| 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 geometry_mod, ONLY : longitude,latitude |
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| 34 | USE surface_data, ONLY : type_ocean, calice, calsno, landice_opt, iflag_albcalc |
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| 35 | USE fonte_neige_mod, ONLY : fonte_neige,run_off_lic,fqcalving_global,ffonte_global,fqfonte_global,runofflic_global |
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| 36 | USE cpl_mod, ONLY : cpl_send_landice_fields |
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| 37 | USE calcul_fluxs_mod |
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| 38 | USE phys_local_var_mod, ONLY : zxrhoslic, zxustartlic, zxqsaltlic, tempsmoothlic |
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| 39 | USE phys_output_var_mod, ONLY : snow_o,zfra_o |
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| 40 | #ifdef ISO |
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| 41 | USE fonte_neige_mod, ONLY : xtrun_off_lic |
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| 42 | USE infotrac_phy, ONLY : ntiso,niso |
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| 43 | USE isotopes_routines_mod, ONLY: calcul_iso_surf_lic_vectall |
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| 44 | #ifdef ISOVERIF |
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| 45 | USE isotopes_mod, ONLY: iso_eau,ridicule |
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| 46 | USE isotopes_verif_mod |
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| 47 | #endif |
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| 48 | #endif |
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| 49 | |
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| 50 | !FC |
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| 51 | USE clesphys_mod_h |
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| 52 | USE yomcst_mod_h |
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| 53 | USE ioipsl_getin_p_mod, ONLY : getin_p |
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| 54 | USE lmdz_blowing_snow_ini, ONLY : c_esalt_bs, zeta_bs, pbst_bs, prt_bs, rhoice_bs, rhohard_bs |
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| 55 | USE lmdz_blowing_snow_ini, ONLY : rhofresh_bs, tau_eqsalt_bs, tau_dens0_bs, tau_densmin_bs |
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| 56 | USE surf_inlandsis_mod, ONLY : surf_inlandsis |
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| 57 | |
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| 58 | USE indice_sol_mod |
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| 59 | USE lmdz_cppkeys_wrapper, ONLY: CPPKEY_INLANDSIS |
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| 60 | USE dimsoil_mod_h, ONLY: nsoilmx |
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| 61 | |
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| 62 | ! INCLUDE "indicesol.h" |
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| 63 | |
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| 64 | |
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| 65 | ! Input variables |
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| 66 | !**************************************************************************************** |
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| 67 | INTEGER, INTENT(IN) :: itime, knon |
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| 68 | INTEGER, DIMENSION(klon), INTENT(in) :: knindex |
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| 69 | REAL, INTENT(in) :: dtime |
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| 70 | REAL, DIMENSION(klon), INTENT(IN) :: swnet ! net shortwave radiance |
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| 71 | REAL, DIMENSION(klon), INTENT(IN) :: lwnet ! net longwave radiance |
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| 72 | REAL, DIMENSION(klon), INTENT(IN) :: tsurf |
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| 73 | REAL, DIMENSION(klon), INTENT(IN) :: p1lay |
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| 74 | REAL, DIMENSION(klon), INTENT(IN) :: cdragh, cdragm |
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| 75 | REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow, precip_bs |
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| 76 | REAL, DIMENSION(klon), INTENT(IN) :: temp_air, spechum |
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| 77 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefH, AcoefQ |
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| 78 | REAL, DIMENSION(klon), INTENT(IN) :: BcoefH, BcoefQ |
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| 79 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefU, AcoefV, BcoefU, BcoefV |
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| 80 | REAL, DIMENSION(klon), INTENT(IN) :: AcoefQBS, BcoefQBS |
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| 81 | REAL, DIMENSION(klon), INTENT(IN) :: ps |
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| 82 | REAL, DIMENSION(klon), INTENT(IN) :: u1, v1, gustiness, qbs1 |
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| 83 | REAL, DIMENSION(klon), INTENT(IN) :: rugoro |
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| 84 | REAL, DIMENSION(klon,nbsrf), INTENT(IN) :: pctsrf |
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| 85 | #ifdef ISO |
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| 86 | REAL, DIMENSION(ntiso,klon), INTENT(IN) :: xtprecip_rain, xtprecip_snow |
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| 87 | REAL, DIMENSION(ntiso,klon), INTENT(IN) :: xtspechum |
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| 88 | #endif |
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| 89 | |
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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 | |
