| 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,sealevel_2d,S,Tmois,Tann,Tjuly,acc,num_forc,num_param,num_rep_42,tafor,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=100) :: 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 :: tpert |
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| 19 | real,dimension(:),allocatable :: spert |
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| 20 | real,dimension(:),allocatable :: bpert |
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| 21 | |
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| 22 | character(len=100) :: clim_ref_file ! climat de reference |
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| 23 | character(len=100) :: forcage_file1 ! fichier de forcage 1 (climat+topo) |
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| 24 | character(len=100) :: forcage_file2 ! fichier de forcage 2 (climat+topo) |
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| 25 | |
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| 26 | character(len=100) :: filforc ! nom du fichier forcage |
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| 27 | real :: coefT !< pour modifier l'amplitude de la perturb. T |
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| 28 | integer :: pertbmb !< boolean: do we modify the bmelt under ice shelves? |
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| 29 | real :: coefbmb !< if we modify the bmelt, we read a perturbation (based on dD, insolation, etc.) and apply this coefficient |
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| 30 | real :: r_atmvar !< a ratio to account fast atmos variability between the 2 snapshots (in %: 0=>no fast var,1=>only fast var) |
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| 31 | |
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| 32 | |
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| 33 | integer,parameter :: ntr=2 ! nb of snapshot files now explicitely specified |
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| 34 | character(len=200) :: filtr(ntr) ! fichiers de forcage |
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| 35 | |
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| 36 | real,dimension(ntr) :: ttr !< date des tranches (snapshots) |
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| 37 | real,dimension(nx,ny,ntr) :: delta, deltj, rapact |
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| 38 | real,dimension(nx,ny) :: delTatime, delTjtime, rapactime |
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| 39 | real,dimension(nx,ny) :: Zs !< surface topography above sea level |
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| 40 | |
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| 41 | integer :: typerun ! 1 for steady state using snap 1, |
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| 42 | ! 2 for steady state using snap 2 ... |
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| 43 | ! 0 for transient |
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| 44 | |
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| 45 | ! variables pour climato mensuelle : |
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| 46 | real,dimension(nx,ny,12) :: t2m0 !< initial monthly air temperature (climato) |
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| 47 | real,dimension(nx,ny,12) :: pr0 !< initial monthly precip (climato) |
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| 48 | real,dimension(nx,ny) :: orog0 !< topo de la climato |
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| 49 | |
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| 50 | ! climat des snapshots : |
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| 51 | real,dimension(nx,ny,12,ntr) :: t2m_ss !< t2m monthly for every GCM snapshot |
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| 52 | real,dimension(nx,ny,12,ntr) :: pr_ss !< precip monthly for every GCM snapshot |
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| 53 | real,dimension(nx,ny,ntr) :: orog_ss !< topo for every GCM snapshot |
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| 54 | |
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| 55 | real,dimension(nx,ny,12,ntr) :: t2m_sstopo0 !< t2m GCM snapshot on orog0 |
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| 56 | real,dimension(nx,ny,12,ntr) :: pr_sstopo0 !< pr GCM snapshot on orog0 |
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| 57 | |
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| 58 | real :: PYY !< constante pour calcul de la fraction solide des precips |
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| 59 | real :: psolid=2. !< temp limit between liquid and solid precip |
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| 60 | real,dimension(nx,ny) :: FT !< proportion of year with air temp below psolid |
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| 61 | real :: lapserate !< gradient vertical de temp annuel et juillet |
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| 62 | real :: rappact !< coef pour calcul du rapport accumulation |
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| 63 | logical :: annual !< True si forcage annuel, False si forcage mensuel |
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| 64 | |
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| 65 | contains |
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| 66 | |
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| 67 | !------------------------------------------------------------------------------------------ |
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| 68 | subroutine input_clim !routine qui permet d'initialiser les variables climatiques |
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| 69 | |
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| 70 | implicit none |
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| 71 | character(len=8) :: control !< label to check clim. forc. file (filin) is usable |
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| 72 | integer :: l !< in snapshot files:the first column is the mask, read but not used |
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| 73 | integer :: err !< recuperation erreur |
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| 74 | integer :: i,j,k,m |
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| 75 | real*8, dimension(:,:), pointer :: tab2d => null() !< tableau 2d pointer |
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| 76 | real*8, dimension(:,:,:), pointer :: tab3d => null() !< tableau 3d pointer |
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| 77 | |
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| 78 | deltatime(:,:)=0. |
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| 79 | deltjtime(:,:)=0. |
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| 80 | rapactime(:,:)=1. |
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| 81 | annual=.true. ! forcage avec fichier Tann et Tjuly |
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| 82 | |
