wrfv2_fire/phys/module_sf_sfclay.F

   1 !WRF:MODEL_LAYER:PHYSICS
   2 !
   3 MODULE module_sf_sfclay
   4
   5  REAL    , PARAMETER ::  VCONVC=1.
   6  REAL    , PARAMETER ::  CZO=0.0185
   7  REAL    , PARAMETER ::  OZO=1.59E-5
   8
   9  REAL,   DIMENSION(0:1000 ),SAVE          :: PSIMTB,PSIHTB
  10
  11 CONTAINS
  12
  13 !-------------------------------------------------------------------
  14    SUBROUTINE SFCLAY(U3D,V3D,T3D,QV3D,P3D,dz8w,                    &
  15                      CP,G,ROVCP,R,XLV,PSFC,CHS,CHS2,CQS2,CPM,      &
  16                      ZNT,UST,PBLH,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH, &
  17                      XLAND,HFX,QFX,LH,TSK,FLHC,FLQC,QGH,QSFC,RMOL, &
  18                      U10,V10,TH2,T2,Q2,                            &
  19                      GZ1OZ0,WSPD,BR,ISFFLX,DX,                     &
  20                      SVP1,SVP2,SVP3,SVPT0,EP1,EP2,                 &
  21                      KARMAN,EOMEG,STBOLT,                          &
  22                      P1000mb,                                      &
  23                      ids,ide, jds,jde, kds,kde,                    &
  24                      ims,ime, jms,jme, kms,kme,                    &
  25                      its,ite, jts,jte, kts,kte,                    &
  26                      uratx,vratx,tratx,                            &
  27                      ustm,ck,cka,cd,cda,isftcflx                   )
  28 !-------------------------------------------------------------------
  29       IMPLICIT NONE
  30 !-------------------------------------------------------------------
  31 !-- U3D         3D u-velocity interpolated to theta points (m/s)
  32 !-- V3D         3D v-velocity interpolated to theta points (m/s)
  33 !-- T3D         temperature (K)
  34 !-- QV3D        3D water vapor mixing ratio (Kg/Kg)
  35 !-- P3D         3D pressure (Pa)
  36 !-- dz8w        dz between full levels (m)
  37 !-- CP          heat capacity at constant pressure for dry air (J/kg/K)
  38 !-- G           acceleration due to gravity (m/s^2)
  39 !-- ROVCP       R/CP
  40 !-- R           gas constant for dry air (J/kg/K)
  41 !-- XLV         latent heat of vaporization for water (J/kg)
  42 !-- PSFC        surface pressure (Pa)
  43 !-- ZNT         roughness length (m)
  44 !-- UST         u* in similarity theory (m/s)
  45 !-- USTM        u* in similarity theory (m/s) without vconv correction
  46 !               used to couple with TKE scheme
  47 !-- PBLH        PBL height from previous time (m)
  48 !-- MAVAIL      surface moisture availability (between 0 and 1)
  49 !-- ZOL         z/L height over Monin-Obukhov length
  50 !-- MOL         T* (similarity theory) (K)
  51 !-- REGIME      flag indicating PBL regime (stable, unstable, etc.)
  52 !-- PSIM        similarity stability function for momentum
  53 !-- PSIH        similarity stability function for heat
  54 !-- XLAND       land mask (1 for land, 2 for water)
  55 !-- HFX         upward heat flux at the surface (W/m^2)
  56 !-- QFX         upward moisture flux at the surface (kg/m^2/s)
  57 !-- LH          net upward latent heat flux at surface (W/m^2)
  58 !-- TSK         surface temperature (K)
  59 !-- FLHC        exchange coefficient for heat (W/m^2/K)
  60 !-- FLQC        exchange coefficient for moisture (kg/m^2/s)
  61 !-- CHS         heat/moisture exchange coefficient for LSM (m/s)
  62 !-- QGH         lowest-level saturated mixing ratio
  63 !-- QSFC        ground saturated mixing ratio
  64 !-- uratx       ratio of surface U to U10
  65 !-- vratx       ratio of surface V to V10
  66 !-- tratx       ratio of surface T to TH2
  67 !-- U10         diagnostic 10m u wind
  68 !-- V10         diagnostic 10m v wind
  69 !-- TH2         diagnostic 2m theta (K)
  70 !-- T2          diagnostic 2m temperature (K)
  71 !-- Q2          diagnostic 2m mixing ratio (kg/kg)
  72 !-- GZ1OZ0      log(z/z0) where z0 is roughness length
  73 !-- WSPD        wind speed at lowest model level (m/s)
  74 !-- BR          bulk Richardson number in surface layer
  75 !-- ISFFLX      isfflx=1 for surface heat and moisture fluxes
  76 !-- DX          horizontal grid size (m)
  77 !-- SVP1        constant for saturation vapor pressure (kPa)
  78 !-- SVP2        constant for saturation vapor pressure (dimensionless)
  79 !-- SVP3        constant for saturation vapor pressure (K)
  80 !-- SVPT0       constant for saturation vapor pressure (K)
  81 !-- EP1         constant for virtual temperature (R_v/R_d - 1) (dimensionless)
  82 !-- EP2         constant for specific humidity calculation
  83 !               (R_d/R_v) (dimensionless)
  84 !-- KARMAN      Von Karman constant
  85 !-- EOMEG       angular velocity of earth's rotation (rad/s)
  86 !-- STBOLT      Stefan-Boltzmann constant (W/m^2/K^4)
  87 !-- ck          enthalpy exchange coeff at 10 meters
  88 !-- cd          momentum exchange coeff at 10 meters
  89 !-- cka         enthalpy exchange coeff at the lowest model level
  90 !-- cda         momentum exchange coeff at the lowest model level
  91 !-- isftcflx    =0, (Charnock and Carlson-Boland); =1, AHW Ck, Cd
  92 !-- ids         start index for i in domain
  93 !-- ide         end index for i in domain
  94 !-- jds         start index for j in domain
  95 !-- jde         end index for j in domain
  96 !-- kds         start index for k in domain
  97 !-- kde         end index for k in domain
  98 !-- ims         start index for i in memory
  99 !-- ime         end index for i in memory
 100 !-- jms         start index for j in memory
 101 !-- jme         end index for j in memory
 102 !-- kms         start index for k in memory
 103 !-- kme         end index for k in memory
 104 !-- its         start index for i in tile
 105 !-- ite         end index for i in tile
 106 !-- jts         start index for j in tile
 107 !-- jte         end index for j in tile
 108 !-- kts         start index for k in tile
 109 !-- kte         end index for k in tile
 110 !-------------------------------------------------------------------
 111       INTEGER,  INTENT(IN )   ::        ids,ide, jds,jde, kds,kde, &
 112                                         ims,ime, jms,jme, kms,kme, &
 113                                         its,ite, jts,jte, kts,kte
 114 !
