| 1 | ! |
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| 2 | MODULE surf_landice_mod |
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| 3 | |
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| 4 | IMPLICIT NONE |
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| 5 | |
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| 6 | CONTAINS |
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| 7 | ! |
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| 8 | !**************************************************************************************** |
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| 9 | ! |
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| 10 | SUBROUTINE surf_landice(itime, dtime, knon, knindex, & |
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| 11 | rlon, rlat, debut, lafin, & |
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| 12 | rmu0, lwdownm, albedo, pphi1, & |
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| 13 | swnet, lwnet, tsurf, p1lay, & |
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| 14 | cdragh, cdragm, precip_rain, precip_snow, precip_bs, temp_air, spechum, & |
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| 15 | AcoefH, AcoefQ, BcoefH, BcoefQ, & |
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| 16 | AcoefU, AcoefV, BcoefU, BcoefV, & |
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| 17 | AcoefQBS, BcoefQBS, & |
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| 18 | ps, u1, v1, gustiness, rugoro, pctsrf, & |
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| 19 | snow, qsurf, qsol, qbs1, agesno, & |
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| 20 | tsoil, z0m, z0h, SFRWL, alb_dir, alb_dif, evap, fluxsens, fluxlat, fluxbs, & |
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| 21 | tsurf_new, dflux_s, dflux_l, & |
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| 22 | alt, slope, cloudf, & |
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| 23 | snowhgt, qsnow, to_ice, sissnow, & |
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| 24 | alb3, runoff, & |
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| 25 | flux_u1, flux_v1 & |
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| 26 | #ifdef ISO |
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| 27 | & ,xtprecip_rain, xtprecip_snow,xtspechum,Rland_ice & |
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| 28 | & ,xtsnow,xtsol,xtevap & |
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| 29 | #endif |
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| 30 | & ) |
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| 31 | |
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| 32 | USE dimphy |
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| 33 | USE surface_data, ONLY : type_ocean, calice, calsno, landice_opt, iflag_albcalc |
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| 34 | USE fonte_neige_mod, ONLY : fonte_neige,run_off_lic,fqcalving_global,ffonte_global,fqfonte_global,runofflic_global |
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| 35 | USE cpl_mod, ONLY : cpl_send_landice_fields |
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| 36 | USE calcul_fluxs_mod |
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| 37 | USE phys_local_var_mod, ONLY : zxrhoslic, zxustartlic |
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| 38 | USE phys_output_var_mod, ONLY : snow_o,zfra_o |
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| 39 | #ifdef ISO |
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| 40 | USE fonte_neige_mod, ONLY : xtrun_off_lic |
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| 41 | USE infotrac_phy, ONLY : ntiso,niso |
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| 42 | USE isotopes_routines_mod, ONLY: calcul_iso_surf_lic_vectall |
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| 43 | #ifdef ISOVERIF |
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| 44 | use isotopes_mod, ONLY: iso_eau,ridicule |
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| 45 | use isotopes_verif_mod |
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| 46 | #endif |
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| 47 | #endif |
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| 48 | USE geometry_mod, ONLY : longitude,latitude |
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| 49 | |
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| 50 | !FC |
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| 51 | USE ioipsl_getin_p_mod, ONLY : getin_p |
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| 52 | USE lmdz_blowing_snow_ini, ONLY : zeta_bs, pbst_bs, prt_bs, iflag_saltation_bs |
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| 53 | |
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| 54 | #ifdef CPP_INLANDSIS |
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| 55 | USE surf_inlandsis_mod, ONLY : surf_inlandsis |
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| 56 | #endif |
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| 57 | |
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| 58 | USE indice_sol_mod |
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| 59 | |
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| 60 | |
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| 61 | ! INCLUDE "indicesol.h" |
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| 62 | INCLUDE "dimsoil.h" |
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| 63 | INCLUDE "YOMCST.h" |
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| 64 | INCLUDE "clesphys.h" |
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| 65 | |
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| 66 | ! Input variables |
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| 67 | !**************************************************************************************** |
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| 68 | INTEGER, INTENT(IN) :: itime, knon |
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| 69 | INTEGER, DIMENSION(klon), INTENT(in) :: knindex |
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| 70 | REAL, INTENT(in) :: dtime |
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| 71 | REAL, DIMENSION(klon), INTENT(IN) :: swnet ! net shortwave radiance |
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| 72 | REAL, DIMENSION(klon), INTENT(IN) :: lwnet ! net longwave radiance |
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| 73 | REAL, DIMENSION(klon), INTENT(IN) :: tsurf |
