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SUBROUTINE orodrag(nlon,nlev,kgwd,kdx,ktest,ptsphy,paphm1,papm1,pgeom1, & |
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ptm1,pum1,pvm1,pmea,pstd,psig,pgamma,ptheta,ppic,pval & |
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,pulow,pvlow,pvom,pvol,pte) |
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|
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USE dimens_m |
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USE dimphy |
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USE suphec_m |
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USE yoegwd |
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IMPLICIT NONE |
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|
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!**** *gwdrag* - does the gravity wave parametrization. |
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|
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! purpose. |
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! -------- |
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|
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! this routine computes the physical tendencies of the |
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! prognostic variables u,v and t due to vertical transports by |
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! subgridscale orographically excited gravity waves |
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|
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!** interface. |
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! ---------- |
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! called from *callpar*. |
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|
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! the routine takes its input from the long-term storage: |
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! u,v,t and p at t-1. |
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|
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! explicit arguments : |
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! -------------------- |
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! ==== inputs === |
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! ==== outputs === |
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|
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! implicit arguments : none |
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! -------------------- |
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! implicit logical (l) |
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|
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! method. |
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! ------- |
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|
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! externals. |
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! ---------- |
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INTEGER ismin, ismax |
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EXTERNAL ismin, ismax |
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|
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! reference. |
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! ---------- |
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|
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! author. |
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! ------- |
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! m.miller + b.ritter e.c.m.w.f. 15/06/86. |
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|
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! f.lott + m. miller e.c.m.w.f. 22/11/94 |
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!----------------------------------------------------------------------- |
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!----------------------------------------------------------------------- |
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|
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!* 0.1 arguments |
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! --------- |
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|
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INTEGER nlon, nlev, klevm1 |
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INTEGER kgwd, jl, ilevp1, jk, ji |
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REAL zdelp, ztemp, zforc, ztend |
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REAL rover, zb, zc, zconb, zabsv |
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REAL zzd1, ratio, zbet, zust, zvst, zdis |
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REAL pte(nlon,nlev), pvol(nlon,nlev), pvom(nlon,nlev), pulow(klon), & |
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pvlow(klon) |
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REAL pum1(nlon,nlev), pvm1(nlon,nlev), ptm1(nlon,nlev), pmea(nlon) |
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REAL, INTENT (IN) :: pstd(nlon) |
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REAL, INTENT (IN) :: psig(nlon) |
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REAL pgamma(nlon), ptheta(nlon), ppic(nlon), pval(nlon), & |
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pgeom1(nlon,nlev), papm1(nlon,nlev), paphm1(nlon,nlev+1) |
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|
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INTEGER kdx(nlon), ktest(nlon) |
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!----------------------------------------------------------------------- |
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|
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!* 0.2 local arrays |
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! ------------ |
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INTEGER isect(klon), icrit(klon), ikcrith(klon), ikenvh(klon), & |
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iknu(klon), iknu2(klon), ikcrit(klon), ikhlim(klon) |
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|
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REAL ztau(klon,klev+1), ztauf(klon,klev+1), zstab(klon,klev+1), & |
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zvph(klon,klev+1), zrho(klon,klev+1), zri(klon,klev+1), & |
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zpsi(klon,klev+1), zzdep(klon,klev) |
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REAL zdudt(klon), zdvdt(klon), zdtdt(klon), zdedt(klon), zvidis(klon), & |
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znu(klon), zd1(klon), zd2(klon), zdmod(klon) |
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REAL ztmst, zrtmst |
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REAL, INTENT (IN) :: ptsphy |
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|
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!------------------------------------------------------------------ |
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|
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!* 1. initialization |
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! -------------- |
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100 CONTINUE |
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|
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! ------------------------------------------------------------------ |
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|
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!* 1.1 computational constants |
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! ----------------------- |
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110 CONTINUE |
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|
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! ztmst=twodt |
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! if(nstep.eq.nstart) ztmst=0.5*twodt |
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klevm1 = klev - 1 |
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ztmst = ptsphy |
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zrtmst = 1./ztmst |
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! ------------------------------------------------------------------ |
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|
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120 CONTINUE |
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|
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! ------------------------------------------------------------------ |
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|
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!* 1.3 check whether row contains point for printing |
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! --------------------------------------------- |
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130 CONTINUE |
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|
