end if x = sum(S, DIM = 2) / real(nrens) ! [ FM ] The mean forecast interpolated in the obs.space if (master) print*,'m_prep_4_EnKF: end calculating Hx' if (master) then print *, 'Hx range = ', minval(x), '-', maxval(x) print *, 'mean(Hx) = ', sum(x) / real(nobs) end if if (master) then print *, 'observation range = ', minval(obs % d), '-', maxval(obs % d) print *, 'mean(observation) = ', sum(obs % d) / nobs end if ! Compute HA = HE - mean(HE) ! if (master) print*,'prep_4_EnKF(): calculating S = S - x' do j = 1, nrens S(:, j) = S(:, j) - x ! [ FM ] This is really where we switch from actual model data to anomalies enddo ! Compute innovation ! d = obs % d - x ! [ FM ] This is exactly was is also done in add_forecast. This is the mean innovation. if (master) then print *, ' innovation range = ', minval(d), '-', maxval(d) if (minval(d) < -1000.0d0) then print *, 'm_prep_4_EnKF: error: innovation too small detected' call stop_mpi() end if if (maxval(d) > 1000.0d0) then print *, 'm_prep_4_EnKF: error: innovation too big detected' call stop_mpi() end if end if end subroutine prep_4_EnKF subroutine read_mean_ssh(mean_ssh, nx, ny) #if defined (QMPI) use qmpi #else use qmpi_fake #endif use m_parameters integer, intent(in) :: nx, ny real, intent(out):: mean_ssh(nx, ny) logical :: exists inquire(file = trim(MEANSSHFNAME), exist = exists) if (.not. exists) then if (master) then print *,'ERROR: read_mean_ssh(): file "', trim(MEANSSHFNAME), '" not found' end if stop end if open (10, file = trim(MEANSSHFNAME), status = 'unknown',form = 'unformatted', action = 'read') read (10) mean_ssh close (10) end subroutine read_mean_ssh ! This subroutine adds forecast observations (i.e Hx) to the NetCDF ! observation files for each data type. ! subroutine add_forecast(obstag, S, obs) use mod_measurement use nfw_mod implicit none character(OBSTYPESTRLEN), intent(in) :: obstag real, dimension(:, :), intent(in) :: S type(measurement), dimension(:) :: obs character(STRLEN) :: fname logical :: exists integer :: ncid integer :: dids(2), dimlen logical :: addsobs integer :: for_id, inn_id, forvar_id, slon_id, slat_id,& sdepth_id, sipiv_id, sjpiv_id, sd_id, svar_id,& newvar_id real, allocatable, dimension(:) :: x, Svar, innovation integer :: m, p, o write(fname, '(a, a, a)') 'observations-', trim(obstag), '.nc' inquire(file = trim(fname), exist = exists) if (.not. exists) then print *, 'file "', trim(fname), 'not found, skip adding forecast' return else print *, 'dumping forecast to "', trim(fname), '"' end if p = size(S, DIM = 1) m = size(S, DIM = 2) allocate(x(p), Svar(p), innovation(p)) x = sum(S, DIM = 2) / real(m); ! [ FM the mean of S=HA ] Svar = 0.0 do o = 1, p Svar(o) = sum((S(o, :) - x(o))** 2) ! [ FM thus each row of Svar is the variance (see below) of the forecast] end do Svar = Svar / real(m - 1) innovation = obs % d - x ! [ FM ] the innovation for the mean forecast (or mean of the innovation forecasts) addsobs = .false. call nfw_open(fname, nf_write, ncid) call nfw_inq_dimid(fname, ncid, 'nobs', dids(1)) call nfw_inq_dimlen(fname, ncid, dids(1), dimlen) call nfw_redef(fname, ncid) if (dimlen == p) then dids(2) = dids(1) elseif (.not. nfw_dim_exists(ncid, 'nsobs')) then addsobs = .true. call nfw_def_dim(fname, ncid, 'nsobs', p, dids(2)) call nfw_def_var(fname, ncid, 'slon', nf_float, 1, dids(2), slon_id) call nfw_def_var(fname, ncid, 'slat', nf_float, 1, dids(2), slat_id) call nfw_def_var(fname, ncid, 'sdepth', nf_float, 1, dids(2), sdepth_id) call nfw_def_var(fname, ncid, 'sipiv', nf_int, 1, dids(2), sipiv_id) call nfw_def_var(fname, ncid, 'sjpiv', nf_int, 1, dids(2), sjpiv_id) call nfw_def_var(fname, ncid, 'sd', nf_float, 1, dids(2), sd_id) call nfw_def_var(fname, ncid, 'svar', nf_float, 1, dids(2), svar_id) end if if (.not. nfw_var_exists(ncid, 'innovation')) then call nfw_def_var(fname, ncid, 'innovation', nf_double, 1, dids(2), inn_id) else call nfw_inq_varid(fname, ncid, 'innovation', inn_id) end if if (.not. nfw_var_exists(ncid, 'forecast')) then call nfw_def_var(fname, ncid, 'forecast', nf_double, 1, dids(2), for_id) else call nfw_inq_varid(fname, ncid, 'forecast', for_id) end if if (.not. nfw_var_exists(ncid, 'forecast_variance')) then call nfw_def_var(fname, ncid, 'forecast_variance', nf_double, 1, dids(2), forvar_id) else call nfw_inq_varid(fname, ncid, 'forecast_variance', forvar_id) end if if (.not. addsobs) then if (dimlen == p) then if (.not. nfw_var_exists(ncid, 'new_var')) then call nfw_def_var(fname, ncid, 'new_var', nf_double, 1, dids(2), newvar_id) else call nfw_inq_varid(fname, ncid, 'new_var', newvar_id) end if else if (.not. nfw_var_exists(ncid, 'new_svar')) then call nfw_inq_dimid(fname, ncid, 'nsobs', dids(2)) call nfw_def_var(fname, ncid, 'new_svar', nf_double, 1, dids(2), newvar_id) else call nfw_inq_varid(fname, ncid, 'new_svar', newvar_id) end if end if end if call nfw_enddef(fname, ncid) call nfw_put_var_double(fname, ncid, forvar_id, Svar) call nfw_put_var_double(fname, ncid, for_id, x) call nfw_put_var_double(fname, ncid, inn_id, innovation) if (addsobs) then call nfw_put_var_double(fname, ncid, slon_id, obs % lon) call nfw_put_var_double(fname, ncid, slat_id, obs % lat) call nfw_put_var_double(fname, ncid, sdepth_id, obs % depth) call nfw_put_var_int(fname, ncid, sipiv_id, obs % ipiv) call nfw_put_var_int(fname, ncid, sjpiv_id, obs % jpiv) call nfw_put_var_double(fname, ncid, sd_id, obs % d) call nfw_put_var_double(fname, ncid, svar_id, obs % var) else call nfw_put_var_double(fname, ncid, newvar_id, obs % var) end if call nfw_close(fname, ncid) deallocate(x) deallocate(Svar) deallocate(innovation) end subroutine add_forecast end module m_prep_4_EnKF