| 1 | SUBROUTINE orodrag( nlon,nlev |
|---|
| 2 | i , kgwd, kdx, ktest |
|---|
| 3 | r , ptsphy |
|---|
| 4 | r , paphm1,papm1,pgeom1,pn2m1,ptm1,pum1,pvm1 |
|---|
| 5 | r , pmea, pstd, psig, pgam, pthe, ppic, pval |
|---|
| 6 | c outputs |
|---|
| 7 | r , pulow,pvlow |
|---|
| 8 | r , pvom,pvol,pte |
|---|
| 9 | r , blustr,blvstr,pnlow,zeff,ikenvh |
|---|
| 10 | c 3D and temporary outputs |
|---|
| 11 | r , ztau,iknu2,ikbreak) |
|---|
| 12 | |
|---|
| 13 | use dimphy |
|---|
| 14 | IMPLICIT NONE |
|---|
| 15 | |
|---|
| 16 | c |
|---|
| 17 | c |
|---|
| 18 | c**** *orodrag* - does the SSO drag parametrization. |
|---|
| 19 | c |
|---|
| 20 | c purpose. |
|---|
| 21 | c -------- |
|---|
| 22 | c |
|---|
| 23 | c this routine computes the physical tendencies of the |
|---|
| 24 | c prognostic variables u,v and t due to vertical transports by |
|---|
| 25 | c subgridscale orographically excited gravity waves, and to |
|---|
| 26 | c low level blocked flow drag. |
|---|
| 27 | c |
|---|
| 28 | c** interface. |
|---|
| 29 | c ---------- |
|---|
| 30 | c called from *drag_noro*. |
|---|
| 31 | c |
|---|
| 32 | c the routine takes its input from the long-term storage: |
|---|
| 33 | c u,v,t and p at t-1. |
|---|
| 34 | c |
|---|
| 35 | c explicit arguments : |
|---|
| 36 | c -------------------- |
|---|
| 37 | c ==== inputs === |
|---|
| 38 | c nlon----input-I-Total number of horizontal points that get into physics |
|---|
| 39 | c nlev----input-I-Number of vertical levels |
|---|
| 40 | c |
|---|
| 41 | c kgwd- -input-I: Total nb of points where the orography schemes are active |
|---|
| 42 | c ktest--input-I: Flags to indicate active points |
|---|
| 43 | c kdx----input-I: Locate the physical location of an active point. |
|---|
| 44 | c ptsphy--input-R-Time-step (s) |
|---|
| 45 | c paphm1--input-R: pressure at model 1/2 layer |
|---|
| 46 | c papm1---input-R: pressure at model layer |
|---|
| 47 | c pgeom1--input-R: Altitude of layer above ground |
|---|
| 48 | c pn2m1---input-R-Brunt-Vaisala freq.^2 at 1/2 layers |
|---|
| 49 | c ptm1, pum1, pvm1--R-: t, u and v |
|---|
| 50 | c pmea----input-R-Mean Orography (m) |
|---|
| 51 | C pstd----input-R-SSO standard deviation (m) |
|---|
| 52 | c psig----input-R-SSO slope |
|---|
| 53 | c pgam----input-R-SSO Anisotropy |
|---|
| 54 | c pthe----input-R-SSO Angle |
|---|
| 55 | c ppic----input-R-SSO Peacks elevation (m) |
|---|
| 56 | c pval----input-R-SSO Valleys elevation (m) |
|---|
| 57 | |
|---|
| 58 | integer nlon,nlev,kgwd |
|---|
| 59 | real ptsphy |
|---|
| 60 | |
|---|
| 61 | c ==== outputs === |
|---|
| 62 | c pulow, pvlow -output-R: Low-level wind |
|---|
| 63 | c |
|---|
| 64 | c pte -----output-R: T tendency |
|---|
| 65 | c pvom-----output-R: U tendency |
|---|
| 66 | c pvol-----output-R: V tendency |
|---|
| 67 | c |
|---|
| 68 | c |
|---|
| 69 | c Implicit Arguments: |
|---|
| 70 | c =================== |
