| 1 |
jmc |
1.1 |
! $Header: $ |
| 2 |
|
|
! $Name: $ |
| 3 |
|
|
|
| 4 |
|
|
module lscale_cond_mod |
| 5 |
|
|
|
| 6 |
|
|
!----------------------------------------------------------------------- |
| 7 |
|
|
!use fms_mod, only: file_exist, error_mesg, open_file, & |
| 8 |
|
|
! check_nml_error, mpp_pe, FATAL, & |
| 9 |
|
|
! close_file |
| 10 |
|
|
use simple_sat_vapor_pres_mod, only: escomp, descomp |
| 11 |
|
|
|
| 12 |
|
|
use constants_mod, only: HLv,HLs,Cp_air,Grav,rdgas,rvgas |
| 13 |
|
|
use gcm_params_mod, only: gcm_LEN_MBUF, gcm_SQZ_R, gcm_stdMsgUnit |
| 14 |
|
|
|
| 15 |
|
|
implicit none |
| 16 |
|
|
private |
| 17 |
|
|
!----------------------------------------------------------------------- |
| 18 |
|
|
! ---- public interfaces ---- |
| 19 |
|
|
|
| 20 |
|
|
public lscale_cond, lscale_cond_init |
| 21 |
|
|
|
| 22 |
|
|
!----------------------------------------------------------------------- |
| 23 |
|
|
! ---- version number ---- |
| 24 |
|
|
|
| 25 |
|
|
character(len=128) :: version = '$Id: lscale_cond_mod.F90,v 1.2 2013/02/06 04:07:52 jmc Exp $' |
| 26 |
|
|
character(len=128) :: tag = '$Name: $' |
| 27 |
|
|
|
| 28 |
|
|
!----------------------------------------------------------------------- |
| 29 |
|
|
! ---- local/private data ---- |
| 30 |
|
|
|
| 31 |
|
|
real, parameter :: d622 = rdgas/rvgas |
| 32 |
|
|
real, parameter :: d378 = 1.-d622 |
| 33 |
|
|
|
| 34 |
|
|
logical :: do_init=.true. |
| 35 |
|
|
|
| 36 |
|
|
!----------------------------------------------------------------------- |
| 37 |
|
|
! --- namelist ---- |
| 38 |
|
|
|
| 39 |
|
|
real :: hc=1.00 |
| 40 |
|
|
logical :: do_evap=.false. |
| 41 |
|
|
|
| 42 |
|
|
namelist /lscale_cond_nml/ hc, do_evap |
| 43 |
|
|
|
| 44 |
|
|
!----------------------------------------------------------------------- |
| 45 |
|
|
! description of namelist variables |
| 46 |
|
|
! |
| 47 |
|
|
! hc = relative humidity at which large scale condensation |
| 48 |
|
|
! occurs, where 0 <= hc <= 1 (default: hc=1.) |
| 49 |
|
|
! |
| 50 |
|
|
! do_evap = flag for the re-evaporation of moisture in |
| 51 |
|
|
! sub-saturated layers below, if do_evap=.true. then |
| 52 |
|
|
! re-evaporation is performed (default: do_evap=.false.) |
| 53 |
|
|
! |
| 54 |
|
|
!----------------------------------------------------------------------- |
| 55 |
|
|
|
| 56 |
|
|
contains |
| 57 |
|
|
|
| 58 |
|
|
!####################################################################### |
| 59 |
|
|
|
| 60 |
|
|
! subroutine lscale_cond (tin, qin, pfull, phalf, coldT, & |
| 61 |
|
|
! rain, snow, tdel, qdel, mask, conv) |
| 62 |
|
|
subroutine lscale_cond (tin, qin, pfull, phalf, coldT, & |
| 63 |
|
|
rain, snow, tdel, qdel, qsat, & |
| 64 |
|
|
myThid, mask, conv ) |
| 65 |
|
|
|
| 66 |
|
|
|
| 67 |
|
|
