| 1 | ! |
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| 2 | ! $Header$ |
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| 3 | ! |
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| 4 | SUBROUTINE albsno(klon, knon, dtime, agesno, alb_neig_grid, precip_snow) |
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| 5 | |
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| 6 | IMPLICIT NONE |
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| 7 | |
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| 8 | INCLUDE "clesphys.h" |
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| 9 | |
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| 10 | ! Input arguments |
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| 11 | !**************************************************************************************** |
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| 12 | INTEGER, INTENT(IN) :: klon, knon |
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| 13 | REAL, INTENT(IN) :: dtime |
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| 14 | REAL, DIMENSION(klon), INTENT(IN) :: precip_snow |
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| 15 | |
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| 16 | ! In/Output arguments |
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| 17 | !**************************************************************************************** |
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| 18 | REAL, DIMENSION(klon), INTENT(INOUT) :: agesno |
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| 19 | |
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| 20 | ! Output arguments |
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| 21 | !**************************************************************************************** |
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| 22 | REAL, DIMENSION(klon), INTENT(OUT) :: alb_neig_grid |
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| 23 | |
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| 24 | ! Local variables |
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| 25 | !**************************************************************************************** |
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| 26 | INTEGER :: i, nv |
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| 27 | INTEGER, PARAMETER :: nvm = 8 |
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| 28 | REAL :: as |
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| 29 | REAL, DIMENSION(klon,nvm) :: veget |
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| 30 | REAL, DIMENSION(nvm),SAVE :: init, decay |
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| 31 | !$OMP THREADPRIVATE(init, decay) |
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| 32 | |
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| 33 | DATA init /0.55, 0.14, 0.18, 0.29, 0.15, 0.15, 0.14, 0./ |
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| 34 | DATA decay/0.30, 0.67, 0.63, 0.45, 0.40, 0.14, 0.06, 1./ |
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| 35 | !**************************************************************************************** |
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| 36 | |
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| 37 | if (albsno0>=0.) then |
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| 38 | init(:)=albsno0 |
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| 39 | decay(:)=0. |
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| 40 | endif |
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| 41 | |
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| 42 | veget = 0. |
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| 43 | veget(:,1) = 1. ! desert partout |
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| 44 | DO i = 1, knon |
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| 45 | alb_neig_grid(i) = 0.0 |
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| 46 | ENDDO |
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| 47 | DO nv = 1, nvm |
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| 48 | DO i = 1, knon |
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| 49 | as = init(nv)+decay(nv)*EXP(-agesno(i)/5.) |
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| 50 | alb_neig_grid(i) = alb_neig_grid(i) + veget(i,nv)*as |
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| 51 | ENDDO |
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| 52 | ENDDO |
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| 53 | |
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| 54 | |
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| 55 | ! modilation en fonction de l'age de la neige |
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| 56 | DO i = 1, knon |
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| 57 | agesno(i) = (agesno(i) + (1.-agesno(i)/50.)*dtime/86400.)& |
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| 58 | & * EXP(-1.*MAX(0.0,precip_snow(i))*dtime/0.3) |
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| 59 | agesno(i) = MAX(agesno(i),0.0) |
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| 60 | ENDDO |
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| 61 | |
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| 62 | END SUBROUTINE albsno |
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