| 1 | module climat_forcage_mod |
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| 2 | |
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| 3 | ! Forcage climatique avec climat GCM et fichier de forcage temporel index |
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| 4 | ! lecture de fichiers Snapshots climatiques à temps t |
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| 5 | ! lecture d'un fichier de forcage (temp carotte de glace) |
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| 6 | ! possibilite d'utiliser autant de snapshots que l'on veut (ntr) |
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| 7 | ! fichiers de forcage, Snapshot et valeurs de lapse rate definis dans fichier param |
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| 8 | use module3d_phy,only:nx,ny,sealevel,slv,S,S0,Tmois,Tann,Tjuly,acc,num_forc,num_param,num_rep_42,coefbmshelf,PI,ro,time,dirforcage,dirnameinp |
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| 9 | use netcdf |
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| 10 | use io_netcdf_grisli |
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| 11 | |
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| 12 | |
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| 13 | implicit none |
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| 14 | character(len=80) :: filin |
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| 15 | integer :: nft ! nft est le nombre de lignes a lire dans le fichier |
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| 16 | ! contenant le forcage climatique |
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| 17 | real,dimension(:),allocatable :: tdate ! time for climate forcing |
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| 18 | real,dimension(:),allocatable :: alphat |
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| 19 | real,dimension(:),allocatable :: alphap |
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| 20 | real,dimension(:),allocatable :: spert |
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| 21 | |
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| 22 | |
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| 23 | real :: mincoefbmelt ! butoirs mini |
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| 24 | real :: maxcoefbmelt ! butoirs maxi de coefbmshelf |
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| 25 | character(len=100) :: clim_ref_file ! climat de reference |
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| 26 | character(len=100) :: forcage_file1 ! fichier de forcage 1 (climat+topo) |
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| 27 | character(len=100) :: forcage_file2 ! fichier de forcage 2 (climat+topo) |
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| 28 | |
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| 29 | character(len=80) :: filforc ! nom du fichier forcage |
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| 30 | |
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| 31 | |
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| 32 | integer,parameter :: ntr=2 ! nb of snapshot files now explicitely specified |
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| 33 | character(len=200) :: filtr(ntr) ! fichiers de forcage |
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| 34 | |
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| 35 | real,dimension(ntr) :: ttr !< date des tranches (snapshots) |
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| 36 | real,dimension(nx,ny,ntr) :: delta, deltj, rapact |
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| 37 | real,dimension(nx,ny) :: delTatime, delTjtime, rapactime |
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| 38 | real,dimension(nx,ny) :: Zs !< surface topography above sea level |
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| 39 | |
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| 40 | |
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| 41 | ! S0 topo de ref correspondant a la climato est lu dans lect_topo |
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| 42 | |
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| 43 | ! variables pour climato mensuelle : |
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| 44 | real,dimension(nx,ny,12) :: t2m0 !< initial monthly air temperature (climato) |
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| 45 | real,dimension(nx,ny,12) :: pr0 !< initial monthly precip (climato) |
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| 46 | |
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| 47 | ! climat des snapshots : |
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| 48 | real,dimension(nx,ny,12,ntr) :: t2m_ss !< t2m monthly for every GCM snapshot |
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| 49 | real,dimension(nx,ny,12,ntr) :: pr_ss !< precip monthly for every GCM snapshot |
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| 50 | real,dimension(nx,ny,ntr) :: orog_ss !< topo for every GCM snapshot |
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| 51 | |
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| 52 | real,dimension(nx,ny,12,ntr) :: t2m_sstopo0 !< t2m GCM snapshot on S0 |
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| 53 | real,dimension(nx,ny,12,ntr) :: pr_sstopo0 !< pr GCM snapshot on S0 |
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| 54 | |
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| 55 | real :: PYY !< constante pour calcul de la fraction solide des precips |
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| 56 | real :: psolid=2. !< temp limit between liquid and solid precip |
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| 57 | real,dimension(nx,ny) :: FT !< proportion of year with air temp below psolid |
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| 58 | real :: lapserate !< gradient vertical de temp annuel et juillet |
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| 59 | real :: rappact !< coef pour calcul du rapport accumulation |
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| 60 | logical :: annual !< True si forcage annuel, False si forcage mensuel |
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| 61 | |
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| 62 | contains |
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| 63 | |
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| 64 | !------------------------------------------------------------------------------------------ |
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| 65 | subroutine input_clim !routine qui permet d'initialiser les variables climatiques |