 115       INTEGER,  INTENT(IN )   ::        ISFFLX
 116       REAL,     INTENT(IN )   ::        SVP1,SVP2,SVP3,SVPT0
 117       REAL,     INTENT(IN )   ::        EP1,EP2,KARMAN,EOMEG,STBOLT
 118       REAL,     INTENT(IN )   ::        P1000mb
 119 !
 120       REAL,     DIMENSION( ims:ime, kms:kme, jms:jme )           , &
 121                 INTENT(IN   )   ::                           dz8w
 122
 123       REAL,     DIMENSION( ims:ime, kms:kme, jms:jme )           , &
 124                 INTENT(IN   )   ::                           QV3D, &
 125                                                               P3D, &
 126                                                               T3D
 127
 128       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 129                 INTENT(IN   )               ::             MAVAIL, &
 130                                                              PBLH, &
 131                                                             XLAND, &
 132                                                               TSK
 133       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 134                 INTENT(OUT  )               ::                U10, &
 135                                                               V10, &
 136                                                               TH2, &
 137                                                                T2, &
 138                                                                Q2, &
 139                                                              QSFC
 140
 141 !
 142       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 143                 INTENT(INOUT)               ::             REGIME, &
 144                                                               HFX, &
 145                                                               QFX, &
 146                                                                LH, &
 147                                                           MOL,RMOL
 148 !m the following 5 are change to memory size
 149 !
 150       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 151                 INTENT(INOUT)   ::                 GZ1OZ0,WSPD,BR, &
 152                                                         PSIM,PSIH
 153
 154       REAL,     DIMENSION( ims:ime, kms:kme, jms:jme )           , &
 155                 INTENT(IN   )   ::                            U3D, &
 156                                                               V3D
 157
 158       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 159                 INTENT(IN   )               ::               PSFC
 160
 161       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 162                 INTENT(INOUT)   ::                            ZNT, &
 163                                                               ZOL, &
 164                                                               UST, &
 165                                                               CPM, &
 166                                                              CHS2, &
 167                                                              CQS2, &
 168                                                               CHS
 169
 170       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 171                 INTENT(INOUT)   ::                      FLHC,FLQC
 172
 173       REAL,     DIMENSION( ims:ime, jms:jme )                    , &
 174                 INTENT(INOUT)   ::                                 &
 175                                                               QGH
 176
 177
 178
 179       REAL,     INTENT(IN   )               ::   CP,G,ROVCP,R,XLV,DX
 180
 181       REAL, OPTIONAL, DIMENSION( ims:ime, jms:jme )              , &
 182                 INTENT(OUT)     ::              uratx,vratx,tratx
 183
 184       REAL, OPTIONAL, DIMENSION( ims:ime, jms:jme )              , &
 185                 INTENT(OUT)     ::              ck,cka,cd,cda,ustm
 186
 187       INTEGER,  OPTIONAL,  INTENT(IN )   ::     ISFTCFLX
 188
 189 ! LOCAL VARS
 190
 191       REAL,     DIMENSION( its:ite ) ::                       U1D, &
 192                                                               V1D, &
 193                                                              QV1D, &
 194                                                               P1D, &
 195                                                               T1D
 196
 197       REAL,     DIMENSION( its:ite ) ::                    dz8w1d
 198
 199       INTEGER ::  I,J
 200
 201       DO J=jts,jte
 202         DO i=its,ite
 203           dz8w1d(I) = dz8w(i,1,j)
 204         ENDDO
 205
 206         DO i=its,ite
 207            U1D(i) =U3D(i,1,j)
 208            V1D(i) =V3D(i,1,j)
 209            QV1D(i)=QV3D(i,1,j)
 210            P1D(i) =P3D(i,1,j)
 211            T1D(i) =T3D(i,1,j)
 212         ENDDO
 213
 214         !  Sending array starting locations of optional variables may cause
 215         !  troubles, so we explicitly change the call.