|---|
| 71 | c |
|---|
| 72 | c klon-common-I: Number of points seen by the physics |
|---|
| 73 | c klev-common-I: Number of vertical layers |
|---|
| 74 | c |
|---|
| 75 | c method. |
|---|
| 76 | c ------- |
|---|
| 77 | c |
|---|
| 78 | c externals. |
|---|
| 79 | c ---------- |
|---|
| 80 | Coff integer ismin, ismax |
|---|
| 81 | Coff external ismin, ismax |
|---|
| 82 | c |
|---|
| 83 | c reference. |
|---|
| 84 | c ---------- |
|---|
| 85 | c |
|---|
| 86 | c author. |
|---|
| 87 | c ------- |
|---|
| 88 | c m.miller + b.ritter e.c.m.w.f. 15/06/86. |
|---|
| 89 | c |
|---|
| 90 | c f.lott + m. miller e.c.m.w.f. 22/11/94 |
|---|
| 91 | c----------------------------------------------------------------------- |
|---|
| 92 | c |
|---|
| 93 | c |
|---|
| 94 | #include "YOMCST.h" |
|---|
| 95 | #include "YOEGWD.h" |
|---|
| 96 | |
|---|
| 97 | c----------------------------------------------------------------------- |
|---|
| 98 | c |
|---|
| 99 | c* 0.1 arguments |
|---|
| 100 | c --------- |
|---|
| 101 | c |
|---|
| 102 | c |
|---|
| 103 | real pte(nlon,nlev), |
|---|
| 104 | * pvol(nlon,nlev), |
|---|
| 105 | * pvom(nlon,nlev), |
|---|
| 106 | * pulow(nlon), |
|---|
| 107 | * pvlow(nlon) |
|---|
| 108 | real pum1(nlon,nlev), |
|---|
| 109 | * pvm1(nlon,nlev), |
|---|
| 110 | * ptm1(nlon,nlev), |
|---|
| 111 | * pmea(nlon),pstd(nlon),psig(nlon), |
|---|
| 112 | * pgam(nlon),pthe(nlon),ppic(nlon),pval(nlon), |
|---|
| 113 | * pgeom1(nlon,nlev),pn2m1(nlon,nlev), |
|---|
| 114 | * papm1(nlon,nlev), |
|---|
| 115 | * paphm1(nlon,nlev+1), |
|---|
| 116 | * pnlow(nlon), ! low level stability |
|---|
| 117 | * blustr(nlon),blvstr(nlon), ! blocked stress |
|---|
| 118 | * zeff(nlon) ! effective height |
|---|
| 119 | |
|---|
| 120 | c |
|---|
| 121 | integer kdx(nlon),ktest(nlon) |
|---|
| 122 | c----------------------------------------------------------------------- |
|---|
| 123 | c |
|---|
| 124 | c* 0.2 local arrays |
|---|
| 125 | c ------------ |
|---|
| 126 | integer isect(klon), |
|---|
| 127 | * icrit(klon), |
|---|
| 128 | * ikcrith(klon), |
|---|
| 129 | * ikenvh(klon), |
|---|
| 130 | * iknu(klon), |
|---|
| 131 | * iknu2(klon), |
|---|
| 132 | * ikbreak(klon), |
|---|
| 133 | * ikcrit(klon), |
|---|
| 134 | * ikhlim(klon) |
|---|
| 135 | c |
|---|
| 136 | real ztau(klon,klev+1), |
|---|
| 137 | * zstab(klon,klev+1), |
|---|
| 138 | * zvph(klon,klev+1), |
|---|
| 139 | * zrho(klon,klev+1), |
|---|
| 140 | * zri(klon,klev+1), |
|---|
| 141 | * zpsi(klon,klev+1), |
|---|
| 142 | * zzdep(klon,klev) |
|---|
| 143 | real zdudt(klon), |
|---|
| 144 | * zdvdt(klon), |
|---|
| 145 | * zdtdt(klon), |
|---|
| 146 | * zdedt(klon), |
|---|
| 147 | * zvidis(klon), |
|---|
| 148 | * ztfr(klon), |
|---|
| 149 | * znu(klon), |
|---|
| 150 | * zd1(klon), |
|---|
| 151 | * zd2(klon), |
|---|
| 152 | * zdmod(klon) |
|---|
| 153 | |
|---|
| 154 | |
|---|