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| 83 | ! lecture du climat de reference : climato mensuelle |
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| 84 | print*,'lecture du climat de reference: ',trim(DIRNAMEINP)//TRIM(clim_ref_file) |
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| 85 | call Read_Ncdf_var('precip',trim(DIRNAMEINP)//TRIM(clim_ref_file),tab3d) |
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| 86 | pr0(:,:,:)=tab3d(:,:,:) |
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| 87 | call Read_Ncdf_var('t2m',trim(DIRNAMEINP)//TRIM(clim_ref_file),tab3d) |
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| 88 | t2m0(:,:,:)=tab3d(:,:,:) |
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| 89 | call Read_Ncdf_var('orog',trim(DIRNAMEINP)//TRIM(clim_ref_file),tab2d) |
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| 90 | orog0(:,:)=tab2d(:,:) |
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| 91 | |
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| 92 | filtr(1)=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(forcage_file1) |
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| 93 | filtr(2)=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(forcage_file2) |
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| 94 | |
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| 95 | ! fichiers donnant l'evolution temporelle |
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| 96 | ! ----------------------------------------- |
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| 97 | ! Pour rappel hemin40 : |
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| 98 | ! fichier forcage : signal-cycle-hemin.dat |
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| 99 | ! Pour anteis : |
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| 100 | ! fichier forcage : forcmodif4cycles.dat |
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| 101 | filin=trim(dirforcage)//trim(filforc) |
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| 102 | |
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| 103 | |
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| 104 | ! lecture des fichiers snapshots pour n'importe quel geoplace |
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| 105 | ! ------------------------------------------------------------- |
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| 106 | do k=1,ntr |
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| 107 | write(6,*) 'Read climate file :',trim(filtr(k)) |
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| 108 | call Read_Ncdf_var('pr',trim(filtr(k)),tab3d) |
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| 109 | pr_ss(:,:,:,k)=tab3d(:,:,:) |
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| 110 | call Read_Ncdf_var('tas',trim(filtr(k)),tab3d) |
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| 111 | t2m_ss(:,:,:,k)=tab3d(:,:,:) |
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| 112 | call Read_Ncdf_var('orog',trim(filtr(k)),tab2d) |
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| 113 | orog_ss(:,:,k)=tab2d(:,:) |
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| 114 | !~ read(num_forc,*) ttr(k) |
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| 115 | !~ read(num_forc,*) |
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| 116 | !~ read(num_forc,*) |
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| 117 | !~ do j=1,ny |
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| 118 | !~ do i=1,nx |
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| 119 | !~ read(num_forc,*) l,rapact(i,j,k),delta(i,j,k),deltj(i,j,k) |
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| 120 | !~ end do |
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| 121 | !~ end do |
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| 122 | !~ close(num_forc) |
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| 123 | end do |
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| 124 | |
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| 125 | |
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| 126 | ! calcul de t2m et pr sur la topo des obs : |
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| 127 | do m=1,12 |
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| 128 | do k=1,ntr |
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| 129 | t2m_sstopo0(:,:,m,k)=t2m_ss(:,:,m,k)-lapserate*(orog0(:,:)-orog_ss(:,:,k)) |
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| 130 | pr_sstopo0(:,:,m,k)=pr_ss(:,:,m,k)*exp(rappact*(t2m_sstopo0(:,:,m,k)-t2m_ss(:,:,m,k))) |
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| 131 | enddo |
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| 132 | enddo |
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| 133 | |
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| 134 | |
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| 135 | ! lecture des fichiers d'evolution pour tout geoplace |
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| 136 | ! ---------------------------------------------------- |
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| 137 | open(num_forc,file=filin,status='old') |
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| 138 | ! print*,nft |
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| 139 | read(num_forc,*) control,nft |
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| 140 | print*,'control',control,nft |
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| 141 | ! determination of file size (line nb), allocation of perturbation array |
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| 142 | |
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| 143 | if (control.ne.'nb_lines') then |
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| 144 | write(6,*) filin,'indiquer le nb de ligne en debut de fichier:' |
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| 145 | write(6,*) 'le nb de lignes et le label de control nb_lines' |
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| 146 | stop |
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| 147 | endif |
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| 148 | |
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| 149 | if (.not.allocated(tdate)) THEN |
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| 150 | allocate(tdate(nft),stat=err) |
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| 151 | if (err/=0) then |
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| 152 | print *,"erreur à l'allocation du tableau tdate",err |
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| 153 | stop 4 |
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| 154 | end if |
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| 155 | end if |
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| 156 | |
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| 157 | if (.not.allocated(tpert)) THEN |
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| 158 | allocate(tpert(nft),stat=err) |
