--- trunk/phylmd/soil.f 2014/07/07 17:45:21 101 +++ trunk/phylmd/Interface_surf/soil.f 2018/02/05 10:39:38 254 @@ -4,157 +4,119 @@ contains - SUBROUTINE soil(ptimestep, indice, knon, snow, ptsrf, ptsoil, pcapcal, & - pfluxgrd) + SUBROUTINE soil(dtime, nisurf, snow, tsurf, tsoil, soilcap, soilflux) - ! From LMDZ4/libf/phylmd/soil.F, version 1.1.1.1 2004/05/19 + ! From LMDZ4/libf/phylmd/soil.F, version 1.1.1.1, 2004/05/19 - USE dimens_m - USE indicesol - USE dimphy - USE dimsoil - USE suphec_m - - ! ======================================================================= - - ! Auteur: Frederic Hourdin 30/01/92 - ! ------- - - ! objet: computation of : the soil temperature evolution - ! ------ the surfacic heat capacity "Capcal" - ! the surface conduction flux pcapcal + ! Author: Frederic Hourdin, January 30th, 1992 + ! Object: computation of the soil temperature evolution, the heat + ! capacity per unit surface and the surface conduction flux ! Method: implicit time integration - ! ------- + ! Consecutive ground temperatures are related by: - ! T(k+1) = C(k) + D(k)*T(k) (1) - ! the coefficients C and D are computed at the t-dt time-step. - ! Routine structure: - ! 1)new temperatures are computed using (1) - ! 2)C and D coefficients are computed from the new temperature - ! profile for the t+dt time-step - ! 3)the coefficients A and B are computed where the diffusive - ! fluxes at the t+dt time-step is given by - ! Fdiff = A + B Ts(t+dt) - ! or Fdiff = F0 + Capcal (Ts(t+dt)-Ts(t))/dt - ! with F0 = A + B (Ts(t)) - ! Capcal = B*dt - - ! Interface: - ! ---------- - - ! Arguments: - ! ---------- - ! ptimestep physical timestep (s) - ! indice sub-surface index - ! snow(klon,nbsrf) snow - ! ptsrf(klon) surface temperature at time-step t (K) - ! ptsoil(klon,nsoilmx) temperature inside the ground (K) - ! pcapcal(klon) surfacic specific heat (W*m-2*s*K-1) - ! pfluxgrd(klon) surface diffusive flux from ground (Wm-2) - - ! ======================================================================= - ! declarations: - ! ------------- - - - ! ----------------------------------------------------------------------- - ! arguments - ! --------- - - REAL ptimestep - INTEGER indice, knon - REAL ptsrf(klon), ptsoil(klon, nsoilmx), snow(klon) - REAL pcapcal(klon), pfluxgrd(klon) - - ! ----------------------------------------------------------------------- - ! local arrays - ! ------------ - - INTEGER ig, jk - ! $$$ REAL zdz2(nsoilmx),z1(klon) - REAL zdz2(nsoilmx), z1(klon, nbsrf) + ! T(k + 1) = C(k) + D(k) * T(k) (1) + ! The coefficients C and D are computed at the t - dt time-step. + ! Structure of the procedure: + ! 1) new temperatures are computed using (1) + ! 2) C and D coefficients are computed from the new temperature + ! profile for the t + dt time-step + ! 