| 1 | subroutine simpleclouds(ngrid,nlay,ptimestep, |
|---|
| 2 | & pplay,pzlay,pt,pdt, |
|---|
| 3 | & pq,pdq,pdqcloud,pdtcloud, |
|---|
| 4 | & nq,tau,rice) |
|---|
| 5 | USE updaterad |
|---|
| 6 | USE watersat_mod, ONLY: watersat |
|---|
| 7 | use tracer_mod, only: igcm_h2o_vap, igcm_h2o_ice, |
|---|
| 8 | & igcm_hdo_vap, igcm_hdo_ice, |
|---|
| 9 | & qperemin |
|---|
| 10 | USE comcstfi_h |
|---|
| 11 | use dimradmars_mod, only: naerkind |
|---|
| 12 | |
|---|
| 13 | implicit none |
|---|
| 14 | c------------------------------------------------------------------ |
|---|
| 15 | c This routine is used to form clouds when a parcel of the GCM is |
|---|
| 16 | c saturated. It is a simplified scheme, and there is almost no |
|---|
| 17 | c microphysics involved. When the air is saturated, water-ice |
|---|
| 18 | c clouds form on a fraction of the dust particles, specified by |
|---|
| 19 | c the constant called "ccn_factor". There is no supersaturation, |
|---|
| 20 | c and no nucleation rates computed. A more accurate scheme can |
|---|
| 21 | c be found in the routine called "improvedclouds.F". |
|---|
| 22 | |
|---|
| 23 | c Modif de zq si saturation dans l'atmosphere |
|---|
| 24 | c si zq(ig,l)> zqsat(ig,l) -> zq(ig,l)=zqsat(ig,l) |
|---|
| 25 | c Le test est effectue de bas en haut. L'eau condensee |
|---|
| 26 | c (si saturation) est remise dans la couche en dessous. |
|---|
| 27 | c L'eau condensee dans la couche du bas est deposee a la surface |
|---|
| 28 | |
|---|
| 29 | c Authors: Franck Montmessin (water ice scheme) |
|---|
| 30 | c Francois Forget (changed nuclei density & outputs) |
|---|
| 31 | c Ehouarn Millour (sept.2008, tracers are now handled |
|---|
| 32 | c by name and not fixed index) |
|---|
| 33 | c J.-B. Madeleine (developed a single routine called |
|---|
| 34 | c simpleclouds.F, and corrected calculations |
|---|
| 35 | c of the typical CCN profile, Oct. 2011) |
|---|
| 36 | c------------------------------------------------------------------ |
|---|
| 37 | #include "callkeys.h" |
|---|
| 38 | |
|---|
| 39 | c------------------------------------------------------------------ |
|---|
| 40 | c Arguments: |
|---|
| 41 | c --------- |
|---|
| 42 | c Inputs: |
|---|
| 43 | INTEGER ngrid,nlay |
|---|
| 44 | integer nq ! nombre de traceurs |
|---|
| 45 | REAL ptimestep ! pas de temps physique (s) |
|---|
| 46 | REAL pplay(ngrid,nlay) ! pression au milieu des couches (Pa) |
|---|
| 47 | REAL pzlay(ngrid,nlay) ! altitude at the middle of the layers |
|---|
| 48 | REAL pt(ngrid,nlay) ! temperature at the middle of the |
|---|
| 49 | ! layers (K) |
|---|
| 50 | REAL pdt(ngrid,nlay) ! tendance temperature des autres |
