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module soil_m |
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! $Header: /home/cvsroot/LMDZ4/libf/phylmd/soil.F,v 1.1.1.1 2004/05/19 |
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! 12:53:09 lmdzadmin Exp $ |
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SUBROUTINE soil(ptimestep, indice, knon, snow, ptsrf, ptsoil, pcapcal, & |
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pfluxgrd) |
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USE dimens_m |
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USE indicesol |
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USE dimphy |
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USE dimsoil |
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USE suphec_m |
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IMPLICIT NONE |
IMPLICIT NONE |
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! ======================================================================= |
contains |
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! Auteur: Frederic Hourdin 30/01/92 |
SUBROUTINE soil(dtime, nisurf, knon, snow, tsurf, tsoil, soilcap, soilflux) |
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! ------- |
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! objet: computation of : the soil temperature evolution |
! From LMDZ4/libf/phylmd/soil.F, version 1.1.1.1 2004/05/19 |
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! ------ the surfacic heat capacity "Capcal" |
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! the surface conduction flux pcapcal |
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! Method: implicit time integration |
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! ------- |
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! Consecutive ground temperatures are related by: |
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! T(k+1) = C(k) + D(k)*T(k) (1) |
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! the coefficients C and D are computed at the t-dt time-step. |
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! Routine structure: |
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! 1)new temperatures are computed using (1) |
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! 2)C and D coefficients are computed from the new temperature |
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! profile for the t+dt time-step |
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! 3)the coefficients A and B are computed where the diffusive |
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! fluxes at the t+dt time-step is given by |
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! Fdiff = A + B Ts(t+dt) |
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! or Fdiff = F0 + Capcal (Ts(t+dt)-Ts(t))/dt |
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! with F0 = A + B (Ts(t)) |
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! Capcal = B*dt |
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! Interface: |
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! ---------- |
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! Arguments: |
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! ---------- |
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! ptimestep physical timestep (s) |
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! indice sub-surface index |
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! snow(klon,nbsrf) snow |
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! ptsrf(klon) surface temperature at time-step t (K) |
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! ptsoil(klon,nsoilmx) temperature inside the ground (K) |
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! pcapcal(klon) surfacic specific heat (W*m-2*s*K-1) |
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! pfluxgrd(klon) surface diffusive flux from ground (Wm-2) |
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! ======================================================================= |
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! declarations: |
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! ------------- |
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! ----------------------------------------------------------------------- |
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! arguments |
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! --------- |
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REAL ptimestep |
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INTEGER indice, knon |
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REAL ptsrf(klon), ptsoil(klon, nsoilmx), snow(klon) |
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REAL pcapcal(klon), pfluxgrd(klon) |
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! ----------------------------------------------------------------------- |
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! local arrays |
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! ------------ |
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INTEGER ig, jk |
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! $$$ REAL zdz2(nsoilmx),z1(klon) |
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REAL zdz2(nsoilmx), z1(klon, nbsrf) |
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REAL min_period, dalph_soil |
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REAL ztherm_i(klon) |
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! local saved variables: |
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! ---------------------- |
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REAL dz1(nsoilmx), dz2(nsoilmx) |
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! $$$ REAL zc(klon,nsoilmx),zd(klon,nsoilmx) |
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REAL zc(klon, nsoilmx, nbsrf), zd(klon, nsoilmx, nbsrf) |
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REAL lambda |
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SAVE dz1, dz2, zc, zd, lambda |
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LOGICAL firstcall, firstsurf(nbsrf) |
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SAVE firstcall, firstsurf |
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REAL isol, isno, iice |
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SAVE isol, isno, iice |
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DATA firstcall/.TRUE./ |
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DATA firstsurf/.TRUE., .TRUE., .TRUE., .TRUE./ |
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DATA isol, isno, iice/2000., 2000., 2000./ |
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! ----------------------------------------------------------------------- |
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! Depthts: |
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! -------- |
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REAL fz, rk, fz1, rk1, rk2 |
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fz(rk) = fz1*(dalph_soil**rk-1.)/(dalph_soil-1.) |
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pfluxgrd(:) = 0. |
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! calcul de l'inertie thermique a partir de la variable rnat. |
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! on initialise a iice meme au-dessus d'un point de mer au cas |