 216
 217         CALL SFCLAY1D(J,U1D,V1D,T1D,QV1D,P1D,dz8w1d,               &
 218                 CP,G,ROVCP,R,XLV,PSFC(ims,j),CHS(ims,j),CHS2(ims,j),&
 219                 CQS2(ims,j),CPM(ims,j),PBLH(ims,j), RMOL(ims,j),   &
 220                 ZNT(ims,j),UST(ims,j),MAVAIL(ims,j),ZOL(ims,j),    &
 221                 MOL(ims,j),REGIME(ims,j),PSIM(ims,j),PSIH(ims,j),  &
 222                 XLAND(ims,j),HFX(ims,j),QFX(ims,j),TSK(ims,j),     &
 223                 U10(ims,j),V10(ims,j),TH2(ims,j),T2(ims,j),        &
 224                 Q2(ims,j),FLHC(ims,j),FLQC(ims,j),QGH(ims,j),      &
 225                 QSFC(ims,j),LH(ims,j),                             &
 226                 GZ1OZ0(ims,j),WSPD(ims,j),BR(ims,j),ISFFLX,DX,     &
 227                 SVP1,SVP2,SVP3,SVPT0,EP1,EP2,KARMAN,EOMEG,STBOLT,  &
 228                 P1000mb,                                           &
 229                 ids,ide, jds,jde, kds,kde,                         &
 230                 ims,ime, jms,jme, kms,kme,                         &
 231                 its,ite, jts,jte, kts,kte                          &
 232 #if ( EM_CORE == 1 )
 233                 ,uratx(ims,j),vratx(ims,j),tratx(ims,j),           &
 234                 isftcflx,                                          &
 235                 USTM(ims,j),CK(ims,j),CKA(ims,j),                  &
 236                 CD(ims,j),CDA(ims,j)                               &
 237 #endif
 238                                                                    )
 239       ENDDO
 240
 241
 242    END SUBROUTINE SFCLAY
 243
 244
 245 !-------------------------------------------------------------------
 246    SUBROUTINE SFCLAY1D(J,UX,VX,T1D,QV1D,P1D,dz8w1d,                &
 247                      CP,G,ROVCP,R,XLV,PSFCPA,CHS,CHS2,CQS2,CPM,PBLH,RMOL, &
 248                      ZNT,UST,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH,      &
 249                      XLAND,HFX,QFX,TSK,                            &
 250                      U10,V10,TH2,T2,Q2,FLHC,FLQC,QGH,              &
 251                      QSFC,LH,GZ1OZ0,WSPD,BR,ISFFLX,DX,             &
 252                      SVP1,SVP2,SVP3,SVPT0,EP1,EP2,                 &
 253                      KARMAN,EOMEG,STBOLT,                          &
 254                      P1000mb,                                      &
 255                      ids,ide, jds,jde, kds,kde,                    &
 256                      ims,ime, jms,jme, kms,kme,                    &
 257                      its,ite, jts,jte, kts,kte,                    &
 258                      uratx,vratx,tratx,                            &
 259                      isftcflx,                                     &
 260                      ustm,ck,cka,cd,cda                            )
 261 !-------------------------------------------------------------------
 262       IMPLICIT NONE
 263 !-------------------------------------------------------------------
 264       REAL,     PARAMETER     ::        XKA=2.4E-5
 265       REAL,     PARAMETER     ::        PRT=1.
 266
 267       INTEGER,  INTENT(IN )   ::        ids,ide, jds,jde, kds,kde, &
 268                                         ims,ime, jms,jme, kms,kme, &
 269                                         its,ite, jts,jte, kts,kte, &
 270                                         J
 271 !
 272       INTEGER,  INTENT(IN )   ::        ISFFLX
 273       REAL,     INTENT(IN )   ::        SVP1,SVP2,SVP3,SVPT0
 274       REAL,     INTENT(IN )   ::        EP1,EP2,KARMAN,EOMEG,STBOLT
 275       REAL,     INTENT(IN )   ::        P1000mb
 276
 277 !
 278       REAL,     DIMENSION( ims:ime )                             , &
 279                 INTENT(IN   )               ::             MAVAIL, &
 280                                                              PBLH, &
 281                                                             XLAND, &
 282                                                               TSK
 283 !
 284       REAL,     DIMENSION( ims:ime )                             , &
 285                 INTENT(IN   )               ::             PSFCPA
 286
 287       REAL,     DIMENSION( ims:ime )                             , &
 288                 INTENT(INOUT)               ::             REGIME, &
 289                                                               HFX, &
 290                                                               QFX, &
 291                                                          MOL,RMOL
 292 !m the following 5 are changed to memory size---
 293 !
 294       REAL,     DIMENSION( ims:ime )                             , &
 295                 INTENT(INOUT)   ::                 GZ1OZ0,WSPD,BR, &
 296                                                         PSIM,PSIH
 297
 298       REAL,     DIMENSION( ims:ime )                             , &
 299                 INTENT(INOUT)   ::                            ZNT, &
 300                                                               ZOL, &
 301                                                               UST, &
 302                                                               CPM, &
 303                                                              CHS2, &
 304                                                              CQS2, &
 305                                                               CHS
 306
 307       REAL,     DIMENSION( ims:ime )                             , &
 308                 INTENT(INOUT)   ::                      FLHC,FLQC
 309
 310       REAL,     DIMENSION( ims:ime )                             , &
 311                 INTENT(INOUT)   ::                                 &
 312                                                               QGH
 313
 314       REAL,     DIMENSION( ims:ime )                             , &
 315                 INTENT(OUT)     ::                        U10,V10, &
 316                                                 TH2,T2,Q2,QSFC,LH
 317
 318
 319       REAL,     INTENT(IN   )               ::   CP,G,ROVCP,R,XLV,DX
 320
 321 ! MODULE-LOCAL VARIABLES, DEFINED IN SUBROUTINE SFCLAY
 322       REAL,     DIMENSION( its:ite ),  INTENT(IN   )   ::  dz8w1d
 323
 324       REAL,     DIMENSION( its:ite ),  INTENT(IN   )   ::      UX, &
 325                                                                VX, &
 326                                                              QV1D, &
 327                                                               P1D, &
 328                                                               T1D
 329
 330       REAL, OPTIONAL, DIMENSION( ims:ime )                       , &
 331                 INTENT(OUT)     ::              uratx,vratx,tratx
 332
 333       REAL, OPTIONAL, DIMENSION( ims:ime )                       , &
 334                 INTENT(OUT)     ::              ck,cka,cd,cda,ustm
 335
 336       INTEGER,  OPTIONAL,  INTENT(IN )   ::     ISFTCFLX
 337
 338 ! LOCAL VARS
 339
 340       REAL,     DIMENSION( its:ite )        ::                 ZA, &
 341                                                         THVX,ZQKL, &
 342                                                            ZQKLP1, &
 343                                                            THX,QX, &
 344                                                             PSIH2, &
 345                                                             PSIM2, &
 346                                                            PSIH10, &
 347                                                            PSIM10, &
 348                                                            DENOMQ, &
 349                                                             WSPDI, &
 350                                                            GZ2OZ0, &
 351                                                            GZ10OZ0
 352 !