3) the coefficients A and B are computed where the diffusive + ! fluxes at the t + dt time-step is given by + ! Fdiff = A + B Ts(t + dt) + ! or + ! Fdiff = F0 + Soilcap (Ts(t + dt) - Ts(t)) / dt + ! with + ! F0 = A + B (Ts(t)) + ! Soilcap = B * dt + + USE indicesol, only: nbsrf, is_lic, is_oce, is_sic, is_ter + USE dimphy, only: klon + USE dimsoil, only: nsoilmx + USE suphec_m, only: rtt + + REAL, intent(in):: dtime ! physical timestep (s) + INTEGER, intent(in):: nisurf ! sub-surface index + REAL, intent(in):: snow(:) ! (knon) + REAL, intent(in):: tsurf(:) ! (knon) surface temperature at time-step t (K) + + real, intent(inout):: tsoil(:, :) ! (knon, nsoilmx) + ! temperature inside the ground (K) + + REAL, intent(out):: soilcap(:) ! (knon) + ! specific heat per unit surface (W m-2 s K-1) + + REAL, intent(out):: soilflux(:) ! (knon) + ! surface diffusive flux from ground (W m-2) + + ! Local: + + INTEGER knon, ig, jk + REAL zdz2(nsoilmx) + real z1(size(tsurf), nbsrf) ! (knon, nbsrf) REAL min_period, dalph_soil - REAL ztherm_i(klon) - - ! local saved variables: - ! ---------------------- - REAL dz1(nsoilmx), dz2(nsoilmx) - ! $$$ REAL zc(klon,nsoilmx),zd(klon,nsoilmx) - REAL zc(klon, nsoilmx, nbsrf), zd(klon, nsoilmx, nbsrf) - REAL lambda - SAVE dz1, dz2, zc, zd, lambda - LOGICAL firstcall, firstsurf(nbsrf) - SAVE firstcall, firstsurf - REAL isol, isno, iice - SAVE isol, isno, iice - - DATA firstcall/.TRUE./ - DATA firstsurf/.TRUE., .TRUE., .TRUE., .TRUE./ - - DATA isol, isno, iice/2000., 2000., 2000./ - - ! ----------------------------------------------------------------------- - ! Depthts: - ! -------- - - REAL fz, rk, fz1, rk1, rk2 - - fz(rk) = fz1*(dalph_soil**rk-1.)/(dalph_soil-1.) - pfluxgrd(:) = 0. - ! calcul de l'inertie thermique a partir de la variable rnat. - ! on initialise a iice meme au-dessus d'un point de mer au cas - ! ou le point de mer devienne point de glace au pas suivant - ! on corrige si on a un point de terre avec ou sans glace + REAL ztherm_i(size(tsurf)) ! (knon) + REAL, save:: dz1(nsoilmx), dz2(nsoilmx) + REAL, save:: zc(klon, nsoilmx, nbsrf), zd(klon, nsoilmx, nbsrf) + REAL, save:: lambda + LOGICAL:: firstsurf(nbsrf) = .TRUE. + REAL:: isol = 2000., isno = 2000., iice = 2000. + + ! Depths: + REAL rk, fz1, rk1, rk2 + + !----------------------------------------------------------------------- + + knon = size(tsurf) + + ! Calcul de l'inertie thermique. On initialise \`a iice m\^eme + ! au-dessus d'un point de mer au cas o\`u le point de mer devienne + ! point de glace au pas suivant. On corrige si on a un point de + ! terre avec ou sans glace. - IF (indice==is_sic) THEN + IF (nisurf==is_sic) THEN DO ig = 1, knon ztherm_i(ig) = iice - IF (snow(ig)>0.0) ztherm_i(ig) = isno + IF (snow(ig) > 0.0) ztherm_i(ig) = isno END DO - ELSE IF (indice==is_lic) THEN + ELSE IF (nisurf==is_lic) THEN DO ig = 1, knon ztherm_i(ig) = iice - IF (snow(ig)>0.0) ztherm_i(ig) = isno + IF (snow(ig) > 0.0) ztherm_i(ig) = isno