| 1 | subroutine evap(dtime,pt, pq, pdq, pdt, |
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| 2 | $ dqevap,dtevap, qevap, tevap) |
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| 3 | |
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| 4 | use watercommon_h |
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| 5 | |
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| 6 | implicit none |
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| 7 | |
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| 8 | #include "dimensions.h" |
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| 9 | #include "dimphys.h" |
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| 10 | #include "tracer.h" |
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| 11 | #include "comcstfi.h" |
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| 12 | |
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| 13 | !================================================================== |
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| 14 | ! |
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| 15 | ! Purpose |
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| 16 | ! ------- |
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| 17 | ! Evaporation of all water in the atmopshere. |
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| 18 | ! |
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| 19 | ! Authors |
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| 20 | ! ------- |
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| 21 | ! Adapted from the LMDTERRE code by B. Charnay (2010) |
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| 22 | ! Original author Z. X. Li (1993) |
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| 23 | ! |
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| 24 | !================================================================== |
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| 25 | |
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| 26 | ! Arguments: |
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| 27 | REAL pt(ngridmx,nlayermx) |
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| 28 | REAL pq(ngridmx,nlayermx,nqmx) |
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| 29 | REAL pdt(ngridmx,nlayermx) |
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| 30 | REAL pdq(ngridmx,nlayermx,nqmx) |
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| 31 | REAL dqevap(ngridmx,nlayermx) |
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| 32 | REAL dtevap(ngridmx,nlayermx) |
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| 33 | REAL qevap(ngridmx,nlayermx,nqmx) |
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| 34 | REAL dtime |
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| 35 | |
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| 36 | ! Local: |
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| 37 | REAL tevap(ngridmx,nlayermx) |
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| 38 | REAL zlvdcp |
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| 39 | REAL zlsdcp |
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| 40 | REAL zdelta |
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| 41 | INTEGER l,ig |
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| 42 | |
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| 43 | ! |
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| 44 | ! Re-evaporer l'eau liquide nuageuse |
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| 45 | ! |
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| 46 | |
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| 47 | DO l=1,nlayermx |
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| 48 | DO ig=1,ngridmx |
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| 49 | qevap(ig,l,igcm_h2o_vap)=pq(ig,l,igcm_h2o_vap) |
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| 50 | s +pdq(ig,l,igcm_h2o_vap)*dtime |
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| 51 | qevap(ig,l,igcm_h2o_ice)=pq(ig,l,igcm_h2o_ice) |
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| 52 | s +pdq(ig,l,igcm_h2o_ice)*dtime |
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| 53 | tevap(ig,l)=pt(ig,l)+pdt(ig,l)*dtime |
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| 54 | ENDDO |
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| 55 | ENDDO |
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| 56 | |
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| 57 | DO l = 1, nlayermx |
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| 58 | DO ig = 1, ngridmx |
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| 59 | zlvdcp=RLVTT/RCPD!/(1.0+RVTMP2*qevap(ig,l,igcm_h2o_vap)) |
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| 60 | zlsdcp=RLSTT/RCPD!/(1.0+RVTMP2*qevap(ig,l,igcm_h2o_vap)) |
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| 61 | ! ignoring qevap term creates huge difference when qevap large!!! |
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| 62 | |
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| 63 | zdelta = MAX(0.,SIGN(1.,To-tevap(ig,l))) ! what is this? |
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| 64 | ! for division between water / liquid |
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| 65 | dqevap(ig,l) = MAX(0.0,qevap(ig,l,igcm_h2o_ice))/dtime |
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| 66 | dtevap(ig,l) = - dqevap(ig,l)*RLVTT/RCPD ! exactly as in largescale.F |
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| 67 | ! dtevap(ig,l) = - dqevap(ig,l) |
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| 68 | ! s * (zlvdcp*(1.-zdelta)+zlsdcp*zdelta) |
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| 69 | qevap(ig,l,igcm_h2o_vap) = qevap(ig,l,igcm_h2o_vap) |
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| 70 | s +dqevap(ig,l)*dtime |
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| 71 | qevap(ig,l,igcm_h2o_ice) = 0.0 |
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| 72 | tevap(ig,l) = tevap(ig,l)+dtevap(ig,l)*dtime |
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| 73 | |
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| 74 | ENDDO |
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| 75 | ENDDO |
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| 76 | |
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| 77 | RETURN |
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| 78 | END |
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