 353       REAL,     DIMENSION( its:ite )        ::                     &
 354                                                       RHOX,GOVRTH, &
 355                                                             TGDSA
 356 !
 357       REAL,     DIMENSION( its:ite)         ::          SCR3,SCR4
 358       REAL,     DIMENSION( its:ite )        ::         THGB, PSFC
 359 !
 360       INTEGER                               ::                 KL
 361
 362       INTEGER ::  N,I,K,KK,L,NZOL,NK,NZOL2,NZOL10
 363
 364       REAL    ::  PL,THCON,TVCON,E1
 365       REAL    ::  ZL,TSKV,DTHVDZ,DTHVM,VCONV,RZOL,RZOL2,RZOL10,ZOL2,ZOL10
 366       REAL    ::  DTG,PSIX,DTTHX,PSIX10,PSIT,PSIT2,PSIQ,PSIQ2,PSIQ10
 367       REAL    ::  FLUXC,VSGD,Z0Q
 368 !-------------------------------------------------------------------
 369       KL=kte
 370
 371       DO i=its,ite
 372 ! PSFC cb
 373          PSFC(I)=PSFCPA(I)/1000.
 374       ENDDO
 375 !
 376 !----CONVERT GROUND TEMPERATURE TO POTENTIAL TEMPERATURE:
 377 !
 378       DO 5 I=its,ite
 379         TGDSA(I)=TSK(I)
 380 ! PSFC cb
 381 !        THGB(I)=TSK(I)*(100./PSFC(I))**ROVCP
 382         THGB(I)=TSK(I)*(P1000mb/PSFCPA(I))**ROVCP
 383     5 CONTINUE
 384 !
 385 !-----DECOUPLE FLUX-FORM VARIABLES TO GIVE U,V,T,THETA,THETA-VIR.,
 386 !     T-VIR., QV, AND QC AT CROSS POINTS AND AT KTAU-1.
 387 !
 388 !     *** NOTE ***
 389 !         THE BOUNDARY WINDS MAY NOT BE ADEQUATELY AFFECTED BY FRICTION,
 390 !         SO USE ONLY INTERIOR VALUES OF UX AND VX TO CALCULATE
 391 !         TENDENCIES.
 392 !
 393    10 CONTINUE
 394
 395 !     DO 24 I=its,ite
 396 !        UX(I)=U1D(I)
 397 !        VX(I)=V1D(I)
 398 !  24 CONTINUE
 399
 400    26 CONTINUE
 401
 402 !.....SCR3(I,K) STORE TEMPERATURE,
 403 !     SCR4(I,K) STORE VIRTUAL TEMPERATURE.
 404
 405       DO 30 I=its,ite
 406 ! PL cb
 407          PL=P1D(I)/1000.
 408          SCR3(I)=T1D(I)
 409 !         THCON=(100./PL)**ROVCP
 410          THCON=(P1000mb*0.001/PL)**ROVCP
 411          THX(I)=SCR3(I)*THCON
 412          SCR4(I)=SCR3(I)
 413          THVX(I)=THX(I)
 414          QX(I)=0.
 415    30 CONTINUE
 416 !
 417       DO I=its,ite
 418          QGH(I)=0.
 419          FLHC(I)=0.
 420          FLQC(I)=0.
 421          CPM(I)=CP
 422       ENDDO
 423 !
 424 !     IF(IDRY.EQ.1)GOTO 80
 425       DO 50 I=its,ite
 426          QX(I)=QV1D(I)
 427          TVCON=(1.+EP1*QX(I))
 428          THVX(I)=THX(I)*TVCON
 429          SCR4(I)=SCR3(I)*TVCON
 430    50 CONTINUE
 431 !
 432       DO 60 I=its,ite
 433         E1=SVP1*EXP(SVP2*(TGDSA(I)-SVPT0)/(TGDSA(I)-SVP3))
 434         QSFC(I)=EP2*E1/(PSFC(I)-E1)
 435 ! QGH CHANGED TO USE LOWEST-LEVEL AIR TEMP CONSISTENT WITH MYJSFC CHANGE
 436 ! Q2SAT = QGH IN LSM
 437         E1=SVP1*EXP(SVP2*(T1D(I)-SVPT0)/(T1D(I)-SVP3))
 438         PL=P1D(I)/1000.
 439         QGH(I)=EP2*E1/(PL-E1)
 440         CPM(I)=CP*(1.+0.8*QX(I))
 441    60 CONTINUE
 442    80 CONTINUE
 443
 444 !-----COMPUTE THE HEIGHT OF FULL- AND HALF-SIGMA LEVELS ABOVE GROUND
 445 !     LEVEL, AND THE LAYER THICKNESSES.
 446
 447       DO 90 I=its,ite
 448         ZQKLP1(I)=0.
 449         RHOX(I)=PSFC(I)*1000./(R*SCR4(I))
 450    90 CONTINUE
 451 !
 452       DO 110 I=its,ite
 453            ZQKL(I)=dz8w1d(I)+ZQKLP1(I)
 454   110 CONTINUE
 455 !
