[782] | 1 | ! |
---|
| 2 | ! $Header$ |
---|
| 3 | ! |
---|
| 4 | MODULE calcul_fluxs_mod |
---|
| 5 | |
---|
| 6 | |
---|
| 7 | CONTAINS |
---|
| 8 | SUBROUTINE calcul_fluxs( knon, nisurf, dtime, & |
---|
| 9 | tsurf, p1lay, cal, beta, coef1lay, ps, & |
---|
| 10 | precip_rain, precip_snow, snow, qsurf, & |
---|
| 11 | radsol, dif_grnd, t1lay, q1lay, u1lay, v1lay, & |
---|
| 12 | petAcoef, peqAcoef, petBcoef, peqBcoef, & |
---|
| 13 | tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l) |
---|
| 14 | |
---|
| 15 | USE dimphy, ONLY : klon |
---|
| 16 | |
---|
| 17 | ! Cette routine calcule les fluxs en h et q a l'interface et eventuellement |
---|
| 18 | ! une temperature de surface (au cas ou ok_veget = false) |
---|
| 19 | ! |
---|
| 20 | ! L. Fairhead 4/2000 |
---|
| 21 | ! |
---|
| 22 | ! input: |
---|
| 23 | ! knon nombre de points a traiter |
---|
| 24 | ! nisurf surface a traiter |
---|
| 25 | ! tsurf temperature de surface |
---|
| 26 | ! p1lay pression 1er niveau (milieu de couche) |
---|
| 27 | ! cal capacite calorifique du sol |
---|
| 28 | ! beta evap reelle |
---|
| 29 | ! coef1lay coefficient d'echange |
---|
| 30 | ! ps pression au sol |
---|
| 31 | ! precip_rain precipitations liquides |
---|
| 32 | ! precip_snow precipitations solides |
---|
| 33 | ! snow champs hauteur de neige |
---|
| 34 | ! runoff runoff en cas de trop plein |
---|
| 35 | ! petAcoef coeff. A de la resolution de la CL pour t |
---|
| 36 | ! peqAcoef coeff. A de la resolution de la CL pour q |
---|
| 37 | ! petBcoef coeff. B de la resolution de la CL pour t |
---|
| 38 | ! peqBcoef coeff. B de la resolution de la CL pour q |
---|
| 39 | ! radsol rayonnement net aus sol (LW + SW) |
---|
| 40 | ! dif_grnd coeff. diffusion vers le sol profond |
---|
| 41 | ! |
---|
| 42 | ! output: |
---|
| 43 | ! tsurf_new temperature au sol |
---|
| 44 | ! qsurf humidite de l'air au dessus du sol |
---|
| 45 | ! fluxsens flux de chaleur sensible |
---|
| 46 | ! fluxlat flux de chaleur latente |
---|
| 47 | ! dflux_s derivee du flux de chaleur sensible / Ts |
---|
| 48 | ! dflux_l derivee du flux de chaleur latente / Ts |
---|
| 49 | ! |
---|
| 50 | |
---|
[793] | 51 | INCLUDE "YOETHF.h" |
---|
| 52 | INCLUDE "FCTTRE.h" |
---|
| 53 | INCLUDE "indicesol.h" |
---|
| 54 | INCLUDE "YOMCST.h" |
---|
[782] | 55 | |
---|
| 56 | ! Parametres d'entree |
---|
| 57 | !**************************************************************************************** |
---|
| 58 | INTEGER, INTENT(IN) :: knon, nisurf |
---|
| 59 | REAL , INTENT(IN) :: dtime |
---|
| 60 | REAL, DIMENSION(klon), INTENT(IN) :: petAcoef, peqAcoef |
---|
| 61 | REAL, DIMENSION(klon), INTENT(IN) :: petBcoef, peqBcoef |
---|
| 62 | REAL, DIMENSION(klon), INTENT(IN) :: ps, q1lay |
---|
| 63 | REAL, DIMENSION(klon), INTENT(IN) :: tsurf, p1lay, cal, beta, coef1lay |
