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Adding code to analyze the siginificant wave heigh in GSI 3D Analysis (see issue #601) #614

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merged 12 commits into from
Sep 29, 2023
Merged

Adding code to analyze the siginificant wave heigh in GSI 3D Analysis (see issue #601) #614

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e117611
Adding code to analyze the siginificant wave heigh in GSI 3D Analysis,
GangZhao-NOAA Aug 22, 2023
8fd2251
Merge branch 'develop' into feature/3drtma_howv
GangZhao-NOAA Sep 1, 2023
f603756
some modifications to the code of analysis of significant wave height
GangZhao-NOAA Sep 13, 2023
8020227
Merge remote-tracking branch 'upstream/develop' into feature/3drtma_howv
GangZhao-NOAA Sep 13, 2023
8432590
based on feedback from code reviewers, modified the code of analysis
GangZhao-NOAA Sep 14, 2023
f3db06b
Merge branch 'develop' into feature/3drtma_howv
GangZhao-NOAA Sep 14, 2023
67b02a9
Minor modification in src/gsi/gsi_rfv3io_mod.f90 for reading howv in
GangZhao-NOAA Sep 15, 2023
1a4bab4
Merge remote-tracking branch 'upstream/develop' into feature/3drtma_howv
GangZhao-NOAA Sep 21, 2023
aa08628
minor modifications for analysis of significant wave height based on
GangZhao-NOAA Sep 21, 2023
7888831
trivial modification (fixing a typo)
GangZhao-NOAA Sep 21, 2023
99dd00a
Merge remote-tracking branch 'upstream/develop' into feature/3drtma_howv
GangZhao-NOAA Sep 26, 2023
f6031bd
minor modifications based on the feedback from code reviewers on the
GangZhao-NOAA Sep 26, 2023
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78 changes: 71 additions & 7 deletions src/gsi/gsi_rfv3io_mod.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,8 @@ module gsi_rfv3io_mod
! used as background for surface observation operator
! 2022-04-15 Wang - add IO for regional FV3-CMAQ (RRFS-CMAQ) model
! 2022-08-10 Wang - add IO for regional FV3-SMOKE (RRFS-SMOKE) model
! 2023-07-30 Zhao - add IO for the analysis of the significant wave height
! (SWH, aka howv in GSI) in fv3-lam based DA (eg., RRFS-3DRTMA)
!
! subroutines included:
! sub gsi_rfv3io_get_grid_specs
Expand Down Expand Up @@ -56,6 +58,7 @@ module gsi_rfv3io_mod
use rapidrefresh_cldsurf_mod, only: i_use_2mq4b,i_use_2mt4b
use chemmod, only: naero_cmaq_fv3,aeronames_cmaq_fv3,imodes_cmaq_fv3,laeroana_fv3cmaq
use chemmod, only: naero_smoke_fv3,aeronames_smoke_fv3,laeroana_fv3smoke
use rapidrefresh_cldsurf_mod, only: i_howv_3dda

implicit none
public type_fv3regfilenameg
Expand Down Expand Up @@ -133,7 +136,7 @@ module gsi_rfv3io_mod
public :: mype_u,mype_v,mype_t,mype_q,mype_p,mype_oz,mype_ql
public :: mype_qi,mype_qr,mype_qs,mype_qg,mype_qnr,mype_w
public :: k_slmsk,k_tsea,k_vfrac,k_vtype,k_stype,k_zorl,k_smc,k_stc
public :: k_snwdph,k_f10m,mype_2d,n2d,k_orog,k_psfc,k_t2m,k_q2m
public :: k_snwdph,k_f10m,mype_2d,n2d,k_orog,k_psfc,k_t2m,k_q2m,k_howv
public :: ijns,ijns2d,displss,displss2d,ijnz,displsz_g
public :: fv3lam_io_dynmetvars3d_nouv,fv3lam_io_tracermetvars3d_nouv
public :: fv3lam_io_tracerchemvars3d_nouv,fv3lam_io_tracersmokevars3d_nouv
Expand All @@ -144,7 +147,7 @@ module gsi_rfv3io_mod
integer(i_kind) mype_qi,mype_qr,mype_qs,mype_qg,mype_qnr,mype_w