 456       DO 120 I=its,ite
 457          ZA(I)=0.5*(ZQKL(I)+ZQKLP1(I))
 458   120 CONTINUE
 459 !
 460       DO 160 I=its,ite
 461         GOVRTH(I)=G/THX(I)
 462   160 CONTINUE
 463
 464 !-----CALCULATE BULK RICHARDSON NO. OF SURFACE LAYER, ACCORDING TO
 465 !     AKB(1976), EQ(12).
 466
 467       DO 260 I=its,ite
 468         GZ1OZ0(I)=ALOG(ZA(I)/ZNT(I))
 469         GZ2OZ0(I)=ALOG(2./ZNT(I))
 470         GZ10OZ0(I)=ALOG(10./ZNT(I))
 471         IF((XLAND(I)-1.5).GE.0)THEN
 472           ZL=ZNT(I)
 473         ELSE
 474           ZL=0.01
 475         ENDIF
 476         WSPD(I)=SQRT(UX(I)*UX(I)+VX(I)*VX(I))
 477
 478         TSKV=THGB(I)*(1.+EP1*QSFC(I)*MAVAIL(I))
 479         DTHVDZ=(THVX(I)-TSKV)
 480 !  Convective velocity scale Vc and subgrid-scale velocity Vsg
 481 !  following Beljaars (1995, QJRMS) and Mahrt and Sun (1995, MWR)
 482 !                                ... HONG Aug. 2001
 483 !
 484 !       VCONV = 0.25*sqrt(g/tskv*pblh(i)*dthvm)
 485 !      Use Beljaars over land, old MM5 (Wyngaard) formula over water
 486         if (xland(i).lt.1.5) then
 487         fluxc = max(hfx(i)/rhox(i)/cp                    &
 488               + ep1*tskv*qfx(i)/rhox(i),0.)
 489         VCONV = vconvc*(g/tgdsa(i)*pblh(i)*fluxc)**.33
 490         else
 491         IF(-DTHVDZ.GE.0)THEN
 492           DTHVM=-DTHVDZ
 493         ELSE
 494           DTHVM=0.
 495         ENDIF
 496         VCONV = 2.*SQRT(DTHVM)
 497         endif
 498 ! Mahrt and Sun low-res correction
 499         VSGD = 0.32 * (max(dx/5000.-1.,0.))**.33
 500         WSPD(I)=SQRT(WSPD(I)*WSPD(I)+VCONV*VCONV+vsgd*vsgd)
 501         WSPD(I)=AMAX1(WSPD(I),0.1)
 502         BR(I)=GOVRTH(I)*ZA(I)*DTHVDZ/(WSPD(I)*WSPD(I))
 503 !  IF PREVIOUSLY UNSTABLE, DO NOT LET INTO REGIMES 1 AND 2
 504         IF(MOL(I).LT.0.)BR(I)=AMIN1(BR(I),0.0)
 505 !jdf
 506         RMOL(I)=-GOVRTH(I)*DTHVDZ*ZA(I)*KARMAN
 507 !jdf
 508
 509   260 CONTINUE
 510
 511 !
 512 !-----DIAGNOSE BASIC PARAMETERS FOR THE APPROPRIATED STABILITY CLASS:
 513 !
 514 !
 515 !     THE STABILITY CLASSES ARE DETERMINED BY BR (BULK RICHARDSON NO.)
 516 !     AND HOL (HEIGHT OF PBL/MONIN-OBUKHOV LENGTH).
 517 !
 518 !     CRITERIA FOR THE CLASSES ARE AS FOLLOWS:
 519 !
 520 !        1. BR .GE. 0.2;
 521 !               REPRESENTS NIGHTTIME STABLE CONDITIONS (REGIME=1),
 522 !
 523 !        2. BR .LT. 0.2 .AND. BR .GT. 0.0;
 524 !               REPRESENTS DAMPED MECHANICAL TURBULENT CONDITIONS
 525 !               (REGIME=2),
 526 !
 527 !        3. BR .EQ. 0.0
 528 !               REPRESENTS FORCED CONVECTION CONDITIONS (REGIME=3),
 529 !
 530 !        4. BR .LT. 0.0
 531 !               REPRESENTS FREE CONVECTION CONDITIONS (REGIME=4).
 532 !
 533 !CCCCC
 534
 535       DO 320 I=its,ite
 536 !CCCCC
 537 !CC     REMOVE REGIME 3 DEPENDENCE ON PBL HEIGHT
 538 !CC          IF(BR(I).LT.0..AND.HOL(I,J).GT.1.5)GOTO 310
 539         IF(BR(I).LT.0.)GOTO 310
 540 !
 541 !-----CLASS 1; STABLE (NIGHTTIME) CONDITIONS:
 542 !
 543         IF(BR(I).LT.0.2)GOTO 270
 544         REGIME(I)=1.
 545         PSIM(I)=-10.*GZ1OZ0(I)
 546 !    LOWER LIMIT ON PSI IN STABLE CONDITIONS
 547         PSIM(I)=AMAX1(PSIM(I),-10.)
 548         PSIH(I)=PSIM(I)
 549         PSIM10(I)=10./ZA(I)*PSIM(I)
 550         PSIM10(I)=AMAX1(PSIM10(I),-10.)
 551         PSIH10(I)=PSIM10(I)
 552         PSIM2(I)=2./ZA(I)*PSIM(I)
 553         PSIM2(I)=AMAX1(PSIM2(I),-10.)
 554         PSIH2(I)=PSIM2(I)
 555
 556 !       1.0 over Monin-Obukhov length
 557         IF(UST(I).LT.0.01)THEN
 558            RMOL(I)=BR(I)*GZ1OZ0(I) !ZA/L
 559         ELSE
 560            RMOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I)) !ZA/L
 561         ENDIF
 562         RMOL(I)=AMIN1(RMOL(I),9.999) ! ZA/L
 563         RMOL(I) = RMOL(I)/ZA(I) !1.0/L
 564
 565         GOTO 320
 566 !