!----------------------------------------------------------------------- |
| 68 |
|
|
! |
| 69 |
|
|
! large scale condensation |
| 70 |
|
|
! |
| 71 |
|
|
!----------------------------------------------------------------------- |
| 72 |
|
|
! |
| 73 |
|
|
! input: tin temperature at full model levels |
| 74 |
|
|
! qin specific humidity of water vapor at full |
| 75 |
|
|
! model levels |
| 76 |
|
|
! pfull pressure at full model levels |
| 77 |
|
|
! phalf pressure at half (interface) model levels |
| 78 |
|
|
! coldT should precipitation be snow at this point? |
| 79 |
|
|
! optional: |
| 80 |
|
|
! mask optional mask (0 or 1.) |
| 81 |
|
|
! conv logical flag; if true then no large-scale |
| 82 |
|
|
! adjustment is performed at that grid-point or |
| 83 |
|
|
! model level |
| 84 |
|
|
! |
| 85 |
|
|
! output: rain liquid precipitation (kg/m2) |
| 86 |
|
|
! snow frozen precipitation (kg/m2) |
| 87 |
|
|
! tdel temperature tendency at full model levels |
| 88 |
|
|
! qdel specific humidity tendency (of water vapor) at |
| 89 |
|
|
! full model levels |
| 90 |
|
|
! qsat saturated specific humidity |
| 91 |
|
|
! |
| 92 |
|
|
!----------------------------------------------------------------------- |
| 93 |
|
|
!--------------------- interface arguments ----------------------------- |
| 94 |
|
|
|
| 95 |
|
|
real , intent(in) , dimension(:,:,:) :: tin, qin, pfull, phalf |
| 96 |
|
|
logical , intent(in) , dimension(:,:):: coldT |
| 97 |
|
|
real , intent(out), dimension(:,:) :: rain,snow |
| 98 |
|
|
real , intent(out), dimension(:,:,:) :: tdel, qdel, qsat |
| 99 |
|
|
integer, intent(in) :: myThid |
| 100 |
|
|
real , intent(in) , dimension(:,:,:), optional :: mask |
| 101 |
|
|
logical, intent(in) , dimension(:,:,:), optional :: conv |
| 102 |
|
|
!----------------------------------------------------------------------- |
| 103 |
|
|
!---------------------- local data ------------------------------------- |
| 104 |
|
|
|
| 105 |
|
|
logical,dimension(size(tin,1),size(tin,2),size(tin,3)) :: do_adjust |
| 106 |
|
|
real,dimension(size(tin,1),size(tin,2),size(tin,3)) :: & |
| 107 |
|
|
esat, desat, dqsat, pmes, pmass |
| 108 |
|
|
real,dimension(size(tin,1),size(tin,2)) :: hlcp, precip |
| 109 |
|
|
integer k, kx |
| 110 |
|
|
!----------------------------------------------------------------------- |
| 111 |
|
|
! computation of precipitation by condensation processes |
| 112 |
|
|
!----------------------------------------------------------------------- |
| 113 |
|
|
|
| 114 |
|
|
! if (do_init) call error_mesg ('lscale_cond', & |
| 115 |
|
|
! 'lscale_cond_init has not been called.', FATAL) |
| 116 |
|
|
|
| 117 |
|
|
kx=size(tin,3) |
| 118 |
|
|
|
| 119 |
|
|
!----- compute proper latent heat -------------------------------------- |
| 120 |
|
|
WHERE (coldT) |
| 121 |
