! $Id: calcaerosolstrato_rrtm.F90 5159 2024-08-02 19:58:25Z fairhead $

SUBROUTINE calcaerosolstrato_rrtm(pplay, t_seri, paprs, debut)

  USE phys_state_var_mod, ONLY: tau_aero_sw_rrtm, piz_aero_sw_rrtm, cg_aero_sw_rrtm, tau_aero_lw_rrtm
  USE phys_local_var_mod, ONLY: mdw, tausum_aero, tausum_strat, tau_strat_550, tau_strat_1020, stratomask
  USE aero_mod
  USE dimphy
  USE temps_mod
  USE lmdz_yomcst
  USE lmdz_iniprint, ONLY: lunout, prt_level
  USE lmdz_clesphys

USE lmdz_dimensions, ONLY: iim, jjm, llm, ndm
  USE lmdz_paramet
  IMPLICIT NONE




  ! Variable input
  REAL, DIMENSION(klon, klev), INTENT(IN) :: t_seri  ! Temperature
  REAL, DIMENSION(klon, klev), INTENT(IN) :: pplay   ! pression pour le mileu de chaque couche (en Pa)
  LOGICAL, INTENT(IN) :: debut   ! le flag de l'initialisation de la physique
  REAL, DIMENSION(klon, klev + 1), INTENT(IN) :: paprs   ! pression pour chaque inter-couche (en Pa)

  ! Stratospheric aerosols optical properties
  REAL, DIMENSION(klon, klev, nbands_sw_rrtm) :: tau_strat, piz_strat, cg_strat
  REAL, DIMENSION(klon, klev, nwave_sw + nwave_lw) :: tau_strat_wave
  REAL, DIMENSION(klon, klev, nbands_lw_rrtm) :: tau_lw_abs_rrtm

  INTEGER k, band, wave, i
  REAL zrho, zdz

  !--calculate optical properties of the aerosol size distribution from tr_seri
  tau_strat = 0.0
  piz_strat = 0.0
  cg_strat = 0.0
  tau_strat_wave = 0.0
  tau_lw_abs_rrtm = 0.0

  CALL miecalc_aer(tau_strat, piz_strat, cg_strat, tau_strat_wave, tau_lw_abs_rrtm, paprs, debut)

  !!--test CK: deactivate radiative effect of aerosol
  !  tau_strat=0.0
  !  piz_strat=0.0
  !  cg_strat=0.0
  !  tau_strat_wave=0.0
  !  tau_lw_abs_rrtm=0.0

  !--test CK: deactivate SW radiative effect of aerosol (but leave LW)
  !  tau_strat=0.0
  !  piz_strat=0.0
  !  cg_strat=0.0

  !  DO wave=1, nwave_sw
  !  tau_strat_wave(:,:,wave)=0.0
  !  ENDDO

  !--test CK: deactivate LW radiative effect of aerosol (but leave SW)
  !  tau_lw_abs_rrtm=0.0

  !  DO wave=nwave_sw+1, nwave_sw+nwave_lw
  !  tau_strat_wave(:,:,wave)=0.0
  !  ENDDO

  !--total vertical aod at the 5 SW + 1 LW wavelengths
  DO wave = 1, nwave_sw + nwave_lw
    DO k = 1, klev
      tausum_aero(:, wave, id_STRAT_phy) = tausum_aero(:, wave, id_STRAT_phy) + tau_strat_wave(:, k, wave)
    ENDDO
  ENDDO

  !--weighted average for cg, piz and tau, adding strat aerosols on top of tropospheric ones
  DO band = 1, nbands_sw_rrtm
    !--no stratospheric aerosol in index 1
    cg_aero_sw_rrtm(:, :, 1, band) = cg_aero_sw_rrtm(:, :, 2, band)
    piz_aero_sw_rrtm(:, :, 1, band) = piz_aero_sw_rrtm(:, :, 2, band)
    tau_aero_sw_rrtm(:, :, 1, band) = tau_aero_sw_rrtm(:, :, 2, band)

    !--tropospheric and stratospheric aerosol in index 2
    cg_aero_sw_rrtm(:, :, 2, band) = (cg_aero_sw_rrtm(:, :, 2, band) * piz_aero_sw_rrtm(:, :, 2, band) * tau_aero_sw_rrtm(:, :, 2, band) + &
            cg_strat(:, :, band) * piz_strat(:, :, band) * tau_strat(:, :, band)) / &
            MAX(piz_aero_sw_rrtm(:, :, 2, band) * tau_aero_sw_rrtm(:, :, 2, band) + &
                    piz_strat(:, :, band) * tau_strat(:, :, band), 1.e-15)
    piz_aero_sw_rrtm(:, :, 2, band) = (piz_aero_sw_rrtm(:, :, 2, band) * tau_aero_sw_rrtm(:, :, 2, band) + &
            piz_strat(:, :, band) * tau_strat(:, :, band)) / &
            MAX(tau_aero_sw_rrtm(:, :, 2, band) + tau_strat(:, :, band), 1.e-15)
    tau_aero_sw_rrtm(:, :, 2, band) = tau_aero_sw_rrtm(:, :, 2, band) + tau_strat(:, :, band)
  ENDDO

  DO band = 1, nbands_lw_rrtm
    !--no stratospheric aerosols in index 1
    tau_aero_lw_rrtm(:, :, 1, band) = tau_aero_lw_rrtm(:, :, 2, band)
    !--tropospheric and stratospheric aerosol in index 2
    tau_aero_lw_rrtm(:, :, 2, band) = tau_aero_lw_rrtm(:, :, 2, band) + tau_lw_abs_rrtm(:, :, band)
  ENDDO

  WHERE (tau_aero_sw_rrtm < 1.e-14) piz_aero_sw_rrtm = 1.0
  WHERE (tau_aero_sw_rrtm < 1.e-14) tau_aero_sw_rrtm = 1.e-15
  WHERE (tau_aero_lw_rrtm < 1.e-14) tau_aero_lw_rrtm = 1.e-15

  tausum_strat(:, :) = 0.0
  DO i = 1, klon
    DO k = 1, klev
      IF (stratomask(i, k)>0.5) THEN
        tausum_strat(i, 1) = tausum_strat(i, 1) + tau_strat_wave(i, k, 2)  !--550 nm
        tausum_strat(i, 2) = tausum_strat(i, 2) + tau_strat_wave(i, k, 5)  !--1020 nm
        tausum_strat(i, 3) = tausum_strat(i, 3) + tau_strat_wave(i, k, 6)  !--10 um
      ENDIF
    ENDDO
  ENDDO

  DO i = 1, klon
    DO k = 1, klev
      zrho = pplay(i, k) / t_seri(i, k) / RD            !air density in kg/m3
      zdz = (paprs(i, k) - paprs(i, k + 1)) / zrho / RG     !thickness of layer in m
      tau_strat_550(i, k) = tau_strat_wave(i, k, 2) / zdz
      tau_strat_1020(i, k) = tau_strat_wave(i, k, 5) / zdz
    ENDDO
  ENDDO

END SUBROUTINE calcaerosolstrato_rrtm