 567 !-----CLASS 2; DAMPED MECHANICAL TURBULENCE:
 568 !
 569   270   IF(BR(I).EQ.0.0)GOTO 280
 570         REGIME(I)=2.
 571         PSIM(I)=-5.0*BR(I)*GZ1OZ0(I)/(1.1-5.0*BR(I))
 572 !    LOWER LIMIT ON PSI IN STABLE CONDITIONS
 573         PSIM(I)=AMAX1(PSIM(I),-10.)
 574 !.....AKB(1976), EQ(16).
 575         PSIH(I)=PSIM(I)
 576         PSIM10(I)=10./ZA(I)*PSIM(I)
 577         PSIM10(I)=AMAX1(PSIM10(I),-10.)
 578         PSIH10(I)=PSIM10(I)
 579         PSIM2(I)=2./ZA(I)*PSIM(I)
 580         PSIM2(I)=AMAX1(PSIM2(I),-10.)
 581         PSIH2(I)=PSIM2(I)
 582
 583         ! Linear form: PSIM = -0.5*ZA/L; e.g, see eqn 16 of
 584         ! Blackadar, Modeling the nocturnal boundary layer, Preprints,
 585         ! Third Symposium on Atmospheric Turbulence Diffusion and Air Quality,
 586         ! Raleigh, NC, 1976
 587         ZOL(I) = BR(I)*GZ1OZ0(I)/(1.00001-5.0*BR(I))
 588
 589         if ( ZOL(I) .GT. 0.5 ) then ! linear form ok
 590            ! Holtslag and de Bruin, J. App. Meteor 27, 689-704, 1988;
 591            ! see also, Launiainen, Boundary-Layer Meteor 76,165-179, 1995
 592            ! Eqn (8) of Launiainen, 1995
 593            ZOL(I) = ( 1.89*GZ1OZ0(I) + 44.2 ) * BR(I)*BR(I)    &
 594                 + ( 1.18*GZ1OZ0(I) - 1.37 ) * BR(I)
 595            ZOL(I)=AMIN1(ZOL(I),9.999)
 596         end if
 597
 598         ! 1.0 over Monin-Obukhov length
 599         RMOL(I)= ZOL(I)/ZA(I)
 600
 601         GOTO 320
 602 !
 603 !-----CLASS 3; FORCED CONVECTION:
 604 !
 605   280   REGIME(I)=3.
 606         PSIM(I)=0.0
 607         PSIH(I)=PSIM(I)
 608         PSIM10(I)=0.
 609         PSIH10(I)=PSIM10(I)
 610         PSIM2(I)=0.
 611         PSIH2(I)=PSIM2(I)
 612
 613
 614         IF(UST(I).LT.0.01)THEN
 615           ZOL(I)=BR(I)*GZ1OZ0(I)
 616         ELSE
 617           ZOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I))
 618         ENDIF
 619
 620         RMOL(I) = ZOL(I)/ZA(I)
 621
 622         GOTO 320
 623 !
 624 !-----CLASS 4; FREE CONVECTION:
 625 !
 626   310   CONTINUE
 627         REGIME(I)=4.
 628         IF(UST(I).LT.0.01)THEN
 629           ZOL(I)=BR(I)*GZ1OZ0(I)
 630         ELSE
 631           ZOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I))
 632         ENDIF
 633         ZOL10=10./ZA(I)*ZOL(I)
 634         ZOL2=2./ZA(I)*ZOL(I)
 635         ZOL(I)=AMIN1(ZOL(I),0.)
 636         ZOL(I)=AMAX1(ZOL(I),-9.9999)
 637         ZOL10=AMIN1(ZOL10,0.)
 638         ZOL10=AMAX1(ZOL10,-9.9999)
 639         ZOL2=AMIN1(ZOL2,0.)
 640         ZOL2=AMAX1(ZOL2,-9.9999)
 641         NZOL=INT(-ZOL(I)*100.)
 642         RZOL=-ZOL(I)*100.-NZOL
 643         NZOL10=INT(-ZOL10*100.)
 644         RZOL10=-ZOL10*100.-NZOL10
 645         NZOL2=INT(-ZOL2*100.)
 646         RZOL2=-ZOL2*100.-NZOL2
 647         PSIM(I)=PSIMTB(NZOL)+RZOL*(PSIMTB(NZOL+1)-PSIMTB(NZOL))
 648         PSIH(I)=PSIHTB(NZOL)+RZOL*(PSIHTB(NZOL+1)-PSIHTB(NZOL))
 649         PSIM10(I)=PSIMTB(NZOL10)+RZOL10*(PSIMTB(NZOL10+1)-PSIMTB(NZOL10))
 650         PSIH10(I)=PSIHTB(NZOL10)+RZOL10*(PSIHTB(NZOL10+1)-PSIHTB(NZOL10))
 651         PSIM2(I)=PSIMTB(NZOL2)+RZOL2*(PSIMTB(NZOL2+1)-PSIMTB(NZOL2))
 652         PSIH2(I)=PSIHTB(NZOL2)+RZOL2*(PSIHTB(NZOL2+1)-PSIHTB(NZOL2))
 653
 654 !---LIMIT PSIH AND PSIM IN THE CASE OF THIN LAYERS AND HIGH ROUGHNESS
 655 !---  THIS PREVENTS DENOMINATOR IN FLUXES FROM GETTING TOO SMALL
 656 !       PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I))
 657 !       PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I))
 658         PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I))
 659         PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I))
 660         PSIH2(I)=AMIN1(PSIH2(I),0.9*GZ2OZ0(I))
 661         PSIM10(I)=AMIN1(PSIM10(I),0.9*GZ10OZ0(I))
 662 ! AHW: mods to compute ck, cd
 663         PSIH10(I)=AMIN1(PSIH10(I),0.9*GZ10OZ0(I))
 664
 665         RMOL(I) = ZOL(I)/ZA(I)
 666
 667   320 CONTINUE
 668 !
