[524] | 1 | ! |
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[1279] | 2 | ! $Id: ugeostr.F90 2641 2016-09-29 21:26:46Z asima $ |
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[524] | 3 | ! |
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[1474] | 4 | subroutine ugeostr(phi,ucov) |
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[524] | 5 | |
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[1474] | 6 | ! Calcul du vent covariant geostrophique a partir du champ de |
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| 7 | ! geopotentiel. |
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| 8 | ! We actually compute: (1 - cos^8 \phi) u_g |
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| 9 | ! to have a wind going smoothly to 0 at the equator. |
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| 10 | ! We assume that the surface pressure is uniform so that model |
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| 11 | ! levels are pressure levels. |
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[524] | 12 | |
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[2641] | 13 | use comconst_mod, only: omeg, rad |
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| 14 | |
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[1474] | 15 | implicit none |
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[524] | 16 | |
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[1474] | 17 | include "dimensions.h" |
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| 18 | include "paramet.h" |
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| 19 | include "comgeom2.h" |
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[524] | 20 | |
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[1474] | 21 | real ucov(iip1,jjp1,llm),phi(iip1,jjp1,llm) |
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| 22 | real um(jjm,llm),fact,u(iip1,jjm,llm) |
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| 23 | integer i,j,l |
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[524] | 24 | |
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[1474] | 25 | real zlat |
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[524] | 26 | |
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[1474] | 27 | um(:,:)=0 ! initialize um() |
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[524] | 28 | |
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[1474] | 29 | DO j=1,jjm |
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[1279] | 30 | |
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[1474] | 31 | if (abs(sin(rlatv(j))).lt.1.e-4) then |
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| 32 | zlat=1.e-4 |
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| 33 | else |
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| 34 | zlat=rlatv(j) |
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| 35 | endif |
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| 36 | fact=cos(zlat) |
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| 37 | fact=fact*fact |
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| 38 | fact=fact*fact |
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| 39 | fact=fact*fact |
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| 40 | fact=(1.-fact)/ & |
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| 41 | (2.*omeg*sin(zlat)*(rlatu(j+1)-rlatu(j))) |
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| 42 | fact=-fact/rad |
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| 43 | DO l=1,llm |
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| 44 | DO i=1,iim |
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| 45 | u(i,j,l)=fact*(phi(i,j+1,l)-phi(i,j,l)) |
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| 46 | um(j,l)=um(j,l)+u(i,j,l)/REAL(iim) |
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| 47 | ENDDO |
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| 48 | ENDDO |
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| 49 | ENDDO |
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| 50 | call dump2d(jjm,llm,um,'Vent-u geostrophique') |
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[524] | 51 | |
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[1474] | 52 | ! calcul des champ de vent: |
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[524] | 53 | |
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[1474] | 54 | DO l=1,llm |
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| 55 | DO i=1,iip1 |
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| 56 | ucov(i,1,l)=0. |
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| 57 | ucov(i,jjp1,l)=0. |
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| 58 | end DO |
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| 59 | DO j=2,jjm |
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| 60 | DO i=1,iim |
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| 61 | ucov(i,j,l) = 0.5*(u(i,j,l)+u(i,j-1,l))*cu(i,j) |
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| 62 | end DO |
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| 63 | ucov(iip1,j,l)=ucov(1,j,l) |
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| 64 | end DO |
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| 65 | end DO |
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[524] | 66 | |
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[1474] | 67 | print *, 301 |
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[524] | 68 | |
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[1474] | 69 | end subroutine ugeostr |
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