---|
| 64 | REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow ! pas utiles |
---|
| 65 | REAL, DIMENSION(klon), INTENT(IN) :: radsol, dif_grnd |
---|
| 66 | REAL, DIMENSION(klon), INTENT(IN) :: t1lay, u1lay, v1lay |
---|
| 67 | |
---|
| 68 | ! Parametres entree-sorties |
---|
| 69 | !**************************************************************************************** |
---|
| 70 | REAL, DIMENSION(klon), INTENT(INOUT) :: snow ! snow pas utile |
---|
| 71 | |
---|
| 72 | ! Parametres sorties |
---|
| 73 | !**************************************************************************************** |
---|
| 74 | REAL, DIMENSION(klon), INTENT(OUT) :: qsurf |
---|
| 75 | REAL, DIMENSION(klon), INTENT(OUT) :: tsurf_new, evap, fluxsens, fluxlat |
---|
| 76 | REAL, DIMENSION(klon), INTENT(OUT) :: dflux_s, dflux_l |
---|
| 77 | |
---|
| 78 | ! Variables locales |
---|
| 79 | !**************************************************************************************** |
---|
| 80 | INTEGER :: i |
---|
| 81 | REAL, DIMENSION(klon) :: zx_mh, zx_nh, zx_oh |
---|
| 82 | REAL, DIMENSION(klon) :: zx_mq, zx_nq, zx_oq |
---|
| 83 | REAL, DIMENSION(klon) :: zx_pkh, zx_dq_s_dt, zx_qsat, zx_coef |
---|
| 84 | REAL, DIMENSION(klon) :: zx_sl, zx_k1 |
---|
| 85 | REAL, DIMENSION(klon) :: d_ts |
---|
| 86 | REAL :: zdelta, zcvm5, zx_qs, zcor, zx_dq_s_dh |
---|
| 87 | REAL :: qsat_new, q1_new |
---|
| 88 | REAL, PARAMETER :: t_grnd = 271.35, t_coup = 273.15 |
---|
| 89 | REAL, PARAMETER :: max_eau_sol = 150.0 |
---|
| 90 | CHARACTER (len = 20) :: modname = 'calcul_fluxs' |
---|
| 91 | LOGICAL :: fonte_neige |
---|
| 92 | LOGICAL, SAVE :: check = .FALSE. |
---|
| 93 | !$OMP THREADPRIVATE(check) |
---|
| 94 | |
---|
| 95 | ! End definition |
---|
| 96 | !**************************************************************************************** |
---|
| 97 | |
---|
| 98 | IF (check) WRITE(*,*)'Entree ', modname,' surface = ',nisurf |
---|
| 99 | |
---|
| 100 | IF (check) THEN |
---|
| 101 | WRITE(*,*)' radsol (min, max)', & |
---|
| 102 | MINVAL(radsol(1:knon)), MAXVAL(radsol(1:knon)) |
---|
| 103 | CALL flush(6) |
---|
| 104 | ENDIF |
---|
| 105 | |
---|
| 106 | ! Traitement neige et humidite du sol |
---|
| 107 | !**************************************************************************************** |
---|
| 108 | ! |
---|
| 109 | !!$ WRITE(*,*)'test calcul_flux, surface ', nisurf |
---|
| 110 | !!PB test |
---|
| 111 | !!$ if (nisurf == is_oce) then |
---|
| 112 | !!$ snow = 0. |
---|
| 113 | !!$ qsol = max_eau_sol |
---|
| 114 | !!$ else |
---|
| 115 | !!$ where (precip_snow > 0.) snow = snow + (precip_snow * dtime) |
---|
| 116 | !!$ where (snow > epsilon(snow)) snow = max(0.0, snow - (evap * dtime)) |
---|
| 117 | !!$! snow = max(0.0, snow + (precip_snow - evap) * dtime) |
