| 1 | subroutine hydrol(ngrid,nq,ptimestep,rnat,tsurf, & |
|---|
| 2 | qsurf,dqsurf,dqs_hyd,pcapcal, & |
|---|
| 3 | albedo0,albedo,mu0,pdtsurf,pdtsurf_hyd,hice, & |
|---|
| 4 | pctsrf_sic,sea_ice) |
|---|
| 5 | |
|---|
| 6 | use ioipsl_getincom |
|---|
| 7 | use watercommon_h, only: T_h2O_ice_liq, RLFTT, rhowater, mx_eau_sol |
|---|
| 8 | USE surfdat_h |
|---|
| 9 | use comdiurn_h |
|---|
| 10 | USE comgeomfi_h |
|---|
| 11 | USE tracer_h |
|---|
| 12 | use slab_ice_h |
|---|
| 13 | |
|---|
| 14 | implicit none |
|---|
| 15 | |
|---|
| 16 | !================================================================== |
|---|
| 17 | ! |
|---|
| 18 | ! Purpose |
|---|
| 19 | ! ------- |
|---|
| 20 | ! Calculate the surface hydrology and albedo changes. |
|---|
| 21 | ! |
|---|
| 22 | ! Authors |
|---|
| 23 | ! ------- |
|---|
| 24 | ! Adapted from LMDTERRE by B. Charnay (2010). Further |
|---|
| 25 | ! modifications by R. Wordsworth (2010). |
|---|
| 26 | ! |
|---|
| 27 | ! Called by |
|---|
| 28 | ! --------- |
|---|
| 29 | ! physiq.F |
|---|
| 30 | ! |
|---|
| 31 | ! Calls |
|---|
| 32 | ! ----- |
|---|
| 33 | ! none |
|---|
| 34 | ! |
|---|
| 35 | ! Notes |
|---|
| 36 | ! ----- |
|---|
| 37 | ! rnat is terrain type: 0-ocean; 1-continent |
|---|
| 38 | ! |
|---|
| 39 | !================================================================== |
|---|
| 40 | |
|---|
| 41 | #include "dimensions.h" |
|---|
| 42 | #include "dimphys.h" |
|---|
| 43 | #include "comcstfi.h" |
|---|
| 44 | #include "callkeys.h" |
|---|
| 45 | |
|---|
| 46 | integer ngrid,nq |
|---|
| 47 | |
|---|
| 48 | ! Inputs |
|---|
| 49 | ! ------ |
|---|
| 50 | real albedoice |
|---|
| 51 | save albedoice |
|---|
| 52 | |
|---|
| 53 | real snowlayer |
|---|
| 54 | parameter (snowlayer=33.0) ! 33 kg/m^2 of snow, equal to a layer of 3.3 cm |
|---|
| 55 | real oceantime |
|---|
| 56 | parameter (oceantime=10*24*3600) |
|---|
| 57 | |
|---|
| 58 | logical,save :: oceanbulkavg ! relax ocean temperatures to a GLOBAL mean value? |
|---|
| 59 | logical,save :: activerunoff ! enable simple runoff scheme? |
|---|
| 60 | logical,save :: oceanalbvary ! ocean albedo varies with the diurnal cycle? |
|---|
| 61 | |
|---|
| 62 | ! Arguments |
|---|
| 63 | ! --------- |
|---|
| 64 | real rnat(ngrid) ! I changed this to integer (RW) |
|---|
| 65 | real,dimension(:),allocatable,save :: runoff |
|---|
| 66 | real totalrunoff, tsea, oceanarea |
|---|
| 67 | save oceanarea |
|---|
| 68 | |
|---|
| 69 | real ptimestep |
|---|
| 70 | real mu0(ngrid) |
|---|
| 71 | real qsurf(ngrid,nq), tsurf(ngrid) |
|---|
| 72 | real dqsurf(ngrid,nq), pdtsurf(ngrid) |
|---|
| 73 | real hice(ngrid) |
|---|
| 74 | real albedo0(ngrid), albedo(ngrid) |
|---|
| 75 | real pctsrf_sic(ngrid), sea_ice(ngrid) |
|---|
| 76 | |
|---|
| 77 | real oceanarea2 |
|---|
| 78 | |
|---|
| 79 | ! Output |
|---|
| 80 | ! ------ |
|---|
| 81 | real dqs_hyd(ngrid,nq) |
|---|