integer(i_kind) k_slmsk,k_tsea,k_vfrac,k_vtype,k_stype,k_zorl,k_smc,k_stc
integer(i_kind) k_snwdph,k_f10m,mype_2d,n2d,k_orog,k_psfc,k_t2m,k_q2m
integer(i_kind) k_snwdph,k_f10m,mype_2d,n2d,k_orog,k_psfc,k_t2m,k_q2m,k_howv
parameter( &
k_f10m =1, & !fact10
k_stype=2, & !soil_type
Expand All @@ -159,7 +162,8 @@ module gsi_rfv3io_mod
k_t2m =11, & ! 2 m T
k_q2m =12, & ! 2 m Q
k_orog =13, & !terrain
n2d=13 )
k_howv =14, & ! significant wave height (aka howv in GSI)
n2d=14 )
logical :: grid_reverse_flag
character(len=max_varname_length),allocatable,dimension(:) :: fv3lam_io_dynmetvars3d_nouv
! copy of cvars3d excluding uv 3-d fields
Expand Down Expand Up @@ -767,6 +771,8 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
! 2022-04-01 Y. Wang and X. Wang - add capability to read reflectivity
! for direct radar EnVar DA using reflectivity as state
! variable, poc: xuguang.wang@ou.edu
! 2023-07-30 Zhao - added code to read significant wave height (howv) field
! from the 2D fv3-lam firstguess file (fv3_sfcdata).
! attributes:
! language: f90
! machine: ibm RS/6000 SP
Expand Down Expand Up @@ -816,6 +822,7 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
real(r_kind),pointer,dimension(:,:,:):: ges_delp =>NULL()
real(r_kind),dimension(:,:),pointer::ges_t2m=>NULL()
real(r_kind),dimension(:,:),pointer::ges_q2m=>NULL()
real(r_kind),dimension(:,:),pointer::ges_howv=>NULL()

real(r_kind),dimension(:,:,:),pointer::ges_ql=>NULL()
real(r_kind),dimension(:,:,:),pointer::ges_qi=>NULL()
Expand Down Expand Up @@ -1093,6 +1100,7 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
if(mype == 0) write(6,*)'the metvarname ',trim(vartem),' will be dealt separately'
else if(trim(vartem)=='t2m') then
else if(trim(vartem)=='q2m') then
else if(trim(vartem)=='howv') then
else
write(6,*)'the metvarname2 ',trim(vartem),' has not been considered yet, stop'
call stop2(333)
Expand All @@ -1110,7 +1118,8 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
do i=1,size(name_metvars2d)
vartem=trim(name_metvars2d(i))
if(.not.( (trim(vartem)=='ps'.and.fv3sar_bg_opt==0).or.(trim(vartem)=="z") &
.or.(trim(vartem)=="t2m").or.(trim(vartem)=="q2m"))) then !z is treated separately
.or.(trim(vartem)=="t2m").or.(trim(vartem)=="q2m") &
.or.(trim(vartem)=="howv"))) then ! z is treated separately
if (ifindstrloc(vardynvars,trim(vartem)) > 0) then
jdynvar=jdynvar+1
fv3lam_io_dynmetvars2d_nouv(jdynvar)=trim(vartem)
Expand Down Expand Up @@ -1365,6 +1374,13 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
call GSI_BundleGetPointer ( GSI_MetGuess_Bundle(it),'t2m',ges_t2m,istatus );ier=ier+istatus
if (ier/=0) call die(trim(myname),'cannot get pointers for t2m,ier=',ier)
endif

!--- significant wave height (howv)
if ( i_howv_3dda == 1 ) then
call GSI_BundleGetPointer(GSI_MetGuess_Bundle(it),'howv',ges_howv,istatus ); ier=ier+istatus
if (ier/=0) call die(trim(myname),'cannot get pointers for howv, ier=',ier)
endif
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if(mype == 0 ) then
call check(nf90_open(fv3filenamegin(it)%dynvars,nf90_nowrite,loc_id))
call check(nf90_inquire(loc_id,formatNum=ncfmt))
Expand Down Expand Up @@ -1546,7 +1562,7 @@ subroutine read_fv3_netcdf_guess(fv3filenamegin)
endif


call gsi_fv3ncdf2d_read(fv3filenamegin(it),it,ges_z,ges_t2m,ges_q2m)
call gsi_fv3ncdf2d_read(fv3filenamegin(it),it,ges_z,ges_t2m,ges_q2m,ges_howv)