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| 74 | REAL, DIMENSION(klon), INTENT(IN) :: p1lay |
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| 75 | REAL, DIMENSION(klon), INTENT(IN) :: cdragh, cdragm |
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| 76 | REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow, precip_bs |
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| 77 | REAL, DIMENSION(klon), INTENT(IN) :: temp_air, spechum |
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| 78 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefH, AcoefQ |
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| 79 | REAL, DIMENSION(klon), INTENT(IN) :: BcoefH, BcoefQ |
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| 80 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefU, AcoefV, BcoefU, BcoefV |
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| 81 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefQBS, BcoefQBS |
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| 82 | REAL, DIMENSION(klon), INTENT(IN) :: ps |
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| 83 | REAL, DIMENSION(klon), INTENT(IN) :: u1, v1, gustiness, qbs1 |
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| 84 | REAL, DIMENSION(klon), INTENT(IN) :: rugoro |
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| 85 | REAL, DIMENSION(klon,nbsrf), INTENT(IN) :: pctsrf |
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| 86 | #ifdef ISO |
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| 87 | REAL, DIMENSION(ntiso,klon), INTENT(IN) :: xtprecip_rain, xtprecip_snow |
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| 88 | REAL, DIMENSION(ntiso,klon), INTENT(IN) :: xtspechum |
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| 89 | #endif |
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| 90 | |
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| 91 | LOGICAL, INTENT(IN) :: debut !true if first step |
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| 92 | LOGICAL, INTENT(IN) :: lafin !true if last step |
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| 93 | REAL, DIMENSION(klon), INTENT(IN) :: rlon, rlat |
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| 94 | REAL, DIMENSION(klon), INTENT(IN) :: rmu0 |
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| 95 | REAL, DIMENSION(klon), INTENT(IN) :: lwdownm !ylwdown |
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| 96 | REAL, DIMENSION(klon), INTENT(IN) :: albedo !mean albedo |
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| 97 | REAL, DIMENSION(klon), INTENT(IN) :: pphi1 |
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| 98 | REAL, DIMENSION(klon), INTENT(IN) :: alt !mean altitude of the grid box |
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| 99 | REAL, DIMENSION(klon), INTENT(IN) :: slope !mean slope in grid box |
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| 100 | REAL, DIMENSION(klon), INTENT(IN) :: cloudf !total cloud fraction |
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| 101 | |
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| 102 | ! In/Output variables |
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| 103 | !**************************************************************************************** |
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| 104 | REAL, DIMENSION(klon), INTENT(INOUT) :: snow, qsol |
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| 105 | REAL, DIMENSION(klon), INTENT(INOUT) :: agesno |
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| 106 | REAL, DIMENSION(klon, nsoilmx), INTENT(INOUT) :: tsoil |
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| 107 | #ifdef ISO |
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| 108 | REAL, DIMENSION(niso,klon), INTENT(INOUT) :: xtsnow, xtsol |
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| 109 | REAL, DIMENSION(niso,klon), INTENT(INOUT) :: Rland_ice |
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| 110 | #endif |
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| 111 | |
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| 112 | ! Output variables |
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| 113 | !**************************************************************************************** |
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| 114 | REAL, DIMENSION(klon), INTENT(OUT) :: qsurf |
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| 115 | REAL, DIMENSION(klon), INTENT(OUT) :: z0m, z0h |
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| 116 | !albedo SB >>> |
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| 117 | ! REAL, DIMENSION(klon), INTENT(OUT) :: alb1 ! new albedo in visible SW interval |
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| 118 | ! REAL, DIMENSION(klon), INTENT(OUT) :: alb2 ! new albedo in near IR interval |
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| 119 | REAL, DIMENSION(6), INTENT(IN) :: SFRWL |
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| 120 | REAL, DIMENSION(klon,nsw), INTENT(OUT) :: alb_dir,alb_dif |
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| 121 | !albedo SB <<< |
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| 122 | REAL, DIMENSION(klon), INTENT(OUT) :: evap, fluxsens, fluxlat |
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| 123 | REAL, DIMENSION(klon), INTENT(OUT) :: fluxbs |
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| 124 | REAL, DIMENSION(klon), INTENT(OUT) :: tsurf_new |
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| 125 | REAL, DIMENSION(klon), INTENT(OUT) :: dflux_s, dflux_l |
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| 126 | REAL, DIMENSION(klon), INTENT(OUT) :: flux_u1, flux_v1 |
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| 127 | |
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| 128 | REAL, DIMENSION(klon), INTENT(OUT) :: alb3 |
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| 129 | REAL, DIMENSION(klon), INTENT(OUT) :: qsnow !column water in snow [kg/m2] |
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| 130 | REAL, DIMENSION(klon), INTENT(OUT) :: snowhgt !Snow height (m) |
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| 131 | REAL, DIMENSION(klon), INTENT(OUT) :: to_ice |
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| 132 | REAL, DIMENSION(klon), INTENT(OUT) :: sissnow |
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| 133 | REAL, DIMENSION(klon), INTENT(OUT) :: runoff !Land ice runoff |
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| 134 | #ifdef ISO |
