| 1 | subroutine evap(ngrid,nlayer,nq,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 | USE tracer_h |
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| 6 | |
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| 7 | implicit none |
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| 8 | |
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| 9 | !================================================================== |
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| 10 | ! |
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| 11 | ! Purpose |
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| 12 | ! ------- |
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| 13 | ! Evaporation of all water in the atmopshere. |
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| 14 | ! |
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| 15 | ! Authors |
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| 16 | ! ------- |
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| 17 | ! Adapted from the LMDTERRE code by B. Charnay (2010) |
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| 18 | ! Original author Z. X. Li (1993) |
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| 19 | ! |
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| 20 | !================================================================== |
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| 21 | |
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| 22 | INTEGER ngrid,nlayer,nq |
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| 23 | |
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| 24 | ! Arguments: |
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| 25 | REAL pt(ngrid,nlayer) |
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| 26 | REAL pq(ngrid,nlayer,nq) |
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| 27 | REAL pdt(ngrid,nlayer) |
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| 28 | REAL pdq(ngrid,nlayer,nq) |
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| 29 | REAL dqevap(ngrid,nlayer) |
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| 30 | REAL dtevap(ngrid,nlayer) |
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| 31 | REAL qevap(ngrid,nlayer,nq) |
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| 32 | REAL dtime |
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| 33 | |
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| 34 | ! Local: |
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| 35 | REAL tevap(ngrid,nlayer) |
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| 36 | REAL zlvdcp |
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| 37 | REAL zlsdcp |
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| 38 | REAL zdelta |
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| 39 | INTEGER l,ig |
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| 40 | |
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| 41 | ! |
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| 42 | ! Re-evaporer l'eau liquide nuageuse |
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| 43 | ! |
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| 44 | |
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| 45 | DO l=1,nlayer |
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| 46 | DO ig=1,ngrid |
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| 47 | qevap(ig,l,igcm_h2o_vap)=pq(ig,l,igcm_h2o_vap) |
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| 48 | s +pdq(ig,l,igcm_h2o_vap)*dtime |
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| 49 | qevap(ig,l,igcm_h2o_ice)=pq(ig,l,igcm_h2o_ice) |
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| 50 | s +pdq(ig,l,igcm_h2o_ice)*dtime |
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| 51 | tevap(ig,l)=pt(ig,l)+pdt(ig,l)*dtime |
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| 52 | ENDDO |
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| 53 | ENDDO |
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| 54 | |
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| 55 | DO l = 1, nlayer |
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| 56 | DO ig = 1, ngrid |
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| 57 | zlvdcp=RLVTT/RCPD!/(1.0+RVTMP2*qevap(ig,l,igcm_h2o_vap)) |
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| 58 | zlsdcp=RLSTT/RCPD!/(1.0+RVTMP2*qevap(ig,l,igcm_h2o_vap)) |
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| 59 | ! ignoring qevap term creates huge difference when qevap large!!! |
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| 60 | |
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| 61 | zdelta = MAX(0.,SIGN(1.,T_h2O_ice_liq-tevap(ig,l))) ! what is this? |
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| 62 | ! for division between water / liquid |
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| 63 | dqevap(ig,l) = MAX(0.0,qevap(ig,l,igcm_h2o_ice))/dtime |
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| 64 | dtevap(ig,l) = - dqevap(ig,l)*RLVTT/RCPD ! exactly as in largescale.F |
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| 65 | ! dtevap(ig,l) = - dqevap(ig,l) |
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| 66 | ! s * (zlvdcp*(1.-zdelta)+zlsdcp*zdelta) |
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| 67 | qevap(ig,l,igcm_h2o_vap) = qevap(ig,l,igcm_h2o_vap) |
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| 68 | s +dqevap(ig,l)*dtime |
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| 69 | qevap(ig,l,igcm_h2o_ice) = 0.0 |
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| 70 | tevap(ig,l) = tevap(ig,l)+dtevap(ig,l)*dtime |
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| 71 | |
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| 72 | ENDDO |
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| 73 | ENDDO |
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| 74 | |
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| 75 | END |
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