| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/phy_radiat.F,v 1.2 2004/03/11 14:33:19 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "AIM_OPTIONS.h" |
| 5 |
|
| 6 |
SUBROUTINE SOL_OZ (SOLC, TYEAR, SLAT, CLAT, |
| 7 |
O FSOL, OZONE, OZUPP, ZENIT, STRATZ, |
| 8 |
I bi, bj, myThid) |
| 9 |
|
| 10 |
C-- |
| 11 |
C-- SUBROUTINE SOL_OZ (SOLC,TYEAR) |
| 12 |
C-- |
| 13 |
C-- Purpose: Compute the flux of incoming solar radiation |
| 14 |
C-- and a climatological ozone profile for SW absorption |
| 15 |
C-- Input: SOLC = solar constant (area averaged) |
| 16 |
C-- TYEAR = time as fraction of year (0-1, 0 = 1jan.h00) |
| 17 |
C SLAT = sin(lat) |
| 18 |
C CLAT = cos(lat) |
| 19 |
C-- Output: FSOL = flux of incoming solar radiation |
| 20 |
C-- OZONE = flux absorbed by ozone (lower stratos.) |
| 21 |
C-- OZUPP = flux absorbed by ozone (upper stratos.) |
| 22 |
C-- ZENIT = function of solar zenith angle |
| 23 |
C-- STRATZ = ? |
| 24 |
C-- Updated common blocks: RADZON |
| 25 |
C-- |
| 26 |
|
| 27 |
IMPLICIT NONE |
| 28 |
|
| 29 |
C Resolution parameters |
| 30 |
|
| 31 |
C-- size for MITgcm & Physics package : |
| 32 |
#include "AIM_SIZE.h" |
| 33 |
|
| 34 |
#include "EEPARAMS.h" |
| 35 |
|
| 36 |
C Constants + functions of sigma and latitude |
| 37 |
#include "com_physcon.h" |
| 38 |
|
| 39 |
C Radiation constants |
| 40 |
#include "com_radcon.h" |
| 41 |
|
| 42 |
C-- Routine arguments: |
| 43 |
INTEGER bi, bj, myThid |
| 44 |
_RL SOLC, TYEAR |
| 45 |
_RL SLAT(NGP), CLAT(NGP) |
| 46 |
_RL FSOL(NGP), OZONE(NGP), OZUPP(NGP), ZENIT(NGP), STRATZ(NGP) |
| 47 |
|
| 48 |
#ifdef ALLOW_AIM |
| 49 |
|
| 50 |
C-- Local variables: |
| 51 |
INTEGER J, NZEN |
| 52 |
|
| 53 |
C- jmc: declare all local variables: |
| 54 |
_RL ALPHA, CSR1, CSR2, COZ1, COZ2 |
| 55 |
_RL AZEN, RZEN, CZEN, SZEN, AST, FS0, FLAT2 |
| 56 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 57 |
|
| 58 |
C ALPHA = year phase ( 0 - 2pi, 0 = winter solstice = 22dec.h00 ) |
| 59 |
ALPHA = 4. _d 0*ASIN(1. _d 0)*(TYEAR+10. _d 0/365. _d 0) |
| 60 |
|
| 61 |
CSR1=-0.796 _d 0*COS(ALPHA) |
| 62 |
CSR2= 0.147 _d 0*COS(2. _d 0*ALPHA)-0.477 _d 0 |
| 63 |
COZ1= 1.0 _d 0 * COS(ALPHA) |
| 64 |
COZ2= 1.8 _d 0 |
| 65 |
C |
| 66 |
AZEN=1.0 |
| 67 |
NZEN=2 |
| 68 |
|
| 69 |
RZEN=-COS(ALPHA)*23.45 _d 0*ASIN(1. _d 0)/90. _d 0 |
| 70 |
CZEN=COS(RZEN) |
| 71 |
SZEN=SIN(RZEN) |
| 72 |
|
| 73 |
AST=0.025 _d 0 |
| 74 |
FS0=10. _d 0 |
| 75 |
C FS0=16.-8.*COS(ALPHA) |
| 76 |
|
| 77 |
DO J=1,NGP |
| 78 |
|
| 79 |
FLAT2 = 1.5 _d 0*SLAT(J)**2 - 0.5 _d 0 |
| 80 |
|
| 81 |
C solar radiation at the top |
| 82 |
FSOL(J) = SOLC* |
| 83 |
& MAX( 0. _d 0, 1. _d 0+CSR1*SLAT(J)+CSR2*FLAT2 ) |
| 84 |
|
| 85 |
C ozone depth in upper and lower stratosphere |
| 86 |
OZUPP(J) = EPSSW*(1.-FLAT2) |
| 87 |