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| 113 | ! Output variables |
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| 114 | !**************************************************************************************** |
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| 115 | REAL, DIMENSION(klon), INTENT(OUT) :: qsurf |
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| 116 | REAL, DIMENSION(klon), INTENT(OUT) :: z0m, z0h |
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| 117 | !albedo SB >>> |
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| 118 | ! REAL, DIMENSION(klon), INTENT(OUT) :: alb1 ! new albedo in visible SW interval |
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| 119 | ! REAL, DIMENSION(klon), INTENT(OUT) :: alb2 ! new albedo in near IR interval |
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| 120 | REAL, DIMENSION(6), INTENT(IN) :: SFRWL |
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| 121 | REAL, DIMENSION(klon,nsw), INTENT(OUT) :: alb_dir,alb_dif |
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| 122 | !albedo SB <<< |
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| 123 | REAL, DIMENSION(klon), INTENT(OUT) :: evap, fluxsens, fluxlat |
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| 124 | REAL, DIMENSION(klon), INTENT(OUT) :: fluxbs |
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| 125 | REAL, DIMENSION(klon), INTENT(OUT) :: tsurf_new |
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| 126 | REAL, DIMENSION(klon), INTENT(OUT) :: dflux_s, dflux_l |
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| 127 | REAL, DIMENSION(klon), INTENT(OUT) :: flux_u1, flux_v1 |
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| 128 | |
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| 129 | REAL, DIMENSION(klon), INTENT(OUT) :: alb3 |
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| 130 | REAL, DIMENSION(klon), INTENT(OUT) :: qsnow !column water in snow [kg/m2] |
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| 131 | REAL, DIMENSION(klon), INTENT(OUT) :: snowhgt !Snow height (m) |
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| 132 | REAL, DIMENSION(klon), INTENT(OUT) :: to_ice |
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| 133 | REAL, DIMENSION(klon), INTENT(OUT) :: sissnow |
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| 134 | REAL, DIMENSION(klon), INTENT(OUT) :: runoff !Land ice runoff |
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| 135 | #ifdef ISO |
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| 136 | REAL, DIMENSION(ntiso,klon), INTENT(OUT) :: xtevap |
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| 137 | ! real, DIMENSION(niso,klon) :: xtrun_off_lic_0_diag ! est une variable globale de |
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| 138 | ! fonte_neige |
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| 139 | #endif |
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| 140 | |
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| 141 | |
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| 142 | ! Local variables |
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| 143 | !**************************************************************************************** |
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| 144 | REAL, DIMENSION(klon) :: soilcap, soilflux |
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| 145 | REAL, DIMENSION(klon) :: cal, beta, dif_grnd |
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| 146 | REAL, DIMENSION(klon) :: zfra, alb_neig |
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| 147 | REAL, DIMENSION(klon) :: radsol |
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| 148 | REAL, DIMENSION(klon) :: u0, v0, u1_lay, v1_lay, ustar |
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| 149 | INTEGER :: i,j,nt |
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| 150 | REAL, DIMENSION(klon) :: fqfonte,ffonte |
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| 151 | REAL, DIMENSION(klon) :: run_off_lic_frac |
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| 152 | #ifdef ISO |
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| 153 | REAL, PARAMETER :: t_coup = 273.15 |
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| 154 | REAL, DIMENSION(klon) :: fqfonte_diag |
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| 155 | REAL, DIMENSION(klon) :: fq_fonte_diag |
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| 156 | REAL, DIMENSION(klon) :: snow_evap_diag |
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| 157 | REAL, DIMENSION(klon) :: fqcalving_diag |
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| 158 | REAL max_eau_sol_diag |
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| 159 | REAL, DIMENSION(klon) :: runoff_diag |
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| 160 | REAL, DIMENSION(klon) :: run_off_lic_diag |
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| 161 | REAL :: coeff_rel_diag |
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| 162 | INTEGER :: ixt |
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| 163 | REAL, DIMENSION(niso,klon) :: xtsnow_prec,xtsol_prec |
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| 164 | REAL, DIMENSION(klon) :: snow_prec,qsol_prec |
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| 165 | ! real, DIMENSION(klon) :: run_off_lic_0_diag |
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| 166 | #endif |
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| 167 | |
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| 168 | |
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| 169 | REAL, DIMENSION(klon) :: emis_new !Emissivity |
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| 170 | REAL, DIMENSION(klon) :: swdown,lwdown |
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| 171 | REAL, DIMENSION(klon) :: precip_snow_adv, snow_adv !Snow Drift precip./advection (not used in inlandsis) |