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| 135 | REAL, DIMENSION(ntiso,klon), INTENT(OUT) :: xtevap |
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| 136 | ! real, DIMENSION(niso,klon) :: xtrun_off_lic_0_diag ! est une variable globale de |
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| 137 | ! fonte_neige |
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| 138 | #endif |
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| 139 | |
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| 140 | |
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| 141 | ! Local variables |
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| 142 | !**************************************************************************************** |
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| 143 | REAL, DIMENSION(klon) :: soilcap, soilflux |
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| 144 | REAL, DIMENSION(klon) :: cal, beta, dif_grnd |
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| 145 | REAL, DIMENSION(klon) :: zfra, alb_neig |
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| 146 | REAL, DIMENSION(klon) :: radsol |
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| 147 | REAL, DIMENSION(klon) :: u0, v0, u1_lay, v1_lay, ustar |
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| 148 | INTEGER :: i,j,nt |
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| 149 | REAL, DIMENSION(klon) :: fqfonte,ffonte |
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| 150 | REAL, DIMENSION(klon) :: run_off_lic_frac |
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| 151 | #ifdef ISO |
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| 152 | real, parameter :: t_coup = 273.15 |
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| 153 | real, dimension(klon) :: fqfonte_diag |
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| 154 | real, dimension(klon) :: fq_fonte_diag |
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| 155 | real, dimension(klon) :: snow_evap_diag |
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| 156 | real, dimension(klon) :: fqcalving_diag |
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| 157 | real max_eau_sol_diag |
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| 158 | real, dimension(klon) :: runoff_diag |
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| 159 | real, dimension(klon) :: run_off_lic_diag |
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| 160 | real :: coeff_rel_diag |
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| 161 | integer ixt |
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| 162 | REAL, DIMENSION(niso,klon) :: xtsnow_prec,xtsol_prec |
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| 163 | REAL, DIMENSION(klon) :: snow_prec,qsol_prec |
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| 164 | ! real, DIMENSION(klon) :: run_off_lic_0_diag |
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| 165 | #endif |
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| 166 | |
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| 167 | REAL, DIMENSION(klon) :: emis_new !Emissivity |
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| 168 | REAL, DIMENSION(klon) :: swdown,lwdown |
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| 169 | REAL, DIMENSION(klon) :: precip_snow_adv, snow_adv !Snow Drift precip./advection (not used in inlandsis) |
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| 170 | REAL, DIMENSION(klon) :: erod !erosion of surface snow (flux, kg/m2/s like evap) |
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| 171 | REAL, DIMENSION(klon) :: zsl_height, wind_velo !surface layer height, wind spd |
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| 172 | REAL, DIMENSION(klon) :: dens_air, snow_cont_air !air density; snow content air |
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| 173 | REAL, DIMENSION(klon) :: alb_soil !albedo of underlying ice |
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| 174 | REAL, DIMENSION(klon) :: pexner !Exner potential |
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| 175 | REAL :: pref |
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| 176 | REAL, DIMENSION(klon,nsoilmx) :: tsoil0 !modif |
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| 177 | REAL :: dtis ! subtimestep |
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| 178 | LOGICAL :: debut_is, lafin_is ! debut and lafin for inlandsis |
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| 179 | |
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| 180 | CHARACTER (len = 20) :: modname = 'surf_landice' |
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| 181 | CHARACTER (len = 80) :: abort_message |
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| 182 | |
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| 183 | |
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| 184 | REAL,DIMENSION(klon) :: alb1,alb2 |
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| 185 | REAL,DIMENSION(klon) :: precip_totsnow, evap_totsnow |
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| 186 | REAL, DIMENSION (klon,6) :: alb6 |
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| 187 | REAL :: rho0, rhoice, ustart0,esalt, rhod |
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| 188 | REAL :: lambdasalt,fluxsalt, csalt, nunu, aa, bb, cc |
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| 189 | REAL :: tau_dens, tau_dens0, tau_densmin, rhomax, rhohard |
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| 190 | REAL, DIMENSION(klon) :: ws1, rhos, ustart, qsalt, hsalt, snowini |
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| 191 | REAL :: maxerosion ! in kg/s |
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| 192 | |
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| 193 | ! End definition |
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| 194 | !**************************************************************************************** |
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| 195 | !FC |
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| 196 | !FC |
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| 197 | REAL,SAVE :: alb_vis_sno_lic |
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| 198 | !$OMP THREADPRIVATE(alb_vis_sno_lic) |
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| 199 | REAL,SAVE :: alb_nir_sno_lic |
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| 200 | !$OMP THREADPRIVATE(alb_nir_sno_lic) |