OZONE(J) = EPSSW*(1.+COZ1*SLAT(J)+COZ2*FLAT2) |
| 88 |
|
| 89 |
C zenith angle correction to (downward) absorptivity |
| 90 |
ZENIT(J) = 1. + AZEN* |
| 91 |
& (1. _d 0-(CLAT(J)*CZEN+SLAT(J)*SZEN))**NZEN |
| 92 |
|
| 93 |
C ozone absorption in upper and lower stratosphere |
| 94 |
OZUPP(J)=FSOL(J)*OZUPP(J)*ZENIT(J) |
| 95 |
OZONE(J)=FSOL(J)*OZONE(J)*ZENIT(J) |
| 96 |
STRATZ(J)=AST*FSOL(J)*CLAT(J)**3 |
| 97 |
& +MAX( FS0-FSOL(J), 0. _d 0 ) |
| 98 |
|
| 99 |
ENDDO |
| 100 |
|
| 101 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 102 |
|
| 103 |
#endif /* ALLOW_AIM */ |
| 104 |
RETURN |
| 105 |
END |
| 106 |
|
| 107 |
|
| 108 |
SUBROUTINE RADSW (PSA,dpFac,QA,RH,ALB, |
| 109 |
I FSOL, OZONE, OZUPP, ZENIT, STRATZ, |
| 110 |
O TAU2, STRATC, |
| 111 |
O ICLTOP,CLOUDC,FTOP,FSFC,DFABS, |
| 112 |
I kGrd,bi,bj,myThid) |
| 113 |
C-- |
| 114 |
C-- SUBROUTINE RADSW (PSA,QA,RH,ALB, |
| 115 |
C-- & ICLTOP,CLOUDC,FTOP,FSFC,DFABS) |
| 116 |
C-- |
| 117 |
C-- Purpose: Compute the absorption of shortwave radiation and |
| 118 |
C-- initialize arrays for longwave-radiation routines |
| 119 |
C-- Input: PSA = norm. surface pressure [p/p0] (2-dim) |
| 120 |
C dpFac = cell delta_P fraction (3-dim) |
| 121 |
C-- QA = specific humidity [g/kg] (3-dim) |
| 122 |
C-- RH = relative humidity (3-dim) |
| 123 |
C-- ALB = surface albedo (2-dim) |
| 124 |
C-- Output: ICLTOP = cloud top level (2-dim) |
| 125 |
C-- CLOUDC = total cloud cover (2-dim) |
| 126 |
C-- FTOP = net downw. flux of sw rad. at the atm. top (2-dim) |
| 127 |
C-- FSFC = net downw. flux of sw rad. at the surface (2-dim) |
| 128 |
C-- DFABS = flux of sw rad. absorbed by each atm. layer (3-dim) |
| 129 |
C Input: kGrd = Ground level index (2-dim) |
| 130 |
C bi,bj = tile index |
| 131 |
C myThid = Thread number for this instance of the routine |
| 132 |
C-- |
| 133 |
|
| 134 |
IMPLICIT NONE |
| 135 |
|
| 136 |
C Resolution parameters |
| 137 |
|
| 138 |
C-- size for MITgcm & Physics package : |
| 139 |
#include "AIM_SIZE.h" |
| 140 |
|
| 141 |
#include "EEPARAMS.h" |
| 142 |
|
| 143 |
C Constants + functions of sigma and latitude |
| 144 |
|
| 145 |
#include "com_physcon.h" |
| 146 |
|
| 147 |
C Radiation parameters |
| 148 |
|
| 149 |
#include "com_radcon.h" |
| 150 |
|
| 151 |
C-- Routine arguments: |
| 152 |
_RL PSA(NGP),dpFac(NGP,NLEV),QA(NGP,NLEV),RH(NGP,NLEV) |
| 153 |
_RL ALB(NGP,0:3) |
| 154 |
INTEGER ICLTOP(NGP) |
| 155 |
_RL CLOUDC(NGP), FTOP(NGP), FSFC(NGP,0:3), DFABS(NGP,NLEV) |
| 156 |
|
| 157 |
_RL FSOL(NGP), OZONE(NGP), OZUPP(NGP), ZENIT(NGP), STRATZ(NGP) |
| 158 |
_RL TAU2(NGP,NLEV,NBAND),STRATC(NGP) |
| 159 |
c _RL FLUX(NGP,4) |
| 160 |
|
| 161 |
INTEGER kGrd(NGP) |
| 162 |
INTEGER bi, bj, myThid |
| 163 |
|
| 164 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 165 |
|
| 166 |
