source: LMDZ5/trunk/libf/phylmd/surf_ocean_mod.F90 @ 2722

!
! $Id: surf_ocean_mod.F90 2719 2016-11-29 21:56:32Z fhourdin $
!
MODULE surf_ocean_mod

  IMPLICIT NONE

CONTAINS
!
!******************************************************************************
!
  SUBROUTINE surf_ocean(rlon, rlat, swnet, lwnet, alb1, &
       windsp, rmu0, fder, tsurf_in, &
       itime, dtime, jour, knon, knindex, &
       p1lay, z1lay, cdragh, cdragm, precip_rain, precip_snow, temp_air, spechum, &
       AcoefH, AcoefQ, BcoefH, BcoefQ, &
       AcoefU, AcoefV, BcoefU, BcoefV, &
       ps, u1, v1, gustiness, rugoro, pctsrf, &
       snow, qsurf, agesno, &
       z0m, z0h, SFRWL, alb_dir_new, alb_dif_new, evap, fluxsens, fluxlat, & 
       tsurf_new, dflux_s, dflux_l, lmt_bils, &
       flux_u1, flux_v1)

  use albedo, only: alboc, alboc_cd
  USE dimphy, ONLY: klon, zmasq
  USE surface_data, ONLY     : type_ocean
  USE ocean_forced_mod, ONLY : ocean_forced_noice
  USE ocean_slab_mod, ONLY   : ocean_slab_noice
  USE ocean_cpl_mod, ONLY    : ocean_cpl_noice
  USE indice_sol_mod, ONLY : nbsrf, is_oce
!
! This subroutine will make a call to ocean_XXX_noice according to the ocean mode (force, 
! slab or couple). The calculations of albedo and rugosity for the ocean surface are 
! done in here because they are identical for the different modes of ocean. 


    INCLUDE "YOMCST.h"

    include "clesphys.h"
    ! for cycle_diurne and for iflag_z0_oce==-1 (prescribed z0)

! Input variables
!******************************************************************************
    INTEGER, INTENT(IN)                      :: itime, jour, knon
    INTEGER, DIMENSION(klon), INTENT(IN)     :: knindex
    REAL, INTENT(IN)                         :: dtime
    REAL, DIMENSION(klon), INTENT(IN)        :: rlon, rlat
    REAL, DIMENSION(klon), INTENT(IN)        :: swnet  ! net shortwave radiation at surface  
    REAL, DIMENSION(klon), INTENT(IN)        :: lwnet  ! net longwave radiation at surface  
    REAL, DIMENSION(klon), INTENT(IN)        :: alb1   ! albedo in visible SW interval
    REAL, DIMENSION(klon), INTENT(IN)        :: windsp
    REAL, DIMENSION(klon), INTENT(IN)        :: rmu0  
    REAL, DIMENSION(klon), INTENT(IN)        :: fder
    REAL, DIMENSION(klon), INTENT(IN)        :: tsurf_in
    REAL, DIMENSION(klon), INTENT(IN)        :: p1lay,z1lay ! pression (Pa) et altitude (m) du premier niveau
    REAL, DIMENSION(klon), INTENT(IN)        :: cdragh
    REAL, DIMENSION(klon), INTENT(IN)        :: cdragm
    REAL, DIMENSION(klon), INTENT(IN)        :: precip_rain, precip_snow
    REAL, DIMENSION(klon), INTENT(IN)        :: temp_air, spechum
    REAL, DIMENSION(klon), INTENT(IN)        :: AcoefH, AcoefQ, BcoefH, BcoefQ
    REAL, DIMENSION(klon), INTENT(IN)        :: AcoefU, AcoefV, BcoefU, BcoefV
    REAL, DIMENSION(klon), INTENT(IN)        :: ps
    REAL, DIMENSION(klon), INTENT(IN)        :: u1, v1, gustiness
    REAL, DIMENSION(klon), INTENT(IN)        :: rugoro
    REAL, DIMENSION(klon,nbsrf), INTENT(IN)  :: pctsrf

! In/Output variables
!******************************************************************************
    REAL, DIMENSION(klon), INTENT(INOUT)     :: snow
    REAL, DIMENSION(klon), INTENT(INOUT)     :: qsurf
    REAL, DIMENSION(klon), INTENT(INOUT)     :: agesno