END DO - ELSE IF (indice==is_ter) THEN + ELSE IF (nisurf==is_ter) THEN DO ig = 1, knon ztherm_i(ig) = isol - IF (snow(ig)>0.0) ztherm_i(ig) = isno + IF (snow(ig) > 0.0) ztherm_i(ig) = isno END DO - ELSE IF (indice==is_oce) THEN + ELSE IF (nisurf==is_oce) THEN DO ig = 1, knon ztherm_i(ig) = iice END DO ELSE - PRINT *, 'valeur d indice non prevue', indice + PRINT *, 'valeur d indice non prevue', nisurf STOP 1 END IF - - ! $$$ IF (firstcall) THEN - IF (firstsurf(indice)) THEN - - ! ----------------------------------------------------------------------- + IF (firstsurf(nisurf)) THEN ! ground levels - ! grnd=z/l where l is the skin depth of the diurnal cycle: - ! -------------------------------------------------------- + ! grnd=z / l where l is the skin depth of the diurnal cycle: min_period = 1800. ! en secondes dalph_soil = 2. ! rapport entre les epaisseurs de 2 couches succ. - OPEN (99, FILE='soil.def', STATUS='old', FORM='formatted', ERR=9999) - READ (99, *) min_period - READ (99, *) dalph_soil + OPEN(99, FILE='soil.def', STATUS='old', FORM='formatted', ERR=9999) + READ(99, *) min_period + READ(99, *) dalph_soil PRINT *, 'Discretization for the soil model' - PRINT *, 'First level e-folding depth', min_period, ' dalph', & + PRINT *, 'First level e-folding depth', min_period, ' dalph', & dalph_soil - CLOSE (99) + CLOSE(99) 9999 CONTINUE ! la premiere couche represente un dixieme de cycle diurne - fz1 = sqrt(min_period/3.14) + fz1 = sqrt(min_period / 3.14) DO jk = 1, nsoilmx rk1 = jk @@ -164,90 +126,92 @@ DO jk = 1, nsoilmx - 1 rk1 = jk + .5 rk2 = jk - .5 - dz1(jk) = 1./(fz(rk1)-fz(rk2)) + dz1(jk) = 1. / (fz(rk1) - fz(rk2)) END DO - lambda = fz(.5)*dz1(1) + lambda = fz(.5) * dz1(1) PRINT *, 'full layers, intermediate layers (seconds)' DO jk = 1, nsoilmx rk = jk rk1 = jk + .5 rk2 = jk - .5 - PRINT *, 'fz=', fz(rk1)*fz(rk2)*3.14, fz(rk)*fz(rk)*3.14 + PRINT *, 'fz=', fz(rk1) * fz(rk2) * 3.14, fz(rk) * fz(rk) * 3.14 END DO ! PB - firstsurf(indice) = .FALSE. - ! $$$ firstcall =.false. - - ! Initialisations: - ! ---------------- - - ELSE !--not firstcall - ! ----------------------------------------------------------------------- - ! Computation of the soil temperatures using the Cgrd and Dgrd + firstsurf(nisurf) = .FALSE. + ELSE + ! Computation of the soil temperatures using the Zc and Zd ! coefficient computed at the previous time-step: - ! ----------------------------------------------- ! surface temperature DO ig = 1, knon - ptsoil(ig, 1) = (lambda*zc(ig,1,indice)+ptsrf(ig))/(lambda*(1.-zd(ig,1, & - indice))+1.) + tsoil(ig, 1) = (lambda * zc(ig, 1, nisurf) + tsurf(ig)) & + / (lambda * (1. - zd(ig, 1, nisurf)) + 1.) END DO ! other temperatures DO jk = 1, nsoilmx - 1 DO ig = 1, knon - ptsoil(ig, jk+1) = zc(ig, jk, indice) + zd(ig, jk, indice)*ptsoil(ig, & - jk) + tsoil(ig, jk + 1) = zc(ig, jk, nisurf) & + + zd(ig, jk, nisurf) * tsoil(ig, jk) END DO END DO + END IF - END IF !