#ifdef ALLOW_AIM |
| 167 |
|
| 168 |
C-- Local variables: |
| 169 |
c _RL QCLOUD(NGP), ACLOUD(NGP), PSAZ(NGP), |
| 170 |
_RL QCLOUD(NGP), ACLOUD(NGP), |
| 171 |
& ALBTOP(NGP,NLEV), FREFL(NGP,NLEV), FLUX(NGP,2) |
| 172 |
|
| 173 |
C- jmc: define "FLUX" as a local variable & remove Equivalences: |
| 174 |
c EQUIVALENCE (ALBTOP(1,1),TAU2(1,1,3)) |
| 175 |
c EQUIVALENCE ( FREFL(1,1),TAU2(1,1,4)) |
| 176 |
|
| 177 |
INTEGER NL1(NGP) |
| 178 |
INTEGER K, J |
| 179 |
LOGICAL makeClouds |
| 180 |
|
| 181 |
C- jmc: declare local variables: |
| 182 |
_RL FBAND1, FBAND2, RRCL, RQCL, DQACL, QACL3 |
| 183 |
_RL ABS1, DELTAP |
| 184 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 185 |
|
| 186 |
FBAND2=0.05 _d 0 |
| 187 |
FBAND1=1.-FBAND2 |
| 188 |
|
| 189 |
DO J=1,NGP |
| 190 |
NL1(J)=kGrd(J)-1 |
| 191 |
ENDDO |
| 192 |
|
| 193 |
C-- 1. Cloud cover: |
| 194 |
C defined as a linear fun. of the maximum relative humidity |
| 195 |
C in all tropospheric layers above PBL: |
| 196 |
C CLOUDC = 0 for RHmax < RHCL1, = 1 for RHmax > RHCL2. |
| 197 |
C This value is reduced by a factor (Qbase/QACL) if the |
| 198 |
C cloud-base absolute humidity Qbase < QACL. |
| 199 |
C |
| 200 |
makeClouds = ICLTOP(1) .GE. 0 |
| 201 |
RRCL=1./(RHCL2-RHCL1) |
| 202 |
RQCL=1./QACL2 |
| 203 |
C |
| 204 |
DO J=1,NGP |
| 205 |
CLOUDC(J)=0. |
| 206 |
QCLOUD(J)=0. |
| 207 |
ICLTOP(J)=NLEV+1 |
| 208 |
FREFL(J,1)=0. |
| 209 |
ENDDO |
| 210 |
|
| 211 |
DO K=1,NLEV |
| 212 |
DO J=1,NGP |
| 213 |
ALBTOP(J,K)=0. |
| 214 |
ENDDO |
| 215 |
ENDDO |
| 216 |
C |
| 217 |
IF ( makeClouds ) THEN |
| 218 |
C- skipp this part for clear-sky diagnostics |
| 219 |
|
| 220 |
DQACL=(QACL2-QACL1)/(0.5 _d 0 - SIG(2)) |
| 221 |
DO J=1,NGP |
| 222 |
ICLTOP(J)= kGrd(J) |
| 223 |
DO K=NL1(J),2,-1 |
| 224 |
QACL3=MIN(QACL2,QACL1+DQACL*(SIG(K)-SIG(2))) |
| 225 |
IF (RH(J,K).GT.RHCL1.AND.QA(J,K).GT.QACL1) THEN |
| 226 |
CLOUDC(J)=MAX(CLOUDC(J),RH(J,K)-RHCL1) |
| 227 |
IF (QA(J,K).GT.QACL3) ICLTOP(J)=K |
| 228 |
ENDIF |
| 229 |
ENDDO |
| 230 |
ENDDO |
| 231 |
|
| 232 |
DO J=1,NGP |
| 233 |
IF (kGrd(J).NE.0) |
| 234 |
& QCLOUD(J)= MAX( QA(J,kGrd(J)), QA(J,NL1(J)) ) |
| 235 |
CLOUDC(J)=MIN(1. _d 0,CLOUDC(J)*RRCL) |
| 236 |
IF (CLOUDC(J).GT.0.0) THEN |
| 237 |
CLOUDC(J)=CLOUDC(J)*MIN(1. _d 0,QCLOUD(J)*RQCL) |
| 238 |
ALBTOP(J,ICLTOP(J))=ALBCL*CLOUDC(J) |
| 239 |
ELSE |
| 240 |
ICLTOP(J)=NLEV+1 |
| 241 |
ENDIF |
| 242 |
ENDDO |
| 243 |
|
| 244 |
C- end if makeClouds |
| 245 |
ENDIF |
| 246 |
|
| 247 |
C |
| 248 |
C-- 2. Shortwave transmissivity: |
| 249 |
C function of layer mass, ozone (in the statosphere), |
| 250 |
C abs. humidity and cloud cover (in the troposphere) |
| 251 |
|
| 252 |
DO J=1,NGP |
| 253 |
c_FM PSAZ(J)=PSA(J)*ZENIT(J) |
| 254 |
ACLOUD(J)=CLOUDC(J)*(ABSCL1+ABSCL2*QCLOUD(J)) |
| 255 |
ENDDO |