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| 159 | if (err/=0) then |
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| 160 | print *,"erreur à l'allocation du tableau tpert",err |
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| 161 | stop 4 |
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| 162 | end if |
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| 163 | end if |
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| 164 | |
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| 165 | if (.not.allocated(bpert)) THEN |
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| 166 | allocate(bpert(nft),stat=err) |
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| 167 | if (err/=0) then |
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| 168 | print *,"erreur à l'allocation du tableau tpert",err |
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| 169 | stop 4 |
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| 170 | end if |
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| 171 | end if |
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| 172 | |
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| 173 | if (.not.allocated(spert)) THEN |
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| 174 | allocate(spert(nft),stat=err) |
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| 175 | if (err/=0) then |
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| 176 | print *,"erreur à l'allocation du tableau spert",err |
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| 177 | stop 4 |
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| 178 | end if |
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| 179 | end if |
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| 180 | |
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| 181 | do i=1,nft |
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| 182 | if (pertbmb==1) then |
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| 183 | read(num_forc,*) tdate(i),spert(i),tpert(i),bpert(i) |
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| 184 | else |
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| 185 | read(num_forc,*) tdate(i),spert(i),tpert(i) |
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| 186 | bpert(i)=0. |
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| 187 | endif |
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| 188 | end do |
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| 189 | |
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| 190 | close(num_forc) |
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| 191 | |
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| 192 | ! Warning: when using climat_forcage we should in principle use a tpert which is a glacial index (ranging from about 0 to 1) |
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| 193 | ! here we should use the coefT to scale the signal if needed |
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| 194 | ! the coefbmb now is copy and paste from what we have done for Antarctica in Quiquet et al. GMD 2018 |
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| 195 | |
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| 196 | tpert(:)=tpert(:)*coefT |
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| 197 | bpert(:)=max(1.+bpert(:)*coefbmb,0.01) !freezing is not allowed |
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| 198 | |
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| 199 | |
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| 200 | |
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| 201 | end subroutine input_clim |
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| 202 | |
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| 203 | |
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| 204 | !-------------------------------------------------------------------------------- |
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| 205 | subroutine init_forclim |
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| 206 | |
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| 207 | |
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| 208 | namelist/clim_forcage/clim_ref_file,ttr,forcage_file1,forcage_file2,typerun,lapserate,rappact,filforc,pertbmb,coeft,coefbmb,r_atmvar |
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| 209 | |
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| 210 | rewind(num_param) ! pour revenir au debut du fichier param_list.dat |
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| 211 | read(num_param,clim_forcage) |
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| 212 | |
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| 213 | write(num_rep_42,'(A)')'!___________________________________________________________' |
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| 214 | write(num_rep_42,'(A)') '&clim_forcage ! nom du bloc ' |
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| 215 | write(num_rep_42,*) |
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| 216 | write(num_rep_42,'(A,A,A)') 'clim_ref_file = "',trim(clim_ref_file),'"' |
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| 217 | write(num_rep_42,*) 'ttr = ', ttr |
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| 218 | write(num_rep_42,'(A,A,A)') 'forcage_file1 = "',trim(forcage_file1),'"' |
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| 219 | write(num_rep_42,'(A,A,A)') 'forcage_file2 = "',trim(forcage_file2),'"' |
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| 220 | write(num_rep_42,*) 'typerun = ', typerun |
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| 221 | write(num_rep_42,*) 'lapserate = ', lapserate |
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| 222 | write(num_rep_42,*) 'rappact = ', rappact |
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| 223 | write(num_rep_42,'(A,A,A)') ' filforc = "',trim(filforc),'"' |
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| 224 | write(num_rep_42,*) 'pertbmb = ', pertbmb |
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| 225 | write(num_rep_42,*) 'coefT = ', coefT |
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| 226 | write(num_rep_42,*) 'coefbmb = ', coefbmb |
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| 227 | write(num_rep_42,*) 'r_atmvar = ', r_atmvar |
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| 228 | write(num_rep_42,*)'/' |
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| 229 | write(num_rep_42,*) |
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| 230 | |
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| 231 | PYY=2.*PI/50. |
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| 232 | |
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| 233 | end subroutine init_forclim |
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| 234 | |
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| 235 | |
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| 236 | !--------------------------------------------------------------------- |