--not firstcall - ! ----------------------------------------------------------------------- - ! Computation of the Cgrd and Dgrd coefficient for the next step: - ! --------------------------------------------------------------- + ! Computation of the Zc and Zd coefficient for the next step: - ! $$$ PB ajout pour cas glace de mer - IF (indice==is_sic) THEN + IF (nisurf==is_sic) THEN DO ig = 1, knon - ptsoil(ig, nsoilmx) = rtt - 1.8 + tsoil(ig, nsoilmx) = rtt - 1.8 END DO END IF DO jk = 1, nsoilmx - zdz2(jk) = dz2(jk)/ptimestep + zdz2(jk) = dz2(jk) / dtime END DO DO ig = 1, knon - z1(ig, indice) = zdz2(nsoilmx) + dz1(nsoilmx-1) - zc(ig, nsoilmx-1, indice) = zdz2(nsoilmx)*ptsoil(ig, nsoilmx)/ & - z1(ig, indice) - zd(ig, nsoilmx-1, indice) = dz1(nsoilmx-1)/z1(ig, indice) + z1(ig, nisurf) = zdz2(nsoilmx) + dz1(nsoilmx - 1) + zc(ig, nsoilmx - 1, nisurf) = zdz2(nsoilmx) * tsoil(ig, nsoilmx) / & + z1(ig, nisurf) + zd(ig, nsoilmx - 1, nisurf) = dz1(nsoilmx - 1) / z1(ig, nisurf) END DO - DO jk = nsoilmx - 1, 2, -1 + DO jk = nsoilmx - 1, 2, - 1 DO ig = 1, knon - z1(ig, indice) = 1./(zdz2(jk)+dz1(jk-1)+dz1(jk)*(1.-zd(ig,jk,indice))) - zc(ig, jk-1, indice) = (ptsoil(ig,jk)*zdz2(jk)+dz1(jk)*zc(ig,jk,indice) & - )*z1(ig, indice) - zd(ig, jk-1, indice) = dz1(jk-1)*z1(ig, indice) + z1(ig, nisurf) = 1. / (zdz2(jk) + dz1(jk - 1) & + + dz1(jk) * (1. - zd(ig, jk, nisurf))) + zc(ig, jk - 1, nisurf) = (tsoil(ig, jk) * zdz2(jk) & + + dz1(jk) * zc(ig, jk, nisurf)) * z1(ig, nisurf) + zd(ig, jk - 1, nisurf) = dz1(jk - 1) * z1(ig, nisurf) END DO END DO - ! ----------------------------------------------------------------------- ! computation of the surface diffusive flux from ground and ! calorific capacity of the ground: - ! --------------------------------- DO ig = 1, knon - pfluxgrd(ig) = ztherm_i(ig)*dz1(1)*(zc(ig,1,indice)+(zd(ig,1, & - indice)-1.)*ptsoil(ig,1)) - pcapcal(ig) = ztherm_i(ig)*(dz2(1)+ptimestep*(1.-zd(ig,1,indice))*dz1(1)) - z1(ig, indice) = lambda*(1.-zd(ig,1,indice)) + 1. - pcapcal(ig) = pcapcal(ig)/z1(ig, indice) - pfluxgrd(ig) = pfluxgrd(ig) + pcapcal(ig)*(ptsoil(ig,1)*z1(ig,indice)- & - lambda*zc(ig,1,indice)-ptsrf(ig))/ptimestep + soilflux(ig) = ztherm_i(ig) * dz1(1) * (zc(ig, 1, nisurf) + (zd(ig, 1, & + nisurf) - 1.) * tsoil(ig, 1)) + soilcap(ig) = ztherm_i(ig) * (dz2(1) & + + dtime * (1. - zd(ig, 1, nisurf)) * dz1(1)) + z1(ig, nisurf) = lambda * (1. - zd(ig, 1, nisurf)) + 1. + soilcap(ig) = soilcap(ig) / z1(ig, nisurf) + soilflux(ig) = soilflux(ig) + soilcap(ig) * (tsoil(ig, 1) & + * z1(ig, nisurf) - lambda * zc(ig, 1, nisurf) - tsurf(ig)) / dtime END DO + contains + + pure real function fz(rk) + + real, intent(in):: rk + + !----------------------------------------- + + fz = fz1 * (dalph_soil**rk - 1.) / (dalph_soil - 1.) + + end function fz + END SUBROUTINE soil end module soil_m