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| 201 | LOGICAL, SAVE :: firstcall = .TRUE. |
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| 202 | !$OMP THREADPRIVATE(firstcall) |
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| 203 | |
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| 204 | |
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| 205 | !FC firtscall initializations |
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| 206 | !****************************************************************************************** |
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| 207 | #ifdef ISO |
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| 208 | #ifdef ISOVERIF |
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| 209 | ! write(*,*) 'surf_land_ice 1499' |
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| 210 | do i=1,knon |
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| 211 | if (iso_eau.gt.0) then |
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| 212 | call iso_verif_egalite_choix(xtsnow(iso_eau,i),snow(i), & |
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| 213 | & 'surf_land_ice 126',errmax,errmaxrel) |
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| 214 | endif !if (iso_eau.gt.0) then |
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| 215 | enddo !do i=1,knon |
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| 216 | #endif |
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| 217 | #endif |
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| 218 | |
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| 219 | IF (firstcall) THEN |
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| 220 | alb_vis_sno_lic=0.77 |
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| 221 | CALL getin_p('alb_vis_sno_lic',alb_vis_sno_lic) |
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| 222 | PRINT*, 'alb_vis_sno_lic',alb_vis_sno_lic |
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| 223 | alb_nir_sno_lic=0.77 |
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| 224 | CALL getin_p('alb_nir_sno_lic',alb_nir_sno_lic) |
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| 225 | PRINT*, 'alb_nir_sno_lic',alb_nir_sno_lic |
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| 226 | |
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| 227 | firstcall=.false. |
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| 228 | ENDIF |
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| 229 | !****************************************************************************************** |
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| 230 | |
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| 231 | ! Initialize output variables |
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| 232 | alb3(:) = 999999. |
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| 233 | alb2(:) = 999999. |
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| 234 | alb1(:) = 999999. |
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| 235 | fluxbs(:)=0. |
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| 236 | runoff(:) = 0. |
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| 237 | !**************************************************************************************** |
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| 238 | ! Calculate total absorbed radiance at surface |
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| 239 | ! |
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| 240 | !**************************************************************************************** |
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| 241 | radsol(:) = 0.0 |
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| 242 | radsol(1:knon) = swnet(1:knon) + lwnet(1:knon) |
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| 243 | |
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| 244 | !**************************************************************************************** |
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| 245 | |
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| 246 | !**************************************************************************************** |
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| 247 | ! landice_opt = 0 : soil_model, calcul_flux, fonte_neige, ... |
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| 248 | ! landice_opt = 1 : prepare and call INterace Lmdz SISvat (INLANDSIS) |
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| 249 | !**************************************************************************************** |
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| 250 | |
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| 251 | |
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| 252 | IF (landice_opt .EQ. 1) THEN |
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| 253 | |
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| 254 | !**************************************************************************************** |
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| 255 | ! CALL to INLANDSIS interface |
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| 256 | !**************************************************************************************** |
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| 257 | #ifdef CPP_INLANDSIS |
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| 258 | |
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| 259 | #ifdef ISO |
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| 260 | CALL abort_gcm('surf_landice 235','isotopes pas dans INLANDSIS',1) |
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| 261 | #endif |
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| 262 | |
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| 263 | debut_is=debut |
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| 264 | lafin_is=.false. |
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| 265 | ! Suppose zero surface speed |
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| 266 | u0(:) = 0.0 |
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| 267 | v0(:) = 0.0 |
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| 268 | |
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| 269 | |
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| 270 | CALL calcul_flux_wind(knon, dtime, & |
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| 271 | u0, v0, u1, v1, gustiness, cdragm, & |
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| 272 | AcoefU, AcoefV, BcoefU, BcoefV, & |