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! ou le point de mer devienne point de glace au pas suivant |
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! on corrige si on a un point de terre avec ou sans glace |
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IF (indice==is_sic) THEN |
! Author: Frederic Hourdin 30/01/92 |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (indice==is_lic) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (indice==is_ter) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = isol |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (indice==is_oce) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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END DO |
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ELSE |
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PRINT *, 'valeur d indice non prevue', indice |
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STOP 1 |
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END IF |
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! Object: computation of the soil temperature evolution, the |
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! surfacic heat capacity "Soilcap" and the surface conduction flux |
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! Method: implicit time integration |
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! Consecutive ground temperatures are related by: |
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! T(k+1) = C(k) + D(k)*T(k) (1) |
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! the coefficients C and D are computed at the t-dt time-step. |
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! Routine structure: |
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! 1) new temperatures are computed using (1) |
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! 2) C and D coefficients are computed from the new temperature |
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! profile for the t+dt time-step |
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! 3) the coefficients A and B are computed where the diffusive |
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! fluxes at the t+dt time-step is given by |
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! Fdiff = A + B Ts(t+dt) |
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! or Fdiff = F0 + Soilcap (Ts(t+dt)-Ts(t))/dt |
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! with F0 = A + B (Ts(t)) |
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! Soilcap = B*dt |
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USE dimens_m, only: |
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USE indicesol |
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USE dimphy |
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USE dimsoil |
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USE suphec_m |
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! Interface: |
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! ---------- |
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! Arguments: |
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! ---------- |
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! dtime physical timestep (s) |
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! indice sub-surface index |
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! snow(klon, nbsrf) snow |
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! tsurf(knon) surface temperature at time-step t (K) |
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! tsoil(klon, nsoilmx) temperature inside the ground (K) |
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! soilcap(klon) surfacic specific heat (W*m-2*s*K-1) |
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! soilflux(klon) surface diffusive flux from ground (Wm-2) |
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! $$$ IF (firstcall) THEN |
! declarations: |
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IF (firstsurf(indice)) THEN |
! ------------- |
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! ----------------------------------------------------------------------- |
! ----------------------------------------------------------------------- |
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! ground levels |
! arguments |
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! grnd=z/l where l is the skin depth of the diurnal cycle: |
! --------- |
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! -------------------------------------------------------- |
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min_period = 1800. ! en secondes |
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dalph_soil = 2. ! rapport entre les epaisseurs de 2 couches succ. |
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OPEN (99, FILE='soil.def', STATUS='old', FORM='formatted', ERR=9999) |
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READ (99, *) min_period |
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READ (99, *) dalph_soil |
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PRINT *, 'Discretization for the soil model' |
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PRINT *, 'First level e-folding depth', min_period, ' dalph', & |
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dalph_soil |
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CLOSE (99) |
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9999 CONTINUE |
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! la premiere couche represente un dixieme de cycle diurne |
REAL dtime |
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fz1 = sqrt(min_period/3.14) |
INTEGER nisurf, knon |
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REAL tsurf(knon), tsoil(klon, nsoilmx), snow(klon) |
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REAL soilcap(klon), soilflux(klon) |
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DO jk = 1, nsoilmx |
! ----------------------------------------------------------------------- |
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rk1 = jk |
! local arrays |
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rk2 = jk - 1 |
! ------------ |
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dz2(jk) = fz(rk1) - fz(rk2) |
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END DO |
INTEGER ig, jk |
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DO jk = 1, nsoilmx - 1 |
! $$$ REAL zdz2(nsoilmx), z1(klon) |
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rk1 = jk + .5 |
REAL zdz2(nsoilmx), z1(klon, nbsrf) |
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rk2 = jk - .5 |
REAL min_period, dalph_soil |
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dz1(jk) = 1./(fz(rk1)-fz(rk2)) |
REAL ztherm_i(klon) |
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END DO |
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lambda = fz(.5)*dz1(1) |
! local saved variables: |
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PRINT *, 'full layers, intermediate layers (seconds)' |
! ---------------------- |
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DO jk = 1, nsoilmx |
REAL dz1(nsoilmx), dz2(nsoilmx) |
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rk = jk |
! $$$ REAL zc(klon, nsoilmx), zd(klon, nsoilmx) |
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rk1 = jk + .5 |