---|
| 118 | !!$ where (precip_rain > 0.) qsol = qsol + (precip_rain - evap) * dtime |
---|
| 119 | !!$ endif |
---|
| 120 | !!$ IF (nisurf /= is_ter) qsol = max_eau_sol |
---|
| 121 | |
---|
| 122 | |
---|
| 123 | ! |
---|
| 124 | ! Initialisation |
---|
| 125 | !**************************************************************************************** |
---|
| 126 | evap = 0. |
---|
| 127 | fluxsens=0. |
---|
| 128 | fluxlat=0. |
---|
| 129 | dflux_s = 0. |
---|
| 130 | dflux_l = 0. |
---|
| 131 | ! |
---|
| 132 | ! zx_qs = qsat en kg/kg |
---|
| 133 | !**************************************************************************************** |
---|
| 134 | DO i = 1, knon |
---|
| 135 | zx_pkh(i) = (ps(i)/ps(i))**RKAPPA |
---|
| 136 | IF (thermcep) THEN |
---|
| 137 | zdelta=MAX(0.,SIGN(1.,rtt-tsurf(i))) |
---|
| 138 | zcvm5 = R5LES*RLVTT*(1.-zdelta) + R5IES*RLSTT*zdelta |
---|
| 139 | zcvm5 = zcvm5 / RCPD / (1.0+RVTMP2*q1lay(i)) |
---|
| 140 | zx_qs= r2es * FOEEW(tsurf(i),zdelta)/ps(i) |
---|
| 141 | zx_qs=MIN(0.5,zx_qs) |
---|
| 142 | zcor=1./(1.-retv*zx_qs) |
---|
| 143 | zx_qs=zx_qs*zcor |
---|
| 144 | zx_dq_s_dh = FOEDE(tsurf(i),zdelta,zcvm5,zx_qs,zcor) & |
---|
| 145 | /RLVTT / zx_pkh(i) |
---|
| 146 | ELSE |
---|
| 147 | IF (tsurf(i).LT.t_coup) THEN |
---|
| 148 | zx_qs = qsats(tsurf(i)) / ps(i) |
---|
| 149 | zx_dq_s_dh = dqsats(tsurf(i),zx_qs)/RLVTT & |
---|
| 150 | / zx_pkh(i) |
---|
| 151 | ELSE |
---|
| 152 | zx_qs = qsatl(tsurf(i)) / ps(i) |
---|
| 153 | zx_dq_s_dh = dqsatl(tsurf(i),zx_qs)/RLVTT & |
---|
| 154 | / zx_pkh(i) |
---|
| 155 | ENDIF |
---|
| 156 | ENDIF |
---|
| 157 | zx_dq_s_dt(i) = RCPD * zx_pkh(i) * zx_dq_s_dh |
---|
| 158 | zx_qsat(i) = zx_qs |
---|
| 159 | zx_coef(i) = coef1lay(i) * & |
---|
| 160 | (1.0+SQRT(u1lay(i)**2+v1lay(i)**2)) * & |
---|
| 161 | p1lay(i)/(RD*t1lay(i)) |
---|
| 162 | |
---|
| 163 | ENDDO |
---|
| 164 | |
---|
| 165 | |
---|
| 166 | ! === Calcul de la temperature de surface === |
---|
| 167 | ! zx_sl = chaleur latente d'evaporation ou de sublimation |
---|
| 168 | !**************************************************************************************** |
---|
| 169 | |
---|
| 170 | DO i = 1, knon |
---|
| 171 | zx_sl(i) = RLVTT |
---|
| 172 | IF (tsurf(i) .LT. RTT) zx_sl(i) = RLSTT |
---|
| 173 | zx_k1(i) = zx_coef(i) |
---|
| 174 | ENDDO |
---|
| 175 | |
---|
| 176 | |
---|
| 177 | DO i = 1, knon |
---|
| 178 | ! Q |
---|
| 179 | zx_oq(i) = 1. - (beta(i) * zx_k1(i) * peqBcoef(i) * dtime) |
---|
| 180 | zx_mq(i) = beta(i) * zx_k1(i) * & |
---|
| 181 | (peqAcoef(i) - zx_qsat(i) + & |
---|
| 182 | zx_dq_s_dt(i) * tsurf(i)) & |
---|
| 183 | / zx_oq(i) |
---|
| 184 | zx_nq(i) = beta(i) * zx_k1(i) * (-1. * zx_dq_s_dt(i)) & |
---|
| 185 | / zx_oq(i) |
---|
| 186 | |
---|
| 187 | ! H |
---|
| 188 | zx_oh(i) = 1. - (zx_k1(i) * petBcoef(i) * dtime) |