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| 273 | p1lay, temp_air, & |
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| 274 | flux_u1, flux_v1) |
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| 275 | |
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| 276 | |
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| 277 | ! Set constants and compute some input for SISVAT |
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| 278 | ! = 1000 hPa |
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| 279 | ! and calculate incoming flux for SW and LW interval: swdown, lwdown |
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| 280 | swdown(:) = 0.0 |
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| 281 | lwdown(:) = 0.0 |
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| 282 | snow_cont_air(:) = 0. ! the snow content in air is not a prognostic variable of the model |
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| 283 | alb_soil(:) = 0.4 ! before albedo(:) but here it is the ice albedo that we have to set |
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| 284 | ustar(:) = 0. |
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| 285 | pref = 100000. |
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| 286 | DO i = 1, knon |
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| 287 | swdown(i) = swnet(i)/(1-albedo(i)) |
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| 288 | lwdown(i) = lwdownm(i) |
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| 289 | wind_velo(i) = u1(i)**2 + v1(i)**2 |
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| 290 | wind_velo(i) = wind_velo(i)**0.5 |
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| 291 | pexner(i) = (p1lay(i)/pref)**(RD/RCPD) |
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| 292 | dens_air(i) = p1lay(i)/RD/temp_air(i) ! dry air density |
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| 293 | zsl_height(i) = pphi1(i)/RG |
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| 294 | tsoil0(i,:) = tsoil(i,:) |
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| 295 | ustar(i)= (cdragm(i)*(wind_velo(i)**2))**0.5 |
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| 296 | END DO |
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| 297 | |
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| 298 | |
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| 299 | |
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| 300 | dtis=dtime |
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| 301 | |
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| 302 | IF (lafin) THEN |
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| 303 | lafin_is=.true. |
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| 304 | END IF |
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| 305 | |
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| 306 | CALL surf_inlandsis(knon, rlon, rlat, knindex, itime, dtis, debut_is, lafin_is,& |
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| 307 | rmu0, swdown, lwdown, albedo, pexner, ps, p1lay, precip_rain, precip_snow, & |
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| 308 | zsl_height, wind_velo, ustar, temp_air, dens_air, spechum, tsurf,& |
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| 309 | rugoro, snow_cont_air, alb_soil, alt, slope, cloudf, & |
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| 310 | radsol, qsol, tsoil0, snow, zfra, snowhgt, qsnow, to_ice, sissnow,agesno, & |
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| 311 | AcoefH, AcoefQ, BcoefH, BcoefQ, cdragm, cdragh, & |
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| 312 | run_off_lic, fqfonte, ffonte, evap, erod, fluxsens, fluxlat,dflux_s, dflux_l, & |
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| 313 | tsurf_new, alb1, alb2, alb3, alb6, & |
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| 314 | emis_new, z0m, z0h, qsurf) |
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| 315 | |
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| 316 | debut_is=.false. |
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| 317 | |
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| 318 | |
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| 319 | ! Treatment of snow melting and calving |
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| 320 | |
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| 321 | ! for consistency with standard LMDZ, add calving to run_off_lic |
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| 322 | run_off_lic(:)=run_off_lic(:) + to_ice(:) |
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| 323 | |
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| 324 | DO i = 1, knon |
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| 325 | ffonte_global(knindex(i),is_lic) = ffonte(i) |
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| 326 | fqfonte_global(knindex(i),is_lic) = fqfonte(i)! net melting= melting - refreezing |
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| 327 | fqcalving_global(knindex(i),is_lic) = to_ice(i) ! flux |
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| 328 | runofflic_global(knindex(i)) = run_off_lic(i) |
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| 329 | ENDDO |
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| 330 | ! Here, we assume that the calving term is equal to the to_ice term |
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| 331 | ! (no ice accumulation) |
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| 332 | |
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| 333 | |
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| 334 | #else |
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| 335 | abort_message='Pb de coherence: landice_opt = 1 mais CPP_INLANDSIS = .false.' |
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| 336 | CALL abort_physic(modname,abort_message,1) |
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| 337 | #endif |
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| 338 | |
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| 339 | |
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| 340 | ELSE |
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| 341 | |
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| 342 | !**************************************************************************************** |
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| 343 | ! Soil calculations |
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| 344 | ! |