if(i_use_2mq4b > 0 .and. i_use_2mt4b > 0 ) then
! Convert 2m guess mixing ratio to specific humidity
Expand Down Expand Up @@ -1782,7 +1798,7 @@ end subroutine gsi_bundlegetpointer_fv3lam_tracerchem_nouv

end subroutine read_fv3_netcdf_guess

subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m,ges_howv)
!$$$ subprogram documentation block
! . . . .
! subprogram: gsi_fv3ncdf2d_read
Expand All @@ -1792,6 +1808,8 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
! Scatter the field to each PE
! program history log:
! 2023-02-14 Hu - Bug fix for read in subdomain surface restart files
! 2023-07-30 Zhao - added IO to read significant wave height (howv) from 2D FV3-LAM
! firstguess file (fv3_sfcdata)
!
! input argument list:
! it - time index for 2d fields
Expand All @@ -1805,23 +1823,28 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
!
!$$$ end documentation block
use kinds, only: r_kind,i_kind
use mpimod, only: ierror,mpi_comm_world,npe,mpi_rtype,mype
use mpimod, only: ierror,mpi_comm_world,npe,mpi_rtype,mype,mpi_itype
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use mpeu_util, only: die
use guess_grids, only: fact10,soil_type,veg_frac,veg_type,sfc_rough, &
sfct,sno,soil_temp,soil_moi,isli
use gridmod, only: lat2,lon2,itotsub,ijn_s
use general_commvars_mod, only: ltosi_s,ltosj_s
use netcdf, only: nf90_open,nf90_close,nf90_get_var,nf90_noerr
use netcdf, only: nf90_nowrite,nf90_inquire,nf90_inquire_dimension
use netcdf, only: nf90_inquire_variable
use netcdf, only: nf90_inq_varid
use netcdf, only: nf90_noerr
use mod_fv3_lola, only: fv3_h_to_ll,nxa,nya
use constants, only: grav
use constants, only: zero

implicit none

integer(i_kind),intent(in) :: it
real(r_kind),intent(in),dimension(:,:),pointer::ges_z
real(r_kind),intent(in),dimension(:,:),pointer::ges_t2m
real(r_kind),intent(in),dimension(:,:),pointer::ges_q2m
real(r_kind),intent(in),dimension(:,:),pointer::ges_howv
type (type_fv3regfilenameg),intent(in) :: fv3filenamegin
character(len=max_varname_length) :: name
integer(i_kind),allocatable,dimension(:):: dim
Expand All @@ -1835,6 +1858,9 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
integer(i_kind) kk,n,ns,j,ii,jj,mm1
character(len=:),allocatable :: sfcdata !='fv3_sfcdata'
character(len=:),allocatable :: dynvars !='fv3_dynvars'
! for checking the existence of howv in firstguess file
integer(i_kind) id_howv
integer(i_kind) iret_bcast

! for io_layout > 1
real(r_kind),allocatable,dimension(:,:):: sfc_fulldomain
Expand All @@ -1850,6 +1876,9 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
allocate(work(itotsub*n2d))
allocate( sfcn2d(lat2,lon2,n2d))

!-- initialisation of the array for howv
sfcn2d(:,:,k_howv) = zero

if(mype==mype_2d ) then
allocate(sfc_fulldomain(nx,ny))

Expand Down Expand Up @@ -1877,6 +1906,24 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
iret=nf90_inquire_dimension(gfile_loc,k,name,len)
dim(k)=len
enddo

!--- check the existence of significant wave height (howv) in 2D FV3-LAM firstguess file
! if howv is set in anavinfo (as i_howv_3dda=1), then check its existence in firstguess,
! but if it is not found in firstguess, then stop GSI run and set i_howv_3dda = 0.
if ( i_howv_3dda == 1 ) then
iret = nf90_inq_varid(gfile_loc,'howv',id_howv)
if ( iret /= nf90_noerr ) then
iret = nf90_inq_varid(gfile_loc,'HOWV',id_howv) ! double check with name in uppercase
end if
if ( iret /= nf90_noerr ) then
i_howv_3dda = 0 ! howv does not exist in firstguess, then stop GSI run.
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Line 1919 is not needed as GSI dies immediately.