|
|
hlcp = HLs/Cp_air |
| 122 |
|
|
ELSEWHERE |
| 123 |
|
|
hlcp = HLv/Cp_air |
| 124 |
|
|
END WHERE |
| 125 |
|
|
|
| 126 |
|
|
!----- saturation vapor pressure (esat) & specific humidity (qsat) ----- |
| 127 |
|
|
|
| 128 |
|
|
call escomp (tin,esat) |
| 129 |
|
|
call descomp (tin,desat) |
| 130 |
|
|
|
| 131 |
|
|
|
| 132 |
|
|
esat(:,:,:)=esat(:,:,:)*hc |
| 133 |
|
|
|
| 134 |
|
|
where (pfull(:,:,:) > d378*esat(:,:,:)) |
| 135 |
|
|
pmes(:,:,:)=1.0/(pfull(:,:,:)-d378*esat(:,:,:)) |
| 136 |
|
|
qsat(:,:,:)=d622*esat(:,:,:)*pmes(:,:,:) |
| 137 |
|
|
qsat(:,:,:)=max(0.0,qsat(:,:,:)) |
| 138 |
|
|
dqsat(:,:,:)=d622*pfull(:,:,:)*desat(:,:,:)*pmes(:,:,:)*pmes(:,:,:) |
| 139 |
|
|
elsewhere |
| 140 |
|
|
pmes(:,:,:)=0.0 |
| 141 |
|
|
qsat(:,:,:)=0.0 |
| 142 |
|
|
dqsat(:,:,:)=0.0 |
| 143 |
|
|
endwhere |
| 144 |
|
|
|
| 145 |
|
|
!--------- do adjustment where greater than saturated value ------------ |
| 146 |
|
|
|
| 147 |
|
|
if (present(conv)) then |
| 148 |
|
|
!!!! do_adjust(:,:,:)=(.not.conv(:,:,:) .and. qin(:,:,:) > qsat(:,:,:)) |
| 149 |
|
|
do_adjust(:,:,:)=(.not.conv(:,:,:) .and. & |
| 150 |
|
|
(qin(:,:,:) - qsat(:,:,:))*qsat(:,:,:) > 0.0) |
| 151 |
|
|
else |
| 152 |
|
|
!!!! do_adjust(:,:,:)=(qin(:,:,:) > qsat(:,:,:)) |
| 153 |
|
|
do_adjust(:,:,:)=( (qin(:,:,:) - qsat(:,:,:))*qsat(:,:,:) > 0.0) |
| 154 |
|
|
endif |
| 155 |
|
|
|
| 156 |
|
|
if (present(mask)) then |
| 157 |
|
|
do_adjust(:,:,:)=do_adjust(:,:,:) .and. (mask(:,:,:) > 0.5) |
| 158 |
|
|
end if |
| 159 |
|
|
|
| 160 |
|
|
!----------- compute adjustments to temp and spec humidity ------------- |
| 161 |
|
|
do k = 1,kx |
| 162 |
|
|
where (do_adjust(:,:,k)) |
| 163 |
|
|
qdel(:,:,k)=(qsat(:,:,k)-qin(:,:,k))/(1.0+hlcp(:,:)*dqsat(:,:,k)) |
| 164 |
|
|
tdel(:,:,k)=-hlcp(:,:)*qdel(:,:,k) |
| 165 |
|
|
elsewhere |
| 166 |
|
|
qdel(:,:,k)=0.0 |
| 167 |
|
|
tdel(:,:,k)=0.0 |
| 168 |
|
|
endwhere |
| 169 |
|
|
end do |
| 170 |
|
|
|
| 171 |
|
|
|
| 172 |
|
|
!------------ pressure mass of each layer ------------------------------ |
| 173 |
|
|
|
| 174 |
|
|
do k=1,kx |
| 175 |
|
|
pmass(:,:,k)=(phalf(:,:,k+1)-phalf(:,:,k))/Grav |
| 176 |
|
|
enddo |
| 177 |
|
|
|
| 178 |
|
|
!------------ re-evaporation of precipitation in dry layer below ------- |
| 179 |
|
|
|
| 180 |
|
|
if (do_evap) then |
| 181 |
|
|
if (present(mask)) then |
| 182 |
|
|
! call precip_evap (pmass,tin,qin,qsat,dqsat,hlcp,tdel,qdel,mask) |
| 183 |
|
|
call precip_evap (pmass,tin,qin,qsat,dqsat,hlcp,tdel,qdel, & |
| 184 |
|
|
myThid, mask ) |
| 185 |
|
|
else |
| 186 |
|
|
call precip_evap (pmass,tin,qin,qsat,dqsat,hlcp,tdel,qdel, & |
| 187 |
|
|
myThid ) |
| 188 |
|
|
endif |
| 189 |
|
|
endif |
| 190 |
|
|
|
| 191 |
|
|
!------------ integrate precip ----------------------------------------- |
| 192 |
|
|
|
| 193 |