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| 237 | !forcage climatique au cours du temps |
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| 238 | |
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| 239 | subroutine forclim |
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| 240 | |
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| 241 | !$ USE OMP_LIB |
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| 242 | |
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| 243 | implicit none |
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| 244 | real :: coeftime !< coeftime is not used |
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| 245 | real :: tafor |
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| 246 | integer :: l !< dumm index for loops on snapsots files l=itr,ntr-1 |
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| 247 | integer :: itr !< nb of the current snapshot file (change with time) |
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| 248 | integer :: i,j,k,m |
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| 249 | integer :: ift !< indice correspondant au pas de temps du fichier de forcage |
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| 250 | real :: TEMP !< calcul du nbr de jour < psolid |
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| 251 | real,dimension(nx,ny) :: deltaZs ! diff temp par rapport a topo orog0 |
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| 252 | real,dimension(nx,ny,12) :: prmois ! precip sur topo Zs |
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| 253 | |
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| 254 | real (kind=kind(0.d0)) :: timeloc |
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| 255 | |
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| 256 | if (typerun.eq.0) then |
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| 257 | timeloc = time |
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| 258 | else if ( (typerun .gt. 0) .and. (typerun .le. ubound(ttr,dim=1)) ) then |
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| 259 | timeloc = ttr(typerun) |
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| 260 | else |
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| 261 | write(*,*) "Unknown type of simulation for climat_forcage, abort" |
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| 262 | STOP |
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| 263 | end if |
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| 264 | |
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| 265 | if(timeloc.le.tdate(1)) then ! time avant le debut du fichier forcage |
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| 266 | sealevel=spert(1) |
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| 267 | tafor=tpert(1) |
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| 268 | coefbmshelf=bpert(1) |
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| 269 | ift=1 |
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| 270 | |
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| 271 | else if (timeloc.ge.tdate(nft)) then ! time apres la fin du fichier forcage |
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| 272 | sealevel=spert(nft) |
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| 273 | tafor=tpert(nft) |
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| 274 | coefbmshelf=bpert(nft) |
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| 275 | ift=nft |
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| 276 | |
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| 277 | else ! time en general |
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| 278 | |
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| 279 | ift = 1 |
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| 280 | do i=ift,nft-1 ! interpolation entre i et i+1 |
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| 281 | |
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| 282 | if((timeloc.ge.tdate(i)).and.(timeloc.lt.tdate(i+1))) then ! cas general |
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| 283 | sealevel=spert(i)+(spert(i+1)-spert(i))* & |
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| 284 | (timeloc-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 285 | |
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| 286 | tafor=tpert(i)+(tpert(i+1)-tpert(i))* & |
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| 287 | (timeloc-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 288 | |
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| 289 | coefbmshelf=bpert(i)+(bpert(i+1)-bpert(i))* & |
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| 290 | (timeloc-tdate(i))/(tdate(i+1)-tdate(i)) |
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| 291 | |
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| 292 | ift=i |
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| 293 | goto 100 |
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| 294 | endif |
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| 295 | end do |
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| 296 | endif |
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| 297 | 100 continue |
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| 298 | |
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| 299 | |
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| 300 | !same as for the GMD2018 paper: |
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| 301 | !afq -- as in Pollard and Deconto, melt is more efficient at high temperature... -> |
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| 302 | if (coefbmshelf.gt.1.) then |
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| 303 | coefbmshelf = 1. + ( coefbmshelf - 1. ) * 1.5 !afq.... tuning for the degla?... |
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| 304 | end if |
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| 305 | |
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| 306 | sealevel_2d(:,:)=sealevel |
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| 307 | |
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| 308 | if(timeloc.le.ttr(1)) then ! time en dehors des limites du fichier forcage |
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| 309 | coeftime=0. |
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| 310 | !~ do j=1,ny |
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| 311 | !~ do i=1,nx |
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| 312 | !~ deltatime(i,j)=delta(i,j,1) |
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| 313 | !~ deltjtime(i,j)=deltj(i,j,1) |
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| 314 | !~ rapactime(i,j)=rapact(i,j,1) |
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| 315 | !~ end do |
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| 316 | !~ end do |
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| 317 | itr=1 |
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| 318 | else if (timeloc.ge.ttr(ntr)) then ! mis a 0 |