| 256 |
|
| 257 |
DO J=1,NGP |
| 258 |
c_FM DELTAP=PSAZ(J)*DSIG(1) |
| 259 |
DELTAP=ZENIT(J)*DSIG(1)*dpFac(J,1) |
| 260 |
TAU2(J,1,1)=EXP(-DELTAP*ABSDRY) |
| 261 |
ENDDO |
| 262 |
C |
| 263 |
DO J=1,NGP |
| 264 |
DO K=2,NL1(J) |
| 265 |
c_FM ABS1=ABSDRY+ABSAER*SIG(K)**2 |
| 266 |
c_FM DELTAP=PSAZ(J)*DSIG(K) |
| 267 |
ABS1=ABSDRY+ABSAER*(SIG(K)/PSA(J))**2 |
| 268 |
DELTAP=ZENIT(J)*DSIG(K)*dpFac(J,K) |
| 269 |
IF (K.EQ.ICLTOP(J)) THEN |
| 270 |
TAU2(J,K,1)=EXP(-DELTAP* |
| 271 |
& (ABS1+ABSWV1*QA(J,K)+2.*ACLOUD(J))) |
| 272 |
ELSE IF (K.GT.ICLTOP(J)) THEN |
| 273 |
TAU2(J,K,1)=EXP(-DELTAP* |
| 274 |
& (ABS1+ABSWV1*QA(J,K)+ACLOUD(J))) |
| 275 |
ELSE |
| 276 |
TAU2(J,K,1)=EXP(-DELTAP*(ABS1+ABSWV1*QA(J,K))) |
| 277 |
ENDIF |
| 278 |
ENDDO |
| 279 |
ENDDO |
| 280 |
|
| 281 |
c_FM ABS1=ABSDRY+ABSAER*SIG(NLEV)**2 |
| 282 |
DO J=1,NGP |
| 283 |
K = kGrd(J) |
| 284 |
ABS1=ABSDRY+ABSAER*(SIG(K)/PSA(J))**2 |
| 285 |
c_FM DELTAP=PSAZ(J)*DSIG(NLEV) |
| 286 |
DELTAP=ZENIT(J)*DSIG(K)*dpFac(J,K) |
| 287 |
TAU2(J,K,1)=EXP(-DELTAP*(ABS1+ABSWV1*QA(J,K))) |
| 288 |
ENDDO |
| 289 |
|
| 290 |
DO J=1,NGP |
| 291 |
DO K=2,kGrd(J) |
| 292 |
DELTAP=ZENIT(J)*DSIG(K)*dpFac(J,K) |
| 293 |
TAU2(J,K,2)=EXP(-DELTAP*ABSWV2*QA(J,K)) |
| 294 |
ENDDO |
| 295 |
ENDDO |
| 296 |
C |
| 297 |
C--- 3. Shortwave downward flux |
| 298 |
C |
| 299 |
C 3.1 Absorption in the stratosphere |
| 300 |
|
| 301 |
C 3.1.1 Initialization of fluxes (subtracting |
| 302 |
C ozone absorption in the upper stratosphere) |
| 303 |
|
| 304 |
DO J=1,NGP |
| 305 |
FTOP(J) =FSOL(J) |
| 306 |
FLUX(J,1)=FSOL(J)*FBAND1-OZUPP(J) |
| 307 |
FLUX(J,2)=FSOL(J)*FBAND2 |
| 308 |
STRATC(J)=STRATZ(J)*PSA(J) |
| 309 |
ENDDO |
| 310 |
|
| 311 |
C 3.1.2 Ozone and dry-air absorption |
| 312 |
C in the lower (modelled) stratosphere |
| 313 |
|
| 314 |
DO J=1,NGP |
| 315 |
DFABS(J,1)=FLUX(J,1) |
| 316 |
FLUX (J,1)=TAU2(J,1,1)*(FLUX(J,1)-OZONE(J)*PSA(J)) |
| 317 |
DFABS(J,1)=DFABS(J,1)-FLUX(J,1) |
| 318 |
ENDDO |
| 319 |
|
| 320 |
C 3.3 Absorption and reflection in the troposphere |
| 321 |
C |
| 322 |
DO J=1,NGP |
| 323 |
DO K=2,kGrd(J) |
| 324 |
FREFL(J,K)=FLUX(J,1)*ALBTOP(J,K) |
| 325 |
FLUX (J,1)=FLUX(J,1)-FREFL(J,K) |
| 326 |
DFABS(J,K)=FLUX(J,1) |
| 327 |
FLUX (J,1)=TAU2(J,K,1)*FLUX(J,1) |
| 328 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,1) |
| 329 |
ENDDO |
| 330 |
ENDDO |
| 331 |
|
| 332 |
DO J=1,NGP |
| 333 |
DO K=2,kGrd(J) |
| 334 |
DFABS(J,K)=DFABS(J,K)+FLUX(J,2) |
| 335 |
FLUX (J,2)=TAU2(J,K,2)*FLUX(J,2) |
| 336 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,2) |
| 337 |
ENDDO |
| 338 |
ENDDO |
| 339 |
|
| 340 |
C |
| 341 |
C--- 4. Shortwave upward flux |
| 342 |
C |
| 343 |
C 4.1 Absorption and reflection at the surface |
| 344 |
C |
| 345 |
DO J=1,NGP |
| 346 |
C for each surface type: |
