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module tau2alpha_m |
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|
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USE paramet_m, ONLY : iip1, jjp1 |
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USE dimens_m, ONLY : jjm |
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|
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IMPLICIT NONE |
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|
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private iip1, jjp1, jjm |
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|
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REAL dxdys(iip1, jjp1), dxdyu(iip1, jjp1), dxdyv(iip1, jjm) |
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|
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contains |
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|
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SUBROUTINE tau2alpha(type, pim, pjm, factt, taumin, taumax, alpha) |
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|
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USE comgeom, ONLY : cu_2d, cv_2d, rlatu, rlatv |
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use conf_guide_m, only: lat_min_guide, lat_max_guide |
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use dump2d_m, only: dump2d |
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USE dimens_m, ONLY : iim |
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USE nr_util, ONLY : pi |
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USE serre, ONLY : clat, clon, grossismx, grossismy |
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|
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! arguments : |
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INTEGER type |
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INTEGER pim, pjm |
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REAL, intent(in):: factt, taumin, taumax |
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REAL dxdy_, alpha(pim, pjm) |
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REAL dxdy_min, dxdy_max |
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|
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! local : |
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REAL alphamin, alphamax, gamma, xi |
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SAVE gamma |
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INTEGER i, j, ilon, ilat |
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|
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LOGICAL first |
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SAVE first |
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DATA first/ .TRUE./ |
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|
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REAL zdx(iip1, jjp1), zdy(iip1, jjp1) |
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REAL zlat |
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|
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!------------------------------------------------------------ |
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|
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IF (first) THEN |
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DO j = 2, jjm |
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DO i = 2, iip1 |
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zdx(i, j) = 0.5*(cu_2d(i-1, j)+cu_2d(i, j))/cos(rlatu(j)) |
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END DO |
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zdx(1, j) = zdx(iip1, j) |
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END DO |
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DO j = 2, jjm |
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DO i = 1, iip1 |
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zdy(i, j) = 0.5*(cv_2d(i, j-1)+cv_2d(i, j)) |
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END DO |
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END DO |
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DO i = 1, iip1 |
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zdx(i, 1) = zdx(i, 2) |
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zdx(i, jjp1) = zdx(i, jjm) |
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zdy(i, 1) = zdy(i, 2) |
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zdy(i, jjp1) = zdy(i, jjm) |
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END DO |
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DO j = 1, jjp1 |
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DO i = 1, iip1 |
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dxdys(i, j) = sqrt(zdx(i, j)*zdx(i, j)+zdy(i, j)*zdy(i, j)) |
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END DO |
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END DO |
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DO j = 1, jjp1 |
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DO i = 1, iim |
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dxdyu(i, j) = 0.5*(dxdys(i, j)+dxdys(i+1, j)) |
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END DO |
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dxdyu(iip1, j) = dxdyu(1, j) |
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END DO |
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DO j = 1, jjm |
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DO i = 1, iip1 |
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dxdyv(i, j) = 0.5*(dxdys(i, j)+dxdys(i, j + 1)) |
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END DO |
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END DO |
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|
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CALL dump2d(iip1, jjp1, dxdys, 'DX2DY2 SCAL ') |
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CALL dump2d(iip1, jjp1, dxdyu, 'DX2DY2 U ') |
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CALL dump2d(iip1, jjp1, dxdyv, 'DX2DY2 v ') |
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|
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! coordonnees du centre du zoom |
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CALL coordij(clon, clat, ilon, ilat) |
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! aire de la maille au centre du zoom |
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dxdy_min = dxdys(ilon, ilat) |
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! dxdy maximale de la maille |
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dxdy_max = 0. |
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DO j = 1, jjp1 |
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DO i = 1, iip1 |
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dxdy_max = max(dxdy_max, dxdys(i, j)) |
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END DO |
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END DO |
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|
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IF (abs(grossismx-1.)<0.1 .OR. abs(grossismy-1.)<0.1) THEN |
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PRINT *, 'ATTENTION modele peu zoome' |
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PRINT *, 'ATTENTION on prend une constante de guidage cste' |
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gamma = 0. |
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ELSE |
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gamma = (dxdy_max-2.*dxdy_min)/(dxdy_max-dxdy_min) |
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PRINT *, 'gamma=', gamma |
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IF (gamma<1.E-5) THEN |
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PRINT *, 'gamma =', gamma, '<1e-5' |
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STOP |
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END IF |
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PRINT *, 'gamma=', gamma |
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gamma = log(0.5)/log(gamma) |
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END IF |
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END IF |
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|
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alphamin = factt/taumax |
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alphamax = factt/taumin |
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|
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DO j = 1, pjm |
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DO i = 1, pim |
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IF (type==1) THEN |
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dxdy_ = dxdys(i, j) |
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zlat = rlatu(j)*180./pi |
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ELSE IF (type==2) THEN |
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dxdy_ = dxdyu(i, j) |
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zlat = rlatu(j)*180./pi |
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ELSE IF (type==3) THEN |
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dxdy_ = dxdyv(i, j) |
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zlat = rlatv(j)*180./pi |
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END IF |
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IF (abs(grossismx-1.)<0.1 .OR. abs(grossismy-1.)<0.1) THEN |
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! pour une grille reguliere, xi=xxx**0=1 -> alpha=alphamin |
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alpha(i, j) = alphamin |
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ELSE |
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xi = ((dxdy_max-dxdy_)/(dxdy_max-dxdy_min))**gamma |
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xi = min(xi, 1.) |
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IF (lat_min_guide<=zlat .AND. zlat<=lat_max_guide) THEN |
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alpha(i, j) = xi*alphamin + (1.-xi)*alphamax |
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ELSE |
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alpha(i, j) = 0. |
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END IF |
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END IF |
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END DO |
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END DO |
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|
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END SUBROUTINE tau2alpha |
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|
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end module tau2alpha_m |
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