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| 319 | coeftime=1. |
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| 320 | itr=ntr |
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| 321 | !~ do j=1,ny |
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| 322 | !~ do i=1,nx |
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| 323 | !~ deltatime(i,j)=delta(i,j,ntr) |
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| 324 | !~ deltjtime(i,j)=deltj(i,j,ntr) |
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| 325 | !~ rapactime(i,j)=rapact(i,j,ntr) |
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| 326 | !~ end do |
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| 327 | !~ end do |
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| 328 | else ! interpolation entre l et l+1 : cas general |
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| 329 | itr=1 |
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| 330 | do l=itr,ntr-1 ! interpolation entre i et i+1 |
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| 331 | if((timeloc.ge.ttr(l)).and.(timeloc.lt.ttr(l+1))) then ! test tranche |
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| 332 | coeftime= (timeloc-ttr(l))/(ttr(l+1)-ttr(l)) |
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| 333 | ! do j=1,ny |
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| 334 | ! do i=1,nx |
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| 335 | ! delTatime(i,j)=delta(i,j,l)+ & |
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| 336 | ! (delta(i,j,l+1)-delta(i,j,l))*coeft |
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| 337 | ! delTjtime(i,j)=deltj(i,j,l)+ & |
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| 338 | ! (deltj(i,j,l+1)-deltj(i,j,l))*coeft |
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| 339 | ! rapactime(i,j)=rapact(i,j,l)+ & |
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| 340 | ! (rapact(i,j,l+1)-rapact(i,j,l))*coefp |
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| 341 | ! end do |
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| 342 | ! end do |
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| 343 | itr=l |
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| 344 | endif ! fin du test sur la tranche |
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| 345 | end do |
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| 346 | endif ! fin du test avant,apres,milieu |
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| 347 | |
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| 348 | if (abs(Tafor).gt.2.) then |
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| 349 | write(*,*) "A glacial index greater than 2? Really??" |
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| 350 | STOP |
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| 351 | endif |
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| 352 | coeftime = (1-r_atmvar)*coeftime + r_atmvar*(1-Tafor) |
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| 353 | |
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| 354 | !if (geoplace(1:5).eq.'hemin') then |
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| 355 | |
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| 356 | !$OMP PARALLEL |
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| 357 | ! calcul de Tjuly et et Tann |
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| 358 | !$OMP WORKSHARE |
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| 359 | Zs(:,:)=max(sealevel_2d(:,:),S(:,:)) |
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| 360 | deltaZs(:,:)= -lapserate*(Zs(:,:)-orog0(:,:)) ! difference de temperature entre Zs et orog0 |
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| 361 | !$OMP END WORKSHARE |
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| 362 | ! correction d'altitude |
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| 363 | do m=1,12 |
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| 364 | ! Temp et precip fonction de coeftime : |
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| 365 | if (itr.LT.ntr) then |
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| 366 | !$OMP WORKSHARE |
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| 367 | Tmois(:,:,m)= (t2m_sstopo0(:,:,m,itr) - t2m_sstopo0(:,:,m,itr+1))*(1-coeftime) + t2m0(:,:,m) + deltaZs(:,:) |
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| 368 | prmois(:,:,m)= pr0(:,:,m)*(coeftime+(1-coeftime)*(pr_sstopo0(:,:,m,itr)/pr_sstopo0(:,:,m,itr+1))) * exp(rappact*(deltaZs(:,:))) |
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| 369 | !$OMP END WORKSHARE |
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| 370 | else ! itr=ntr (time>tsnapmax) |
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| 371 | !$OMP WORKSHARE |
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| 372 | Tmois(:,:,m)= t2m0(:,:,m) + deltaZs(:,:) |
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| 373 | prmois(:,:,m)= pr0(:,:,m)*exp(rappact*(deltaZs(:,:))) |
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| 374 | !$OMP END WORKSHARE |
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| 375 | endif |
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| 376 | enddo |
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| 377 | |
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| 378 | |
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| 379 | |
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| 380 | !$OMP WORKSHARE |
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| 381 | Tann=sum(Tmois,dim=3)/12. |
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| 382 | Tjuly=Tmois(:,:,7) |
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| 383 | |
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| 384 | |
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| 385 | |
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| 386 | |
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| 387 | ! calcul de l'accumulation de neige : |
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| 388 | acc(:,:)=sum(prmois,dim=3,mask=Tmois < psolid) |
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| 389 | acc(:,:)=acc(:,:)*1000./ro ! conversion en glace |
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| 390 | !$OMP END WORKSHARE |
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| 391 | !$OMP END PARALLEL |
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| 392 | !debug |
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| 393 | !print*,'Tann, Tjuly',Tann(142,14),Tjuly(142,14) |
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| 394 | !print*,'acc',acc(142,14) |
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| 395 | |
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| 396 | end subroutine forclim |
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| 397 | |
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| 398 | end module climat_forcage_mod |
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