! Output variables
!******************************************************************************
    REAL, DIMENSION(klon), INTENT(OUT)       :: z0m, z0h
!albedo SB >>>
!    REAL, DIMENSION(klon), INTENT(OUT)       :: alb1_new  ! new albedo in visible SW interval
!    REAL, DIMENSION(klon), INTENT(OUT)       :: alb2_new  ! new albedo in near IR interval
    REAL, DIMENSION(6), INTENT(IN)          :: SFRWL 
    REAL, DIMENSION(klon,nsw), INTENT(OUT)       :: alb_dir_new,alb_dif_new
!albedo SB <<<     
    REAL, DIMENSION(klon), INTENT(OUT)       :: evap, fluxsens, fluxlat
    REAL, DIMENSION(klon), INTENT(OUT)       :: tsurf_new
    REAL, DIMENSION(klon), INTENT(OUT)       :: dflux_s, dflux_l      
    REAL, DIMENSION(klon), INTENT(OUT)       :: lmt_bils
    REAL, DIMENSION(klon), INTENT(OUT)       :: flux_u1, flux_v1

! Local variables
!******************************************************************************
    INTEGER               :: i, k
    REAL                  :: tmp
    REAL, PARAMETER       :: cepdu2=(0.1)**2
    REAL, DIMENSION(klon) :: alb_eau
    REAL, DIMENSION(klon) :: radsol
    REAL, DIMENSION(klon) :: cdragq ! Cdrag pour l'evaporation
    CHARACTER(len=20),PARAMETER :: modname="surf_ocean"

! End definition
!******************************************************************************


!******************************************************************************
! Calculate total net radiance at surface
!
!******************************************************************************
    radsol(1:klon) = 0.0 ! initialisation a priori inutile
    radsol(1:knon) = swnet(1:knon) + lwnet(1:knon)

!******************************************************************************
! Cdragq computed from cdrag
! The difference comes only from a factor (f_z0qh_oce) on z0, so that
! it can be computed inside surf_ocean
! More complicated appraches may require the propagation through
! pbl_surface of an independant cdragq variable.
!******************************************************************************

    IF ( f_z0qh_oce .ne. 1.) THEN
! Si on suit les formulations par exemple de Tessel, on 
! a z0h=0.4*nu/u*, z0q=0.62*nu/u*, d'ou f_z0qh_oce=0.62/0.4=1.55
       cdragq(1:knon)=cdragh(1:knon)*                                      &
       log(z1lay(1:knon)/z0h(1:knon))/log(z1lay(1:knon)/(f_z0qh_oce*z0h(1:knon)))
    ELSE
       cdragq(1:knon)=cdragh(1:knon)
    ENDIF

!******************************************************************************
! Switch according to type of ocean (couple, slab or forced)
!******************************************************************************
    SELECT CASE(type_ocean)
    CASE('couple')
       CALL ocean_cpl_noice( &
            swnet, lwnet, alb1, &
            windsp, fder, & 
            itime, dtime, knon, knindex, &
            p1lay, cdragh, cdragq, cdragm, precip_rain, precip_snow,temp_air,spechum,& 
            AcoefH, AcoefQ, BcoefH, BcoefQ, &
            AcoefU, AcoefV, BcoefU, BcoefV, &
            ps, u1, v1, gustiness, &
            radsol, snow, agesno, &
            qsurf, evap, fluxsens, fluxlat, flux_u1, flux_v1, &
            tsurf_new, dflux_s, dflux_l)

    CASE('slab')
       CALL ocean_slab_noice( &
            itime, dtime, jour, knon, knindex, &
            p1lay, cdragh, cdragq, cdragm, precip_rain, precip_snow, temp_air, spechum,&
            AcoefH, AcoefQ, BcoefH, BcoefQ, &
            AcoefU, AcoefV, BcoefU, BcoefV, &
            ps, u1, v1, gustiness, tsurf_in, &
            radsol, snow, &
            qsurf, evap, fluxsens, fluxlat, flux_u1, flux_v1, &
            tsurf_new, dflux_s, dflux_l, lmt_bils)
       
    CASE('force')
       CALL ocean_forced_noice( &
            itime, dtime, jour, knon, knindex, &
            p1lay, cdragh, cdragq, cdragm, precip_rain, precip_snow, &
            temp_air, spechum, &
            AcoefH, AcoefQ, BcoefH, BcoefQ, &
            AcoefU, AcoefV, BcoefU, BcoefV, &
            ps, u1, v1, gustiness, &
            radsol, snow, agesno, &
            qsurf, evap, fluxsens, fluxlat, flux_u1, flux_v1, &
            tsurf_new, dflux_s, dflux_l)
    END SELECT