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| 345 | !**************************************************************************************** |
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| 346 | |
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| 347 | ! EV: use calbeta |
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| 348 | CALL calbeta(dtime, is_lic, knon, snow, qsol, beta, cal, dif_grnd) |
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| 349 | |
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| 350 | |
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| 351 | ! use soil model and recalculate properly cal |
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| 352 | IF (soil_model) THEN |
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| 353 | CALL soil(dtime, is_lic, knon, snow, tsurf, qsol, & |
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| 354 | & longitude(knindex(1:knon)), latitude(knindex(1:knon)), tsoil, soilcap, soilflux) |
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| 355 | cal(1:knon) = RCPD / soilcap(1:knon) |
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| 356 | radsol(1:knon) = radsol(1:knon) + soilflux(1:knon) |
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| 357 | ELSE |
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| 358 | cal = RCPD * calice |
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| 359 | WHERE (snow > 0.0) cal = RCPD * calsno |
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| 360 | ENDIF |
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| 361 | |
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| 362 | |
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| 363 | !**************************************************************************************** |
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| 364 | ! Calulate fluxes |
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| 365 | ! |
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| 366 | !**************************************************************************************** |
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| 367 | ! beta(:) = 1.0 |
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| 368 | ! dif_grnd(:) = 0.0 |
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| 369 | |
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| 370 | ! Suppose zero surface speed |
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| 371 | u0(:)=0.0 |
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| 372 | v0(:)=0.0 |
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| 373 | u1_lay(:) = u1(:) - u0(:) |
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| 374 | v1_lay(:) = v1(:) - v0(:) |
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| 375 | |
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| 376 | CALL calcul_fluxs(knon, is_lic, dtime, & |
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| 377 | tsurf, p1lay, cal, beta, cdragh, cdragh, ps, & |
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| 378 | precip_rain, precip_snow, snow, qsurf, & |
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| 379 | radsol, dif_grnd, temp_air, spechum, u1_lay, v1_lay, gustiness, & |
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| 380 | 1.,AcoefH, AcoefQ, BcoefH, BcoefQ, & |
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| 381 | tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l) |
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| 382 | |
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| 383 | |
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| 384 | #ifdef ISO |
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| 385 | ! verif |
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| 386 | #ifdef ISOVERIF |
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| 387 | !write(*,*) 'surf_land_ice 1499' |
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| 388 | do i=1,knon |
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| 389 | if (iso_eau.gt.0) then |
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| 390 | if (snow(i).gt.ridicule) then |
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| 391 | call iso_verif_egalite_choix(xtsnow(iso_eau,i),snow(i), & |
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| 392 | & 'surf_land_ice 1151',errmax,errmaxrel) |
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| 393 | endif !if ((snow(i).gt.ridicule)) then |
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| 394 | endif !if (iso_eau.gt.0) then |
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| 395 | enddo !do i=1,knon |
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| 396 | #endif |
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| 397 | !#ifdef ISOVERIF |
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| 398 | |
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| 399 | do i=1,knon |
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| 400 | snow_prec(i)=snow(i) |
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| 401 | do ixt=1,niso |
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| 402 | xtsnow_prec(ixt,i)=xtsnow(ixt,i) |
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| 403 | enddo !do ixt=1,niso |
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| 404 | ! initialisation: |
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| 405 | fq_fonte_diag(i)=0.0 |
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| 406 | fqfonte_diag(i)=0.0 |
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| 407 | snow_evap_diag(i)=0.0 |
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| 408 | enddo !do i=1,knon |
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| 409 | #endif |
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| 410 | !#ifdef ISO |
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| 411 | CALL calcul_flux_wind(knon, dtime, & |
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| 412 | u0, v0, u1, v1, gustiness, cdragm, & |
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| 413 | AcoefU, AcoefV, BcoefU, BcoefV, & |
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| 414 | p1lay, temp_air, & |
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| 415 | flux_u1, flux_v1) |
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| 416 | |
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| 417 | |
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| 418 | !**************************************************************************************** |