| 155 | c local quantities: |
|---|
| 156 | |
|---|
| 157 | integer jl,jk,ji |
|---|
| 158 | real ztmst,zdelp,ztemp,zforc,ztend,rover |
|---|
| 159 | real zb,zc,zconb,zabsv,zzd1,ratio,zbet,zust,zvst,zdis |
|---|
| 160 | |
|---|
| 161 | c |
|---|
| 162 | c------------------------------------------------------------------ |
|---|
| 163 | c |
|---|
| 164 | c* 1. initialization |
|---|
| 165 | c -------------- |
|---|
| 166 | c |
|---|
| 167 | c print *,' in orodrag' |
|---|
| 168 | 100 continue |
|---|
| 169 | c |
|---|
| 170 | c ------------------------------------------------------------------ |
|---|
| 171 | c |
|---|
| 172 | c* 1.1 computational constants |
|---|
| 173 | c ----------------------- |
|---|
| 174 | c |
|---|
| 175 | 110 continue |
|---|
| 176 | c |
|---|
| 177 | c ztmst=twodt |
|---|
| 178 | c if(nstep.eq.nstart) ztmst=0.5*twodt |
|---|
| 179 | ztmst=ptsphy |
|---|
| 180 | c ------------------------------------------------------------------ |
|---|
| 181 | c |
|---|
| 182 | 120 continue |
|---|
| 183 | c |
|---|
| 184 | c ------------------------------------------------------------------ |
|---|
| 185 | c |
|---|
| 186 | c* 1.3 check whether row contains point for printing |
|---|
| 187 | c --------------------------------------------- |
|---|
| 188 | c |
|---|
| 189 | 130 continue |
|---|
| 190 | c |
|---|
| 191 | c ------------------------------------------------------------------ |
|---|
| 192 | c |
|---|
| 193 | c* 2. precompute basic state variables. |
|---|
| 194 | c* ---------- ----- ----- ---------- |
|---|
| 195 | c* define low level wind, project winds in plane of |
|---|
| 196 | c* low level wind, determine sector in which to take |
|---|
| 197 | c* the variance and set indicator for critical levels. |
|---|
| 198 | c |
|---|
| 199 | |
|---|
| 200 | 200 continue |
|---|
| 201 | c |
|---|
| 202 | do jk=1,klev |
|---|
| 203 | zstab(:,jk) = pn2m1(:,jk) |
|---|
| 204 | enddo |
|---|
| 205 | c |
|---|
| 206 | call orosetup |
|---|
| 207 | * ( nlon, nlev , ktest |
|---|
| 208 | * , ikcrit, ikcrith, icrit, isect, ikhlim, ikenvh,iknu,iknu2 |
|---|
| 209 | * , ikbreak |
|---|
| 210 | * , paphm1, papm1 , pum1 , pvm1 , ptm1 , pgeom1, zstab, pstd |
|---|
| 211 | * , zrho , zri , ztau , zvph , zpsi, zzdep |
|---|
| 212 | * , pulow, pvlow |
|---|
| 213 | * , pthe,pgam,pmea,ppic,pval,znu ,zd1, zd2, zdmod ) |
|---|
| 214 | |
|---|
| 215 | |
|---|
| 216 | pnlow(:) = sqrt(zstab(:,klev+1)) |
|---|
| 217 | |
|---|
| 218 | c |
|---|
| 219 | c |
|---|
| 220 | c |
|---|
| 221 | c*********************************************************** |
|---|
| 222 | c |
|---|
| 223 | c |
|---|
| 224 | c* 3. compute low level stresses using subcritical and |
|---|
| 225 | c* supercritical forms.computes anisotropy coefficient |
|---|
| 226 | c* as measure of orographic twodimensionality. |
|---|
| 227 | c |
|---|
| 228 | 300 continue |
|---|
| 229 | c |
|---|