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| 172 | REAL, DIMENSION(klon) :: erod !erosion of surface snow (flux, kg/m2/s like evap) |
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| 173 | REAL, DIMENSION(klon) :: zsl_height, wind_velo !surface layer height, wind spd |
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| 174 | REAL, DIMENSION(klon) :: dens_air, snow_cont_air !air density; snow content air |
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| 175 | REAL, DIMENSION(klon) :: alb_soil !albedo of underlying ice |
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| 176 | REAL, DIMENSION(klon) :: pexner !Exner potential |
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| 177 | REAL :: pref |
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| 178 | REAL, DIMENSION(klon,nsoilmx) :: tsoil0 !modif |
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| 179 | REAL :: dtis ! subtimestep |
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| 180 | LOGICAL :: debut_is, lafin_is ! debut and lafin for inlandsis |
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| 181 | |
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| 182 | CHARACTER (len = 20) :: modname = 'surf_landice' |
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| 183 | CHARACTER (len = 80) :: abort_message |
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| 184 | |
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| 185 | |
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| 186 | REAL,DIMENSION(klon) :: alb1,alb2 |
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| 187 | REAL :: time_tempsmooth,coef_tempsmooth |
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| 188 | REAL,DIMENSION(klon) :: precip_totsnow, evap_totsnow |
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| 189 | REAL, DIMENSION (klon,6) :: alb6 |
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| 190 | REAL :: esalt |
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| 191 | REAL :: lambdasalt,fluxsalt, csalt, nunu, aa, bb, cc |
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| 192 | REAL :: tau_dens, maxerosion |
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| 193 | REAL, DIMENSION(klon) :: ws1, rhod, rhos, ustart0, ustart, qsalt, hsalt |
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| 194 | REAL, DIMENSION(klon) :: fluxbs_1, fluxbs_2, bsweight_fresh |
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| 195 | LOGICAL, DIMENSION(klon) :: ok_remaining_freshsnow |
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| 196 | REAL :: ta1, ta2, ta3, z01, z02, z03, coefa, coefb, coefc, coefd |
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| 197 | |
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| 198 | |
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| 199 | ! End definition |
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| 200 | !**************************************************************************************** |
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| 201 | !FC |
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| 202 | !FC |
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| 203 | REAL,SAVE :: alb_vis_sno_lic |
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| 204 | !$OMP THREADPRIVATE(alb_vis_sno_lic) |
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| 205 | REAL,SAVE :: alb_nir_sno_lic |
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| 206 | !$OMP THREADPRIVATE(alb_nir_sno_lic) |
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| 207 | LOGICAL, SAVE :: firstcall = .TRUE. |
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| 208 | !$OMP THREADPRIVATE(firstcall) |
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| 209 | |
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| 210 | |
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| 211 | !FC firtscall initializations |
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| 212 | !****************************************************************************************** |
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| 213 | #ifdef ISO |
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| 214 | #ifdef ISOVERIF |
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| 215 | ! write(*,*) 'surf_land_ice 1499' |
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| 216 | DO i=1,knon |
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| 217 | IF (iso_eau > 0) THEN |
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| 218 | CALL iso_verif_egalite_choix(xtsnow(iso_eau,i),snow(i), & |
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| 219 | & 'surf_land_ice 126',errmax,errmaxrel) |
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| 220 | ENDIF !IF (iso_eau > 0) THEN |
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| 221 | ENDDO !DO i=1,knon |
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| 222 | #endif |
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| 223 | #endif |
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| 224 | |
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| 225 | IF (firstcall) THEN |
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| 226 | alb_vis_sno_lic=0.77 |
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| 227 | CALL getin_p('alb_vis_sno_lic',alb_vis_sno_lic) |
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| 228 | PRINT*, 'alb_vis_sno_lic',alb_vis_sno_lic |
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| 229 | alb_nir_sno_lic=0.77 |
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| 230 | CALL getin_p('alb_nir_sno_lic',alb_nir_sno_lic) |
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| 231 | PRINT*, 'alb_nir_sno_lic',alb_nir_sno_lic |
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| 232 | |
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| 233 | DO j=1,knon |