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| 419 | ! Calculate albedo |
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| 420 | ! |
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| 421 | !**************************************************************************************** |
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| 422 | |
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| 423 | CALL albsno(klon,knon,dtime,agesno(:),alb_neig(:), precip_snow(:)) |
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| 424 | |
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| 425 | |
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| 426 | ! EV: following lines are obsolete since we set alb1 and alb2 to constant values |
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| 427 | ! I therefore comment them |
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| 428 | ! alb1(1:knon) = alb_neig(1:knon)*zfra(1:knon) + & |
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| 429 | ! 0.6 * (1.0-zfra(1:knon)) |
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| 430 | ! |
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| 431 | !IM: plusieurs choix/tests sur l'albedo des "glaciers continentaux" |
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| 432 | ! alb1(1 : knon) = 0.6 !IM cf FH/GK |
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| 433 | ! alb1(1 : knon) = 0.82 |
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| 434 | ! alb1(1 : knon) = 0.77 !211003 Ksta0.77 |
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| 435 | ! alb1(1 : knon) = 0.8 !KstaTER0.8 & LMD_ARMIP5 |
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| 436 | !IM: KstaTER0.77 & LMD_ARMIP6 |
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| 437 | |
|---|
| 438 | ! Attantion: alb1 and alb2 are not the same! |
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| 439 | alb1(1:knon) = alb_vis_sno_lic |
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| 440 | alb2(1:knon) = alb_nir_sno_lic |
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| 441 | |
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| 442 | |
|---|
| 443 | !**************************************************************************************** |
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| 444 | ! Rugosity |
|---|
| 445 | ! |
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| 446 | !**************************************************************************************** |
|---|
| 447 | z0m = z0m_landice |
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| 448 | z0h = z0h_landice |
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| 449 | !z0m = SQRT(z0m**2+rugoro**2) |
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| 450 | |
|---|
| 451 | |
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| 452 | |
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| 453 | ! Simple blowing snow param |
|---|
| 454 | if (ok_bs) then |
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| 455 | ustart0 = 0.211 |
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| 456 | rhoice = 920.0 |
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| 457 | rho0 = 300.0 |
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| 458 | rhomax=450.0 |
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| 459 | rhohard=450.0 |
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| 460 | tau_dens0=86400.0*10. ! 10 days by default, in s |
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| 461 | tau_densmin=21600.0 ! 1/4 days according to in situ obs by C. Amory during blowing snow + |
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| 462 | ! Marshall et al. 1999 (snow densification during rain) |
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| 463 | |
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| 464 | ! computation of threshold friction velocity |
|---|
| 465 | ! which depends on surface snow density |
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| 466 | do j = 1, knon |
|---|
| 467 | ! estimation of snow density |
|---|
| 468 | ! snow density increases with snow age and |
|---|
| 469 | ! increases even faster in case of sedimentation of blowing snow or rain |
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| 470 | tau_dens=max(tau_densmin, tau_dens0*exp(-abs(precip_bs(j))/pbst_bs & |
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| 471 | -abs(precip_rain(j))/prt_bs) *exp(-max(tsurf(j)-272.0,0.))) |
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| 472 | rhos(j)=rho0+(rhohard-rho0)*(1.-exp(-agesno(j)*86400.0/tau_dens)) |
|---|
| 473 | ! blowing snow flux formula used in MAR |
|---|
| 474 | ws1(j)=(u1(j)**2+v1(j)**2)**0.5 |
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| 475 | ustar(j)=(cdragm(j)*(u1(j)**2+v1(j)**2))**0.5 |
|---|
| 476 | ustart(j)=ustart0*exp(max(rhoice/rho0-rhoice/rhos(j),0.))*exp(max(0.,rhos(j)-rhomax)) |
|---|
| 477 | ! we have multiplied by exp to prevent erosion when rhos>rhomax (usefull till |
|---|
| 478 | ! rhohard<450) |
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| 479 | enddo |
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| 480 | |
|---|
| 481 | ! computation of qbs at the top of the saltation layer |
|---|
| 482 | ! two formulations possible |
|---|
| 483 | ! pay attention that qbs is a mixing ratio and has to be converted |
|---|
| 484 | ! to specific content |
|---|
| 485 | |
|---|
| 486 | if (iflag_saltation_bs .eq. 1) then |
|---|
| 487 | ! expression from CRYOWRF (Sharma et al. 2022) |
|---|
| 488 | aa=2.6 |
|---|
| 489 | bb=2.5 |
|---|
| 490 | cc=2.0 |
|---|
| 491 | lambdasalt=0.45 |
|---|
| 492 | do j =1, knon |
|---|
| 493 | rhod=p1lay(j)/RD/temp_air(j) |
|---|
| 494 | nunu=max(ustar(j)/ustart(j),1.e-3) |
|---|
| 495 | fluxsalt=rhod/RG*(ustar(j)**3)*(1.-nunu**(-2)) * & |
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| 496 | (aa+bb*nunu**(-2)+cc*nunu**(-1)) |
|---|
| 497 | csalt=fluxsalt/(2.8*ustart(j)) |
|---|
| 498 | hsalt(j)=0.08436*ustar(j)**1.27 |
|---|
| 499 | qsalt(j)=1./rhod*csalt*lambdasalt*RG/(max(ustar(j)**2,1E-6)) & |
|---|
| 500 | * exp(-lambdasalt*RG*hsalt(j)/max(ustar(j)**2,1E-6)) |
|---|
| 501 | qsalt(j)=max(qsalt(j),0.) |
|---|
| 502 | enddo |
|---|
| 503 | |
|---|
| 504 | |
|---|
| 505 | else |
|---|
| 506 | ! default formulation from MAR model (Amory et al. 2021, Gallee et al. 2001) |
|---|
| 507 | do j=1, knon |
|---|
| 508 | esalt=1./(3.25*max(ustar(j),0.001)) |
|---|
| 509 | hsalt(j)=0.08436*ustar(j)**1.27 |
|---|
| 510 | qsalt(j)=(max(ustar(j)**2-ustart(j)**2,0.))/(RG*hsalt(j))*esalt |
|---|