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@guoqing-noaa
I agree, since GSI is going to abort immediately in this case.
My thought about keeping this line (i_howv_3dda = 0) here, is to mark this event (howv is NOT in firstguess) and can be used later, if in the future some users, eg. NCO, would not like to stop the running of GSI just just due to missing of howv, setting i_howv_3dda = 0 will be useful. And keeping this line here does no harm to the efficiency and accuracy of code.
Thank you!

call die('gsi_fv3ncdf2d_read','Warning: CANNOT find howv in firstguess, aborting..., iret = ', iret)
else
write(6,'(1x,A,1x,A,1x,A,1x,I4,1x,I4,1x,A,1x,I4.4,A)') 'gsi_fv3ncdf2d_read:: Found howv in firstguess ', &
trim(sfcdata), ', iret, varid = ',iret, id_howv,' (on pe: ', mype,').'
end if
end if

!!!!!!!!!!!! read in 2d variables !!!!!!!!!!!!!!!!!!!!!!!!!!
do i=ndimensions+1,nvariables
iret=nf90_inquire_variable(gfile_loc,i,name,len)
Expand Down Expand Up @@ -1904,6 +1951,8 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
k=k_t2m
else if( trim(name)=='Q2M'.or.trim(name)=='q2m' ) then
k=k_q2m
else if( trim(name)=='HOWV'.or.trim(name)=='howv' ) then
k=k_howv
else
cycle
endif
Expand Down Expand Up @@ -2036,6 +2085,8 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
if(allocated(sfc_fulldomain)) deallocate (sfc_fulldomain)
endif ! mype

!-- broadcast the updated i_howv_3dda to all tasks (!!!!)
call mpi_bcast(i_howv_3dda, 1, mpi_itype, mype_2d, mpi_comm_world, iret_bcast)

!!!!!!! scatter !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call mpi_scatterv(work,ijns2d,displss2d,mpi_rtype,&
Expand All @@ -2058,6 +2109,9 @@ subroutine gsi_fv3ncdf2d_read(fv3filenamegin,it,ges_z,ges_t2m,ges_q2m)
ges_t2m(:,:)=sfcn2d(:,:,k_t2m)
ges_q2m(:,:)=sfcn2d(:,:,k_q2m)
endif
if ( i_howv_3dda == 1 ) then
ges_howv(:,:)=sfcn2d(:,:,k_howv)
endif
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deallocate (sfcn2d,a)
return
end subroutine gsi_fv3ncdf2d_read
Expand Down Expand Up @@ -3192,6 +3246,8 @@ subroutine wrfv3_netcdf(fv3filenamegin)
! 2019-11-22 CAPS(C. Tong) - modify "add_saved" to properly output analyses
! 2021-01-05 x.zhang/lei - add code for updating delz analysis in regional da
! 2022-04-01 Y. Wang and X. Wang - add code for updating reflectivity
! 2023-07-30 Zhao - added code for the output of the analysis of
! significant wave height (howv)
!
! input argument list:
!
Expand Down Expand Up @@ -3234,6 +3290,7 @@ subroutine wrfv3_netcdf(fv3filenamegin)
real(r_kind),pointer,dimension(:,:,:):: ges_q =>NULL()
real(r_kind),pointer,dimension(:,: ):: ges_t2m =>NULL()
real(r_kind),pointer,dimension(:,: ):: ges_q2m =>NULL()
real(r_kind),pointer,dimension(:,: ):: ges_howv =>NULL()

integer(i_kind) i,k

Expand Down Expand Up @@ -3350,6 +3407,9 @@ subroutine wrfv3_netcdf(fv3filenamegin)
call GSI_BundleGetPointer (GSI_MetGuess_Bundle(it),'q2m',ges_q2m,istatus); ier=ier+istatus
call GSI_BundleGetPointer (GSI_MetGuess_Bundle(it),'t2m',ges_t2m,istatus );ier=ier+istatus
endif
if ( i_howv_3dda == 1 ) then
call GSI_BundleGetPointer (GSI_MetGuess_Bundle(it),'howv',ges_howv,istatus); ier=ier+istatus
endif
if (ier/=0) call die('wrfv3_netcdf','cannot get pointers for fv3 met-fields, ier =',ier)

if (laeroana_fv3cmaq) then
Expand Down Expand Up @@ -3559,6 +3619,10 @@ subroutine wrfv3_netcdf(fv3filenamegin)
call gsi_fv3ncdf_write_sfc(fv3filenamegin,'t2m',ges_t2m,add_saved)
call gsi_fv3ncdf_write_sfc(fv3filenamegin,'q2m',ges_q2m,add_saved)
endif
!-- output analysis of howv
if ( i_howv_3dda == 1 ) then
call gsi_fv3ncdf_write_sfc(fv3filenamegin,'howv',ges_howv,add_saved)
endif

if(allocated(g_prsi)) deallocate(g_prsi)