|
|
precip(:,:)=0.0 |
| 194 |
|
|
do k=1,kx |
| 195 |
|
|
precip(:,:)=precip(:,:)-pmass(:,:,k)*qdel(:,:,k) |
| 196 |
|
|
enddo |
| 197 |
|
|
precip(:,:)=max(precip(:,:),0.0) |
| 198 |
|
|
|
| 199 |
|
|
!assign precip to snow or rain |
| 200 |
|
|
WHERE (coldT) |
| 201 |
|
|
snow = precip |
| 202 |
|
|
rain = 0. |
| 203 |
|
|
ELSEWHERE |
| 204 |
|
|
rain = precip |
| 205 |
|
|
snow = 0. |
| 206 |
|
|
END WHERE |
| 207 |
|
|
|
| 208 |
|
|
!----------------------------------------------------------------------- |
| 209 |
|
|
|
| 210 |
|
|
end subroutine lscale_cond |
| 211 |
|
|
|
| 212 |
|
|
!####################################################################### |
| 213 |
|
|
|
| 214 |
|
|
! subroutine precip_evap (pmass, tin, qin, qsat, dqsat, hlcp, & |
| 215 |
|
|
! tdel, qdel, mask) |
| 216 |
|
|
subroutine precip_evap (pmass, tin, qin, qsat, dqsat, hlcp, & |
| 217 |
|
|
tdel, qdel, myThid, mask ) |
| 218 |
|
|
|
| 219 |
|
|
!----------------------------------------------------------------------- |
| 220 |
|
|
! performs re-evaporation of falling precipitation |
| 221 |
|
|
!----------------------------------------------------------------------- |
| 222 |
|
|
real, intent(in), dimension(:,:,:) :: pmass, tin, qin, qsat, dqsat |
| 223 |
|
|
real, intent(in), dimension(:,:) :: hlcp |
| 224 |
|
|
real, intent(inout), dimension(:,:,:) :: tdel, qdel |
| 225 |
|
|
integer, intent(in) :: myThid |
| 226 |
|
|
real, intent(in), dimension(:,:,:), optional :: mask |
| 227 |
|
|
!----------------------------------------------------------------------- |
| 228 |
|
|
real, dimension(size(tin,1),size(tin,2)) :: exq, def |
| 229 |
|
|
|
| 230 |
|
|
integer k |
| 231 |
|
|
!----------------------------------------------------------------------- |
| 232 |
|
|
exq(:,:)=0.0 |
| 233 |
|
|
|
| 234 |
|
|
do k=1,size(tin,3) |
| 235 |
|
|
|
| 236 |
|
|
where (qdel(:,:,k) < 0.0) exq(:,:) = exq(:,:) - & |
| 237 |
|
|
qdel(:,:,k)*pmass(:,:,k) |
| 238 |
|
|
|
| 239 |
|
|
if (present(mask)) exq(:,:) = exq(:,:)*mask(:,:,k) |
| 240 |
|
|
|
| 241 |
|
|
! ---- evaporate precip where needed ------ |
| 242 |
|
|
|
| 243 |
|
|
where ( (qdel(:,:,k) >= 0.0) .and. (exq(:,:) > 0.0) ) |
| 244 |
|
|
exq(:,:) = exq(:,:) / pmass(:,:,k) |
| 245 |
|
|
def(:,:) = (qsat(:,:,k)-qin(:,:,k))/(1.+hlcp(:,:)*dqsat(:,:,k)) |
| 246 |
|
|
def(:,:) = min(max(def(:,:),0.0),exq(:,:)) |
| 247 |
|
|
qdel(:,:,k) = qdel(:,:,k) + def(:,:) |
| 248 |
|
|
tdel(:,:,k) = tdel(:,:,k) - def(:,:)*hlcp(:,:) |
| 249 |
|
|
exq(:,:) = (exq(:,:)-def(:,:))*pmass(:,:,k) |
| 250 |
|
|
endwhere |
| 251 |
|
|
|
| 252 |
|
|
enddo |
| 253 |
|
|
|
| 254 |
|
|
!----------------------------------------------------------------------- |
| 255 |
|
|
|
| 256 |
|
|
end subroutine precip_evap |
| 257 |
|
|
|
| 258 |
|
|