 669 !-----COMPUTE THE FRICTIONAL VELOCITY:
 670 !     ZA(1982) EQS(2.60),(2.61).
 671 !
 672       DO 330 I=its,ite
 673         DTG=THX(I)-THGB(I)
 674         PSIX=GZ1OZ0(I)-PSIM(I)
 675         PSIX10=GZ10OZ0(I)-PSIM10(I)
 676 !     LOWER LIMIT ADDED TO PREVENT LARGE FLHC IN SOIL MODEL
 677 !     ACTIVATES IN UNSTABLE CONDITIONS WITH THIN LAYERS OR HIGH Z0
 678         PSIT=AMAX1(GZ1OZ0(I)-PSIH(I),2.)
 679
 680         IF((XLAND(I)-1.5).GE.0)THEN
 681           ZL=ZNT(I)
 682         ELSE
 683           ZL=0.01
 684         ENDIF
 685         PSIQ=ALOG(KARMAN*UST(I)*ZA(I)/XKA+ZA(I)/ZL)-PSIH(I)
 686         PSIT2=GZ2OZ0(I)-PSIH2(I)
 687         PSIQ2=ALOG(KARMAN*UST(I)*2./XKA+2./ZL)-PSIH2(I)
 688 ! AHW: mods to compute ck, cd
 689         PSIQ10=ALOG(KARMAN*UST(I)*10./XKA+10./ZL)-PSIH10(I)
 690         IF ( PRESENT(ISFTCFLX) ) THEN
 691            IF ( ISFTCFLX.EQ.1 .AND. (XLAND(I)-1.5).GE.0. ) THEN
 692               Z0Q = 1.e-4 + 1.e-3*(MAX(0.,UST(I)-1.))**2
 693 !             Z0Q = 0.62*1.5E-5/UST(I) + 1.E-3*(MAX(0.,UST(I)-1.))**2
 694               PSIQ=ALOG(ZA(I)/Z0Q)-PSIH(I)
 695               PSIT=PSIQ
 696               PSIQ2=ALOG(2./Z0Q)-PSIH2(I)
 697               PSIQ10=ALOG(10./Z0Q)-PSIH10(I)
 698               PSIT2=PSIQ2
 699            ENDIF
 700         ENDIF
 701         IF(PRESENT(ck) .and. PRESENT(cd) .and. PRESENT(cka) .and. PRESENT(cda)) THEN
 702            Ck(I)=(karman/psix10)*(karman/psiq10)
 703            Cd(I)=(karman/psix10)*(karman/psix10)
 704            Cka(I)=(karman/psix)*(karman/psiq)
 705            Cda(I)=(karman/psix)*(karman/psix)
 706         ENDIF
 707 ! TO PREVENT OSCILLATIONS AVERAGE WITH OLD VALUE
 708         UST(I)=0.5*UST(I)+0.5*KARMAN*WSPD(I)/PSIX
 709 ! TKE coupling: compute ust without vconv for use in tke scheme
 710         WSPDI(I)=SQRT(UX(I)*UX(I)+VX(I)*VX(I))
 711         IF ( PRESENT(USTM) ) THEN
 712         USTM(I)=0.5*USTM(I)+0.5*KARMAN*WSPDI(I)/PSIX
 713         ENDIF
 714         U10(I)=UX(I)*PSIX10/PSIX
 715         V10(I)=VX(I)*PSIX10/PSIX
 716         TH2(I)=THGB(I)+DTG*PSIT2/PSIT
 717         Q2(I)=QSFC(I)+(QX(I)-QSFC(I))*PSIQ2/PSIQ
 718 !        T2(I) = TH2(I)*(PSFC(I)/100.)**ROVCP
 719         T2(I) = TH2(I)*(PSFCPA(I)/P1000mb)**ROVCP
 720 !       LATER Q2 WILL BE OVERWRITTEN FOR LAND POINTS IN SURFCE
 721 !       QA2(I,J) = Q2(I)
 722 !       UA10(I,J) = U10(I)
 723 !       VA10(I,J) = V10(I)
 724 !       write(*,1002)UST(I),KARMAN*WSPD(I),PSIX,KARMAN*WSPD(I)/PSIX
 725 !
 726         IF(PRESENT(uratx) .and. PRESENT(vratx) .and. PRESENT(tratx))THEN
 727           IF(ABS(U10(I)) .GT. 1.E-10) THEN
 728              uratx(I) = UX(I)/U10(I)
 729           ELSE
 730              uratx(I) = 1.2
 731           END IF
 732           IF(ABS(V10(I)) .GT. 1.E-10) THEN
 733              vratx(I) = VX(I)/V10(I)
 734           ELSE
 735              vratx(I) = 1.2
 736           END IF
 737           tratx(I) = THX(I)/TH2(I)
 738         ENDIF
 739
 740         IF((XLAND(I)-1.5).LT.0.)THEN
 741           UST(I)=AMAX1(UST(I),0.1)
 742         ENDIF
 743         MOL(I)=KARMAN*DTG/PSIT/PRT
 744         DENOMQ(I)=PSIQ
 745   330 CONTINUE
 746 !
 747   335 CONTINUE
 748
 749 !-----COMPUTE THE SURFACE SENSIBLE AND LATENT HEAT FLUXES:
 750
 751       DO i=its,ite
 752         QFX(i)=0.
 753         HFX(i)=0.
 754       ENDDO
 755
 756       IF (ISFFLX.EQ.0) GOTO 410
 757
 758 !-----OVER WATER, ALTER ROUGHNESS LENGTH (ZNT) ACCORDING TO WIND (UST).