Expand Down
13 changes: 11 additions & 2 deletions src/gsi/gsimod.F90
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Expand Up @@ -176,7 +176,8 @@ module gsimod
i_coastline,i_gsdqc,qv_max_inc,ioption,l_precip_clear_only,l_fog_off,&
cld_bld_coverage,cld_clr_coverage,&
i_cloud_q_innovation,i_ens_mean,DTsTmax,&
i_T_Q_adjust,l_saturate_bkCloud,l_rtma3d,i_precip_vertical_check
i_T_Q_adjust,l_saturate_bkCloud,l_rtma3d,i_precip_vertical_check, &
corp_howv, hwllp_howv
use gsi_metguess_mod, only: gsi_metguess_init,gsi_metguess_final
use gsi_chemguess_mod, only: gsi_chemguess_init,gsi_chemguess_final
use tcv_mod, only: init_tcps_errvals,tcp_refps,tcp_width,tcp_ermin,tcp_ermax
Expand Down Expand Up @@ -503,6 +504,9 @@ module gsimod
! 3. fv3_cmaq_regional = .true.
! 4. berror_fv3_cmaq_regional = .true.
! 09-15-2022 yokota - add scale/variable/time-dependent localization
! 2023-07-30 Zhao - added namelist options for analysis of significant wave height
! (aka howv in GSI code): corp_howv, hwllp_howv
! (in namelist session rapidrefresh_cldsurf)
!
!EOP
!-------------------------------------------------------------------------
Expand Down Expand Up @@ -1560,6 +1564,10 @@ module gsimod
! = 2(clean Qg as in 1, and adjustment to the retrieved Qr/Qs/Qnr throughout the whole profile)
! = 3(similar to 2, but adjustment to Qr/Qs/Qnr only below maximum reflectivity level
! and where the dbz_obs is missing);
! corp_howv - real, static background error of howv (stddev error)
! = 0.42 meters (default)
! hwllp_howv - real, background error de-correlation length scale of howv
! = 170,000.0 meters (default 170 km)
!
namelist/rapidrefresh_cldsurf/dfi_radar_latent_heat_time_period, &
metar_impact_radius,metar_impact_radius_lowcloud, &
Expand All @@ -1580,7 +1588,8 @@ module gsimod
i_coastline,i_gsdqc,qv_max_inc,ioption,l_precip_clear_only,l_fog_off,&
cld_bld_coverage,cld_clr_coverage,&
i_cloud_q_innovation,i_ens_mean,DTsTmax, &
i_T_Q_adjust,l_saturate_bkCloud,l_rtma3d,i_precip_vertical_check
i_T_Q_adjust,l_saturate_bkCloud,l_rtma3d,i_precip_vertical_check, &
corp_howv, hwllp_howv

! chem(options for gsi chem analysis) :
! berror_chem - .true. when background for chemical species that require
Expand Down
41 changes: 31 additions & 10 deletions src/gsi/m_berror_stats_reg.f90
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Expand Up @@ -870,16 +870,17 @@ subroutine berror_read_wgt_reg(msig,mlat,corz,corp,hwll,hwllp,vz,rlsig,varq,qopt
hwllp(i,n)=hwllp(i,nrf2_ps)
end do
else if (n==nrf2_howv) then
call read_howv_stats(mlat,1,2,cov_dum)
call read_howv_stats(mlat,1,2,cov_dum,mype)
do i=1,mlat
corp(i,n)=cov_dum(i,1,1) !#ww3
hwllp(i,n) = cov_dum(i,1,2)
end do
hwllp(0,n) = hwllp(1,n)
hwllp(mlat+1,n) = hwllp(mlat,n)

if (mype==0) print*, 'corp(i,n) = ', corp(:,n)
if (mype==0) print*, ' hwllp(i,n) = ', hwllp(:,n)
if (mype==0) then
print*, myname_, ' static BE corp( :,n) (for ', trim(adjustl(cvars2d(n))), ')= ', corp(:,n)
print*, myname_, ' static BE hwllp(:,n) (for ', trim(adjustl(cvars2d(n))), ')= ', hwllp(:,n)
end if
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! corp(:,n)=cov_dum(:,1)
!do i=1,mlat
! corp(i,n)=0.4_r_kind !#ww3
Expand Down Expand Up @@ -1055,7 +1056,7 @@ subroutine berror_read_wgt_reg(msig,mlat,corz,corp,hwll,hwllp,vz,rlsig,varq,qopt
end subroutine berror_read_wgt_reg

!++++
subroutine read_howv_stats(nlat,nlon,npar,arrout)
subroutine read_howv_stats(nlat,nlon,npar,arrout,mype)
!$$$ subprogram documentation block
! . . . .
! subprogram: read_howv_stats
Expand Down Expand Up @@ -1090,6 +1091,9 @@ subroutine read_howv_stats(nlat,nlon,npar,arrout)
! program history log:
! 2016-08-03 stelios
! 2016-08-26 stelios : Compatible with GSI.
! 2023-07-30 Zhao - added code to set the background error
! standard deviation (corp_howv) and de-correlation
! length scale (hwllp_howv) for non-2DRTMA run
! input argument list:
! filename - The name of the file
! output argument list:
Expand All @@ -1102,10 +1106,14 @@ subroutine read_howv_stats(nlat,nlon,npar,arrout)
!$$$ end documentation block
!
use kinds,only : r_kind, i_kind
use gridmod, only : twodvar_regional
use rapidrefresh_cldsurf_mod, only : corp_howv, hwllp_howv
use gsi_io, only : verbose
!
implicit none
! Declare passed variables
integer(i_kind), intent(in )::nlat,nlon,npar
integer(i_kind), intent(in ) :: mype ! "my" processor ID
real(r_kind), dimension(nlat ,nlon, npar), intent( out)::arrout
! Declare local variables
integer(i_kind) :: reclength,i,j,i_npar
Expand All @@ -1117,12 +1125,18 @@ subroutine read_howv_stats(nlat,nlon,npar,arrout)
!
filename(1) = 'howv_var_berr.bin'
filename(2) = 'howv_lng_berr.bin'
!
arrout(:,:,1)=0.42_r_kind
arrout(:,:,2)=50000.0_r_kind
!-- first, assign the pre-defined values to corp and hwllp
if ( twodvar_regional ) then
arrout(:,:,1)=0.42_r_kind ! values were specified by Manuel and Stelio for 2DRTMA
arrout(:,:,2)=50000.0_r_kind ! values were specified by Manuel and Stelio for 2DRTMA
else
arrout(:,:,1) = corp_howv ! 0.42_r_kind used in 3dvar (default) if not set in namelist
arrout(:,:,2) = hwllp_howv ! 17000.0_r_kind used in 3dvar (default) if not set in namelist
end if

reclength=nlat*r_kind
!
!-- secondly, if files for corp and hwllp are available, then read them in for
! corp and hwllp. If the files are not found, then use the pre-defined values.
do i_npar = 1,npar
inquire(file=trim(filename(i_npar)), exist=file_exists)
if (file_exists)then
Expand All @@ -1132,9 +1146,16 @@ subroutine read_howv_stats(nlat,nlon,npar,arrout)
read(unit=lun34 ,rec=j) (arrout(i,j,i_npar), i=1,nlat)
enddo
close(unit=lun34)
if (verbose .and. mype .eq. 0) then
write(6,'(1x,A,1x,A2,1x,A)') trim(adjustl(myname)), '::', &
trim(filename(i_npar))//' is used for background error of howv.'
end if

else
print*,myname, trim(filename(i_npar)) // ' does not exist'
if (verbose .and. mype .eq. 0) then
write(6,'(1x,A,1x,A2,1x,A)') trim(adjustl(myname)), '::', &
trim(filename(i_npar))//' does not exist for static BE of howv, using pre-defined values.'
end if
end if
end do
end subroutine read_howv_stats
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