!####################################################################### |
| 259 |
|
|
|
| 260 |
|
|
subroutine lscale_cond_init (myThid) |
| 261 |
|
|
|
| 262 |
|
|
!----------------------------------------------------------------------- |
| 263 |
|
|
! |
| 264 |
|
|
! initialization for large scale condensation |
| 265 |
|
|
! |
| 266 |
|
|
!----------------------------------------------------------------------- |
| 267 |
|
|
|
| 268 |
|
|
integer, intent(in) :: myThid |
| 269 |
|
|
|
| 270 |
|
|
!----------------------------------------------------------------------- |
| 271 |
|
|
|
| 272 |
|
|
! integer unit,io,ierr |
| 273 |
|
|
integer :: iUnit |
| 274 |
|
|
CHARACTER*(gcm_LEN_MBUF) :: msgBuf |
| 275 |
|
|
|
| 276 |
|
|
|
| 277 |
|
|
!----------- read namelist --------------------------------------------- |
| 278 |
|
|
|
| 279 |
|
|
! _BARRIER |
| 280 |
|
|
! _BEGIN_MASTER(myThid) |
| 281 |
|
|
CALL BARRIER(myThid) |
| 282 |
|
|
IF ( myThid.EQ.1 ) THEN |
| 283 |
|
|
|
| 284 |
|
|
WRITE(msgBuf,'(A)') 'LSCALE_COND_INIT: opening data.atm_gray' |
| 285 |
|
|
CALL PRINT_MESSAGE( msgBuf, gcm_stdMsgUnit, gcm_SQZ_R, myThid ) |
| 286 |
|
|
CALL OPEN_COPY_DATA_FILE( & |
| 287 |
|
|
'data.atm_gray', 'LSCALE_COND_INIT', & |
| 288 |
|
|
iUnit, & |
| 289 |
|
|
myThid ) |
| 290 |
|
|
! Read parameters from open data file |
| 291 |
|
|
READ(UNIT=iUnit,NML=lscale_cond_nml) |
| 292 |
|
|
WRITE(msgBuf,'(A)') & |
| 293 |
|
|
'LSCALE_COND_INIT: finished reading data.atm_gray' |
| 294 |
|
|
CALL PRINT_MESSAGE( msgBuf, gcm_stdMsgUnit, gcm_SQZ_R, myThid ) |
| 295 |
|
|
! Close the open data file |
| 296 |
|
|
CLOSE(iUnit) |
| 297 |
|
|
|
| 298 |
|
|
! if (file_exist('input.nml')) then |
| 299 |
|
|
! unit = open_file (file='input.nml', action='read') |
| 300 |
|
|
! ierr=1; do while (ierr /= 0) |
| 301 |
|
|
! read (unit, nml=lscale_cond_nml, iostat=io, end=10) |
| 302 |
|
|
! ierr = check_nml_error (io,'lscale_cond_nml') |
| 303 |
|
|
! enddo |
| 304 |
|
|
! 10 call close_file (unit) |
| 305 |
|
|
! endif |
| 306 |
|
|
|
| 307 |
|
|
!---------- output namelist -------------------------------------------- |
| 308 |
|
|
|
| 309 |
|
|
! unit = open_file (file='logfile.out', action='append') |
| 310 |
|
|
! if ( mpp_pe() == 0 ) then |
| 311 |
|
|
! write (unit,'(/,80("="),/(a))') trim(version), trim(tag) |
| 312 |
|
|
! write (unit,nml=lscale_cond_nml) |
| 313 |
|
|
! endif |
| 314 |
|
|
! call close_file (unit) |
| 315 |
|
|
|
| 316 |
|
|
do_init=.false. |
| 317 |
|
|
|
| 318 |
|
|
ENDIF |
| 319 |
|
|
CALL BARRIER(myThid) |
| 320 |
|
|
|
| 321 |
|
|
end subroutine lscale_cond_init |
| 322 |
|
|
|
| 323 |
|
|
!####################################################################### |
| 324 |
|
|
|
| 325 |
|
|
end module lscale_cond_mod |
| 326 |
|
|
|
Parent Directory
| 
Revision Log
| 
Revision Graph