REAL zc(klon, nsoilmx, nbsrf), zd(klon, nsoilmx, nbsrf) |
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rk2 = jk - .5 |
REAL lambda |
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PRINT *, 'fz=', fz(rk1)*fz(rk2)*3.14, fz(rk)*fz(rk)*3.14 |
SAVE dz1, dz2, zc, zd, lambda |
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END DO |
LOGICAL firstsurf(nbsrf) |
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! PB |
SAVE firstsurf |
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firstsurf(indice) = .FALSE. |
REAL isol, isno, iice |
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! $$$ firstcall =.false. |
SAVE isol, isno, iice |
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DATA firstsurf/.TRUE., .TRUE., .TRUE., .TRUE./ |
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DATA isol, isno, iice/2000., 2000., 2000./ |
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! ----------------------------------------------------------------------- |
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! Depthts: |
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! -------- |
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REAL rk, fz1, rk1, rk2 |
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! Initialisations: |
soilflux(:) = 0. |
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! ---------------- |
! calcul de l'inertie thermique a partir de la variable rnat. |
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! on initialise a iice meme au-dessus d'un point de mer au cas |
98 |
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! ou le point de mer devienne point de glace au pas suivant |
99 |
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! on corrige si on a un point de terre avec ou sans glace |
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IF (nisurf==is_sic) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (nisurf==is_lic) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (nisurf==is_ter) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = isol |
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IF (snow(ig)>0.0) ztherm_i(ig) = isno |
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END DO |
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ELSE IF (nisurf==is_oce) THEN |
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DO ig = 1, knon |
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ztherm_i(ig) = iice |
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END DO |
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ELSE |
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PRINT *, 'valeur d indice non prevue', nisurf |
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STOP 1 |
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END IF |
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IF (firstsurf(nisurf)) THEN |
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! ----------------------------------------------------------------------- |
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! ground levels |
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! grnd=z/l where l is the skin depth of the diurnal cycle: |
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! -------------------------------------------------------- |
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min_period = 1800. ! en secondes |
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dalph_soil = 2. ! rapport entre les epaisseurs de 2 couches succ. |
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OPEN (99, FILE='soil.def', STATUS='old', FORM='formatted', ERR=9999) |
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READ (99, *) min_period |
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READ (99, *) dalph_soil |
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PRINT *, 'Discretization for the soil model' |
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PRINT *, 'First level e-folding depth', min_period, ' dalph', & |
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dalph_soil |
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CLOSE (99) |
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9999 CONTINUE |
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! la premiere couche represente un dixieme de cycle diurne |
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fz1 = sqrt(min_period/3.14) |
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DO jk = 1, nsoilmx |
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rk1 = jk |
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rk2 = jk - 1 |
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dz2(jk) = fz(rk1) - fz(rk2) |
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END DO |
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DO jk = 1, nsoilmx - 1 |
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rk1 = jk + .5 |
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rk2 = jk - .5 |
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dz1(jk) = 1./(fz(rk1)-fz(rk2)) |
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END DO |
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lambda = fz(.5)*dz1(1) |
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PRINT *, 'full layers, intermediate layers (seconds)' |
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DO jk = 1, nsoilmx |
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rk = jk |
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rk1 = jk + .5 |
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rk2 = jk - .5 |
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PRINT *, 'fz=', fz(rk1)*fz(rk2)*3.14, fz(rk)*fz(rk)*3.14 |
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END DO |
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! PB |
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firstsurf(nisurf) = .FALSE. |
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! Initialisations: |
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! ---------------- |
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ELSE |
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! ----------------------------------------------------------------------- |
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! Computation of the soil temperatures using the Cgrd and Dgrd |
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! coefficient computed at the previous time-step: |
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! ----------------------------------------------- |
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! surface temperature |
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DO ig = 1, knon |
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tsoil(ig, 1) = (lambda*zc(ig, 1, nisurf)+tsurf(ig))/(lambda*(1.-zd(ig, 1, & |
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nisurf))+1.) |
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END DO |
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! other temperatures |
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DO jk = 1, nsoilmx - 1 |
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DO ig = 1, knon |
186 |
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tsoil(ig, jk+1) = zc(ig, jk, nisurf) + zd(ig, jk, nisurf)*tsoil(ig, & |
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jk) |
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END DO |
189 |
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END DO |