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| 66 | |
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| 67 | implicit none |
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| 68 | character(len=8) :: control !< label to check clim. forc. file (filin) is usable |
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| 69 | integer :: l !< in snapshot files:the first column is the mask, read but not used |
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| 70 | integer :: err !< recuperation erreur |
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| 71 | integer :: i,j,k,m |
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| 72 | real*8, dimension(:,:), pointer :: tab2d => null() !< tableau 2d pointer |
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| 73 | real*8, dimension(:,:,:), pointer :: tab3d => null() !< tableau 3d pointer |
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| 74 | |
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| 75 | deltatime(:,:)=0. |
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| 76 | deltjtime(:,:)=0. |
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| 77 | rapactime(:,:)=1. |
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| 78 | annual=.true. ! forcage avec fichier Tann et Tjuly |
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| 79 | |
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| 80 | ! lecture du climat de reference : climato mensuelle |
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| 81 | print*,'lecture du climat de reference: ',trim(DIRNAMEINP)//TRIM(clim_ref_file) |
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| 82 | call Read_Ncdf_var('precip',trim(DIRNAMEINP)//TRIM(clim_ref_file),tab3d) |
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| 83 | pr0(:,:,:)=tab3d(:,:,:) |
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| 84 | call Read_Ncdf_var('t2m',trim(DIRNAMEINP)//TRIM(clim_ref_file),tab3d) |
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| 85 | t2m0(:,:,:)=tab3d(:,:,:) |
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| 86 | |
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| 87 | filtr(1)=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(forcage_file1) |
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| 88 | filtr(2)=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(forcage_file2) |
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| 89 | |
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| 90 | ! fichiers donnant l'evolution temporelle |
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| 91 | ! ----------------------------------------- |
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| 92 | ! Pour rappel hemin40 : |
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| 93 | ! fichier forcage : signal-cycle-hemin.dat |
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| 94 | ! Pour anteis : |
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| 95 | ! fichier forcage : forcmodif4cycles.dat |
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| 96 | filin=trim(dirforcage)//trim(filforc) |
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| 97 | |
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| 98 | |
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| 99 | ! lecture des fichiers snapshots pour n'importe quel geoplace |
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| 100 | ! ------------------------------------------------------------- |
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| 101 | do k=1,ntr |
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| 102 | write(6,*) 'Read climate file :',trim(filtr(k)) |
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| 103 | call Read_Ncdf_var('pr',trim(filtr(k)),tab3d) |
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| 104 | pr_ss(:,:,:,k)=tab3d(:,:,:) |
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| 105 | call Read_Ncdf_var('tas',trim(filtr(k)),tab3d) |
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| 106 | t2m_ss(:,:,:,k)=tab3d(:,:,:) |
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| 107 | call Read_Ncdf_var('orog',trim(filtr(k)),tab2d) |
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| 108 | orog_ss(:,:,k)=tab2d(:,:) |
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| 109 | !~ read(num_forc,*) ttr(k) |
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| 110 | !~ read(num_forc,*) |
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| 111 | !~ read(num_forc,*) |
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| 112 | !~ do j=1,ny |
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| 113 | !~ do i=1,nx |
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| 114 | !~ read(num_forc,*) l,rapact(i,j,k),delta(i,j,k),deltj(i,j,k) |
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| 115 | !~ end do |
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| 116 | !~ end do |
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| 117 | !~ close(num_forc) |
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| 118 | end do |
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| 119 | |
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| 120 | |
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| 121 | ! calcul de t2m et pr sur la topo des obs : |
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| 122 | do m=1,12 |
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| 123 | do k=1,ntr |
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| 124 | t2m_sstopo0(:,:,m,k)=t2m_ss(:,:,m,k)-lapserate*(S0(:,:)-orog_ss(:,:,m)) |
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| 125 | pr_sstopo0(:,:,m,k)=pr_ss(:,:,m,k)*exp(rappact*(t2m_sstopo0(:,:,m,k)-t2m_ss(:,:,m,k))) |
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| 126 | enddo |
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| 127 | enddo |
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| 128 | |
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| 129 | |
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| 130 | ! lecture des fichiers d'evolution pour tout geoplace |
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| 131 | ! ---------------------------------------------------- |
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| 132 | open(num_forc,file=filin,status='old') |
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| 133 | ! print*,nft |
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| 134 | read(num_forc,*) control,nft |
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| 135 | print*,'control',control,nft |
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| 136 | ! determination of file size (line nb), allocation of perturbation array |