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| 234 | i = knindex(j) |
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| 235 | tempsmoothlic(i) = temp_air(j) |
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| 236 | ENDDO |
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| 237 | firstcall=.false. |
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| 238 | ENDIF |
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| 239 | !****************************************************************************************** |
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| 240 | |
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| 241 | ! Initialize output variables |
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| 242 | alb3(:) = 999999. |
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| 243 | alb2(:) = 999999. |
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| 244 | alb1(:) = 999999. |
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| 245 | fluxbs(:)=0. |
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| 246 | runoff(:) = 0. |
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| 247 | !**************************************************************************************** |
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| 248 | ! Calculate total absorbed radiance at surface |
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| 249 | ! |
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| 250 | !**************************************************************************************** |
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| 251 | radsol(:) = 0.0 |
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| 252 | radsol(1:knon) = swnet(1:knon) + lwnet(1:knon) |
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| 253 | |
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| 254 | !**************************************************************************************** |
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| 255 | |
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| 256 | !**************************************************************************************** |
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| 257 | ! landice_opt = 0 : soil_model, calcul_flux, fonte_neige, ... |
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| 258 | ! landice_opt = 1 : prepare and call INterace Lmdz SISvat (INLANDSIS) |
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| 259 | !**************************************************************************************** |
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| 260 | |
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| 261 | |
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| 262 | IF (landice_opt .EQ. 1) THEN |
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| 263 | |
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| 264 | !**************************************************************************************** |
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| 265 | ! CALL to INLANDSIS interface |
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| 266 | !**************************************************************************************** |
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| 267 | IF (CPPKEY_INLANDSIS) THEN |
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| 268 | |
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| 269 | #ifdef ISO |
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| 270 | CALL abort_physic('surf_landice 235','isotopes pas dans INLANDSIS',1) |
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| 271 | #endif |
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| 272 | |
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| 273 | debut_is=debut |
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| 274 | lafin_is=.false. |
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| 275 | ! Suppose zero surface speed |
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| 276 | u0(:) = 0.0 |
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| 277 | v0(:) = 0.0 |
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| 278 | |
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| 279 | |
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| 280 | CALL calcul_flux_wind(knon, dtime, & |
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| 281 | u0, v0, u1, v1, gustiness, cdragm, & |
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| 282 | AcoefU, AcoefV, BcoefU, BcoefV, & |
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| 283 | p1lay, temp_air, & |
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| 284 | flux_u1, flux_v1) |
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| 285 | |
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| 286 | |
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| 287 | ! Set constants and compute some input for SISVAT |
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| 288 | ! = 1000 hPa |
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| 289 | ! and calculate incoming flux for SW and LW interval: swdown, lwdown |
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| 290 | swdown(:) = 0.0 |
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| 291 | lwdown(:) = 0.0 |
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| 292 | snow_cont_air(:) = 0. ! the snow content in air is not a prognostic variable of the model |
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| 293 | alb_soil(:) = 0.4 ! before albedo(:) but here it is the ice albedo that we have to set |
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| 294 | ustar(:) = 0. |
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| 295 | pref = 100000. |
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| 296 | DO i = 1, knon |