| 511 | !ep=qsalt*cdragm(j)*sqrt(u1(j)**2+v1(j)**2) |
|---|
| 512 | enddo |
|---|
| 513 | endif |
|---|
| 514 | |
|---|
| 515 | ! calculation of erosion (flux positive towards the surface here) |
|---|
| 516 | ! consistent with implicit resolution of turbulent mixing equation |
|---|
| 517 | do j=1, knon |
|---|
| 518 | i = knindex(j) |
|---|
| 519 | rhod=p1lay(j)/RD/temp_air(j) |
|---|
| 520 | ! Nemoto and Nishimura 2004 show that steady-state saltation is achieved within an interval of about 10s |
|---|
| 521 | ! we thus prevent snowerosion (snow particle transfer from the saltation layer to the first model level) |
|---|
| 522 | ! to exceed (in intensity) integrated over 10s to exceed the total mass of snow particle in the saltation layer |
|---|
| 523 | ! (rho*qsalt*hsalt) |
|---|
| 524 | maxerosion=hsalt(j)*qsalt(j)*rhod/10. |
|---|
| 525 | fluxbs(j)=rhod*ws1(j)*cdragm(j)*(AcoefQBS(j)-qsalt(j)) & |
|---|
| 526 | / (1.-rhod*ws1(j)*cdragm(j)*BcoefQBS(j)*dtime) |
|---|
| 527 | !fluxbs(j)= rhod*ws1(j)*cdragm(j)*(qbs1(j)-qsalt(j)) |
|---|
| 528 | fluxbs(j)=max(-maxerosion,fluxbs(j)) |
|---|
| 529 | |
|---|
| 530 | ! for outputs |
|---|
| 531 | |
|---|
| 532 | zxustartlic(i) = ustart(j) |
|---|
| 533 | zxrhoslic(i) = rhos(j) |
|---|
| 534 | enddo |
|---|
| 535 | |
|---|
| 536 | endif |
|---|
| 537 | |
|---|
| 538 | |
|---|
| 539 | |
|---|
| 540 | !**************************************************************************************** |
|---|
| 541 | ! Calculate surface snow amount |
|---|
| 542 | ! |
|---|
| 543 | !**************************************************************************************** |
|---|
| 544 | IF (ok_bs) THEN |
|---|
| 545 | precip_totsnow(:)=precip_snow(:)+precip_bs(:) |
|---|
| 546 | evap_totsnow(:)=evap(:)-fluxbs(:) ! flux bs is positive towards the surface (snow erosion) |
|---|
| 547 | ELSE |
|---|
| 548 | precip_totsnow(:)=precip_snow(:) |
|---|
| 549 | evap_totsnow(:)=evap(:) |
|---|
| 550 | ENDIF |
|---|
| 551 | |
|---|
| 552 | CALL fonte_neige(knon, is_lic, knindex, dtime, & |
|---|
| 553 | tsurf, precip_rain, precip_totsnow, & |
|---|
| 554 | snow, qsol, tsurf_new, evap_totsnow & |
|---|
| 555 | #ifdef ISO |
|---|
| 556 | & ,fq_fonte_diag,fqfonte_diag,snow_evap_diag,fqcalving_diag & |
|---|
| 557 | & ,max_eau_sol_diag,runoff_diag,run_off_lic_diag,coeff_rel_diag & |
|---|
| 558 | #endif |
|---|
| 559 | & ) |
|---|
| 560 | |
|---|
| 561 | |
|---|
| 562 | #ifdef ISO |
|---|
| 563 | #ifdef ISOVERIF |
|---|
| 564 | do i=1,knon |
|---|
| 565 | if (iso_eau.gt.0) then |
|---|
| 566 | call iso_verif_egalite_choix(Rland_ice(iso_eau,i),1.0, & |
|---|
| 567 | & 'surf_landice_mod 217',errmax,errmaxrel) |
|---|
| 568 | endif !if (iso_eau.gt.0) then |
|---|
| 569 | enddo !do i=1,knon |
|---|
| 570 | #endif |
|---|
| 571 | !#ifdef ISOVERIF |
|---|
| 572 | |
|---|
| 573 | call calcul_iso_surf_lic_vectall(klon,knon, & |
|---|
| 574 | & evap,snow_evap_diag,Tsurf_new,snow, & |
|---|
| 575 | & fq_fonte_diag,fqfonte_diag,dtime,t_coup, & |
|---|
| 576 | & precip_snow,xtprecip_snow,precip_rain,xtprecip_rain, snow_prec,xtsnow_prec, & |
|---|
| 577 | & xtspechum,spechum,ps,Rland_ice, & |
|---|
| 578 | & xtevap,xtsnow,fqcalving_diag, & |
|---|
| 579 | & knindex,is_lic,run_off_lic_diag,coeff_rel_diag & |
|---|
| 580 | & ) |
|---|
| 581 | |
|---|
| 582 | ! call fonte_neige_export_xtrun_off_lic_0(knon,xtrun_off_lic_0_diag) |
|---|
| 583 | |
|---|
| 584 | #endif |
|---|
| 585 | !#ifdef ISO |
|---|
| 586 | |
|---|
| 587 | |
|---|
| 588 | WHERE (snow(1 : knon) .LT. 0.0001) agesno(1 : knon) = 0. |
|---|
| 589 | zfra(1:knon) = MAX(0.0,MIN(1.0,snow(1:knon)/(snow(1:knon)+10.0))) |
|---|
| 590 | |
|---|
| 591 | |
|---|
| 592 | END IF ! landice_opt |
|---|
| 593 | |
|---|
| 594 | |
|---|
| 595 | !**************************************************************************************** |
|---|
| 596 | ! Send run-off on land-ice to coupler if coupled ocean. |
|---|
| 597 | ! run_off_lic has been calculated in fonte_neige or surf_inlandsis |
|---|
| 598 | ! If landice_opt>=2, corresponding call is done from surf_land_orchidee |
|---|
| 599 | !**************************************************************************************** |
|---|
| 600 | IF (type_ocean=='couple' .AND. landice_opt .LT. 2) THEN |
|---|
| 601 | ! Compress fraction where run_off_lic is active (here all pctsrf(is_lic)) |
|---|
| 602 | run_off_lic_frac(:)=0.0 |
|---|
| 603 | DO j = 1, knon |
|---|
| 604 | i = knindex(j) |
|---|
| 605 | run_off_lic_frac(j) = pctsrf(i,is_lic) |
|---|
| 606 | ENDDO |
|---|
| 607 | |
|---|
| 608 | CALL cpl_send_landice_fields(itime, knon, knindex, run_off_lic, run_off_lic_frac) |
|---|
| 609 | ENDIF |
|---|
| 610 | |
|---|
| 611 | ! transfer runoff rate [kg/m2/s](!) to physiq for output |
|---|
| 612 | runoff(1:knon)=run_off_lic(1:knon)/dtime |
|---|
| 613 | |
|---|
| 614 | snow_o=0. |
|---|
| 615 | zfra_o = 0. |
|---|
| 616 | DO j = 1, knon |
|---|
| 617 | i = knindex(j) |
|---|
| 618 | snow_o(i) = snow(j) |
|---|
| 619 | zfra_o(i) = zfra(j) |
|---|
| 620 | ENDDO |
|---|
| 621 | |
|---|
| 622 | |
|---|
| 623 | !albedo SB >>> |
|---|
| 624 | select case(NSW) |
|---|
| 625 | case(2) |
|---|
| 626 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 627 | alb_dir(1:knon,2)=alb2(1:knon) |
|---|
| 628 | case(4) |
|---|
| 629 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 630 | alb_dir(1:knon,2)=alb2(1:knon) |
|---|
| 631 | alb_dir(1:knon,3)=alb2(1:knon) |
|---|
| 632 | alb_dir(1:knon,4)=alb2(1:knon) |
|---|
| 633 | case(6) |
|---|
| 634 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 635 | alb_dir(1:knon,2)=alb1(1:knon) |
|---|
| 636 | alb_dir(1:knon,3)=alb1(1:knon) |
|---|
| 637 | alb_dir(1:knon,4)=alb2(1:knon) |
|---|
| 638 | alb_dir(1:knon,5)=alb2(1:knon) |
|---|
| 639 | alb_dir(1:knon,6)=alb2(1:knon) |
|---|
| 640 | |
|---|
| 641 | IF ((landice_opt .EQ. 1) .AND. (iflag_albcalc .EQ. 2)) THEN |
|---|
| 642 | alb_dir(1:knon,1)=alb6(1:knon,1) |
|---|
| 643 | alb_dir(1:knon,2)=alb6(1:knon,2) |
|---|
| 644 | alb_dir(1:knon,3)=alb6(1:knon,3) |
|---|
| 645 | alb_dir(1:knon,4)=alb6(1:knon,4) |
|---|
| 646 | alb_dir(1:knon,5)=alb6(1:knon,5) |
|---|
| 647 | alb_dir(1:knon,6)=alb6(1:knon,6) |
|---|
| 648 | ENDIF |
|---|
| 649 | |
|---|
| 650 | end select |
|---|
| 651 | alb_dif=alb_dir |
|---|
| 652 | !albedo SB <<< |
|---|
| 653 | |
|---|
| 654 | |
|---|
| 655 | END SUBROUTINE surf_landice |
|---|
| 656 | ! |
|---|
| 657 | !**************************************************************************************** |
|---|
| 658 | ! |
|---|
| 659 | END MODULE surf_landice_mod |
|---|
| 660 | |
|---|
| 661 | |
|---|
| 662 | |
|---|