| 347 |
FSFC(J,1)=FLUX(J,1)*(1.-ALB(J,1))+FLUX(J,2) |
| 348 |
FSFC(J,2)=FLUX(J,1)*(1.-ALB(J,2))+FLUX(J,2) |
| 349 |
FSFC(J,3)=FLUX(J,1)*(1.-ALB(J,3))+FLUX(J,2) |
| 350 |
C weighted average according to land/sea/sea-ice fraction: |
| 351 |
FSFC(J,0)=FLUX(J,1)+FLUX(J,2) |
| 352 |
FLUX(J,1)=FLUX(J,1)*ALB(J,0) |
| 353 |
FSFC(J,0)=FSFC(J,0)-FLUX(J,1) |
| 354 |
ENDDO |
| 355 |
C |
| 356 |
C 4.2 Absorption of upward flux |
| 357 |
C |
| 358 |
DO J=1,NGP |
| 359 |
DO K=kGrd(J),1,-1 |
| 360 |
DFABS(J,K)=DFABS(J,K)+FLUX(J,1) |
| 361 |
FLUX (J,1)=TAU2(J,K,1)*FLUX(J,1) |
| 362 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,1) |
| 363 |
FLUX (J,1)=FLUX(J,1)+FREFL(J,K) |
| 364 |
ENDDO |
| 365 |
ENDDO |
| 366 |
C |
| 367 |
C 4.3 Net solar radiation = incoming - outgoing |
| 368 |
C |
| 369 |
DO J=1,NGP |
| 370 |
FTOP(J)=FTOP(J)-FLUX(J,1) |
| 371 |
ENDDO |
| 372 |
|
| 373 |
C |
| 374 |
C--- 5. Initialization of longwave radiation model |
| 375 |
C |
| 376 |
C 5.1 Longwave transmissivity: |
| 377 |
C function of layer mass, abs. humidity and cloud cover. |
| 378 |
|
| 379 |
DO J=1,NGP |
| 380 |
ACLOUD(J)=CLOUDC(J)*(ABLCL1+ABLCL2*QCLOUD(J)) |
| 381 |
ENDDO |
| 382 |
|
| 383 |
DO J=1,NGP |
| 384 |
c_FM DELTAP=PSA(J)*DSIG(1) |
| 385 |
DELTAP=DSIG(1)*dpFac(J,1) |
| 386 |
TAU2(J,1,1)=EXP(-DELTAP*ABLWIN) |
| 387 |
TAU2(J,1,2)=EXP(-DELTAP*ABLCO2) |
| 388 |
TAU2(J,1,3)=1. |
| 389 |
TAU2(J,1,4)=1. |
| 390 |
ENDDO |
| 391 |
|
| 392 |
DO K=2,NLEV |
| 393 |
DO J=1,NGP |
| 394 |
c_FM DELTAP=PSA(J)*DSIG(K) |
| 395 |
DELTAP=DSIG(K)*dpFac(J,K) |
| 396 |
IF ( K.GE.ICLTOP(J).AND.K.NE.kGrd(J) ) THEN |
| 397 |
TAU2(J,K,1)=EXP(-DELTAP*(ABLWIN+ACLOUD(J))) |
| 398 |
ELSE |
| 399 |
TAU2(J,K,1)=EXP(-DELTAP*ABLWIN) |
| 400 |
ENDIF |
| 401 |
TAU2(J,K,2)=EXP(-DELTAP*ABLCO2) |
| 402 |
TAU2(J,K,3)=EXP(-DELTAP*ABLWV1*QA(J,K)) |
| 403 |
TAU2(J,K,4)=EXP(-DELTAP*ABLWV2*QA(J,K)) |
| 404 |
ENDDO |
| 405 |
ENDDO |
| 406 |
C |
| 407 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 408 |
#endif /* ALLOW_AIM */ |
| 409 |
|
| 410 |
RETURN |
| 411 |
END |
| 412 |
|
| 413 |
|
| 414 |
SUBROUTINE RADLW (IMODE,TA,TS,ST4S, |
| 415 |
I OZUPP, STRATC, TAU2, |
| 416 |
& FLUX, ST4A, |
| 417 |
& FTOP,FSFC,DFABS, |
| 418 |
I kGrd,bi,bj,myThid) |
| 419 |
C-- |
| 420 |
C-- SUBROUTINE RADLW (IMODE,TA,TS,ST4S, |
| 421 |
C-- & FTOP,FSFC,DFABS) |
| 422 |
C-- |
| 423 |
C-- Purpose: Compute the absorption of longwave radiation |
| 424 |
C-- Input: IMODE = index for operation mode |
| 425 |
C-- -1 : downward flux only |
| 426 |
C-- 0 : downward + upward flux |
| 427 |
C-- +1 : upward flux only |
| 428 |
C-- TA = absolute temperature (3-dim) |
| 429 |
C-- TS = surface temperature [if IMODE=0,1] |
| 430 |
C-- ST4S = surface blackbody emission [if IMODE=1] |
| 431 |
C-- FSFC = FSFC output from RADLW(-1,... ) [if IMODE=1] |