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| 297 | swdown(i) = swnet(i)/(1-albedo(i)) |
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| 298 | lwdown(i) = lwdownm(i) |
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| 299 | wind_velo(i) = u1(i)**2 + v1(i)**2 |
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| 300 | wind_velo(i) = wind_velo(i)**0.5 |
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| 301 | pexner(i) = (p1lay(i)/pref)**(RD/RCPD) |
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| 302 | dens_air(i) = p1lay(i)/RD/temp_air(i) ! dry air density |
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| 303 | zsl_height(i) = pphi1(i)/RG |
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| 304 | tsoil0(i,:) = tsoil(i,:) |
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| 305 | ustar(i)= (cdragm(i)*(wind_velo(i)**2))**0.5 |
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| 306 | END DO |
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| 307 | |
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| 308 | |
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| 309 | |
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| 310 | dtis=dtime |
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| 311 | |
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| 312 | IF (lafin) THEN |
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| 313 | lafin_is=.true. |
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| 314 | END IF |
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| 315 | |
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| 316 | CALL surf_inlandsis(knon, rlon, rlat, knindex, itime, dtis, debut_is, lafin_is,& |
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| 317 | rmu0, swdown, lwdown, albedo, pexner, ps, p1lay, precip_rain, precip_snow, & |
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| 318 | zsl_height, wind_velo, ustar, temp_air, dens_air, spechum, tsurf,& |
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| 319 | rugoro, snow_cont_air, alb_soil, alt, slope, cloudf, & |
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| 320 | radsol, qsol, tsoil0, snow, zfra, snowhgt, qsnow, to_ice, sissnow,agesno, & |
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| 321 | AcoefH, AcoefQ, BcoefH, BcoefQ, cdragm, cdragh, & |
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| 322 | run_off_lic, fqfonte, ffonte, evap, erod, fluxsens, fluxlat,dflux_s, dflux_l, & |
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| 323 | tsurf_new, alb1, alb2, alb3, alb6, & |
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| 324 | emis_new, z0m, z0h, qsurf) |
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| 325 | |
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| 326 | debut_is=.false. |
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| 327 | |
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| 328 | |
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| 329 | ! Treatment of snow melting and calving |
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| 330 | |
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| 331 | ! for consistency with standard LMDZ, add calving to run_off_lic |
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| 332 | run_off_lic(:)=run_off_lic(:) + to_ice(:) |
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| 333 | |
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| 334 | DO i = 1, knon |
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| 335 | ffonte_global(knindex(i),is_lic) = ffonte(i) |
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| 336 | fqfonte_global(knindex(i),is_lic) = fqfonte(i)! net melting= melting - refreezing |
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| 337 | fqcalving_global(knindex(i),is_lic) = to_ice(i) ! flux |
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| 338 | runofflic_global(knindex(i)) = run_off_lic(i) |
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| 339 | ENDDO |
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| 340 | ! Here, we assume that the calving term is equal to the to_ice term |
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| 341 | ! (no ice accumulation) |
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| 342 | |
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| 343 | |
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| 344 | ELSE |
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| 345 | abort_message='Pb de coherence: landice_opt = 1 mais CPP_INLANDSIS = .false.' |
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| 346 | CALL abort_physic(modname,abort_message,1) |
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| 347 | END IF |
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| 348 | |
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| 349 | |
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| 350 | ELSE |
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| 351 | |
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| 352 | !**************************************************************************************** |
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| 353 | ! Soil calculations |
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| 354 | ! |
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| 355 | !**************************************************************************************** |
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| 356 | |
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| 357 | ! EV: use calbeta |
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| 358 | CALL calbeta(dtime, is_lic, knon, snow, qsol, beta, cal, dif_grnd) |
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| 359 | |
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| 360 | |
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| 361 | ! use soil model and recalculate properly cal |
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| 362 | IF (soil_model) THEN |
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| 363 | CALL soil(dtime, is_lic, knon, snow, tsurf, qsol, & |
|---|
| 364 | & longitude(knindex(1:knon)), latitude(knindex(1:knon)), tsoil, soilcap, soilflux) |
|---|
| 365 | cal(1:knon) = RCPD / soilcap(1:knon) |
|---|
| 366 | radsol(1:knon) = radsol(1:knon) + soilflux(1:knon) |
|---|
| 367 | ELSE |
|---|
| 368 | cal = RCPD * calice |
|---|
| 369 | WHERE (snow > 0.0) cal = RCPD * calsno |
|---|
| 370 | ENDIF |
|---|
| 371 | |
|---|
| 372 | |
|---|
| 373 | !**************************************************************************************** |
|---|
| 374 | ! Calulate fluxes |
|---|
| 375 | ! |
|---|
| 376 | !**************************************************************************************** |
|---|
| 377 | ! beta(:) = 1.0 |
|---|
| 378 | ! dif_grnd(:) = 0.0 |
|---|
| 379 | |
|---|
| 380 | ! Suppose zero surface speed |
|---|
| 381 | u0(:)=0.0 |
|---|
| 382 | v0(:)=0.0 |
|---|
| 383 | u1_lay(:) = u1(:) - u0(:) |
|---|
| 384 | v1_lay(:) = v1(:) - v0(:) |
|---|
| 385 | |
|---|
| 386 | CALL calcul_fluxs(knon, is_lic, dtime, & |
|---|
| 387 | tsurf, p1lay, cal, beta, cdragh, cdragh, ps, & |
|---|
| 388 | precip_rain, precip_snow, snow, qsurf, & |
|---|
| 389 | radsol, dif_grnd, temp_air, spechum, u1_lay, v1_lay, gustiness, & |
|---|
| 390 | 1.,AcoefH, AcoefQ, BcoefH, BcoefQ, & |
|---|
| 391 | tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l) |
|---|
| 392 | |
|---|
| 393 | #ifdef ISO |
|---|
| 394 | #ifdef ISOVERIF |
|---|
| 395 | !write(*,*) 'surf_land_ice 1499' |
|---|
| 396 | DO i=1,knon |
|---|
| 397 | IF (iso_eau > 0) THEN |
|---|
| 398 | IF (snow(i) > ridicule) THEN |
|---|
| 399 | CALL iso_verif_egalite_choix(xtsnow(iso_eau,i),snow(i), & |
|---|
| 400 | & 'surf_land_ice 1151',errmax,errmaxrel) |
|---|
| 401 | ENDIF !IF ((snow(i) > ridicule)) THEN |
|---|
| 402 | ENDIF !IF (iso_eau > 0) THEN |
|---|
| 403 | ENDDO !DO i=1,knon |
|---|
| 404 | #endif |
|---|
| 405 | |
|---|
| 406 | DO i=1,knon |
|---|
| 407 | snow_prec(i)=snow(i) |
|---|
| 408 | DO ixt=1,niso |
|---|
| 409 | xtsnow_prec(ixt,i)=xtsnow(ixt,i) |
|---|
| 410 | ENDDO !DO ixt=1,niso |
|---|
| 411 | ! initialisation: |
|---|
| 412 | fq_fonte_diag(i)=0.0 |
|---|
| 413 | fqfonte_diag(i)=0.0 |
|---|
| 414 | snow_evap_diag(i)=0.0 |
|---|
| 415 | ENDDO !DO i=1,knon |
|---|
| 416 | #endif |
|---|
| 417 | |
|---|
| 418 | CALL calcul_flux_wind(knon, dtime, & |
|---|
| 419 | u0, v0, u1, v1, gustiness, cdragm, & |
|---|
| 420 | AcoefU, AcoefV, BcoefU, BcoefV, & |
|---|
| 421 | p1lay, temp_air, & |
|---|
| 422 | flux_u1, flux_v1) |
|---|
| 423 | |
|---|
| 424 | |
|---|
| 425 | !**************************************************************************************** |
|---|
| 426 | ! Calculate albedo |
|---|
| 427 | ! |
|---|
| 428 | !**************************************************************************************** |
|---|
| 429 | |
|---|
| 430 | ! |
|---|
| 431 | !IM: plusieurs choix/tests sur l'albedo des "glaciers continentaux" |
|---|
| 432 | ! alb1(1 : knon) = 0.6 !IM cf FH/GK |
|---|
| 433 | ! alb1(1 : knon) = 0.82 |
|---|
| 434 | ! alb1(1 : knon) = 0.77 !211003 Ksta0.77 |
|---|
| 435 | ! alb1(1 : knon) = 0.8 !KstaTER0.8 & LMD_ARMIP5 |
|---|
| 436 | !IM: KstaTER0.77 & LMD_ARMIP6 |
|---|
| 437 | |
|---|
| 438 | ! Attantion: alb1 and alb2 are not the same! |
|---|
| 439 | alb1(1:knon) = alb_vis_sno_lic |
|---|
| 440 | alb2(1:knon) = alb_nir_sno_lic |
|---|
| 441 | |
|---|
| 442 | |
|---|
| 443 | !**************************************************************************************** |
|---|
| 444 | ! Rugosity |
|---|
| 445 | ! |
|---|
| 446 | !**************************************************************************************** |
|---|
| 447 | |
|---|
| 448 | if (z0m_landice .GT. 0.) then |
|---|
| 449 | z0m(1:knon) = z0m_landice |
|---|
| 450 | z0h(1:knon) = z0h_landice |
|---|
| 451 | else |
|---|
| 452 | ! parameterization of z0=f(T) following measurements in Adelie Land by Amory et al 2017 |
|---|
| 453 | coefa = 0.1658 !0.1862 !Ant |
|---|
| 454 | coefb = -50.3869 !-55.7718 !Ant |
|---|
| 455 | ta1 = 253.15 !255. Ant |
|---|
| 456 | ta2 = 273.15 |
|---|
| 457 | ta3 = 273.15+3 |
|---|
| 458 | z01 = exp(coefa*ta1 + coefb) !~0.2 ! ~0.25 mm |
|---|
| 459 | z02 = exp(coefa*ta2 + coefb) !~6 !~7 mm |
|---|
| 460 | z03 = z01 |
|---|
| 461 | coefc = log(z03/z02)/(ta3-ta2) |
|---|
| 462 | coefd = log(z03)-coefc*ta3 |
|---|
| 463 | time_tempsmooth=2.*86400. |
|---|
| 464 | coef_tempsmooth=min(1.,dtime/time_tempsmooth) |
|---|
| 465 | !coef_tempsmooth=0. |
|---|
| 466 | do j=1,knon |
|---|
| 467 | i=knindex(j) |
|---|
| 468 | tempsmoothlic(i)=temp_air(j)*coef_tempsmooth+tempsmoothlic(i)*(1.-coef_tempsmooth) |
|---|
| 469 | if (tempsmoothlic(i) .lt. ta1) then |
|---|
| 470 | z0m(j) = z01 |
|---|
| 471 | else if (tempsmoothlic(i).ge.ta1 .and. tempsmoothlic(i).lt.ta2) then |
|---|
| 472 | z0m(j) = exp(coefa*tempsmoothlic(i) + coefb) |
|---|
| 473 | else if (tempsmoothlic(i).ge.ta2 .and. tempsmoothlic(i).lt.ta3) then |
|---|
| 474 | ! if st > 0, melting induce smooth surface |
|---|
| 475 | z0m(j) = exp(coefc*tempsmoothlic(i) + coefd) |
|---|
| 476 | else |
|---|
| 477 | z0m(j) = z03 |
|---|
| 478 | endif |
|---|
| 479 | z0h(j)=z0m(j) |
|---|
| 480 | enddo |
|---|
| 481 | |
|---|
| 482 | endif |
|---|
| 483 | |
|---|
| 484 | |
|---|
| 485 | !**************************************************************************************** |
|---|
| 486 | ! Simple blowing snow param |
|---|
| 487 | !**************************************************************************************** |
|---|
| 488 | ! we proceed in 2 steps: |
|---|
| 489 | ! first we erode - if possible -the accumulated snow during the time step |
|---|
| 490 | ! then we update the density of the underlying layer and see if we can also erode |
|---|
| 491 | ! this layer |
|---|
| 492 | |
|---|
| 493 | |
|---|