|---|
| 51 | ! param. |
|---|
| 52 | real pq(ngrid,nlay,nq) ! traceur (kg/kg) |
|---|
| 53 | real pdq(ngrid,nlay,nq) ! tendance avant condensation |
|---|
| 54 | ! (kg/kg.s-1) |
|---|
| 55 | REAL tau(ngrid,naerkind) ! Column dust optical depth at each point |
|---|
| 56 | |
|---|
| 57 | c Output: |
|---|
| 58 | REAL rice(ngrid,nlay) ! Ice mass mean radius (m) |
|---|
| 59 | ! (r_c in montmessin_2004) |
|---|
| 60 | real pdqcloud(ngrid,nlay,nq) ! tendance de la condensation |
|---|
| 61 | ! H2O(kg/kg.s-1) |
|---|
| 62 | REAL pdtcloud(ngrid,nlay) ! tendance temperature due |
|---|
| 63 | ! a la chaleur latente |
|---|
| 64 | |
|---|
| 65 | c------------------------------------------------------------------ |
|---|
| 66 | c Local variables: |
|---|
| 67 | |
|---|
| 68 | REAL rhocloud(ngrid,nlay) ! Cloud density (kg.m-3) |
|---|
| 69 | |
|---|
| 70 | INTEGER ig,l |
|---|
| 71 | |
|---|
| 72 | REAL zq(ngrid,nlay,nq) ! local value of tracers |
|---|
| 73 | REAL zq0(ngrid,nlay,nq) ! local initial value of tracers |
|---|
| 74 | REAL zt(ngrid,nlay) ! local value of temperature |
|---|
| 75 | REAL zqsat(ngrid,nlay) ! saturation |
|---|
| 76 | REAL*8 dzq ! masse de glace echangee (kg/kg) |
|---|
| 77 | REAL lw !Latent heat of sublimation (J.kg-1) |
|---|
| 78 | REAL,PARAMETER :: To=273.15 ! reference temperature, T=273.15 K |
|---|
| 79 | real rdusttyp(ngrid,nlay) ! Typical dust geom. mean radius (m) |
|---|
| 80 | REAL ccntyp(ngrid,nlay) |
|---|
| 81 | ! Typical dust number density (#/kg) |
|---|
| 82 | REAL alpha_c(ngrid,nlay) !!MARGAUX: alpha_c as a spatial variable |
|---|
| 83 | |
|---|
| 84 | c CCN reduction factor |
|---|
| 85 | c REAL, PARAMETER :: ccn_factor = 4.5 !! comme TESTS_JB // 1. avant |
|---|
| 86 | REAL DoH_vap(ngrid,nlay) |
|---|
| 87 | REAL DoH_ice(ngrid,nlay) |
|---|
| 88 | c----------------------------------------------------------------------- |
|---|
| 89 | c 1. initialisation |
|---|
| 90 | c ----------------- |
|---|
| 91 | |
|---|
| 92 | c On "update" la valeur de q(nq) (water vapor) et temperature. |
|---|
| 93 | c On effectue qqes calculs preliminaires sur les couches : |
|---|
| 94 | |
|---|
| 95 | do l=1,nlay |
|---|
| 96 | do ig=1,ngrid |
|---|
| 97 | zq(ig,l,igcm_h2o_vap)= |
|---|
| 98 | & pq(ig,l,igcm_h2o_vap)+pdq(ig,l,igcm_h2o_vap)*ptimestep |
|---|
| 99 | zq(ig,l,igcm_h2o_vap)=max(zq(ig,l,igcm_h2o_vap),1.E-30) ! FF 12/2004 |
|---|
| 100 | zq0(ig,l,igcm_h2o_vap)=zq(ig,l,igcm_h2o_vap) |
|---|
| 101 | zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep |
|---|
| 102 | |
|---|
| 103 | zq(ig,l,igcm_h2o_ice)= |
|---|
| 104 | & pq(ig,l,igcm_h2o_ice)+pdq(ig,l,igcm_h2o_ice)*ptimestep |
