1 | ! |
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2 | ! $Id: ugeostr.F90 2641 2016-09-29 21:26:46Z musat $ |
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3 | ! |
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4 | subroutine ugeostr(phi,ucov) |
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5 | |
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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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12 | |
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13 | use comconst_mod, only: omeg, rad |
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14 | |
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15 | implicit none |
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16 | |
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17 | include "dimensions.h" |
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18 | include "paramet.h" |
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19 | include "comgeom2.h" |
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20 | |
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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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24 | |
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25 | real zlat |
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26 | |
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27 | um(:,:)=0 ! initialize um() |
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28 | |
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29 | DO j=1,jjm |
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30 | |
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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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51 | |
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52 | ! calcul des champ de vent: |
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53 | |
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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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66 | |
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67 | print *, 301 |
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68 | |
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69 | end subroutine ugeostr |
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