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| 137 | |
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| 138 | if (control.ne.'nb_lines') then |
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| 139 | write(6,*) filin,'indiquer le nb de ligne en debut de fichier:' |
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| 140 | write(6,*) 'le nb de lignes et le label de control nb_lines' |
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| 141 | stop |
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| 142 | endif |
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| 143 | |
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| 144 | if (.not.allocated(tdate)) THEN |
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| 145 | allocate(tdate(nft),stat=err) |
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| 146 | if (err/=0) then |
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| 147 | print *,"erreur à l'allocation du tableau tdate",err |
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| 148 | stop 4 |
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| 149 | end if |
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| 150 | end if |
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| 151 | |
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| 152 | if (.not.allocated(alphat)) THEN |
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| 153 | allocate(alphat(nft),stat=err) |
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| 154 | if (err/=0) then |
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| 155 | print *,"erreur à l'allocation du tableau tpert",err |
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| 156 | stop 4 |
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| 157 | end if |
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| 158 | end if |
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| 159 | |
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| 160 | if (.not.allocated(alphap)) THEN |
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| 161 | allocate(alphap(nft),stat=err) |
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| 162 | if (err/=0) then |
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| 163 | print *,"erreur à l'allocation du tableau tpert",err |
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| 164 | stop 4 |
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| 165 | end if |
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| 166 | end if |
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| 167 | |
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| 168 | if (.not.allocated(spert)) THEN |
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| 169 | allocate(spert(nft),stat=err) |
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| 170 | if (err/=0) then |
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| 171 | print *,"erreur à l'allocation du tableau spert",err |
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| 172 | stop 4 |
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| 173 | end if |
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| 174 | end if |
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| 175 | |
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| 176 | do i=1,nft |
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| 177 | read(num_forc,*) tdate(i),alphat(i),alphap(i),spert(i) |
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| 178 | end do |
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| 179 | |
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| 180 | close(num_forc) |
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| 181 | |
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| 182 | |
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| 183 | end subroutine input_clim |
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| 184 | |
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| 185 | |
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| 186 | !-------------------------------------------------------------------------------- |
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| 187 | subroutine init_forclim |
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| 188 | |
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| 189 | |
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| 190 | namelist/clim_forcage/clim_ref_file,ttr,forcage_file1,forcage_file2,rappact,mincoefbmelt,maxcoefbmelt,filforc,lapserate |
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| 191 | |
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| 192 | rewind(num_param) ! pour revenir au debut du fichier param_list.dat |
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| 193 | read(num_param,clim_forcage) |
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| 194 | |
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| 195 | |
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| 196 | ! formats pour les ecritures dans 42 |
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| 197 | 428 format(A) |
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| 198 | |
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| 199 | write(num_rep_42,428)'!___________________________________________________________' |
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| 200 | write(num_rep_42,428) '&clim_forcage ! nom du bloc ' |
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| 201 | write(num_rep_42,*) |
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| 202 | write(num_rep_42,'(A,A)') 'clim_ref_file = ', clim_ref_file |
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| 203 | write(num_rep_42,'(A,A)') 'ttr = ', ttr(:) |
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| 204 | write(num_rep_42,'(A,A)') 'forcage_file1 = ', forcage_file1 |
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| 205 | write(num_rep_42,'(A,A)') 'forcage_file2 = ', forcage_file2 |
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| 206 | write(num_rep_42,'(A,A)') 'rappact = ', rappact |
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| 207 | write(num_rep_42,*) 'mincoefbmelt = ', mincoefbmelt |
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| 208 | write(num_rep_42,*) 'maxcoefbmelt = ', maxcoefbmelt |
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| 209 | write(num_rep_42,'(A,A)') ' filforc = ', filforc |
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| 210 | write(num_rep_42,*) 'lapserate = ', lapserate |
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| 211 | write(num_rep_42,*)'/' |
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| 212 | write(num_rep_42,*) |
