| 1 | SUBROUTINE surfini(ngrid,nq,qsurf,albedo,albedo_bareground,& |
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| 2 | albedo_snow_SPECTV,albedo_n2_ice_SPECTV) |
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| 3 | |
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| 4 | USE surfdat_h, only: albedodat |
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| 5 | USE tracer_h, only: igcm_haze |
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| 6 | use planetwide_mod, only: planetwide_maxval, planetwide_minval |
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| 7 | use radinc_h, only : L_NSPECTV |
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| 8 | use callkeys_mod, only : albedosnow, albedon2ice |
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| 9 | |
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| 10 | IMPLICIT NONE |
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| 11 | |
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| 12 | |
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| 13 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 14 | !!!!!!! !!!!!!! |
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| 15 | !!!!!!! Spectral Albedo Initialisation - Routine modified by MT2015. !!!!!!! |
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| 16 | !!!!!!! !!!!!!! |
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| 17 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 18 | |
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| 19 | |
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| 20 | !-------------------- |
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| 21 | ! Declarations: |
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| 22 | !-------------------- |
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| 23 | |
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| 24 | INTEGER,INTENT(IN) :: ngrid |
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| 25 | INTEGER,INTENT(IN) :: nq |
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| 26 | REAL,INTENT(OUT) :: albedo(ngrid,L_NSPECTV) |
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| 27 | REAL,INTENT(OUT) :: albedo_bareground(ngrid) |
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| 28 | REAL,INTENT(OUT) :: albedo_snow_SPECTV(L_NSPECTV) |
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| 29 | REAL,INTENT(OUT) :: albedo_n2_ice_SPECTV(L_NSPECTV) |
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| 30 | REAL,INTENT(IN) :: qsurf(ngrid,nq) ! tracer on surface (kg/m2) |
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| 31 | |
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| 32 | INTEGER :: ig,nw |
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| 33 | REAL :: min_albedo,max_albedo |
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| 34 | |
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| 35 | !======================================================================= |
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| 36 | |
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| 37 | ! Step 1 : Initialisation of the Spectral Albedos. |
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| 38 | DO nw=1,L_NSPECTV |
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| 39 | albedo_snow_SPECTV(nw)=albedosnow |
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| 40 | albedo_n2_ice_SPECTV(nw)=albedon2ice |
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| 41 | ENDDO |
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| 42 | |
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| 43 | |
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| 44 | ! Step 2 : We get the bare ground albedo from the start files. |
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| 45 | DO ig=1,ngrid |
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| 46 | albedo_bareground(ig)=0.7 ! albedodat(ig) |
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| 47 | DO nw=1,L_NSPECTV |
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| 48 | albedo(ig,nw)=0.7 !albedo_bareground(ig) |
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| 49 | ENDDO |
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| 50 | ENDDO |
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| 51 | call planetwide_minval(albedo_bareground,min_albedo) |
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| 52 | call planetwide_maxval(albedo_bareground,max_albedo) |
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| 53 | write(*,*) 'surfini: minimum bare ground albedo',min_albedo |
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| 54 | write(*,*) 'surfini: maximum bare ground albedo',max_albedo |
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| 55 | |
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| 56 | |
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| 57 | ! Step 3 : We modify the albedo considering some N2 at the surface. We dont take into account water ice (this is made in hydrol after the first timestep) ... |
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| 58 | if (igcm_haze.ne.0) then |
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| 59 | DO ig=1,ngrid |
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| 60 | IF (qsurf(ig,igcm_haze) .GT. 1.) THEN ! This was changed by MT2015. Condition for ~1mm of N2 ice deposit. |
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| 61 | DO nw=1,L_NSPECTV |
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| 62 | albedo(ig,nw)=albedo_n2_ice_SPECTV(nw) |
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| 63 | ENDDO |
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| 64 | END IF |
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| 65 | ENDDO |
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| 66 | else |
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| 67 | write(*,*) "surfini: No N2 ice tracer on surface ..." |
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| 68 | write(*,*) " and therefore no albedo change." |
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| 69 | endif |
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| 70 | call planetwide_minval(albedo,min_albedo) |
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| 71 | call planetwide_maxval(albedo,max_albedo) |
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| 72 | write(*,*) 'surfini: minimum corrected initial albedo',min_albedo |
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| 73 | write(*,*) 'surfini: maximum corrected initial albedo',max_albedo |
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| 74 | |
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| 75 | |
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| 76 | END |
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