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