|---|
| 105 | zq(ig,l,igcm_h2o_ice)=max(zq(ig,l,igcm_h2o_ice),0.) ! FF 12/2004 |
|---|
| 106 | zq0(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice) |
|---|
| 107 | |
|---|
| 108 | if (hdo) then |
|---|
| 109 | zq(ig,l,igcm_hdo_vap)= |
|---|
| 110 | & pq(ig,l,igcm_hdo_vap)+pdq(ig,l,igcm_hdo_vap)*ptimestep |
|---|
| 111 | zq(ig,l,igcm_hdo_vap)=max(zq(ig,l,igcm_hdo_vap),1e-30) ! FF 12/2004 |
|---|
| 112 | zq0(ig,l,igcm_hdo_vap)=zq(ig,l,igcm_hdo_vap) |
|---|
| 113 | |
|---|
| 114 | zq(ig,l,igcm_hdo_ice)= |
|---|
| 115 | & pq(ig,l,igcm_hdo_ice)+pdq(ig,l,igcm_hdo_ice)*ptimestep |
|---|
| 116 | zq(ig,l,igcm_hdo_ice)=max(zq(ig,l,igcm_hdo_ice),1e-30) ! FF 12/2004 |
|---|
| 117 | zq0(ig,l,igcm_hdo_ice)=zq(ig,l,igcm_hdo_ice) |
|---|
| 118 | |
|---|
| 119 | endif !hdo |
|---|
| 120 | enddo |
|---|
| 121 | enddo |
|---|
| 122 | |
|---|
| 123 | pdqcloud(1:ngrid,1:nlay,1:nq)=0 |
|---|
| 124 | pdtcloud(1:ngrid,1:nlay)=0 |
|---|
| 125 | |
|---|
| 126 | alpha_c(1:ngrid,1:nlay)=0. |
|---|
| 127 | |
|---|
| 128 | c ---------------------------------------------- |
|---|
| 129 | c |
|---|
| 130 | c Rapport de melange a saturation dans la couche l : ------- |
|---|
| 131 | c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|---|
| 132 | |
|---|
| 133 | call watersat(ngrid*nlay,zt,pplay,zqsat) |
|---|
| 134 | |
|---|
| 135 | c taux de condensation (kg/kg/s-1) dans les differentes couches |
|---|
| 136 | c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|---|
| 137 | |
|---|
| 138 | do l=1,nlay |
|---|
| 139 | do ig=1,ngrid |
|---|
| 140 | |
|---|
| 141 | if (zq(ig,l,igcm_h2o_vap).ge.zqsat(ig,l))then ! Condensation |
|---|
| 142 | dzq=zq(ig,l,igcm_h2o_vap)-zqsat(ig,l) |
|---|
| 143 | |
|---|
| 144 | elseif(zq(ig,l,igcm_h2o_vap).lt.zqsat(ig,l))then ! Sublimation |
|---|
| 145 | dzq=-min(zqsat(ig,l)-zq(ig,l,igcm_h2o_vap), |
|---|
| 146 | & zq(ig,l,igcm_h2o_ice)) |
|---|
| 147 | endif |
|---|
| 148 | |
|---|
| 149 | c Water Mass change |
|---|
| 150 | c ~~~~~~~~~~~~~~~~~ |
|---|
| 151 | zq(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice)+dzq |
|---|
| 152 | zq(ig,l,igcm_h2o_vap)=zq(ig,l,igcm_h2o_vap)-dzq |
|---|
| 153 | |
|---|
| 154 | enddo ! of do ig=1,ngrid |
|---|
| 155 | enddo ! of do l=1,nlay |
|---|
| 156 | |
|---|
| 157 | |
|---|
| 158 | c Tendance finale |
|---|
| 159 | c ~~~~~~~~~~~~~~~ |
|---|
| 160 | do l=1, nlay |
|---|
| 161 | do ig=1,ngrid |
|---|
| 162 | pdqcloud(ig,l,igcm_h2o_vap)=(zq(ig,l,igcm_h2o_vap) |
|---|
| 163 | & -zq0(ig,l,igcm_h2o_vap))/ptimestep |
|---|
| 164 | pdqcloud(ig,l,igcm_h2o_ice) = |
|---|
| 165 | & (zq(ig,l,igcm_h2o_ice) - zq0(ig,l,igcm_h2o_ice))/ptimestep |
|---|
| 166 | |