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| 213 | |
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| 214 | PYY=2.*PI/50. |
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| 215 | |
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| 216 | end subroutine init_forclim |
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| 217 | |
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| 218 | |
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| 219 | !--------------------------------------------------------------------- |
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| 220 | !forcage climatique au cours du temps |
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| 221 | |
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| 222 | subroutine forclim |
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| 223 | |
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| 224 | !$ USE OMP_LIB |
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| 225 | |
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| 226 | implicit none |
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| 227 | real :: coeft,coefp,coeftime !< coeftime is not used |
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| 228 | integer :: l !< dumm index for loops on snapsots files l=itr,ntr-1 |
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| 229 | integer :: itr !< nb of the current snapshot file (change with time) |
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| 230 | integer :: i,j,k,m |
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| 231 | integer :: ift !< indice correspondant au pas de temps du fichier de forcage |
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| 232 | real :: TEMP !< calcul du nbr de jour < psolid |
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| 233 | real,dimension(nx,ny) :: deltaZs ! diff temp par rapport a topo S0 |
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| 234 | real,dimension(nx,ny,12) :: prmois ! precip sur topo Zs |
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| 235 | |
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| 236 | |
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| 237 | |
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| 238 | if(time.le.tdate(1)) then ! time avant le debut du fichier forcage |
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| 239 | sealevel=spert(1) |
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| 240 | coeft=alphat(1) |
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| 241 | coefp=alphap(1) |
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| 242 | ift=1 |
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| 243 | |
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| 244 | else if (time.ge.tdate(nft)) then ! time apres la fin du fichier forcage |
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| 245 | sealevel=spert(nft) |
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| 246 | coeft=alphat(nft) |
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| 247 | coefp=alphap(nft) |
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| 248 | ift=nft |
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| 249 | |
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| 250 | else ! time en general |
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| 251 | |
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| 252 | ift = 1 |
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| 253 | do i=ift,nft-1 ! interpolation entre i et i+1 |
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| 254 | |
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| 255 | if((time.ge.tdate(i)).and.(time.lt.tdate(i+1))) then ! cas general |
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| 256 | sealevel=spert(i)+(spert(i+1)-spert(i))* & |
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| 257 | (time-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 258 | |
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| 259 | coeft=alphat(i)+(alphat(i+1)-alphat(i))* & |
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| 260 | (time-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 261 | |
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| 262 | coefp=alphap(i)+(alphap(i+1)-alphap(i))* & |
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| 263 | (time-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 264 | |
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| 265 | ift=i |
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| 266 | goto 100 |
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| 267 | endif |
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| 268 | end do |
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| 269 | endif |
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| 270 | 100 continue |
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| 271 | |
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| 272 | slv(:,:)=sealevel |
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| 273 | |
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| 274 | if(time.le.ttr(1)) then ! time en dehors des limites du fichier forcage |
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| 275 | coeftime=0. |
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| 276 | !~ do j=1,ny |
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| 277 | !~ do i=1,nx |
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| 278 | !~ deltatime(i,j)=delta(i,j,1) |
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| 279 | !~ deltjtime(i,j)=deltj(i,j,1) |
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| 280 | !~ rapactime(i,j)=rapact(i,j,1) |
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| 281 | !~ end do |
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| 282 | !~ end do |
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| 283 | itr=1 |
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| 284 | else if (time.ge.ttr(ntr)) then ! mis a 0 |
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| 285 | coeftime=1. |
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| 286 | itr=ntr |
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| 287 | !~ do j=1,ny |
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| 288 | !~ do i=1,nx |
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| 289 | !~ deltatime(i,j)=delta(i,j,ntr) |
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| 290 | !~ deltjtime(i,j)=deltj(i,j,ntr) |
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| 291 | !~ rapactime(i,j)=rapact(i,j,ntr) |
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| 292 | !~ end do |