| 432 |
C-- DFABS = DFABS output from RADLW(-1,... ) [if IMODE=1] |
| 433 |
C-- Output: ST4S = surface blackbody emission [if IMODE=0] |
| 434 |
C-- FTOP = outgoing flux of lw rad. at the top [if IMODE=0,1] |
| 435 |
C-- FSFC = downward flux of lw rad. at the sfc. [if IMODE= -1] |
| 436 |
C-- net upw. flux of lw rad. at the sfc. [if IMODE=0,1] |
| 437 |
C-- DFABS = flux of lw rad. absorbed by each atm. layer (3-dim) |
| 438 |
C Input: kGrd = Ground level index (2-dim) |
| 439 |
C bi,bj = tile index |
| 440 |
C myThid = Thread number for this instance of the routine |
| 441 |
C-- |
| 442 |
|
| 443 |
IMPLICIT NONE |
| 444 |
|
| 445 |
C Resolution parameters |
| 446 |
|
| 447 |
C-- size for MITgcm & Physics package : |
| 448 |
#include "AIM_SIZE.h" |
| 449 |
|
| 450 |
#include "EEPARAMS.h" |
| 451 |
|
| 452 |
C Number of radiation bands with tau < 1 |
| 453 |
c INTEGER NBAND |
| 454 |
c PARAMETER ( NBAND=4 ) |
| 455 |
|
| 456 |
C Constants + functions of sigma and latitude |
| 457 |
#include "com_physcon.h" |
| 458 |
|
| 459 |
C Radiation parameters |
| 460 |
#include "com_radcon.h" |
| 461 |
|
| 462 |
C-- Routine arguments: |
| 463 |
INTEGER IMODE |
| 464 |
_RL TA(NGP,NLEV), TS(NGP), ST4S(NGP) |
| 465 |
_RL FTOP(NGP), FSFC(NGP), DFABS(NGP,NLEV) |
| 466 |
_RL OZUPP(NGP), STRATC(NGP) |
| 467 |
_RL TAU2(NGP,NLEV,NBAND), FLUX(NGP,NBAND), ST4A(NGP,NLEV,2) |
| 468 |
|
| 469 |
INTEGER kGrd(NGP) |
| 470 |
INTEGER bi,bj,myThid |
| 471 |
|
| 472 |
#ifdef ALLOW_AIM |
| 473 |
|
| 474 |
C-- Local variables: |
| 475 |
INTEGER K, J, JB |
| 476 |
c INTEGER J0, Jl, I2 |
| 477 |
INTEGER NL1(NGP) |
| 478 |
|
| 479 |
C- jmc: declare all local variables: |
| 480 |
_RL REFSFC, BRAD, EMIS |
| 481 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 482 |
|
| 483 |
DO J=1,NGP |
| 484 |
NL1(J)=kGrd(J)-1 |
| 485 |
ENDDO |
| 486 |
|
| 487 |
REFSFC=1.-EMISFC |
| 488 |
|
| 489 |
IF (IMODE.EQ.1) GO TO 410 |
| 490 |
|
| 491 |
C--- 1. Blackbody emission from atmospheric full and half levels. |
| 492 |
C Temperature is interpolated as a linear function of ln sigma. |
| 493 |
C At the lower boundary, the emission is linearly extrapolated; |
| 494 |
C at the upper boundary, the atmosphere is assumed isothermal. |
| 495 |
|
| 496 |
DO K=1,NLEV |
| 497 |
DO J=1,NGP |
| 498 |
ST4A(J,K,1)=TA(J,K)*TA(J,K) |
| 499 |
ST4A(J,K,1)=SBC*ST4A(J,K,1)*ST4A(J,K,1) |
| 500 |
ENDDO |
| 501 |
ENDDO |
| 502 |
C |
| 503 |
DO K=1,NLEV-1 |
| 504 |
DO J=1,NGP |
| 505 |
ST4A(J,K,2)=TA(J,K)+WVI(K,2)*(TA(J,K+1)-TA(J,K)) |
| 506 |
ST4A(J,K,2)=ST4A(J,K,2)*ST4A(J,K,2) |
| 507 |
ST4A(J,K,2)=SBC*ST4A(J,K,2)*ST4A(J,K,2) |
| 508 |
ENDDO |
| 509 |
ENDDO |
| 510 |
C |
| 511 |
DO J=1,NGP |
| 512 |
c ST4A(J,NLEV,2)=ST4A(J,NLEV,1) |
| 513 |
K=kGrd(J) |
| 514 |
ST4A(J,K,2)=2.*ST4A(J,K,1)-ST4A(J,NL1(J),2) |