 759
 760       DO 360 I=its,ite
 761         IF((XLAND(I)-1.5).GE.0)THEN
 762           ZNT(I)=CZO*UST(I)*UST(I)/G+OZO
 763 ! AHW: change roughness length, and hence the drag coefficients Ck and Cd
 764           IF ( PRESENT(ISFTCFLX) ) THEN
 765              IF ( ISFTCFLX.EQ.1 ) THEN
 766                 ZNT(I)=10.*exp(-9.*UST(I)**(-.3333))
 767                 ZNT(I)=MIN(ZNT(I),2.85e-3)
 768                 ZNT(I)=ZNT(I) + 0.11*1.5E-5/AMAX1(UST(I),0.01)
 769 !               ZNT(I)=MAX(ZNT(I),1.27e-7)
 770              ENDIF
 771           ENDIF
 772           ZL = ZNT(I)
 773         ELSE
 774           ZL = 0.01
 775         ENDIF
 776         FLQC(I)=RHOX(I)*MAVAIL(I)*UST(I)*KARMAN/DENOMQ(I)
 777 !       FLQC(I)=RHOX(I)*MAVAIL(I)*UST(I)*KARMAN/(   &
 778 !               ALOG(KARMAN*UST(I)*ZA(I)/XKA+ZA(I)/ZL)-PSIH(I))
 779         DTTHX=ABS(THX(I)-THGB(I))
 780         IF(DTTHX.GT.1.E-5)THEN
 781           FLHC(I)=CPM(I)*RHOX(I)*UST(I)*MOL(I)/(THX(I)-THGB(I))
 782 !         write(*,1001)FLHC(I),CPM(I),RHOX(I),UST(I),MOL(I),THX(I),THGB(I),I
 783  1001   format(f8.5,2x,f12.7,2x,f12.10,2x,f12.10,2x,f13.10,2x,f12.8,f12.8,2x,i3)
 784         ELSE
 785           FLHC(I)=0.
 786         ENDIF
 787   360 CONTINUE
 788
 789 !
 790 !-----COMPUTE SURFACE MOIST FLUX:
 791 !
 792 !     IF(IDRY.EQ.1)GOTO 390
 793 !
 794       DO 370 I=its,ite
 795         QFX(I)=FLQC(I)*(QSFC(I)-QX(I))
 796         QFX(I)=AMAX1(QFX(I),0.)
 797         LH(I)=XLV*QFX(I)
 798   370 CONTINUE
 799
 800 !-----COMPUTE SURFACE HEAT FLUX:
 801 !
 802   390 CONTINUE
 803       DO 400 I=its,ite
 804         IF(XLAND(I)-1.5.GT.0.)THEN
 805           HFX(I)=FLHC(I)*(THGB(I)-THX(I))
 806         ELSEIF(XLAND(I)-1.5.LT.0.)THEN
 807           HFX(I)=FLHC(I)*(THGB(I)-THX(I))
 808           HFX(I)=AMAX1(HFX(I),-250.)
 809         ENDIF
 810   400 CONTINUE
 811
 812       DO I=its,ite
 813          IF((XLAND(I)-1.5).GE.0)THEN
 814            ZL=ZNT(I)
 815          ELSE
 816            ZL=0.01
 817          ENDIF
 818          CHS(I)=UST(I)*KARMAN/(ALOG(KARMAN*UST(I)*ZA(I) &
 819                 /XKA+ZA(I)/ZL)-PSIH(I))
 820 !        GZ2OZ0(I)=ALOG(2./ZNT(I))
 821 !        PSIM2(I)=-10.*GZ2OZ0(I)
 822 !        PSIM2(I)=AMAX1(PSIM2(I),-10.)
 823 !        PSIH2(I)=PSIM2(I)
 824          CQS2(I)=UST(I)*KARMAN/(ALOG(KARMAN*UST(I)*2.0  &
 825                /XKA+2.0/ZL)-PSIH2(I))
 826          CHS2(I)=UST(I)*KARMAN/(GZ2OZ0(I)-PSIH2(I))
 827       ENDDO
 828
 829   410 CONTINUE
 830 !jdf
 831 !     DO I=its,ite
 832 !       IF(UST(I).GE.0.1) THEN
 833 !         RMOL(I)=RMOL(I)*(-FLHC(I))/(UST(I)*UST(I)*UST(I))
 834 !       ELSE
 835 !         RMOL(I)=RMOL(I)*(-FLHC(I))/(0.1*0.1*0.1)
 836 !       ENDIF
 837 !     ENDDO
 838 !jdf
 839
 840 !
 841    END SUBROUTINE SFCLAY1D
 842
 843 !====================================================================
 844    SUBROUTINE sfclayinit( allowed_to_read )
 845
 846    LOGICAL , INTENT(IN)      ::      allowed_to_read
 847    INTEGER                   ::      N
 848    REAL                      ::      ZOLN,X,Y
 849
 850    DO N=0,1000
 851       ZOLN=-FLOAT(N)*0.01
 852       X=(1-16.*ZOLN)**0.25
 853       PSIMTB(N)=2*ALOG(0.5*(1+X))+ALOG(0.5*(1+X*X))- &
 854                 2.*ATAN(X)+2.*ATAN(1.)
 855       Y=(1-16*ZOLN)**0.5
 856       PSIHTB(N)=2*ALOG(0.5*(1+Y))
 857    ENDDO
 858
 859    END SUBROUTINE sfclayinit
 860
 861 !-------------------------------------------------------------------
 862
 863 END MODULE module_sf_sfclay