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! ------------------------------------------------------------------ |
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|
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!* 2. precompute basic state variables. |
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!* ---------- ----- ----- ---------- |
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!* define low level wind, project winds in plane of |
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!* low level wind, determine sector in which to take |
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!* the variance and set indicator for critical levels. |
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200 CONTINUE |
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CALL orosetup(nlon,ktest,ikcrit,ikcrith,icrit,ikenvh,iknu,iknu2,paphm1, & |
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papm1,pum1,pvm1,ptm1,pgeom1,pstd,zrho,zri,zstab,ztau,zvph,zpsi,zzdep, & |
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pulow,pvlow,ptheta,pgamma,pmea,ppic,pval,znu,zd1,zd2,zdmod) |
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|
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!*********************************************************** |
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!* 3. compute low level stresses using subcritical and |
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!* supercritical forms.computes anisotropy coefficient |
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!* as measure of orographic twodimensionality. |
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300 CONTINUE |
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|
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CALL gwstress(nlon,nlev,ktest,icrit,ikenvh,iknu,zrho,zstab,zvph,pstd, & |
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psig,pmea,ppic,ztau,pgeom1,zdmod) |
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!* 4. compute stress profile. |
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!* ------- ------ -------- |
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400 CONTINUE |
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CALL gwprofil(nlon,nlev,kgwd,kdx,ktest,ikcrith,icrit,paphm1,zrho,zstab, & |
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zvph,zri,ztau,zdmod,psig,pstd) |
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!* 5. compute tendencies. |
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!* ------------------- |
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500 CONTINUE |
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! explicit solution at all levels for the gravity wave |
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! implicit solution for the blocked levels |
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DO 510 jl = 1, klon |
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zvidis(jl) = 0.0 |
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zdudt(jl) = 0.0 |
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zdvdt(jl) = 0.0 |
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zdtdt(jl) = 0.0 |
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510 CONTINUE |
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ilevp1 = klev + 1 |
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DO 524 jk = 1, klev |
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|
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! do 523 jl=1,kgwd |
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! ji=kdx(jl) |
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! Modif vectorisation 02/04/2004 |
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DO 523 ji = 1, klon |
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IF (ktest(ji)==1) THEN |
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zdelp = paphm1(ji,jk+1) - paphm1(ji,jk) |
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ztemp = -rg*(ztau(ji,jk+1)-ztau(ji,jk))/(zvph(ji,ilevp1)*zdelp) |
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zdudt(ji) = (pulow(ji)*zd1(ji)-pvlow(ji)*zd2(ji))*ztemp/zdmod(ji) |
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zdvdt(ji) = (pvlow(ji)*zd1(ji)+pulow(ji)*zd2(ji))*ztemp/zdmod(ji) |
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! controle des overshoots: |
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zforc = sqrt(zdudt(ji)**2+zdvdt(ji)**2) + 1.E-12 |
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ztend = sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/ztmst + 1.E-12 |
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rover = 0.25 |
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IF (zforc>=rover*ztend) THEN |
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zdudt(ji) = rover*ztend/zforc*zdudt(ji) |
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zdvdt(ji) = rover*ztend/zforc*zdvdt(ji) |
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END IF |
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|
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! fin du controle des overshoots |
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|
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IF (jk>=ikenvh(ji)) THEN |
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zb = 1.0 - 0.18*pgamma(ji) - 0.04*pgamma(ji)**2 |
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zc = 0.48*pgamma(ji) + 0.3*pgamma(ji)**2 |
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zconb = 2.*ztmst*gkwake*psig(ji)/(4.*pstd(ji)) |
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zabsv = sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/2. |
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zzd1 = zb*cos(zpsi(ji,jk))**2 + zc*sin(zpsi(ji,jk))**2 |
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ratio = (cos(zpsi(ji,jk))**2+pgamma(ji)*sin(zpsi(ji, & |
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jk))**2)/(pgamma(ji)*cos(zpsi(ji,jk))**2+sin(zpsi(ji,jk))**2) |
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zbet = max(0.,2.-1./ratio)*zconb*zzdep(ji,jk)*zzd1*zabsv |
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|
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! simplement oppose au vent |
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zdudt(ji) = -pum1(ji,jk)/ztmst |
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zdvdt(ji) = -pvm1(ji,jk)/ztmst |
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! projection dans la direction de l'axe principal de l'orographie |
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!mod zdudt(ji)=-(pum1(ji,jk)*cos(ptheta(ji)*rpi/180.) |
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!mod * +pvm1(ji,jk)*sin(ptheta(ji)*rpi/180.)) |
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!mod * *cos(ptheta(ji)*rpi/180.)/ztmst |
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!mod zdvdt(ji)=-(pum1(ji,jk)*cos(ptheta(ji)*rpi/180.) |
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!mod * +pvm1(ji,jk)*sin(ptheta(ji)*rpi/180.)) |
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!mod * *sin(ptheta(ji)*rpi/180.)/ztmst |
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zdudt(ji) = zdudt(ji)*(zbet/(1.+zbet)) |
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zdvdt(ji) = zdvdt(ji)*(zbet/(1.+zbet)) |
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END IF |
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pvom(ji,jk) = zdudt(ji) |
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pvol(ji,jk) = zdvdt(ji) |
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zust = pum1(ji,jk) + ztmst*zdudt(ji) |
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zvst = pvm1(ji,jk) + ztmst*zdvdt(ji) |
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zdis = 0.5*(pum1(ji,jk)**2+pvm1(ji,jk)**2-zust**2-zvst**2) |
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zdedt(ji) = zdis/ztmst |
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zvidis(ji) = zvidis(ji) + zdis*zdelp |
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zdtdt(ji) = zdedt(ji)/rcpd |
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! pte(ji,jk)=zdtdt(ji) |
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|
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! ENCORE UN TRUC POUR EVITER LES EXPLOSIONS |
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pte(ji,jk) = 0.0 |
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|
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END IF |
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523 CONTINUE |
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|
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524 CONTINUE |
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|
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|
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RETURN |
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END |
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