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ELSE !--not firstcall |
END IF |
192 |
! ----------------------------------------------------------------------- |
! ----------------------------------------------------------------------- |
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! Computation of the soil temperatures using the Cgrd and Dgrd |
! Computation of the Cgrd and Dgrd coefficient for the next step: |
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! coefficient computed at the previous time-step: |
! --------------------------------------------------------------- |
195 |
! ----------------------------------------------- |
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! $$$ PB ajout pour cas glace de mer |
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IF (nisurf==is_sic) THEN |
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DO ig = 1, knon |
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tsoil(ig, nsoilmx) = rtt - 1.8 |
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END DO |
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END IF |
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DO jk = 1, nsoilmx |
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zdz2(jk) = dz2(jk)/dtime |
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END DO |
206 |
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! surface temperature |
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DO ig = 1, knon |
DO ig = 1, knon |
208 |
ptsoil(ig, 1) = (lambda*zc(ig,1,indice)+ptsrf(ig))/(lambda*(1.-zd(ig,1, & |
z1(ig, nisurf) = zdz2(nsoilmx) + dz1(nsoilmx-1) |
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indice))+1.) |
zc(ig, nsoilmx-1, nisurf) = zdz2(nsoilmx)*tsoil(ig, nsoilmx)/ & |
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z1(ig, nisurf) |
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zd(ig, nsoilmx-1, nisurf) = dz1(nsoilmx-1)/z1(ig, nisurf) |
212 |
END DO |
END DO |
213 |
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214 |
! other temperatures |
DO jk = nsoilmx - 1, 2, -1 |
215 |
DO jk = 1, nsoilmx - 1 |
DO ig = 1, knon |
216 |
DO ig = 1, knon |
z1(ig, nisurf) = 1./(zdz2(jk)+dz1(jk-1)+dz1(jk)*(1.-zd(ig, jk, nisurf))) |
217 |
ptsoil(ig, jk+1) = zc(ig, jk, indice) + zd(ig, jk, indice)*ptsoil(ig, & |
zc(ig, jk-1, nisurf) = (tsoil(ig, jk)*zdz2(jk)+dz1(jk)*zc(ig, jk, nisurf) & |
218 |
jk) |
)*z1(ig, nisurf) |
219 |
END DO |
zd(ig, jk-1, nisurf) = dz1(jk-1)*z1(ig, nisurf) |
220 |
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END DO |
221 |
END DO |
END DO |
222 |
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223 |
END IF !--not firstcall |
! ----------------------------------------------------------------------- |
224 |
! ----------------------------------------------------------------------- |
! computation of the surface diffusive flux from ground and |
225 |
! Computation of the Cgrd and Dgrd coefficient for the next step: |
! calorific capacity of the ground: |
226 |
! --------------------------------------------------------------- |
! --------------------------------- |
227 |
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! $$$ PB ajout pour cas glace de mer |
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IF (indice==is_sic) THEN |
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228 |
DO ig = 1, knon |
DO ig = 1, knon |
229 |
ptsoil(ig, nsoilmx) = rtt - 1.8 |
soilflux(ig) = ztherm_i(ig)*dz1(1)*(zc(ig, 1, nisurf)+(zd(ig, 1, & |
230 |
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nisurf)-1.)*tsoil(ig, 1)) |
231 |
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soilcap(ig) = ztherm_i(ig)*(dz2(1)+dtime*(1.-zd(ig, 1, nisurf))*dz1(1)) |
232 |
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z1(ig, nisurf) = lambda*(1.-zd(ig, 1, nisurf)) + 1. |
233 |
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soilcap(ig) = soilcap(ig)/z1(ig, nisurf) |
234 |
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soilflux(ig) = soilflux(ig) + soilcap(ig)*(tsoil(ig, 1)*z1(ig, nisurf)- & |
235 |
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lambda*zc(ig, 1, nisurf)-tsurf(ig))/dtime |
236 |
END DO |
END DO |
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END IF |
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237 |
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238 |
DO jk = 1, nsoilmx |
contains |
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zdz2(jk) = dz2(jk)/ptimestep |
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END DO |
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DO ig = 1, knon |
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z1(ig, indice) = zdz2(nsoilmx) + dz1(nsoilmx-1) |
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zc(ig, nsoilmx-1, indice) = zdz2(nsoilmx)*ptsoil(ig, nsoilmx)/ & |
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z1(ig, indice) |
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zd(ig, nsoilmx-1, indice) = dz1(nsoilmx-1)/z1(ig, indice) |
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END DO |
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239 |
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240 |
DO jk = nsoilmx - 1, 2, -1 |
real function fz(rk) |
241 |
DO ig = 1, knon |
real rk |
242 |
z1(ig, indice) = 1./(zdz2(jk)+dz1(jk-1)+dz1(jk)*(1.-zd(ig,jk,indice))) |
fz = fz1*(dalph_soil**rk-1.)/(dalph_soil-1.) |
243 |
zc(ig, jk-1, indice) = (ptsoil(ig,jk)*zdz2(jk)+dz1(jk)*zc(ig,jk,indice) & |
end function fz |
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)*z1(ig, indice) |
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zd(ig, jk-1, indice) = dz1(jk-1)*z1(ig, indice) |
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END DO |
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END DO |
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244 |
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245 |
! ----------------------------------------------------------------------- |
END SUBROUTINE soil |
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! computation of the surface diffusive flux from ground and |
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! calorific capacity of the ground: |
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! --------------------------------- |
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DO ig = 1, knon |
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pfluxgrd(ig) = ztherm_i(ig)*dz1(1)*(zc(ig,1,indice)+(zd(ig,1, & |
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indice)-1.)*ptsoil(ig,1)) |
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pcapcal(ig) = ztherm_i(ig)*(dz2(1)+ptimestep*(1.-zd(ig,1,indice))*dz1(1)) |
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z1(ig, indice) = lambda*(1.-zd(ig,1,indice)) + 1. |
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pcapcal(ig) = pcapcal(ig)/z1(ig, indice) |
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pfluxgrd(ig) = pfluxgrd(ig) + pcapcal(ig)*(ptsoil(ig,1)*z1(ig,indice)- & |
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lambda*zc(ig,1,indice)-ptsrf(ig))/ptimestep |
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END DO |
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246 |
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247 |
RETURN |
end module soil_m |
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END SUBROUTINE soil |
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