---|
| 189 | zx_mh(i) = zx_k1(i) * petAcoef(i) / zx_oh(i) |
---|
| 190 | zx_nh(i) = - (zx_k1(i) * RCPD * zx_pkh(i))/ zx_oh(i) |
---|
| 191 | |
---|
| 192 | ! Tsurface |
---|
| 193 | tsurf_new(i) = (tsurf(i) + cal(i)/(RCPD * zx_pkh(i)) * dtime * & |
---|
| 194 | (radsol(i) + zx_mh(i) + zx_sl(i) * zx_mq(i)) & |
---|
| 195 | + dif_grnd(i) * t_grnd * dtime)/ & |
---|
| 196 | ( 1. - dtime * cal(i)/(RCPD * zx_pkh(i)) * ( & |
---|
| 197 | zx_nh(i) + zx_sl(i) * zx_nq(i)) & |
---|
| 198 | + dtime * dif_grnd(i)) |
---|
| 199 | |
---|
| 200 | ! |
---|
| 201 | ! Y'a-t-il fonte de neige? |
---|
| 202 | ! |
---|
| 203 | ! fonte_neige = (nisurf /= is_oce) .AND. & |
---|
| 204 | ! & (snow(i) > epsfra .OR. nisurf == is_sic .OR. nisurf == is_lic) & |
---|
| 205 | ! & .AND. (tsurf_new(i) >= RTT) |
---|
| 206 | ! if (fonte_neige) tsurf_new(i) = RTT |
---|
| 207 | d_ts(i) = tsurf_new(i) - tsurf(i) |
---|
| 208 | ! zx_h_ts(i) = tsurf_new(i) * RCPD * zx_pkh(i) |
---|
| 209 | ! zx_q_0(i) = zx_qsat(i) + zx_dq_s_dt(i) * d_ts(i) |
---|
| 210 | |
---|
| 211 | !== flux_q est le flux de vapeur d'eau: kg/(m**2 s) positive vers bas |
---|
| 212 | !== flux_t est le flux de cpt (energie sensible): j/(m**2 s) |
---|
| 213 | evap(i) = - zx_mq(i) - zx_nq(i) * tsurf_new(i) |
---|
| 214 | fluxlat(i) = - evap(i) * zx_sl(i) |
---|
| 215 | fluxsens(i) = zx_mh(i) + zx_nh(i) * tsurf_new(i) |
---|
| 216 | |
---|
| 217 | ! Derives des flux dF/dTs (W m-2 K-1): |
---|
| 218 | dflux_s(i) = zx_nh(i) |
---|
| 219 | dflux_l(i) = (zx_sl(i) * zx_nq(i)) |
---|
| 220 | |
---|
| 221 | ! Nouvelle valeure de l'humidite au dessus du sol |
---|
| 222 | qsat_new=zx_qsat(i) + zx_dq_s_dt(i) * d_ts(i) |
---|
| 223 | q1_new = peqAcoef(i) - peqBcoef(i)*evap(i)*dtime |
---|
| 224 | qsurf(i)=q1_new*(1.-beta(i)) + beta(i)*qsat_new |
---|
| 225 | ! |
---|
| 226 | ! en cas de fonte de neige |
---|
| 227 | ! |
---|
| 228 | ! if (fonte_neige) then |
---|
| 229 | ! bilan_f = radsol(i) + fluxsens(i) - (zx_sl(i) * evap (i)) - & |
---|
| 230 | ! & dif_grnd(i) * (tsurf_new(i) - t_grnd) - & |
---|
| 231 | ! & RCPD * (zx_pkh(i))/cal(i)/dtime * (tsurf_new(i) - tsurf(i)) |
---|
| 232 | ! bilan_f = max(0., bilan_f) |
---|
| 233 | ! fq_fonte = bilan_f / zx_sl(i) |
---|
| 234 | ! snow(i) = max(0., snow(i) - fq_fonte * dtime) |
---|
| 235 | ! qsol(i) = qsol(i) + (fq_fonte * dtime) |
---|
| 236 | ! endif |
---|
| 237 | !!$ if (nisurf == is_ter) & |
---|
| 238 | !!$ & run_off(i) = run_off(i) + max(qsol(i) - max_eau_sol, 0.0) |
---|
| 239 | !!$ qsol(i) = min(qsol(i), max_eau_sol) |
---|
| 240 | ENDDO |
---|
| 241 | ! |
---|
| 242 | !**************************************************************************************** |
---|
| 243 | ! |
---|
| 244 | END SUBROUTINE calcul_fluxs |
---|
| 245 | |
---|
| 246 | END MODULE calcul_fluxs_mod |
---|