| 230 | call gwstress |
|---|
| 231 | * ( nlon , nlev |
|---|
| 232 | * , ikcrit, isect, ikhlim, ktest, ikcrith, icrit, ikenvh, iknu |
|---|
| 233 | * , zrho , zstab, zvph , pstd, psig, pmea, ppic, pval |
|---|
| 234 | * , ztfr , ztau |
|---|
| 235 | * , pgeom1,pgam,zd1,zd2,zdmod,znu,zeff) |
|---|
| 236 | |
|---|
| 237 | c |
|---|
| 238 | c |
|---|
| 239 | c* 4. compute stress profile including |
|---|
| 240 | c trapped waves, wave breaking, |
|---|
| 241 | c linear decay in stratosphere. |
|---|
| 242 | c |
|---|
| 243 | 400 continue |
|---|
| 244 | c |
|---|
| 245 | c |
|---|
| 246 | |
|---|
| 247 | call gwprofil |
|---|
| 248 | * ( nlon , nlev |
|---|
| 249 | * , kgwd , kdx , ktest |
|---|
| 250 | * , ikcrit, ikcrith, icrit , ikenvh, iknu |
|---|
| 251 | * ,iknu2 , ikbreak, paphm1, zrho , zstab , ztfr , zvph |
|---|
| 252 | * , zri , ztau |
|---|
| 253 | |
|---|
| 254 | * , zdmod , znu , psig , pgam , pstd , ppic , pval) |
|---|
| 255 | |
|---|
| 256 | c |
|---|
| 257 | c* 5. Compute tendencies from waves stress profile. |
|---|
| 258 | c Compute low level blocked flow drag. |
|---|
| 259 | c* -------------------------------------------- |
|---|
| 260 | c |
|---|
| 261 | 500 continue |
|---|
| 262 | |
|---|
| 263 | |
|---|
| 264 | c |
|---|
| 265 | c explicit solution at all levels for the gravity wave |
|---|
| 266 | c implicit solution for the blocked levels |
|---|
| 267 | |
|---|
| 268 | do 510 jl=kidia,kfdia |
|---|
| 269 | zvidis(jl)=0.0 |
|---|
| 270 | zdudt(jl)=0.0 |
|---|
| 271 | zdvdt(jl)=0.0 |
|---|
| 272 | zdtdt(jl)=0.0 |
|---|
| 273 | blustr(jl)=0.0 |
|---|
| 274 | blvstr(jl)=0.0 |
|---|
| 275 | 510 continue |
|---|
| 276 | c |
|---|
| 277 | |
|---|
| 278 | do 524 jk=1,klev |
|---|
| 279 | c |
|---|
| 280 | |
|---|
| 281 | C WAVE STRESS |
|---|
| 282 | C------------- |
|---|
| 283 | c |
|---|
| 284 | c |
|---|
| 285 | do 523 ji=kidia,kfdia |
|---|
| 286 | |
|---|
| 287 | if(ktest(ji).eq.1) then |
|---|
| 288 | |
|---|
| 289 | zdelp=paphm1(ji,jk+1)-paphm1(ji,jk) |
|---|
| 290 | ztemp=-rg*(ztau(ji,jk+1)-ztau(ji,jk))/(zvph(ji,klev+1)*zdelp) |
|---|
| 291 | |
|---|
| 292 | zdudt(ji)=(pulow(ji)*zd1(ji)-pvlow(ji)*zd2(ji))*ztemp/zdmod(ji) |
|---|
| 293 | zdvdt(ji)=(pvlow(ji)*zd1(ji)+pulow(ji)*zd2(ji))*ztemp/zdmod(ji) |
|---|
| 294 | c |
|---|
| 295 | c Control Overshoots |
|---|
| 296 | c |
|---|
| 297 | |
|---|
| 298 | if(jk.ge.ntop)then |
|---|
| 299 | rover=0.10 |
|---|
| 300 | if(abs(zdudt(ji)).gt.rover*abs(pum1(ji,jk))/ztmst) |
|---|
| 301 | C zdudt(ji)=rover*abs(pum1(ji,jk))/ztmst* |
|---|
| 302 | C zdudt(ji)/(abs(zdudt(ji))+1.E-10) |
|---|
| 303 | if(abs(zdvdt(ji)).gt.rover*abs(pvm1(ji,jk))/ztmst) |
|---|
| 304 | C zdvdt(ji)=rover*abs(pvm1(ji,jk))/ztmst* |
|---|
| 305 | C zdvdt(ji)/(abs(zdvdt(ji))+1.E-10) |
|---|
| 306 | endif |
|---|
| 307 | |
|---|
| 308 | rover=0.25 |
|---|
| 309 | zforc=sqrt(zdudt(ji)**2+zdvdt(ji)**2) |
|---|