|---|
| 167 | lw=(2834.3-0.28*(zt(ig,l)-To)-0.004*(zt(ig,l)-To)**2)*1.e+3 |
|---|
| 168 | pdtcloud(ig,l)=-pdqcloud(ig,l,igcm_h2o_vap)*lw/cpp |
|---|
| 169 | |
|---|
| 170 | if (hdo) then |
|---|
| 171 | if (pdqcloud(ig,l,igcm_h2o_ice).gt.0.0) then !condens |
|---|
| 172 | |
|---|
| 173 | if (hdofrac) then ! do we use fractionation? |
|---|
| 174 | c alpha_c(ig,l) = exp(16288./zt(ig,l)**2.-9.34d-2) |
|---|
| 175 | alpha_c(ig,l) = exp(13525./zt(ig,l)**2.-5.59d-2) !Lamb |
|---|
| 176 | else |
|---|
| 177 | alpha_c(ig,l) = 1.d0 |
|---|
| 178 | endif |
|---|
| 179 | |
|---|
| 180 | if (zq0(ig,l,igcm_h2o_vap).gt.qperemin) then |
|---|
| 181 | pdqcloud(ig,l,igcm_hdo_ice)= |
|---|
| 182 | & pdqcloud(ig,l,igcm_h2o_ice)*alpha_c(ig,l)* |
|---|
| 183 | & ( zq0(ig,l,igcm_hdo_vap) |
|---|
| 184 | & /zq0(ig,l,igcm_h2o_vap) ) |
|---|
| 185 | else |
|---|
| 186 | pdqcloud(ig,l,igcm_hdo_ice)= 0.0 |
|---|
| 187 | endif |
|---|
| 188 | |
|---|
| 189 | pdqcloud(ig,l,igcm_hdo_ice) = |
|---|
| 190 | & min(pdqcloud(ig,l,igcm_hdo_ice), |
|---|
| 191 | & zq0(ig,l,igcm_hdo_vap)/ptimestep) |
|---|
| 192 | |
|---|
| 193 | pdqcloud(ig,l,igcm_hdo_vap)= |
|---|
| 194 | & -pdqcloud(ig,l,igcm_hdo_ice) |
|---|
| 195 | |
|---|
| 196 | else ! sublimation |
|---|
| 197 | |
|---|
| 198 | if (zq0(ig,l,igcm_h2o_ice).gt.qperemin) then |
|---|
| 199 | pdqcloud(ig,l,igcm_hdo_ice)= |
|---|
| 200 | & pdqcloud(ig,l,igcm_h2o_ice)* |
|---|
| 201 | & ( zq0(ig,l,igcm_hdo_ice) |
|---|
| 202 | & /zq0(ig,l,igcm_h2o_ice) ) |
|---|
| 203 | else |
|---|
| 204 | pdqcloud(ig,l,igcm_hdo_ice)= 0. |
|---|
| 205 | endif |
|---|
| 206 | |
|---|
| 207 | pdqcloud(ig,l,igcm_hdo_ice) = |
|---|
| 208 | & max(pdqcloud(ig,l,igcm_hdo_ice), |
|---|
| 209 | & -zq0(ig,l,igcm_hdo_ice)/ptimestep) |
|---|
| 210 | |
|---|
| 211 | pdqcloud(ig,l,igcm_hdo_vap)= |
|---|
| 212 | & -pdqcloud(ig,l,igcm_hdo_ice) |
|---|
| 213 | |
|---|
| 214 | endif ! condensation/sublimation |
|---|
| 215 | |
|---|
| 216 | endif ! hdo |
|---|
| 217 | |
|---|
| 218 | enddo ! of do ig=1,ngrid |
|---|
| 219 | enddo ! of do l=1,nlay |
|---|
| 220 | |
|---|
| 221 | c ice crystal radius |
|---|
| 222 | do l=1, nlay |
|---|
| 223 | do ig=1,ngrid |
|---|
| 224 | call updaterice_typ(zq(ig,l,igcm_h2o_ice), |
|---|
| 225 | & tau(ig,1),pzlay(ig,l),rice(ig,l)) |
|---|
| 226 | end do |
|---|
| 227 | end do |
|---|
| 228 | |
|---|
| 229 | c if (hdo) then |
|---|
| 230 | c CALL WRITEDIAGFI(ngrid,'alpha_c', |
|---|
| 231 | c & 'alpha_c', |
|---|
| 232 | c & ' ',3,alpha_c) |
|---|
| 233 | c endif !hdo |
|---|
| 234 | c------------------------------------------------------------------ |
|---|
| 235 | return |
|---|
| 236 | end |
|---|