| 82 | real pdtsurf_hyd(ngrid) |
|---|
| 83 | |
|---|
| 84 | ! Local |
|---|
| 85 | ! ----- |
|---|
| 86 | real a,b,E |
|---|
| 87 | integer ig,iq, icap ! wld like to remove icap |
|---|
| 88 | real fsnoi, subli, fauxo |
|---|
| 89 | real twater(ngrid) |
|---|
| 90 | real pcapcal(ngrid) |
|---|
| 91 | real hicebis(ngrid) |
|---|
| 92 | real zqsurf(ngrid,nq) |
|---|
| 93 | real ztsurf(ngrid) |
|---|
| 94 | real albedo_sic, alb_ice |
|---|
| 95 | real zfra |
|---|
| 96 | |
|---|
| 97 | integer, save :: ivap, iliq, iice |
|---|
| 98 | |
|---|
| 99 | logical, save :: firstcall |
|---|
| 100 | |
|---|
| 101 | data firstcall /.true./ |
|---|
| 102 | |
|---|
| 103 | |
|---|
| 104 | if(firstcall)then |
|---|
| 105 | |
|---|
| 106 | oceanbulkavg=.false. |
|---|
| 107 | oceanalbvary=.false. |
|---|
| 108 | write(*,*)"Activate runnoff into oceans?" |
|---|
| 109 | activerunoff=.false. |
|---|
| 110 | call getin("activerunoff",activerunoff) |
|---|
| 111 | write(*,*)" activerunoff = ",activerunoff |
|---|
| 112 | |
|---|
| 113 | |
|---|
| 114 | |
|---|
| 115 | if (activerunoff) ALLOCATE(runoff(ngrid)) |
|---|
| 116 | |
|---|
| 117 | ivap=igcm_h2o_vap |
|---|
| 118 | iliq=igcm_h2o_vap |
|---|
| 119 | iice=igcm_h2o_ice |
|---|
| 120 | |
|---|
| 121 | write(*,*) "hydrol: ivap=",ivap |
|---|
| 122 | write(*,*) " iliq=",iliq |
|---|
| 123 | write(*,*) " iice=",iice |
|---|
| 124 | |
|---|
| 125 | ! Here's the deal: iice is used in place of igcm_h2o_ice both on the |
|---|
| 126 | ! surface and in the atmosphere. ivap is used in |
|---|
| 127 | ! place of igcm_h2o_vap ONLY in the atmosphere, while |
|---|
| 128 | ! iliq is used in place of igcm_h2o_vap ONLY on the |
|---|
| 129 | ! surface. |
|---|
| 130 | |
|---|
| 131 | ! Soon to be extended to the entire water cycle... |
|---|
| 132 | |
|---|
| 133 | ! Ice albedo = snow albedo for now |
|---|
| 134 | albedoice=albedosnow |
|---|
| 135 | |
|---|
| 136 | ! Total ocean surface area |
|---|
| 137 | oceanarea=0. |
|---|
| 138 | do ig=1,ngrid |
|---|
| 139 | if(nint(rnat(ig)).eq.0)then |
|---|
| 140 | oceanarea=oceanarea+area(ig) |
|---|
| 141 | endif |
|---|
| 142 | enddo |
|---|
| 143 | |
|---|
| 144 | if(oceanbulkavg.and.(oceanarea.le.0.))then |
|---|
| 145 | print*,'How are we supposed to average the ocean' |
|---|
| 146 | print*,'temperature, when there are no oceans?' |
|---|
| 147 | call abort |
|---|
| 148 | endif |
|---|
| 149 | |
|---|
| 150 | if(activerunoff.and.(oceanarea.le.0.))then |
|---|
| 151 | print*,'You have enabled runoff, but you have no oceans.' |
|---|
| 152 | print*,'Where did you think the water was going to go?' |
|---|
| 153 | call abort |
|---|
| 154 | endif |
|---|
| 155 | |
|---|
| 156 | firstcall = .false. |
|---|
| 157 | endif |
|---|
| 158 | |
|---|
| 159 | ! add physical tendencies already calculated |
|---|
| 160 | ! ------------------------------------------ |
|---|
| 161 | |
|---|
| 162 | do ig=1,ngrid |
|---|
| 163 | ztsurf(ig) = tsurf(ig) + ptimestep*pdtsurf(ig) |
|---|
| 164 | pdtsurf_hyd(ig)=0.0 |
|---|
| 165 | do iq=1,nq |
|---|
| 166 | zqsurf(ig,iq) = qsurf(ig,iq) + ptimestep*dqsurf(ig,iq) |
|---|
| 167 | enddo |
|---|
| 168 | enddo |
|---|
| 169 | |
|---|
| 170 | do ig=1,ngrid |
|---|
| 171 | do iq=1,nq |
|---|
| 172 | dqs_hyd(ig,iq) = 0.0 |
|---|
| 173 | enddo |
|---|
| 174 | enddo |
|---|
| 175 | |
|---|
| 176 | do ig = 1, ngrid |
|---|
| 177 | |
|---|
| 178 | ! Ocean |
|---|
| 179 | ! ----- |
|---|
| 180 | if(nint(rnat(ig)).eq.0)then |
|---|
| 181 | |
|---|
| 182 | ! re-calculate oceanic albedo |
|---|
| 183 | ! if(diurnal.and.oceanalbvary)then |
|---|
| 184 | ! fauxo = ( 1.47 - ACOS( mu0(ig) ) )/0.15 ! where does this come from (Benjamin)? |
|---|
| 185 | ! albedo(ig) = 1.1*( .03 + .630/( 1. + fauxo*fauxo)) |
|---|
| 186 | ! albedo(ig) = MAX(MIN(albedo(ig),0.60),0.04) |
|---|
| 187 | ! else |
|---|
| 188 | albedo(ig) = alb_ocean ! modif Benjamin |
|---|
| 189 | ! end if |
|---|
| 190 | |
|---|
| 191 | |
|---|
| 192 | if(ok_slab_ocean) then |
|---|
| 193 | |
|---|
| 194 | ! Fraction neige (hauteur critique 45kg/m2~15cm) |
|---|
| 195 | zfra = MAX(0.0,MIN(1.0,zqsurf(ig,iice)/45.0)) |
|---|
| 196 | ! Albedo glace |
|---|
| 197 | alb_ice=alb_ice_max-(alb_ice_max-alb_ice_min) & |
|---|
| 198 | *exp(-sea_ice(ig)/h_alb_ice) |
|---|
| 199 | ! Albedo glace+neige |
|---|
| 200 | albedo_sic= albedosnow*zfra + alb_ice*(1.0-zfra) |
|---|
| 201 | |
|---|
| 202 | ! Albedo final |
|---|
| 203 | albedo(ig) = pctsrf_sic(ig)*albedo_sic + (1.-pctsrf_sic(ig))*alb_ocean |
|---|
| 204 | ! oceanic ice height, just for diagnostics |
|---|
| 205 | hice(ig) = MIN(10.,sea_ice(ig)/rhowater) |
|---|
| 206 | else !ok_slab_ocean |
|---|
| 207 | |
|---|
| 208 | |
|---|
| 209 | ! calculate oceanic ice height including the latent heat of ice formation |
|---|
| 210 | ! hice is the height of oceanic ice with a maximum of maxicethick. |
|---|
| 211 | hice(ig) = zqsurf(ig,iice)/rhowater ! update hice to include recent snowfall |
|---|
| 212 | |
|---|
| 213 | ! twater(ig) = tsurf(ig) + ptimestep*zdtsurf(ig) & |
|---|
| 214 | twater(ig) = ztsurf(ig) - hice(ig)*RLFTT*rhowater/pcapcal(ig) |
|---|
| 215 | ! this is temperature water would have if we melted entire ocean ice layer |
|---|
| 216 | hicebis(ig) = hice(ig) |
|---|
| 217 | hice(ig) = 0. |
|---|
| 218 | |
|---|
| 219 | if(twater(ig) .lt. T_h2O_ice_liq)then |
|---|
| 220 | E=min((T_h2O_ice_liq+Tsaldiff-twater(ig))*pcapcal(ig),RLFTT*rhowater*maxicethick) |
|---|
| 221 | hice(ig) = E/(RLFTT*rhowater) |
|---|
| 222 | hice(ig) = max(hice(ig),0.0) |
|---|
| 223 | hice(ig) = min(hice(ig),maxicethick) |
|---|
| 224 | pdtsurf_hyd(ig) = (hice(ig) - hicebis(ig))*RLFTT*rhowater/pcapcal(ig)/ptimestep |
|---|
| 225 | albedo(ig) = albedoice |
|---|
| 226 | |
|---|
| 227 | ! if (zqsurf(ig,iice).ge.snowlayer) then |
|---|
| 228 | ! albedo(ig) = albedoice |
|---|
| 229 | ! else |
|---|
| 230 | ! albedo(ig) = albedoocean & |
|---|
| 231 | ! + (albedosnow - albedoocean)*zqsurf(ig,iice)/snowlayer |
|---|
| 232 | ! endif |
|---|
| 233 | |
|---|
| 234 | else |
|---|
| 235 | |
|---|
| 236 | pdtsurf_hyd(ig) = -hicebis(ig)*RLFTT*rhowater/pcapcal(ig)/ptimestep |
|---|
| 237 | albedo(ig) = alb_ocean |
|---|
| 238 | |
|---|
| 239 | endif |
|---|
| 240 | |
|---|
| 241 | zqsurf(ig,iliq) = zqsurf(ig,iliq)-(hice(ig)*rhowater-zqsurf(ig,iice)) |
|---|
| 242 | zqsurf(ig,iice) = hice(ig)*rhowater |
|---|
| 243 | |
|---|
| 244 | endif!(ok_slab_ocean) |
|---|
| 245 | |
|---|
| 246 | |
|---|
| 247 | ! Continent |
|---|
| 248 | ! --------- |
|---|
| 249 | elseif (nint(rnat(ig)).eq.1) then |
|---|
| 250 | |
|---|
| 251 | ! melt the snow |
|---|
| 252 | if(ztsurf(ig).gt.T_h2O_ice_liq)then |
|---|
| 253 | if(zqsurf(ig,iice).gt.1.0e-8)then |
|---|
| 254 | |
|---|
| 255 | a = (ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT |
|---|
| 256 | b = zqsurf(ig,iice) |
|---|
| 257 | fsnoi = min(a,b) |
|---|
| 258 | |
|---|
| 259 | zqsurf(ig,iice) = zqsurf(ig,iice) - fsnoi |
|---|
| 260 | zqsurf(ig,iliq) = zqsurf(ig,iliq) + fsnoi |
|---|
| 261 | |
|---|
| 262 | ! thermal effects |
|---|
| 263 | pdtsurf_hyd(ig) = -fsnoi*RLFTT/pcapcal(ig)/ptimestep |
|---|
| 264 | |
|---|
| 265 | endif |
|---|
| 266 | else |
|---|
| 267 | |
|---|
| 268 | ! freeze the water |
|---|
| 269 | if(zqsurf(ig,iliq).gt.1.0e-8)then |
|---|
| 270 | |
|---|
| 271 | a = -(ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT |
|---|
| 272 | b = zqsurf(ig,iliq) |
|---|
| 273 | |
|---|
| 274 | fsnoi = min(a,b) |
|---|
| 275 | |
|---|
| 276 | zqsurf(ig,iice) = zqsurf(ig,iice) + fsnoi |
|---|
| 277 | zqsurf(ig,iliq) = zqsurf(ig,iliq) - fsnoi |
|---|
| 278 | |
|---|
| 279 | ! thermal effects |
|---|
| 280 | pdtsurf_hyd(ig) = +fsnoi*RLFTT/pcapcal(ig)/ptimestep |
|---|
| 281 | |
|---|
| 282 | endif |
|---|
| 283 | endif |
|---|
| 284 | |
|---|
| 285 | ! deal with runoff |
|---|
| 286 | if(activerunoff)then |
|---|
| 287 | |
|---|
| 288 | runoff(ig) = max(zqsurf(ig,iliq) - mx_eau_sol, 0.0) |
|---|
| 289 | if(ngrid.gt.1)then ! runoff only exists in 3D |
|---|
| 290 | if(runoff(ig).ne.0.0)then |
|---|
| 291 | zqsurf(ig,iliq) = mx_eau_sol |
|---|
| 292 | ! runoff is added to ocean at end |
|---|
| 293 | endif |
|---|
| 294 | end if |
|---|
| 295 | |
|---|
| 296 | endif |
|---|
| 297 | |
|---|
| 298 | ! re-calculate continental albedo |
|---|
| 299 | albedo(ig) = albedo0(ig) ! albedo0 = base values |
|---|
| 300 | if (zqsurf(ig,iice).ge.snowlayer) then |
|---|
| 301 | albedo(ig) = albedosnow |
|---|
| 302 | else |
|---|
| 303 | albedo(ig) = albedo0(ig) & |
|---|
| 304 | + (albedosnow - albedo0(ig))*zqsurf(ig,iice)/snowlayer |
|---|
| 305 | endif |
|---|
| 306 | |
|---|
| 307 | else |
|---|
| 308 | |
|---|
| 309 | print*,'Surface type not recognised in hydrol.F!' |
|---|
| 310 | print*,'Exiting...' |
|---|
| 311 | call abort |
|---|
| 312 | |
|---|
| 313 | endif |
|---|
| 314 | |
|---|
| 315 | end do ! ig=1,ngrid |
|---|
| 316 | |
|---|
| 317 | ! perform crude bulk averaging of temperature in ocean |
|---|
| 318 | ! ---------------------------------------------------- |
|---|
| 319 | if(oceanbulkavg)then |
|---|
| 320 | |
|---|
| 321 | oceanarea2=0. |
|---|
| 322 | DO ig=1,ngrid |
|---|
| 323 | if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then |
|---|
| 324 | oceanarea2=oceanarea2+area(ig)*pcapcal(ig) |
|---|
| 325 | end if |
|---|
| 326 | END DO |
|---|
| 327 | |
|---|
| 328 | tsea=0. |
|---|
| 329 | DO ig=1,ngrid |
|---|
| 330 | if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then |
|---|
| 331 | tsea=tsea+ztsurf(ig)*area(ig)*pcapcal(ig)/oceanarea2 |
|---|
| 332 | end if |
|---|
| 333 | END DO |
|---|
| 334 | |
|---|
| 335 | DO ig=1,ngrid |
|---|
| 336 | if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0))then |
|---|
| 337 | pdtsurf_hyd(ig) = pdtsurf_hyd(ig) + (tsea-ztsurf(ig))/oceantime |
|---|
| 338 | end if |
|---|
| 339 | END DO |
|---|
| 340 | |
|---|
| 341 | print*,'Mean ocean temperature = ',tsea,' K' |
|---|
| 342 | |
|---|
| 343 | endif |
|---|
| 344 | |
|---|
| 345 | ! shove all the runoff water into the ocean |
|---|
| 346 | ! ----------------------------------------- |
|---|
| 347 | if(activerunoff)then |
|---|
| 348 | |
|---|
| 349 | totalrunoff=0. |
|---|
| 350 | do ig=1,ngrid |
|---|
| 351 | if (nint(rnat(ig)).eq.1) then |
|---|
| 352 | totalrunoff = totalrunoff + area(ig)*runoff(ig) |
|---|
| 353 | endif |
|---|
| 354 | enddo |
|---|
| 355 | |
|---|
| 356 | do ig=1,ngrid |
|---|
| 357 | if (nint(rnat(ig)).eq.0) then |
|---|
| 358 | zqsurf(ig,iliq) = zqsurf(ig,iliq) + & |
|---|
| 359 | totalrunoff/oceanarea |
|---|
| 360 | endif |
|---|
| 361 | enddo |
|---|
| 362 | |
|---|
| 363 | endif |
|---|
| 364 | |
|---|
| 365 | |
|---|
| 366 | ! Re-add the albedo effects of CO2 ice if necessary |
|---|
| 367 | ! ------------------------------------------------- |
|---|
| 368 | if(co2cond)then |
|---|
| 369 | |
|---|
| 370 | icap=1 |
|---|
| 371 | do ig=1,ngrid |
|---|
| 372 | if (qsurf(ig,igcm_co2_ice).gt.0) then |
|---|
| 373 | albedo(ig) = albedice(icap) |
|---|
| 374 | endif |
|---|
| 375 | enddo |
|---|
| 376 | |
|---|
| 377 | endif |
|---|
| 378 | |
|---|
| 379 | |
|---|
| 380 | do ig=1,ngrid |
|---|
| 381 | dqs_hyd(ig,iliq)=(zqsurf(ig,iliq) - qsurf(ig,iliq))/ptimestep |
|---|
| 382 | dqs_hyd(ig,iice)=(zqsurf(ig,iice) - qsurf(ig,iice))/ptimestep |
|---|
| 383 | enddo |
|---|
| 384 | |
|---|
| 385 | if (activerunoff) then |
|---|
| 386 | call writediagfi(ngrid,'runoff','Runoff amount',' ',2,runoff) |
|---|
| 387 | endif |
|---|
| 388 | |
|---|
| 389 | return |
|---|
| 390 | end subroutine hydrol |
|---|
![(please configure the [header_logo] section in trac.ini)](/dynamico/chrome/site/your_project_logo.png){kind=logo}