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| 293 | !~ end do |
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| 294 | else ! interpolation entre l et l+1 : cas general |
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| 295 | itr=1 |
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| 296 | do l=itr,ntr-1 ! interpolation entre i et i+1 |
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| 297 | if((time.ge.ttr(l)).and.(time.lt.ttr(l+1))) then ! test tranche |
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| 298 | coeftime= (time-ttr(l))/(ttr(l+1)-ttr(l)) |
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| 299 | ! do j=1,ny |
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| 300 | ! do i=1,nx |
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| 301 | ! delTatime(i,j)=delta(i,j,l)+ & |
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| 302 | ! (delta(i,j,l+1)-delta(i,j,l))*coeft |
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| 303 | ! delTjtime(i,j)=deltj(i,j,l)+ & |
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| 304 | ! (deltj(i,j,l+1)-deltj(i,j,l))*coeft |
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| 305 | ! rapactime(i,j)=rapact(i,j,l)+ & |
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| 306 | ! (rapact(i,j,l+1)-rapact(i,j,l))*coefp |
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| 307 | ! end do |
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| 308 | ! end do |
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| 309 | itr=l |
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| 310 | endif ! fin du test sur la tranche |
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| 311 | end do |
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| 312 | endif ! fin du test avant,apres,milieu |
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| 313 | |
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| 314 | |
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| 315 | ! test avec coefbmshelf fonction de coeft (1 a l'actuel et proche de 0 en glaciaire) |
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| 316 | coefbmshelf=coeft |
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| 317 | !coefbmshelf=1. ! modif pour test de sensibilite (tof 20 avril 01) |
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| 318 | coefbmshelf=max(coefbmshelf,mincoefbmelt) |
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| 319 | coefbmshelf=min(coefbmshelf,maxcoefbmelt) |
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| 320 | |
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| 321 | !if (geoplace(1:5).eq.'hemin') then |
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| 322 | |
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| 323 | !$OMP PARALLEL |
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| 324 | ! calcul de Tjuly et et Tann |
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| 325 | !$OMP WORKSHARE |
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| 326 | Zs(:,:)=max(slv(:,:),S(:,:)) |
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| 327 | deltaZs(:,:)= -lapserate*(Zs(:,:)-S0(:,:)) ! difference de temperature entre Zs et S0 |
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| 328 | !$OMP END WORKSHARE |
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| 329 | ! correction d'altitude |
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| 330 | do m=1,12 |
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| 331 | ! Temp et precip fonction de coeftime : |
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| 332 | if (itr.LT.ntr) then |
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| 333 | !$OMP WORKSHARE |
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| 334 | Tmois(:,:,m)= (t2m_sstopo0(:,:,m,itr) - t2m_sstopo0(:,:,m,itr+1))*(1-coeftime) + t2m0(:,:,m) + deltaZs(:,:) |
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| 335 | prmois(:,:,m)= pr0(:,:,m)*(coeftime+(1-coeftime)*(pr_sstopo0(:,:,m,itr)/pr_sstopo0(:,:,m,itr+1))) * exp(rappact*(deltaZs(:,:))) |
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| 336 | !$OMP END WORKSHARE |
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| 337 | else ! itr=ntr (time>tsnapmax) |
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| 338 | !$OMP WORKSHARE |
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| 339 | Tmois(:,:,m)= t2m0(:,:,m) + deltaZs(:,:) |
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| 340 | prmois(:,:,m)= pr0(:,:,m)*exp(rappact*(deltaZs(:,:))) |
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| 341 | !$OMP END WORKSHARE |
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| 342 | endif |
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| 343 | enddo |
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| 344 | |
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| 345 | |
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| 346 | |
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| 347 | print*,'Tmois',Tmois(142,14,1) |
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| 348 | print*,'prmois',prmois(142,14,1) |
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| 349 | !$OMP WORKSHARE |
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| 350 | Tann=sum(Tmois,dim=3)/12. |
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| 351 | Tjuly=Tmois(:,:,7) |
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| 352 | |
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| 353 | |
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| 354 | |
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| 355 | |
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| 356 | ! calcul de l'accumulation de neige : |
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| 357 | acc(:,:)=sum(prmois,dim=3,mask=Tmois < psolid) |
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| 358 | acc(:,:)=acc(:,:)*1000./ro ! conversion en glace |
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| 359 | !$OMP END WORKSHARE |
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| 360 | !$OMP END PARALLEL |
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| 361 | !debug |
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| 362 | !print*,'Tann, Tjuly',Tann(142,14),Tjuly(142,14) |
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| 363 | !print*,'acc',acc(142,14) |
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| 364 | |
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| 365 | end subroutine forclim |
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| 366 | |
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| 367 | end module climat_forcage_mod |
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