!******************************************************************************
! fcodron: compute lmt_bils  forced case (same as wfbils_oce / 1.-contfracatm)
!******************************************************************************
    IF (type_ocean.NE.'slab') THEN
        lmt_bils(1:klon)=0.
        DO i=1,knon
           lmt_bils(knindex(i))=(swnet(i)+lwnet(i)+fluxsens(i)+fluxlat(i)) &
           *pctsrf(knindex(i),is_oce)/(1.-zmasq(knindex(i))) 
        END DO
    END IF

!******************************************************************************
! Calculate ocean surface albedo
!******************************************************************************
!albedo SB >>>
IF (iflag_albedo==0) THEN
!--old parametrizations of ocean surface albedo
!
    IF (cycle_diurne) THEN
!
       CALL alboc_cd(rmu0,alb_eau)
!
!--ad-hoc correction for model radiative balance tuning
!--now outside alboc_cd routine
       alb_eau(1:klon) = fmagic*alb_eau(1:klon) + pmagic
       alb_eau(1:klon)=MIN(MAX(alb_eau(1:klon),0.0),1.0)
!
    ELSE
!
       CALL alboc(REAL(jour),rlat,alb_eau)
!--ad-hoc correction for model radiative balance tuning
!--now outside alboc routine
       alb_eau(1:klon) = fmagic*alb_eau(1:klon) + pmagic
       alb_eau(1:klon)=MIN(MAX(alb_eau(1:klon),0.04),0.60)
!
    ENDIF
!
    DO i =1, knon
      DO  k=1,nsw
       alb_dir_new(i,k) = alb_eau(knindex(i))
      ENDDO
    ENDDO
!IM 09122015 next line corresponds to the old way of doing in LMDZ5A/IPSLCM5A versions 
!albedo for diffuse radiation is taken the same as for direct radiation
     alb_dif_new(1:knon,:)=alb_dir_new(1:knon,:)
!IM 09122015 end
!
ELSE IF (iflag_albedo==1) THEN
!--new parametrization of ocean surface albedo by Sunghye Baek
!--albedo for direct and diffuse radiation are different
!
    CALL ocean_albedo(knon,rmu0,knindex,windsp,SFRWL,alb_dir_new,alb_dif_new)
!
!--ad-hoc correction for model radiative balance tuning
    alb_dir_new(1:knon,:) = fmagic*alb_dir_new(1:knon,:) + pmagic
    alb_dif_new(1:knon,:) = fmagic*alb_dif_new(1:knon,:) + pmagic
    alb_dir_new(1:knon,:)=MIN(MAX(alb_dir_new(1:knon,:),0.0),1.0)
    alb_dif_new(1:knon,:)=MIN(MAX(alb_dif_new(1:knon,:),0.0),1.0)
!
ENDIF
!albedo SB <<<

!******************************************************************************
! Calculate the rugosity
!******************************************************************************
IF (iflag_z0_oce==0) THEN
    DO i = 1, knon
       tmp = MAX(cepdu2,gustiness(i)+u1(i)**2+v1(i)**2)
       z0m(i) = 0.018*cdragm(i) * (gustiness(i)+u1(i)**2+v1(i)**2)/RG  &
            +  0.11*14e-6 / SQRT(cdragm(i) * tmp)
       z0m(i) = MAX(1.5e-05,z0m(i))
    ENDDO   
    z0h(1:knon)=z0m(1:knon) ! En attendant mieux

ELSE IF (iflag_z0_oce==1) THEN
    DO i = 1, knon
       tmp = MAX(cepdu2,gustiness(i)+u1(i)**2+v1(i)**2)
       z0m(i) = 0.018*cdragm(i) * (gustiness(i)+u1(i)**2+v1(i)**2)/RG  &
            + 0.11*14e-6 / SQRT(cdragm(i) * tmp)
       z0m(i) = MAX(1.5e-05,z0m(i))
       z0h(i)=0.4*14e-6 / SQRT(cdragm(i) * tmp)
    ENDDO
ELSE IF (iflag_z0_oce==-1) THEN
    DO i = 1, knon
       z0m(i) = z0min
       z0h(i) = z0min
    ENDDO
ELSE
       CALL abort_physic(modname,'version non prevue',1)
ENDIF
!
!******************************************************************************
  END SUBROUTINE surf_ocean
!******************************************************************************
!
END MODULE surf_ocean_mod