| 494 | if (ok_bs) then |
|---|
| 495 | fluxbs(:)=0. |
|---|
| 496 | do j=1,knon |
|---|
| 497 | ws1(j)=(u1(j)**2+v1(j)**2)**0.5 |
|---|
| 498 | ustar(j)=(cdragm(j)*(u1(j)**2+v1(j)**2))**0.5 |
|---|
| 499 | rhod(j)=p1lay(j)/RD/temp_air(j) |
|---|
| 500 | ustart0(j) =(log(2.868)-log(1.625))/0.085*sqrt(cdragm(j)) |
|---|
| 501 | enddo |
|---|
| 502 | |
|---|
| 503 | ! 1st step: erosion of fresh snow accumulated during the time step |
|---|
| 504 | do j=1, knon |
|---|
| 505 | if (precip_snow(j) .GT. 0.) then |
|---|
| 506 | rhos(j)=rhofresh_bs |
|---|
| 507 | ! blowing snow flux formula used in MAR |
|---|
| 508 | ustart(j)=ustart0(j)*exp(max(rhoice_bs/rhofresh_bs-rhoice_bs/rhos(j),0.))*exp(max(0.,rhos(j)-rhohard_bs)) |
|---|
| 509 | ! we have multiplied by exp to prevent erosion when rhos>rhohard_bs |
|---|
| 510 | ! computation of qbs at the top of the saltation layer |
|---|
| 511 | ! default formulation from MAR model (Amory et al. 2021, Gallee et al. 2001) |
|---|
| 512 | esalt=1./(c_esalt_bs*max(1.e-6,ustar(j))) |
|---|
| 513 | hsalt(j)=0.08436*(max(1.e-6,ustar(j))**1.27) |
|---|
| 514 | qsalt(j)=(max(ustar(j)**2-ustart(j)**2,0.))/(RG*hsalt(j))*esalt |
|---|
| 515 | ! calculation of erosion (flux positive towards the surface here) |
|---|
| 516 | ! consistent with implicit resolution of turbulent mixing equation |
|---|
| 517 | ! Nemoto and Nishimura 2004 show that steady-state saltation is achieved within a time tau_eqsalt_bs of about 10s |
|---|
| 518 | ! we thus prevent snowerosion (snow particle transfer from the saltation layer to the first model level) |
|---|
| 519 | ! integrated over tau_eqsalt_bs to exceed the total mass of snow particle in the saltation layer |
|---|
| 520 | ! (rho*qsalt*hsalt) |
|---|
| 521 | ! during this first step we also lower bound the erosion to the amount of fresh snow accumulated during the time step |
|---|
| 522 | maxerosion=min(precip_snow(j),hsalt(j)*qsalt(j)*rhod(j)/tau_eqsalt_bs) |
|---|
| 523 | |
|---|
| 524 | fluxbs_1(j)=rhod(j)*ws1(j)*cdragh(j)*zeta_bs*(AcoefQBS(j)-qsalt(j)) & |
|---|
| 525 | / (1.-rhod(j)*ws1(j)*cdragh(j)*zeta_bs*BcoefQBS(j)*dtime) |
|---|
| 526 | fluxbs_1(j)=max(-maxerosion,fluxbs_1(j)) |
|---|
| 527 | |
|---|
| 528 | if (precip_snow(j) .gt. abs(fluxbs_1(j))) then |
|---|
| 529 | ok_remaining_freshsnow(j)=.true. |
|---|
| 530 | bsweight_fresh(j)=1. |
|---|
| 531 | else |
|---|
| 532 | ok_remaining_freshsnow(j)=.false. |
|---|
| 533 | bsweight_fresh(j)=exp(-(abs(fluxbs_1(j))-precip_snow(j))/precip_snow(j)) |
|---|
| 534 | endif |
|---|
| 535 | else |
|---|
| 536 | ok_remaining_freshsnow(j)=.false. |
|---|
| 537 | fluxbs_1(j)=0. |
|---|
| 538 | bsweight_fresh(j)=0. |
|---|
| 539 | endif |
|---|
| 540 | enddo |
|---|
| 541 | |
|---|
| 542 | |
|---|
| 543 | ! we now compute the snow age of the overlying layer (snow surface after erosion of the fresh snow accumulated during the time step) |
|---|
| 544 | ! this is done through the routine albsno |
|---|
| 545 | CALL albsno(klon,knon,dtime,agesno(:),alb_neig(:), precip_snow(:)+fluxbs_1(:)) |
|---|
| 546 | |
|---|
| 547 | ! 2nd step: |
|---|
| 548 | ! computation of threshold friction velocity |
|---|
| 549 | ! which depends on surface snow density |
|---|
| 550 | do j = 1, knon |
|---|
| 551 | if (ok_remaining_freshsnow(j)) then |
|---|
| 552 | fluxbs_2(j)=0. |
|---|
| 553 | else |
|---|
| 554 | ! we start eroding the underlying layer |
|---|
| 555 | ! estimation of snow density |
|---|
| 556 | ! snow density increases with snow age and |
|---|
| 557 | ! increases even faster in case of sedimentation of blowing snow or rain |
|---|
| 558 | tau_dens=max(tau_densmin_bs, tau_dens0_bs*exp(-abs(precip_bs(j))/pbst_bs - & |
|---|
| 559 | abs(precip_rain(j))/prt_bs)*exp(-max(tsurf(j)-RTT,0.))) |
|---|
| 560 | rhos(j)=rhofresh_bs+(rhohard_bs-rhofresh_bs)*(1.-exp(-agesno(j)*86400.0/tau_dens)) |
|---|
| 561 | ! blowing snow flux formula used in MAR |
|---|
| 562 | ustart(j)=ustart0(j)*exp(max(rhoice_bs/rhofresh_bs-rhoice_bs/rhos(j),0.))*exp(max(0.,rhos(j)-rhohard_bs)) |
|---|
| 563 | ! we have multiplied by exp to prevent erosion when rhos>rhohard_bs |
|---|
| 564 | ! computation of qbs at the top of the saltation layer |
|---|
| 565 | ! default formulation from MAR model (Amory et al. 2021, Gallee et al. 2001) |
|---|
| 566 | esalt=1./(c_esalt_bs*max(1.e-6,ustar(j))) |
|---|
| 567 | hsalt(j)=0.08436*(max(1.e-6,ustar(j))**1.27) |
|---|
| 568 | qsalt(j)=(max(ustar(j)**2-ustart(j)**2,0.))/(RG*hsalt(j))*esalt |
|---|
| 569 | ! calculation of erosion (flux positive towards the surface here) |
|---|
| 570 | ! consistent with implicit resolution of turbulent mixing equation |
|---|
| 571 | ! Nemoto and Nishimura 2004 show that steady-state saltation is achieved within a time tau_eqsalt_bs of about 10s |
|---|
| 572 | ! we thus prevent snowerosion (snow particle transfer from the saltation layer to the first model level) |
|---|
| 573 | ! integrated over tau_eqsalt_bs to exceed the total mass of snow particle in the saltation layer |
|---|
| 574 | ! (rho*qsalt*hsalt) |
|---|
| 575 | maxerosion=hsalt(j)*qsalt(j)*rhod(j)/tau_eqsalt_bs |
|---|
| 576 | fluxbs_2(j)=rhod(j)*ws1(j)*cdragh(j)*zeta_bs*(AcoefQBS(j)-qsalt(j)) & |
|---|
| 577 | / (1.-rhod(j)*ws1(j)*cdragh(j)*zeta_bs*BcoefQBS(j)*dtime) |
|---|
| 578 | fluxbs_2(j)=max(-maxerosion,fluxbs_2(j)) |
|---|
| 579 | endif |
|---|
| 580 | enddo |
|---|
| 581 | |
|---|
| 582 | |
|---|
| 583 | |
|---|
| 584 | |
|---|
| 585 | ! final flux and outputs |
|---|
| 586 | do j=1, knon |
|---|
| 587 | ! total flux is the erosion of fresh snow + |
|---|
| 588 | ! a fraction of the underlying snow (if all the fresh snow has been eroded) |
|---|
| 589 | ! the calculation of the fraction is quite delicate since we do not know |
|---|
| 590 | ! how much time was needed to erode the fresh snow. We assume that this time |
|---|
| 591 | ! is dt*exp(-(abs(fluxbs1)-precipsnow)/precipsnow)=dt*bsweight_fresh |
|---|
| 592 | |
|---|
| 593 | fluxbs(j)=fluxbs_1(j)+fluxbs_2(j)*(1.-bsweight_fresh(j)) |
|---|
| 594 | i = knindex(j) |
|---|
| 595 | zxustartlic(i) = ustart(j) |
|---|
| 596 | zxrhoslic(i) = rhos(j) |
|---|
| 597 | zxqsaltlic(i)=qsalt(j) |
|---|
| 598 | enddo |
|---|
| 599 | |
|---|
| 600 | |
|---|
| 601 | else ! not ok_bs |
|---|
| 602 | ! those lines are useful to calculate the snow age |
|---|
| 603 | CALL albsno(klon,knon,dtime,agesno(:),alb_neig(:), precip_snow(:)) |
|---|
| 604 | |
|---|
| 605 | endif ! if ok_bs |
|---|
| 606 | |
|---|
| 607 | |
|---|
| 608 | |
|---|
| 609 | !**************************************************************************************** |
|---|
| 610 | ! Calculate snow amount |
|---|
| 611 | ! |
|---|
| 612 | !**************************************************************************************** |
|---|
| 613 | IF (ok_bs) THEN |
|---|
| 614 | precip_totsnow(:)=precip_snow(:)+precip_bs(:) |
|---|
| 615 | evap_totsnow(:)=evap(:)-fluxbs(:) ! flux bs is positive towards the surface (snow erosion) |
|---|
| 616 | ELSE |
|---|
| 617 | precip_totsnow(:)=precip_snow(:) |
|---|
| 618 | evap_totsnow(:)=evap(:) |
|---|
| 619 | ENDIF |
|---|
| 620 | |
|---|
| 621 | |
|---|
| 622 | CALL fonte_neige(knon, is_lic, knindex, dtime, & |
|---|
| 623 | tsurf, precip_rain, precip_totsnow, & |
|---|
| 624 | snow, qsol, tsurf_new, evap_totsnow & |
|---|
| 625 | #ifdef ISO |
|---|
| 626 | & ,fq_fonte_diag,fqfonte_diag,snow_evap_diag,fqcalving_diag & |
|---|
| 627 | & ,max_eau_sol_diag,runoff_diag,run_off_lic_diag,coeff_rel_diag & |
|---|
| 628 | #endif |
|---|
| 629 | & ) |
|---|
| 630 | |
|---|
| 631 | |
|---|
| 632 | #ifdef ISO |
|---|
| 633 | #ifdef ISOVERIF |
|---|
| 634 | DO i=1,knon |
|---|
| 635 | IF (iso_eau > 0) THEN |
|---|
| 636 | CALL iso_verif_egalite_choix(Rland_ice(iso_eau,i),1.0, & |
|---|
| 637 | & 'surf_landice_mod 217',errmax,errmaxrel) |
|---|
| 638 | ENDIF !IF (iso_eau > 0) THEN |
|---|
| 639 | ENDDO !DO i=1,knon |
|---|
| 640 | #endif |
|---|
| 641 | |
|---|
| 642 | CALL calcul_iso_surf_lic_vectall(klon,knon, & |
|---|
| 643 | & evap,snow_evap_diag,Tsurf_new,snow, & |
|---|
| 644 | & fq_fonte_diag,fqfonte_diag,dtime,t_coup, & |
|---|
| 645 | & precip_snow,xtprecip_snow,precip_rain,xtprecip_rain, snow_prec,xtsnow_prec, & |
|---|
| 646 | & xtspechum,spechum,ps,Rland_ice, & |
|---|
| 647 | & xtevap,xtsnow,fqcalving_diag, & |
|---|
| 648 | & knindex,is_lic,run_off_lic_diag,coeff_rel_diag & |
|---|
| 649 | & ) |
|---|
| 650 | |
|---|
| 651 | ! call fonte_neige_export_xtrun_off_lic_0(knon,xtrun_off_lic_0_diag) |
|---|
| 652 | |
|---|
| 653 | #endif |
|---|
| 654 | |
|---|
| 655 | WHERE (snow(1 : knon) .LT. 0.0001) agesno(1 : knon) = 0. |
|---|
| 656 | zfra(1:knon) = MAX(0.0,MIN(1.0,snow(1:knon)/(snow(1:knon)+10.0))) |
|---|
| 657 | |
|---|
| 658 | |
|---|
| 659 | END IF ! landice_opt |
|---|
| 660 | |
|---|
| 661 | |
|---|
| 662 | !**************************************************************************************** |
|---|
| 663 | ! Send run-off on land-ice to coupler if coupled ocean. |
|---|
| 664 | ! run_off_lic has been calculated in fonte_neige or surf_inlandsis |
|---|
| 665 | ! If landice_opt>=2, corresponding call is done from surf_land_orchidee |
|---|
| 666 | !**************************************************************************************** |
|---|
| 667 | IF (type_ocean=='couple' .AND. landice_opt .LT. 2) THEN |
|---|
| 668 | ! Compress fraction where run_off_lic is active (here all pctsrf(is_lic)) |
|---|
| 669 | run_off_lic_frac(:)=0.0 |
|---|
| 670 | DO j = 1, knon |
|---|
| 671 | i = knindex(j) |
|---|
| 672 | run_off_lic_frac(j) = pctsrf(i,is_lic) |
|---|
| 673 | ENDDO |
|---|
| 674 | |
|---|
| 675 | CALL cpl_send_landice_fields(itime, knon, knindex, run_off_lic, run_off_lic_frac) |
|---|
| 676 | ENDIF |
|---|
| 677 | |
|---|
| 678 | ! transfer runoff rate [kg/m2/s](!) to physiq for output |
|---|
| 679 | runoff(1:knon)=run_off_lic(1:knon)/dtime |
|---|
| 680 | |
|---|
| 681 | snow_o=0. |
|---|
| 682 | zfra_o = 0. |
|---|
| 683 | DO j = 1, knon |
|---|
| 684 | i = knindex(j) |
|---|
| 685 | snow_o(i) = snow(j) |
|---|
| 686 | zfra_o(i) = zfra(j) |
|---|
| 687 | ENDDO |
|---|
| 688 | |
|---|
| 689 | |
|---|
| 690 | !albedo SB >>> |
|---|
| 691 | select case(NSW) |
|---|
| 692 | case(2) |
|---|
| 693 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 694 | alb_dir(1:knon,2)=alb2(1:knon) |
|---|
| 695 | case(4) |
|---|
| 696 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 697 | alb_dir(1:knon,2)=alb2(1:knon) |
|---|
| 698 | alb_dir(1:knon,3)=alb2(1:knon) |
|---|
| 699 | alb_dir(1:knon,4)=alb2(1:knon) |
|---|
| 700 | case(6) |
|---|
| 701 | alb_dir(1:knon,1)=alb1(1:knon) |
|---|
| 702 | alb_dir(1:knon,2)=alb1(1:knon) |
|---|
| 703 | alb_dir(1:knon,3)=alb1(1:knon) |
|---|
| 704 | alb_dir(1:knon,4)=alb2(1:knon) |
|---|
| 705 | alb_dir(1:knon,5)=alb2(1:knon) |
|---|
| 706 | alb_dir(1:knon,6)=alb2(1:knon) |
|---|
| 707 | |
|---|
| 708 | IF ((landice_opt .EQ. 1) .AND. (iflag_albcalc .EQ. 2)) THEN |
|---|
| 709 | alb_dir(1:knon,1)=alb6(1:knon,1) |
|---|
| 710 | alb_dir(1:knon,2)=alb6(1:knon,2) |
|---|
| 711 | alb_dir(1:knon,3)=alb6(1:knon,3) |
|---|
| 712 | alb_dir(1:knon,4)=alb6(1:knon,4) |
|---|
| 713 | alb_dir(1:knon,5)=alb6(1:knon,5) |
|---|
| 714 | alb_dir(1:knon,6)=alb6(1:knon,6) |
|---|
| 715 | ENDIF |
|---|
| 716 | |
|---|
| 717 | end select |
|---|
| 718 | alb_dif=alb_dir |
|---|
| 719 | !albedo SB <<< |
|---|
| 720 | |
|---|
| 721 | |
|---|
| 722 | END SUBROUTINE surf_landice |
|---|
| 723 | ! |
|---|
| 724 | !**************************************************************************************** |
|---|
| 725 | ! |
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| 726 | END MODULE surf_landice_mod |
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| 727 | |
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| 728 | |
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| 729 | |
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