| 310 | ztend=sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/ztmst |
|---|
| 311 | |
|---|
| 312 | if(zforc.ge.rover*ztend)then |
|---|
| 313 | zdudt(ji)=rover*ztend/zforc*zdudt(ji) |
|---|
| 314 | zdvdt(ji)=rover*ztend/zforc*zdvdt(ji) |
|---|
| 315 | endif |
|---|
| 316 | c |
|---|
| 317 | c BLOCKED FLOW DRAG: |
|---|
| 318 | C ----------------- |
|---|
| 319 | c |
|---|
| 320 | if(jk.gt.ikenvh(ji)) then |
|---|
| 321 | zb=1.0-0.18*pgam(ji)-0.04*pgam(ji)**2 |
|---|
| 322 | zc=0.48*pgam(ji)+0.3*pgam(ji)**2 |
|---|
| 323 | zconb=2.*ztmst*gkwake*psig(ji)/(4.*pstd(ji)) |
|---|
| 324 | zabsv=sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/2. |
|---|
| 325 | zzd1=zb*cos(zpsi(ji,jk))**2+zc*sin(zpsi(ji,jk))**2 |
|---|
| 326 | ratio=(cos(zpsi(ji,jk))**2+pgam(ji)*sin(zpsi(ji,jk))**2)/ |
|---|
| 327 | * (pgam(ji)*cos(zpsi(ji,jk))**2+sin(zpsi(ji,jk))**2) |
|---|
| 328 | zbet=max(0.,2.-1./ratio)*zconb*zzdep(ji,jk)*zzd1*zabsv |
|---|
| 329 | c |
|---|
| 330 | c OPPOSED TO THE WIND |
|---|
| 331 | c |
|---|
| 332 | zdudt(ji)=-pum1(ji,jk)/ztmst |
|---|
| 333 | zdvdt(ji)=-pvm1(ji,jk)/ztmst |
|---|
| 334 | c |
|---|
| 335 | c PERPENDICULAR TO THE SSO MAIN AXIS: |
|---|
| 336 | C |
|---|
| 337 | cmod zdudt(ji)=-(pum1(ji,jk)*cos(pthe(ji)*rpi/180.) |
|---|
| 338 | cmod * +pvm1(ji,jk)*sin(pthe(ji)*rpi/180.)) |
|---|
| 339 | cmod * *cos(pthe(ji)*rpi/180.)/ztmst |
|---|
| 340 | cmod zdvdt(ji)=-(pum1(ji,jk)*cos(pthe(ji)*rpi/180.) |
|---|
| 341 | cmod * +pvm1(ji,jk)*sin(pthe(ji)*rpi/180.)) |
|---|
| 342 | cmod * *sin(pthe(ji)*rpi/180.)/ztmst |
|---|
| 343 | C |
|---|
| 344 | zdudt(ji)=zdudt(ji)*(zbet/(1.+zbet)) |
|---|
| 345 | zdvdt(ji)=zdvdt(ji)*(zbet/(1.+zbet)) |
|---|
| 346 | |
|---|
| 347 | c output blocked flow stress |
|---|
| 348 | blustr(ji) = blustr(ji) |
|---|
| 349 | . +zdudt(ji)*(paphm1(ji,jk+1)-paphm1(ji,jk))/rg |
|---|
| 350 | blvstr(ji) = blvstr(ji) |
|---|
| 351 | . +zdvdt(ji)*(paphm1(ji,jk+1)-paphm1(ji,jk))/rg |
|---|
| 352 | |
|---|
| 353 | |
|---|
| 354 | end if |
|---|
| 355 | pvom(ji,jk)=zdudt(ji) |
|---|
| 356 | pvol(ji,jk)=zdvdt(ji) |
|---|
| 357 | zust=pum1(ji,jk)+ztmst*zdudt(ji) |
|---|
| 358 | zvst=pvm1(ji,jk)+ztmst*zdvdt(ji) |
|---|
| 359 | zdis=0.5*(pum1(ji,jk)**2+pvm1(ji,jk)**2-zust**2-zvst**2) |
|---|
| 360 | zdedt(ji)=zdis/ztmst |
|---|
| 361 | zvidis(ji)=zvidis(ji)+zdis*zdelp |
|---|
| 362 | c VENUS ATTENTION: CP VARIABLE |
|---|
| 363 | zdtdt(ji)=zdedt(ji)/rcpd |
|---|
| 364 | c |
|---|
| 365 | c NO TENDENCIES ON TEMPERATURE ..... |
|---|
| 366 | c |
|---|
| 367 | c Instead of, pte(ji,jk)=zdtdt(ji), due to mechanical dissipation |
|---|
| 368 | c |
|---|
| 369 | pte(ji,jk)=0.0 |
|---|
| 370 | |
|---|
| 371 | endif |
|---|
| 372 | |
|---|
| 373 | 523 continue |
|---|
| 374 | 524 continue |
|---|
| 375 | c |
|---|
| 376 | c |
|---|
| 377 | 501 continue |
|---|
| 378 | |
|---|
| 379 | return |
|---|
| 380 | end |
|---|
| 381 | |
|---|