| 515 |
ENDDO |
| 516 |
|
| 517 |
C--- 2. Initialization |
| 518 |
C--- (including the stratospheric correction term) |
| 519 |
|
| 520 |
DO J=1,NGP |
| 521 |
FTOP(J) = 0. |
| 522 |
FSFC(J) = STRATC(J) |
| 523 |
DFABS(J,1)=-STRATC(J) |
| 524 |
ENDDO |
| 525 |
|
| 526 |
DO K=2,NLEV |
| 527 |
DO J=1,NGP |
| 528 |
DFABS(J,K)=0. |
| 529 |
ENDDO |
| 530 |
ENDDO |
| 531 |
|
| 532 |
C--- 3. Emission ad absorption of longwave downward flux. |
| 533 |
C Downward emission is an average of the emission from the full level |
| 534 |
C and the half-level below, weighted according to the transmissivity |
| 535 |
C of the layer. |
| 536 |
|
| 537 |
C 3.1 Stratosphere |
| 538 |
|
| 539 |
K=1 |
| 540 |
DO JB=1,2 |
| 541 |
DO J=1,NGP |
| 542 |
BRAD=ST4A(J,K,2)+TAU2(J,K,JB)*(ST4A(J,K,1)-ST4A(J,K,2)) |
| 543 |
EMIS=FBAND(NINT(TA(J,K)),JB)*(1.-TAU2(J,K,JB)) |
| 544 |
FLUX(J,JB)=EMIS*BRAD |
| 545 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,JB) |
| 546 |
ENDDO |
| 547 |
ENDDO |
| 548 |
|
| 549 |
DO JB=3,NBAND |
| 550 |
DO J=1,NGP |
| 551 |
FLUX(J,JB)=0. |
| 552 |
ENDDO |
| 553 |
ENDDO |
| 554 |
|
| 555 |
C 3.2 Troposphere |
| 556 |
|
| 557 |
DO JB=1,NBAND |
| 558 |
DO J=1,NGP |
| 559 |
DO K=2,kGrd(J) |
| 560 |
BRAD=ST4A(J,K,2)+TAU2(J,K,JB)*(ST4A(J,K,1)-ST4A(J,K,2)) |
| 561 |
EMIS=FBAND(NINT(TA(J,K)),JB)*(1.-TAU2(J,K,JB)) |
| 562 |
DFABS(J,K)=DFABS(J,K)+FLUX(J,JB) |
| 563 |
FLUX(J,JB)=TAU2(J,K,JB)*FLUX(J,JB)+EMIS*BRAD |
| 564 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,JB) |
| 565 |
ENDDO |
| 566 |
ENDDO |
| 567 |
ENDDO |
| 568 |
|
| 569 |
DO JB=1,NBAND |
| 570 |
DO J=1,NGP |
| 571 |
FSFC(J)=FSFC(J)+EMISFC*FLUX(J,JB) |
| 572 |
ENDDO |
| 573 |
ENDDO |
| 574 |
|
| 575 |
IF (IMODE.EQ.-1) RETURN |
| 576 |
|
| 577 |
C--- 4. Emission ad absorption of longwave upward flux |
| 578 |
C Upward emission is an average of the emission from the full level |
| 579 |
C and the half-level above, weighted according to the transmissivity |
| 580 |
C of the layer (for the top layer, full-level emission is used). |
| 581 |
C Surface lw emission in "band 0" goes directly into FTOP. |
| 582 |
|
| 583 |
C 4.1 Surface |
| 584 |
|
| 585 |
DO J=1,NGP |
| 586 |
ST4S(J)=TS(J)*TS(J) |
| 587 |
ST4S(J)=SBC*ST4S(J)*ST4S(J) |
| 588 |
ST4S(J)=EMISFC*ST4S(J) |
| 589 |
ENDDO |
| 590 |
|
| 591 |
C Entry point for upward-only mode (IMODE=1) |
| 592 |
410 CONTINUE |
| 593 |
|
| 594 |
DO J=1,NGP |
| 595 |
FSFC(J)=ST4S(J)-FSFC(J) |
| 596 |
FTOP(J)=FTOP(J)+FBAND(NINT(TS(J)),0)*ST4S(J) |
| 597 |
ENDDO |
| 598 |
|
| 599 |
DO JB=1,NBAND |
| 600 |
DO J=1,NGP |
| 601 |
FLUX(J,JB)=FBAND(NINT(TS(J)),JB)*ST4S(J) |
| 602 |
& +REFSFC*FLUX(J,JB) |
| 603 |
ENDDO |
| 604 |
ENDDO |
| 605 |
|
| 606 |
C 4.2 Troposphere |
| 607 |
|
| 608 |
DO JB=1,NBAND |
| 609 |
DO J=1,NGP |
