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MODULE icedia
!!======================================================================
!! *** MODULE icedia ***
!! Sea-Ice: global budgets
!!======================================================================
!! History : 3.4 ! 2012-10 (C. Rousset) original code
!! 4.0 ! 2018 (many people) SI3 [aka Sea Ice cube]
!!----------------------------------------------------------------------
#if defined key_si3
!!----------------------------------------------------------------------
!! 'key_si3' SI3 sea-ice model
!!----------------------------------------------------------------------
!! ice_dia : diagnostic of the sea-ice global heat content, salt content and volume conservation
!! ice_dia_init : initialization of budget calculation
!! ice_dia_rst : read/write budgets restart
!!----------------------------------------------------------------------
USE dom_oce ! ocean domain
USE phycst ! physical constant
USE daymod ! model calendar
USE sbc_oce , ONLY : sfx, nn_fsbc ! surface boundary condition: ocean fields
USE ice ! sea-ice: variables
USE icerst ! sea-ice: restart
!
USE in_out_manager ! I/O manager
USE iom ! I/O manager library
USE lib_mpp ! MPP library
USE lib_fortran ! fortran utilities (glob_sum + no signed zero)
USE timing ! Timing
IMPLICIT NONE
PRIVATE
PUBLIC ice_dia ! called by icestp.F90
PUBLIC ice_dia_init ! called in icestp.F90
Clement Rousset
committed
REAL(wp), SAVE :: r1_area ! inverse of the ocean area
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REAL(wp), DIMENSION(:,:), ALLOCATABLE :: vol_loc_ini, sal_loc_ini, tem_loc_ini ! initial volume, salt and heat contents
REAL(wp) :: frc_sal, frc_voltop, frc_volbot, frc_temtop, frc_tembot ! global forcing trends
!!----------------------------------------------------------------------
!! NEMO/ICE 4.0 , NEMO Consortium (2018)
!! $Id: icedia.F90 15048 2021-06-23 16:02:14Z clem $
!! Software governed by the CeCILL license (see ./LICENSE)
!!----------------------------------------------------------------------
CONTAINS
INTEGER FUNCTION ice_dia_alloc()
!!---------------------------------------------------------------------!
!! *** ROUTINE ice_dia_alloc ***
!!---------------------------------------------------------------------!
ALLOCATE( vol_loc_ini(jpi,jpj), sal_loc_ini(jpi,jpj), tem_loc_ini(jpi,jpj), STAT=ice_dia_alloc )
CALL mpp_sum ( 'icedia', ice_dia_alloc )
IF( ice_dia_alloc /= 0 ) CALL ctl_stop( 'STOP', 'ice_dia_alloc: failed to allocate arrays' )
!
END FUNCTION ice_dia_alloc
SUBROUTINE ice_dia( kt )
!!---------------------------------------------------------------------------
!! *** ROUTINE ice_dia ***
!!
!! ** Purpose: Compute the sea-ice global heat content, salt content
!! and volume conservation
!!---------------------------------------------------------------------------
INTEGER, INTENT(in) :: kt ! ocean time step
!!
REAL(wp), DIMENSION(jpi,jpj,16) :: ztmp
REAL(wp), DIMENSION(16) :: zbg
!!---------------------------------------------------------------------------
IF( ln_timing ) CALL timing_start('ice_dia')
IF( kt == nit000 .AND. lwp ) THEN
WRITE(numout,*)
WRITE(numout,*)'icedia: output ice diagnostics (integrated over the domain)'
WRITE(numout,*)'~~~~~~'
ENDIF
IF( kt == nit000 ) THEN
Clement Rousset
committed
r1_area = 1._wp / glob_sum( 'icedia', e1e2t(:,:) )
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ENDIF
ztmp(:,:,:) = 0._wp ! should be better coded
! ---------------------------!
! 1 - Trends due to forcing !
! ---------------------------!
! they must be kept outside an IF(iom_use) because of the call to dia_rst below
ztmp(:,:,1) = - ( wfx_ice(:,:) + wfx_snw(:,:) + wfx_err_sub(:,:) ) * e1e2t(:,:) ! freshwater flux ice/snow-ocean
ztmp(:,:,2) = - ( wfx_sub(:,:) + wfx_spr(:,:) ) * e1e2t(:,:) ! freshwater flux ice/snow-atm
ztmp(:,:,3) = - sfx (:,:) * e1e2t(:,:) ! salt fluxes ice/snow-ocean
ztmp(:,:,4) = qt_atm_oi(:,:) * e1e2t(:,:) ! heat on top of ice-ocean
ztmp(:,:,5) = qt_oce_ai(:,:) * e1e2t(:,:) ! heat on top of ocean (and below ice)
! ----------------------- !
! 2 - Contents !
! ----------------------- !
IF( iom_use('ibgvol_tot' ) ) ztmp(:,:,6 ) = vt_i (:,:) * e1e2t(:,:) ! ice volume
IF( iom_use('sbgvol_tot' ) ) ztmp(:,:,7 ) = vt_s (:,:) * e1e2t(:,:) ! snow volume
IF( iom_use('ibgarea_tot') ) ztmp(:,:,8 ) = at_i (:,:) * e1e2t(:,:) ! area
IF( iom_use('ibgsalt_tot') ) ztmp(:,:,9 ) = st_i (:,:) * e1e2t(:,:) ! salt content
IF( iom_use('ibgheat_tot') ) ztmp(:,:,10) = et_i (:,:) * e1e2t(:,:) ! heat content
IF( iom_use('sbgheat_tot') ) ztmp(:,:,11) = et_s (:,:) * e1e2t(:,:) ! heat content
IF( iom_use('ipbgvol_tot') ) ztmp(:,:,12) = vt_ip(:,:) * e1e2t(:,:) ! ice pond volume
IF( iom_use('ilbgvol_tot') ) ztmp(:,:,13) = vt_il(:,:) * e1e2t(:,:) ! ice pond lid volume
! ---------------------------------- !
! 3 - Content variations and drifts !
! ---------------------------------- !
IF( iom_use('ibgvolume') ) ztmp(:,:,14) = ( rhoi*vt_i(:,:) + rhos*vt_s(:,:) - vol_loc_ini(:,:) ) * e1e2t(:,:) ! freshwater trend
IF( iom_use('ibgsaltco') ) ztmp(:,:,15) = ( rhoi*st_i(:,:) - sal_loc_ini(:,:) ) * e1e2t(:,:) ! salt content trend
IF( iom_use('ibgheatco') .OR. iom_use('ibgheatfx') ) &
& ztmp(:,:,16) = ( et_i(:,:) + et_s(:,:) - tem_loc_ini(:,:) ) * e1e2t(:,:) ! heat content trend
! global sum
zbg(1:16) = glob_sum_vec( 'icedia', ztmp(:,:,1:16) )
! change units for trends
zbg(1) = zbg(1) * r1_rho0 * 1.e-9 * rDt_ice ! freshwater flux ice/snow-ocean (km3)
zbg(2) = zbg(2) * r1_rho0 * 1.e-9 * rDt_ice ! freshwater flux ice/snow-atm (km3)
zbg(3) = zbg(3) * r1_rho0 * 1.e-9 * rDt_ice ! salt fluxes ice/snow-ocean (km3*pss)
zbg(4) = zbg(4) * 1.e-20 * rDt_ice ! heat on top of ice-ocean (1.e20 J)
zbg(5) = zbg(5) * 1.e-20 * rDt_ice ! heat on top of ocean (and below ice) (1.e20 J)
! cumulative sum
frc_voltop = frc_voltop + zbg(1)
frc_volbot = frc_volbot + zbg(2)
frc_sal = frc_sal + zbg(3)
frc_temtop = frc_temtop + zbg(4)
frc_tembot = frc_tembot + zbg(5)
! change units for contents
zbg(6) = zbg(6) * 1.e-9 ! ice volume (km3)
zbg(7) = zbg(7) * 1.e-9 ! snw volume (km3)
zbg(8) = zbg(8) * 1.e-6 ! ice area (km2)
zbg(9) = zbg(9) * 1.e-9 ! salt content (km3*pss)
zbg(10) = zbg(10) * 1.e-20 ! ice heat content (1.e20 J)
zbg(11) = zbg(11) * 1.e-20 ! snw heat content (1.e20 J)
zbg(12) = zbg(12) * 1.e-9 ! pnd volume (km3)
zbg(13) = zbg(13) * 1.e-9 ! pnd lid volume (km3)
! change units for trends
zbg(14) = zbg(14) * r1_rho0 * 1.e-9 ! freshwater trend (km3)
zbg(15) = zbg(15) * r1_rho0 * 1.e-9 ! salt content trend (km3*pss)
zbg(16) = zbg(16) * 1.e-20 ! heat content trend (1.e20 J)
! difference
zbg(14) = zbg(14) - ( frc_voltop + frc_volbot )
zbg(15) = zbg(15) - frc_sal
zbg(16) = zbg(16) - ( frc_tembot - frc_temtop )
! outputs
CALL iom_put( 'ibgfrcvoltop' , frc_voltop ) ! vol forcing ice/snw-atm (km3 equivalent ocean water)
CALL iom_put( 'ibgfrcvolbot' , frc_volbot ) ! vol forcing ice/snw-ocean (km3 equivalent ocean water)
CALL iom_put( 'ibgfrcsal' , frc_sal ) ! sal forcing (psu*km3 equivalent ocean water)
CALL iom_put( 'ibgfrctemtop' , frc_temtop ) ! heat on top of ice/snw/ocean (1.e20 J)
CALL iom_put( 'ibgfrctembot' , frc_tembot ) ! heat on top of ocean(below ice) (1.e20 J)
Clement Rousset
committed
CALL iom_put( 'ibgfrchfxtop' , frc_temtop * r1_area * 1.e-20 * kt*rn_Dt ) ! heat on top of ice/snw/ocean (W/m2)
CALL iom_put( 'ibgfrchfxbot' , frc_tembot * r1_area * 1.e-20 * kt*rn_Dt ) ! heat on top of ocean(below ice) (W/m2)
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CALL iom_put( 'ibgvol_tot' , zbg(6) )
CALL iom_put( 'sbgvol_tot' , zbg(7) )
CALL iom_put( 'ibgarea_tot' , zbg(8) )
CALL iom_put( 'ibgsalt_tot' , zbg(9) )
CALL iom_put( 'ibgheat_tot' , zbg(10) )
CALL iom_put( 'sbgheat_tot' , zbg(11) )
CALL iom_put( 'ipbgvol_tot' , zbg(12) )
CALL iom_put( 'ilbgvol_tot' , zbg(13) )
CALL iom_put( 'ibgvolume' , zbg(14) ) ! ice/snow volume drift (km3 equivalent ocean water)
CALL iom_put( 'ibgsaltco' , zbg(15) ) ! ice salt content drift (psu*km3 equivalent ocean water)
CALL iom_put( 'ibgheatco' , zbg(16) ) ! ice/snow heat content drift (1.e20 J)
!
! restarts
IF( lrst_ice ) CALL ice_dia_rst( 'WRITE', kt_ice )
!
IF( ln_timing ) CALL timing_stop('ice_dia')
!
END SUBROUTINE ice_dia
SUBROUTINE ice_dia_init
!!---------------------------------------------------------------------------
!! *** ROUTINE ice_dia_init ***
!!
!! ** Purpose: Initialization for the heat salt volume budgets
!!
!! ** Method : Compute initial heat content, salt content and volume
!!
!! ** Action : - Compute initial heat content, salt content and volume
!! - Initialize forcing trends
!! - Compute coefficients for conversion
!!---------------------------------------------------------------------------
INTEGER :: ios, ierror ! local integer
!!
NAMELIST/namdia/ ln_icediachk, rn_icechk_cel, rn_icechk_glo, ln_icediahsb, ln_icectl, iiceprt, jiceprt
!!----------------------------------------------------------------------
!
READ ( numnam_ice_ref, namdia, IOSTAT = ios, ERR = 901)
901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdia in reference namelist' )
READ ( numnam_ice_cfg, namdia, IOSTAT = ios, ERR = 902 )
902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namdia in configuration namelist' )
IF(lwm) WRITE ( numoni, namdia )
!
IF(lwp) THEN ! control print
WRITE(numout,*)
WRITE(numout,*) 'ice_dia_init: ice diagnostics'
WRITE(numout,*) ' ~~~~~~~~~~~'
WRITE(numout,*) ' Namelist namdia:'
WRITE(numout,*) ' Diagnose online heat/mass/salt conservation ln_icediachk = ', ln_icediachk
WRITE(numout,*) ' threshold for conservation (gridcell) rn_icechk_cel = ', rn_icechk_cel
WRITE(numout,*) ' threshold for conservation (global) rn_icechk_glo = ', rn_icechk_glo
WRITE(numout,*) ' Output heat/mass/salt budget ln_icediahsb = ', ln_icediahsb
WRITE(numout,*) ' control prints for a given grid point ln_icectl = ', ln_icectl
WRITE(numout,*) ' chosen grid point position (iiceprt,jiceprt) = (', iiceprt,',', jiceprt,')'
ENDIF
!
IF( ln_icediahsb ) THEN
IF( ice_dia_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'ice_dia_init : unable to allocate arrays' ) ! allocate tke arrays
CALL ice_dia_rst( 'READ' ) ! read or initialize all required files
ENDIF
!
END SUBROUTINE ice_dia_init
SUBROUTINE ice_dia_rst( cdrw, kt )
!!---------------------------------------------------------------------
!! *** ROUTINE icedia_rst ***
!!
!! ** Purpose : Read or write DIA file in restart file
!!
!! ** Method : use of IOM library
!!----------------------------------------------------------------------
CHARACTER(len=*) , INTENT(in) :: cdrw ! "READ"/"WRITE" flag
INTEGER, OPTIONAL, INTENT(in) :: kt ! ice time-step
!
INTEGER :: iter ! local integer
REAL(wp) :: ziter ! local scalar
!!----------------------------------------------------------------------
!
IF( TRIM(cdrw) == 'READ' ) THEN ! Read/initialise
IF( ln_rstart ) THEN !* Read the restart file
!
CALL iom_get( numrir, 'kt_ice' , ziter )
IF(lwp) WRITE(numout,*)
IF(lwp) WRITE(numout,*) 'ice_dia_rst read at time step = ', ziter
IF(lwp) WRITE(numout,*) '~~~~~~~~~~'
CALL iom_get( numrir, 'frc_voltop' , frc_voltop )
CALL iom_get( numrir, 'frc_volbot' , frc_volbot )
CALL iom_get( numrir, 'frc_temtop' , frc_temtop )
CALL iom_get( numrir, 'frc_tembot' , frc_tembot )
CALL iom_get( numrir, 'frc_sal' , frc_sal )
CALL iom_get( numrir, jpdom_auto, 'vol_loc_ini', vol_loc_ini )
CALL iom_get( numrir, jpdom_auto, 'tem_loc_ini', tem_loc_ini )
CALL iom_get( numrir, jpdom_auto, 'sal_loc_ini', sal_loc_ini )
ELSE
IF(lwp) WRITE(numout,*)
IF(lwp) WRITE(numout,*) ' ice_dia at initial state '
IF(lwp) WRITE(numout,*) '~~~~~~~'
! set trends to 0
frc_voltop = 0._wp
frc_volbot = 0._wp
frc_temtop = 0._wp
frc_tembot = 0._wp
frc_sal = 0._wp
! record initial ice volume, salt and temp
vol_loc_ini(:,:) = rhoi * vt_i(:,:) + rhos * vt_s(:,:) ! ice/snow volume (kg/m2)
tem_loc_ini(:,:) = et_i(:,:) + et_s(:,:) ! ice/snow heat content (J)
sal_loc_ini(:,:) = rhoi * st_i(:,:) ! ice salt content (pss*kg/m2)
ENDIF
!
ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN ! Create restart file
! ! -------------------
iter = kt + nn_fsbc - 1 ! ice restarts are written at kt == nitrst - nn_fsbc + 1
!
IF( iter == nitrst ) THEN
IF(lwp) WRITE(numout,*)
IF(lwp) WRITE(numout,*) 'ice_dia_rst write at time step = ', kt
IF(lwp) WRITE(numout,*) '~~~~~~~~~~~'
ENDIF
!
! Write in numriw (if iter == nitrst)
! ------------------
CALL iom_rstput( iter, nitrst, numriw, 'frc_voltop' , frc_voltop )
CALL iom_rstput( iter, nitrst, numriw, 'frc_volbot' , frc_volbot )
CALL iom_rstput( iter, nitrst, numriw, 'frc_temtop' , frc_temtop )
CALL iom_rstput( iter, nitrst, numriw, 'frc_tembot' , frc_tembot )
CALL iom_rstput( iter, nitrst, numriw, 'frc_sal' , frc_sal )
CALL iom_rstput( iter, nitrst, numriw, 'vol_loc_ini', vol_loc_ini )
CALL iom_rstput( iter, nitrst, numriw, 'tem_loc_ini', tem_loc_ini )
CALL iom_rstput( iter, nitrst, numriw, 'sal_loc_ini', sal_loc_ini )
!
ENDIF
!
END SUBROUTINE ice_dia_rst
#else
!!----------------------------------------------------------------------
!! Default option : Empty module NO SI3 sea-ice model
!!----------------------------------------------------------------------
#endif
!!======================================================================
END MODULE icedia