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guez |
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PROGRAM gcm |
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! General circulation model of LMD |
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! From "gcm.F", version 1.4, 2006/04/04 15:05:16 |
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! Avec coordonnées verticales hybrides, avec nouveaux opérateurs de |
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! dissipation * (gradiv2, divgrad2, nxgraro2) |
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! Authors: P. Le Van, L. Fairhead, F. Hourdin |
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! Possibilité de choisir le schéma pour l'advection de "q", en |
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! modifiant "iadv" dans "traceur.def". |
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! Pour Van-Leer plus vapeur d'eau saturée : iadv(1)=4 |
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! Pour Van-Leer : iadv=10 |
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USE IOIPSL, only: ioconf_calendar |
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use dimens_m, only: iim, jjm, llm, nqmx |
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use dimphy, only: klon |
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use paramet_m, only: ip1jm, ip1jmp1 |
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use comconst, only: daysec, cpp, dtvr, dtphys, g, rad, r, initialize |
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use comdissnew, only: lstardis, nitergdiv, nitergrot, niterh, tetagdiv, & |
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tetagrot, tetatemp |
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use conf_gcm_m, only: day_step, iperiod, anneeref, dayref, iecri, iphysiq, & |
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nday, raz_date, periodav, conf_gcm |
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use logic, only: iflag_phys |
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use comgeom, only: rlatu, aire_2d, cu_2d, cv_2d, rlonv |
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use temps, only: day_ref, annee_ref, day_ini, day_end, itau_phy, itau_dyn |
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use com_io_dyn, only: histid, histvid, histaveid |
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use tracstoke, only: istdyn, istphy |
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use abort_gcm_m, only: abort_gcm |
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use inithist_m, only: inithist |
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use initdynav_m, only: initdynav |
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use dynetat0_m, only: dynetat0 |
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use grid_change, only: dyn_phy, init_dyn_phy |
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use advtrac_m, only: iniadvtrac |
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use leapfrog_m, only: leapfrog |
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IMPLICIT NONE |
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REAL clesphy0(20) |
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REAL zdtvr ! time step for dynamics, in s |
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! Variables dynamiques : |
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REAL vcov(ip1jm, llm), ucov(ip1jmp1, llm) ! vents covariants |
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REAL teta(ip1jmp1, llm) ! température potentielle |
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REAL q(ip1jmp1, llm, nqmx) ! champs advectés |
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REAL ps(ip1jmp1) ! pression au sol (Pa) |
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REAL masse(ip1jmp1, llm) ! masse d'air |
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REAL phis(ip1jmp1) ! géopotentiel au sol |
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! Variables pour le fichier histoire : |
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REAL time_0 |
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!!INTEGER i |
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! Calendrier : |
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LOGICAL:: true_calendar = .false. ! default value |
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! Variables pour l'initialisation de la physique : |
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integer nq |
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REAL zcufi(klon), zcvfi(klon) ! "cu" and "cv" values on the scalar grid |
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REAL latfi(klon), lonfi(klon) |
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REAL airefi(klon) |
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logical mask_v(iim + 1, jjm) |
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! (mask for points in the "v" grid, first index is for longitude, |
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! second index is for latitude) |
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namelist /main_nml/true_calendar |
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!------------------------------------------------------------ |
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print *, "Enter namelist 'main_nml'." |
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read (unit=*, nml=main_nml) |
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write(unit=*, nml=main_nml) |
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! Initialisations: |
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call initialize |
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! Choix du calendrier : |
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if (true_calendar) then |
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call ioconf_calendar('gregorian') |
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else |
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call ioconf_calendar('360d') |
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endif |
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! Lecture des fichiers "gcm.def" ou "run.def" : |
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CALL conf_gcm(clesphy0) |
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! Initialisation des traceurs |
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! Choix du schéma pour l'advection dans le fichier "traceur.def" ou via INCA |
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call iniadvtrac(nq) |
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! Lecture du fichier "start.nc" : |
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CALL dynetat0(vcov, ucov, teta, q, masse, ps, phis, time_0) |
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! Begin special experiment |
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!!$ print *, "This is a special experiment." |
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!!$ print *, "We are setting:" |
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!!$ print *, "ucov = vcov = 0, q = 0, ps = 101325" |
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!!$ print *, "We are averaging 'teta' horizontally." |
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!!$ ucov = 0. |
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!!$ vcov = 0. |
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!!$ q = 0. |
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!!$ ps = 101325. |
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! Average teta over all longitudes and latitudes: |
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!!$ forall(i = 1:llm) teta(:,i) = sum(teta(:,i)) / ip1jmp1 |
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! (it would be better to weight each element with an associated |