| 610 |
DO K=kGrd(J),2,-1 |
| 611 |
BRAD=ST4A(J,K-1,2)+TAU2(J,K,JB)*(ST4A(J,K,1)-ST4A(J,K-1,2)) |
| 612 |
EMIS=FBAND(NINT(TA(J,K)),JB)*(1.-TAU2(J,K,JB)) |
| 613 |
DFABS(J,K)=DFABS(J,K)+FLUX(J,JB) |
| 614 |
FLUX(J,JB)=TAU2(J,K,JB)*FLUX(J,JB)+EMIS*BRAD |
| 615 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,JB) |
| 616 |
ENDDO |
| 617 |
ENDDO |
| 618 |
ENDDO |
| 619 |
|
| 620 |
C 4.3 Stratosphere |
| 621 |
|
| 622 |
K=1 |
| 623 |
DO JB=1,2 |
| 624 |
DO J=1,NGP |
| 625 |
EMIS=FBAND(NINT(TA(J,K)),JB)*(1.-TAU2(J,K,JB)) |
| 626 |
DFABS(J,K)=DFABS(J,K)+FLUX(J,JB) |
| 627 |
FLUX(J,JB)=TAU2(J,K,JB)*FLUX(J,JB)+EMIS*ST4A(J,K,1) |
| 628 |
DFABS(J,K)=DFABS(J,K)-FLUX(J,JB) |
| 629 |
ENDDO |
| 630 |
ENDDO |
| 631 |
|
| 632 |
C 4.4 Outgoing longwave radiation |
| 633 |
|
| 634 |
DO JB=1,NBAND |
| 635 |
DO J=1,NGP |
| 636 |
FTOP(J)=FTOP(J)+FLUX(J,JB) |
| 637 |
ENDDO |
| 638 |
ENDDO |
| 639 |
|
| 640 |
DO J=1,NGP |
| 641 |
FTOP(J)=FTOP(J)+OZUPP(J) |
| 642 |
ENDDO |
| 643 |
|
| 644 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 645 |
#endif /* ALLOW_AIM */ |
| 646 |
|
| 647 |
RETURN |
| 648 |
END |
| 649 |
|
| 650 |
|
| 651 |
SUBROUTINE RADSET( myThid ) |
| 652 |
|
| 653 |
C-- |
| 654 |
C-- SUBROUTINE RADSET |
| 655 |
C-- |
| 656 |
C-- Purpose: compute energy fractions in LW bands |
| 657 |
C-- as a function of temperature |
| 658 |
C-- Initialized common blocks: RADFIX |
| 659 |
|
| 660 |
IMPLICIT NONE |
| 661 |
|
| 662 |
C Resolution parameters |
| 663 |
|
| 664 |
C-- size for MITgcm & Physics package : |
| 665 |
#include "AIM_SIZE.h" |
| 666 |
|
| 667 |
#include "EEPARAMS.h" |
| 668 |
|
| 669 |
C Radiation constants |
| 670 |
#include "com_radcon.h" |
| 671 |
|
| 672 |
C-- Routine arguments: |
| 673 |
INTEGER myThid |
| 674 |
|
| 675 |
#ifdef ALLOW_AIM |
| 676 |
|
| 677 |
C-- Local variables: |
| 678 |
INTEGER JTEMP, JB |
| 679 |
_RL EPS3 |
| 680 |
|
| 681 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 682 |
|
| 683 |
EPS3=0.95 _d 0 |
| 684 |
|
| 685 |
DO JTEMP=200,320 |
| 686 |
FBAND(JTEMP,0)= EPSLW |
| 687 |
FBAND(JTEMP,2)= 0.148 _d 0 - 3.0 _d -6 *(JTEMP-247)**2 |
| 688 |
FBAND(JTEMP,3)=(0.375 _d 0 - 5.5 _d -6 *(JTEMP-282)**2)*EPS3 |
| 689 |
FBAND(JTEMP,4)= 0.314 _d 0 + 1.0 _d -5 *(JTEMP-315)**2 |
| 690 |
FBAND(JTEMP,1)= 1. _d 0 -(FBAND(JTEMP,0)+FBAND(JTEMP,2) |
| 691 |
& +FBAND(JTEMP,3)+FBAND(JTEMP,4)) |
| 692 |
ENDDO |
| 693 |
|
| 694 |
DO JB=0,NBAND |
| 695 |
DO JTEMP=lwTemp1,199 |
| 696 |
FBAND(JTEMP,JB)=FBAND(200,JB) |
| 697 |
ENDDO |
| 698 |
DO JTEMP=321,lwTemp2 |
| 699 |
FBAND(JTEMP,JB)=FBAND(320,JB) |
| 700 |
ENDDO |
| 701 |
ENDDO |
| 702 |
|
| 703 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 704 |
#endif /* ALLOW_AIM */ |
| 705 |
|
| 706 |
RETURN |
| 707 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph