libf/dyn3d/gcm.f90

PROGRAM gcm

  ! Authors: P. Le Van, L. Fairhead, F. Hourdin
  ! From "gcm.F", version 1.4, 2006/04/04 15:05:16

  ! General circulation model of LMD. Avec coordonnée verticale
  ! hybride, avec nouveaux opérateurs de dissipation "*" ("gradiv2",
  ! "divgrad2", "nxgraro2"). Possibilité de choisir le schéma pour
  ! l'advection de "q", en modifiant "iadv" dans "traceur.def".

  use clesphys2, only: read_clesphys2
  use comconst, only: daysec, cpp, dtvr, g, rad, r
  use comgeom, only: rlatu, aire_2d, cu_2d, cv_2d, rlonv
  use comgeomphy, only: airephy, cuphy, cvphy, rlatd, rlond
  use conf_gcm_m, only: day_step, iperiod, anneeref, dayref, iecri, iphysiq, &
       nday, raz_date, periodav, conf_gcm
  use dimens_m, only: iim, jjm, llm, nqmx
  use dimphy, only: klon
  use dynetat0_m, only: dynetat0, day_ini
  use dynredem0_m, only: dynredem0
  use grid_change, only: dyn_phy, init_dyn_phy
  use iniadvtrac_m, only: iniadvtrac
  use inidissip_m, only: inidissip
  use inifilr_m, only: inifilr
  use inigeom_m, only: inigeom
  use initdynav_m, only: initdynav
  use inithist_m, only: inithist
  USE calendar, only: ioconf_calendar
  use histcom, only: histclo
  use leapfrog_m, only: leapfrog
  use logic, only: iflag_phys
  use suphec_m, only: suphec
  use temps, only: day_ref, annee_ref, day_end, itau_dyn
  use tracstoke, only: istdyn, istphy
  use yoethf_m, only: yoethf

  IMPLICIT NONE

  REAL zdtvr ! time step for dynamics, in s

  ! Variables dynamiques :
  REAL ucov(iim + 1, jjm + 1, llm), vcov(iim + 1, jjm, llm)  ! vent covariant
  REAL teta(iim + 1, jjm + 1, llm) ! température potentielle 
  REAL q(iim + 1, jjm + 1, llm, nqmx) ! champs advectés
  REAL ps(iim + 1, jjm + 1) ! pression au sol (Pa)
  REAL masse(iim + 1, jjm + 1, llm) ! masse d'air
  REAL phis(iim + 1, jjm + 1) ! géopotentiel au sol

  ! Variables pour le fichier histoire :
  REAL time_0 ! time in day, as a fraction of day, in [0, 1[

  ! Calendrier :
  LOGICAL:: true_calendar = .false. ! default value

  logical mask_v(iim + 1, jjm) 
  ! (mask for points in the "v" grid, first index is for longitude,
  ! second index is for latitude)

  namelist /main_nml/true_calendar

  !------------------------------------------------------------

  print *, "Enter namelist 'main_nml'."
  read (unit=*, nml=main_nml)
  write(unit=*, nml=main_nml)

  ! Choix du calendrier :
  if (true_calendar) then
     call ioconf_calendar('gregorian')
  else
     call ioconf_calendar('360d')
  endif

  ! Lecture des fichiers "gcm.def" ou "run.def" :
  call read_clesphys2
  CALL conf_gcm

  ! Initialisation des traceurs
  ! Choix du schéma pour l'advection dans le fichier "traceur.def" ou via INCA
  call iniadvtrac

  ! Lecture du fichier "start.nc" :
  CALL dynetat0(vcov, ucov, teta, q, masse, ps, phis, time_0)

  ! On remet le calendrier à zero si demandé :
  if (annee_ref /= anneeref .or. day_ref /= dayref) then
     print *, 'Attention : les dates initiales lues dans le fichier ' // &
          '"start" ne correspondent pas à celles lues dans "gcm.def".'
     if (raz_date) then
        print *, 'On réinitialise à la date lue dans "gcm.def".'
        annee_ref = anneeref
        day_ref = dayref
        day_ini = dayref
        itau_dyn = 0
        time_0 = 0.
     else
        print *, 'On garde les dates du fichier "start".'
     endif
  ELSE
     raz_date = .false.
  endif

  ! On recalcule éventuellement le pas de temps :
  zdtvr = daysec / REAL(day_step)
  IF (dtvr /= zdtvr) THEN
     print *, 'Warning: the time steps in the ".def" file and in ' // &
          '"start.nc" are different'
     print *, 'dtvr (from "start.nc") = ', dtvr
     print *, 'zdtvr (from ".def") = ', zdtvr
     print *, 'Using the value from the ".def" file.'
     dtvr = zdtvr
  ENDIF

  CALL iniconst 
  CALL inigeom ! initialisation de la géometrie
  CALL inifilr ! initialisation du filtre
  CALL inidissip
  call init_dyn_phy

  ! Initialisation de la physique :
  IF (iflag_phys == 1) THEN
     rlatd(1)=rlatu(1)
     rlatd(2:klon-1) = pack(spread(rlatu(2:jjm), 1, iim), .true.)
     rlatd(klon)= rlatu(jjm + 1)

     rlond(1)=0.
     rlond(2:klon-1) = pack(spread(rlonv(:iim), 2, jjm - 1), .true.)
     rlond(klon)= 0.

     cuphy = pack(cu_2d, dyn_phy)

     ! Construct a mask for points in the "v" grid:
     mask_v = .true.
     mask_v(2:, 1) = .false.
     mask_v(iim + 1, 2:) = .false.

     cvphy(:klon - 1) = pack(cv_2d, mask_v)
     cvphy(klon) = cv_2d(1, jjm)
     ! (that value of "cv_2d" is used twice in "cvphy")

     airephy = pack(aire_2d, dyn_phy)
     CALL suphec
     call yoethf
  ENDIF

  ! Initialisation des entrées-sorties :
  day_end = day_ini + nday
  print *, "day_ini = ", day_ini
  print *, "day_end = ", day_end

  CALL dynredem0("restart.nc", day_end, phis)
  CALL inithist(day_ref, annee_ref, zdtvr, nqmx, t_ops = iecri * daysec, &
       t_wrt = iecri * daysec)
  CALL initdynav(day_ref, annee_ref, zdtvr, nqmx, t_ops = iperiod * zdtvr, &
       t_wrt = periodav * daysec)

  ! Choix des fréquences de stockage pour le hors-ligne :
  istdyn = day_step / 4 ! stockage toutes les 6 h = 1 jour / 4
  istphy = istdyn / iphysiq     

  ! Intégration temporelle du modèle :
  CALL leapfrog(ucov, vcov, teta, ps, masse, phis, q, time_0)

  call histclo
  print *, 'Simulation finished'
  print *, 'Everything is cool'

END PROGRAM gcm
1	guez	3	PROGRAM gcm
2
3	guez	36	! Authors: P. Le Van, L. Fairhead, F. Hourdin
4			! From "gcm.F", version 1.4, 2006/04/04 15:05:16
5	guez	3
6	guez	38	! General circulation model of LMD. Avec coordonnée verticale
7			! hybride, avec nouveaux opérateurs de dissipation "*" ("gradiv2",
8			! "divgrad2", "nxgraro2"). Possibilité de choisir le schéma pour
9			! l'advection de "q", en modifiant "iadv" dans "traceur.def".
10
11	guez	26	use clesphys2, only: read_clesphys2
12	guez	39	use comconst, only: daysec, cpp, dtvr, g, rad, r
13	guez	26	use comgeom, only: rlatu, aire_2d, cu_2d, cv_2d, rlonv
14	guez	37	use comgeomphy, only: airephy, cuphy, cvphy, rlatd, rlond
15	guez	3	use conf_gcm_m, only: day_step, iperiod, anneeref, dayref, iecri, iphysiq, &
16			nday, raz_date, periodav, conf_gcm
17	guez	26	use dimens_m, only: iim, jjm, llm, nqmx
18			use dimphy, only: klon
19	guez	25	use dynetat0_m, only: dynetat0, day_ini
20	guez	26	use dynredem0_m, only: dynredem0
21	guez	3	use grid_change, only: dyn_phy, init_dyn_phy
22	guez	18	use iniadvtrac_m, only: iniadvtrac
23	guez	26	use inidissip_m, only: inidissip
24	guez	54	use inifilr_m, only: inifilr
25	guez	26	use inigeom_m, only: inigeom
26			use initdynav_m, only: initdynav
27			use inithist_m, only: inithist
28	guez	30	USE calendar, only: ioconf_calendar
29			use histcom, only: histclo
30	guez	3	use leapfrog_m, only: leapfrog
31	guez	26	use logic, only: iflag_phys
32	guez	37	use suphec_m, only: suphec
33	guez	26	use temps, only: day_ref, annee_ref, day_end, itau_dyn
34			use tracstoke, only: istdyn, istphy
35	guez	38	use yoethf_m, only: yoethf
36	guez	3
37			IMPLICIT NONE
38
39			REAL zdtvr ! time step for dynamics, in s
40
41			! Variables dynamiques :
42	guez	55	REAL ucov(iim + 1, jjm + 1, llm), vcov(iim + 1, jjm, llm) ! vent covariant
43	guez	43	REAL teta(iim + 1, jjm + 1, llm) ! température potentielle
44	guez	40	REAL q(iim + 1, jjm + 1, llm, nqmx) ! champs advectés
45	guez	39	REAL ps(iim + 1, jjm + 1) ! pression au sol (Pa)
46	guez	55	REAL masse(iim + 1, jjm + 1, llm) ! masse d'air
47	guez	7	REAL phis(iim + 1, jjm + 1) ! géopotentiel au sol
48	guez	3
49			! Variables pour le fichier histoire :
50	guez	25	REAL time_0 ! time in day, as a fraction of day, in [0, 1[
51	guez	3
52			! Calendrier :
53			LOGICAL:: true_calendar = .false. ! default value
54
55			logical mask_v(iim + 1, jjm)
56			! (mask for points in the "v" grid, first index is for longitude,
57			! second index is for latitude)
58
59			namelist /main_nml/true_calendar
60
61			!------------------------------------------------------------
62
63			print *, "Enter namelist 'main_nml'."
64			read (unit=*, nml=main_nml)
65			write(unit=*, nml=main_nml)
66
67			! Choix du calendrier :
68			if (true_calendar) then
69			call ioconf_calendar('gregorian')
70			else
71			call ioconf_calendar('360d')
72			endif
73
74			! Lecture des fichiers "gcm.def" ou "run.def" :
75	guez	13	call read_clesphys2
76			CALL conf_gcm
77	guez	3
78			! Initialisation des traceurs
79			! Choix du schéma pour l'advection dans le fichier "traceur.def" ou via INCA
80	guez	23	call iniadvtrac
81	guez	3
82			! Lecture du fichier "start.nc" :
83			CALL dynetat0(vcov, ucov, teta, q, masse, ps, phis, time_0)
84
85	guez	36	! On remet le calendrier à zero si demandé :
86	guez	3	if (annee_ref /= anneeref .or. day_ref /= dayref) then
87			print *, 'Attention : les dates initiales lues dans le fichier ' // &
88			'"start" ne correspondent pas à celles lues dans "gcm.def".'
89	guez	15	if (raz_date) then
90	guez	3	print *, 'On réinitialise à la date lue dans "gcm.def".'
91			annee_ref = anneeref
92			day_ref = dayref
93			day_ini = dayref
94			itau_dyn = 0
95			time_0 = 0.
96	guez	15	else
97			print *, 'On garde les dates du fichier "start".'
98	guez	3	endif
99			ELSE
100	guez	15	raz_date = .false.
101	guez	3	endif
102
103	guez	36	! On recalcule éventuellement le pas de temps :
104	guez	3	zdtvr = daysec / REAL(day_step)
105			IF (dtvr /= zdtvr) THEN
106			print *, 'Warning: the time steps in the ".def" file and in ' // &
107			'"start.nc" are different'
108			print *, 'dtvr (from "start.nc") = ', dtvr
109			print *, 'zdtvr (from ".def") = ', zdtvr
110			print *, 'Using the value from the ".def" file.'
111			dtvr = zdtvr
112			ENDIF
113	guez	33
114	guez	36	CALL iniconst
115			CALL inigeom ! initialisation de la géometrie
116			CALL inifilr ! initialisation du filtre
117	guez	27	CALL inidissip
118	guez	3	call init_dyn_phy
119
120			! Initialisation de la physique :
121			IF (iflag_phys == 1) THEN
122	guez	37	rlatd(1)=rlatu(1)
123			rlatd(2:klon-1) = pack(spread(rlatu(2:jjm), 1, iim), .true.)
124			rlatd(klon)= rlatu(jjm + 1)
125	guez	3
126	guez	37	rlond(1)=0.
127			rlond(2:klon-1) = pack(spread(rlonv(:iim), 2, jjm - 1), .true.)
128			rlond(klon)= 0.
129	guez	3
130	guez	37	cuphy = pack(cu_2d, dyn_phy)
131	guez	3
132			! Construct a mask for points in the "v" grid:
133			mask_v = .true.
134			mask_v(2:, 1) = .false.
135			mask_v(iim + 1, 2:) = .false.
136
137	guez	37	cvphy(:klon - 1) = pack(cv_2d, mask_v)
138			cvphy(klon) = cv_2d(1, jjm)
139			! (that value of "cv_2d" is used twice in "cvphy")
140	guez	3
141	guez	37	airephy = pack(aire_2d, dyn_phy)
142			CALL suphec
143	guez	38	call yoethf
144	guez	3	ENDIF
145
146			! Initialisation des entrées-sorties :
147			day_end = day_ini + nday
148			print *, "day_ini = ", day_ini
149			print *, "day_end = ", day_end
150
151	guez	5	CALL dynredem0("restart.nc", day_end, phis)
152	guez	56	CALL inithist(day_ref, annee_ref, zdtvr, nqmx, t_ops = iecri * daysec, &
153			t_wrt = iecri * daysec)
154			CALL initdynav(day_ref, annee_ref, zdtvr, nqmx, t_ops = iperiod * zdtvr, &
155			t_wrt = periodav * daysec)
156	guez	3
157			! Choix des fréquences de stockage pour le hors-ligne :
158	guez	36	istdyn = day_step / 4 ! stockage toutes les 6 h = 1 jour / 4
159	guez	3	istphy = istdyn / iphysiq
160
161			! Intégration temporelle du modèle :
162	guez	23	CALL leapfrog(ucov, vcov, teta, ps, masse, phis, q, time_0)
163	guez	3
164	guez	10	call histclo
165			print *, 'Simulation finished'
166			print *, 'Everything is cool'
167
168	guez	3	END PROGRAM gcm