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! surface area) |
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! End special experiment |
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! Lecture des paramètres de contrôle pour la simulation : |
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! on recalcule éventuellement le pas de temps |
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IF (MOD(day_step, iperiod) /= 0) THEN |
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call abort_gcm(modname = "gcm", message = & |
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'Il faut choisir un nombre de pas par jour multiple de "iperiod".', & |
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ierr = 1) |
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ENDIF |
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IF (MOD(day_step,iphysiq)/=0) THEN |
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call abort_gcm(modname = "gcm", message = & |
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'Il faut choisir un nombre de pas par jour multiple de "iphysiq".', & |
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ierr = 1) |
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ENDIF |
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! On remet le calendrier à zero si demandé: |
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if (annee_ref /= anneeref .or. day_ref /= dayref) then |
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print *, 'Attention : les dates initiales lues dans le fichier ' // & |
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'"start" ne correspondent pas à celles lues dans "gcm.def".' |
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if (raz_date /= 1) then |
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print *, 'On garde les dates du fichier "start".' |
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else |
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print *, 'On réinitialise à la date lue dans "gcm.def".' |
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annee_ref = anneeref |
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day_ref = dayref |
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day_ini = dayref |
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itau_dyn = 0 |
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itau_phy = 0 |
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time_0 = 0. |
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endif |
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ELSE |
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raz_date = 0 |
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endif |
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! Initialisation des constantes dynamiques : |
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zdtvr = daysec / REAL(day_step) |
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IF (dtvr /= zdtvr) THEN |
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print *, 'Warning: the time steps in the ".def" file and in ' // & |
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'"start.nc" are different' |
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print *, 'dtvr (from "start.nc") = ', dtvr |
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print *, 'zdtvr (from ".def") = ', zdtvr |
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print *, 'Using the value from the ".def" file.' |
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dtvr = zdtvr |
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ENDIF |
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CALL iniconst |
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! Initialisation de la géometrie : |
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CALL inigeom |
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! Initialisation du filtre : |
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CALL inifilr |
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! Initialisation de la dissipation : |
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CALL inidissip(lstardis, nitergdiv, nitergrot, niterh, tetagdiv, tetagrot, & |
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tetatemp) |
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call init_dyn_phy |
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! Initialisation de la physique : |
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IF (iflag_phys == 1) THEN |
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latfi(1)=rlatu(1) |
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latfi(2:klon-1) = pack(spread(rlatu(2:jjm), 1, iim), .true.) |
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latfi(klon)= rlatu(jjm + 1) |
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lonfi(1)=0. |
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lonfi(2:klon-1) = pack(spread(rlonv(:iim), 2, jjm - 1), .true.) |
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lonfi(klon)= 0. |
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zcufi = pack(cu_2d, dyn_phy) |
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! Construct a mask for points in the "v" grid: |
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mask_v = .true. |
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mask_v(2:, 1) = .false. |
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mask_v(iim + 1, 2:) = .false. |
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zcvfi(:klon - 1) = pack(cv_2d, mask_v) |
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zcvfi(klon) = cv_2d(1, jjm) |
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! (that value of "cv_2d" is used twice in "zcvfi") |
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airefi = pack(aire_2d, dyn_phy) |
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print *, 'Attention : vitesse verticale nulle dans la physique.' |
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CALL iniphysiq(klon, llm, daysec, day_ini, dtphys, latfi, lonfi, airefi, & |
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zcufi, zcvfi, rad, g, r, cpp) |
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ENDIF |
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! Numéro de stockage pour les fichiers de redémarrage : |
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! Initialisation des entrées-sorties : |
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day_end = day_ini + nday |
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print *, "day_ini = ", day_ini |
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print *, "day_end = ", day_end |
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CALL dynredem0("restart.nc", day_end, phis, nqmx) |
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CALL inithist(day_ref, annee_ref, zdtvr, nqmx, histid, histvid, & |
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infile="dyn_hist.nc", t_ops = iecri * daysec, t_wrt = iecri * daysec) |
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CALL initdynav(day_ref, annee_ref, zdtvr, nqmx, histaveid, & |
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infile='dyn_hist_ave.nc', t_ops = iperiod * zdtvr, & |
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t_wrt = periodav * daysec) |
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! Choix des fréquences de stockage pour le hors-ligne : |
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istdyn = day_step / 4 ! stockage toutes les 6 h = 1 jour / 4 |
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istphy = istdyn / iphysiq |
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! Intégration temporelle du modèle : |
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CALL leapfrog(ucov, vcov, teta, ps, masse, phis, nq, q, clesphy0, time_0) |
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END PROGRAM gcm |
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