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module clvent_m |
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IMPLICIT none |
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contains |
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SUBROUTINE clvent(dtime, u1lay, v1lay, coef, cdrag, t, ven, paprs, pplay, & |
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delp, d_ven, flux_v) |
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! Author: Z. X. Li (LMD/CNRS) |
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! Date: 1993/08/18 |
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! Objet : diffusion verticale de la vitesse |
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USE dimphy, ONLY: klev |
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use nr_util, only: assert_eq |
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USE suphec_m, ONLY: rd, rg |
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REAL, intent(in):: dtime ! intervalle de temps (en s) |
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REAL, intent(in):: u1lay(:), v1lay(:) ! (knon) |
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! vent de la premiere couche (m/s) |
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REAL, intent(in):: coef(:, 2:) ! (knon, 2:klev) |
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! Coefficient d'echange (m**2/s) multiplié par le cisaillement du |
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! vent (dV/dz) |
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REAL, intent(in):: cdrag(:) ! (knon) sans unité |
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REAL, intent(in):: t(:, :) ! (knon, klev) ! temperature (K) |
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REAL, intent(in):: ven(:, :) ! (knon, klev) vitesse horizontale (m/s) |
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REAL, intent(in):: paprs(:, :) ! (knon, klev+1) pression a inter-couche (Pa) |
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real, intent(in):: pplay(:, :) ! (knon, klev) pression au milieu |
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! de couche (Pa) |
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real, intent(in):: delp(:, :) ! (knon, klev) epaisseur de couche (Pa) |
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REAL, intent(out):: d_ven(:, :) ! (knon, klev) ! le changement de "ven" |
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REAL, intent(out):: flux_v(:) ! (knon) |
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! (diagnostic) flux du vent à la surface, en (kg m/s)/(m**2 s) |
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! flux_v est le flux de moment angulaire (positif vers bas) |
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! Local: |
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INTEGER knon, i, k |
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REAL zx_cv(size(u1lay), 2:klev) ! (knon, 2:klev) |
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REAL zx_dv(size(u1lay), 2:klev) ! (knon, 2:klev) |
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REAL zx_buf(size(u1lay)) ! (knon) |
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REAL zx_coef(size(u1lay), klev) ! (knon, klev) |
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REAL local_ven(size(u1lay), klev) ! (knon, klev) |
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!------------------------------------------------------------------ |
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knon = assert_eq([size(u1lay), size(v1lay), size(coef, 1), size(t, 1), & |
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size(ven, 1), size(paprs, 1), size(pplay, 1), size(delp, 1), & |
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size(d_ven, 1), size(flux_v)], "clvent knon") |
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local_ven = ven |
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DO i = 1, knon |
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zx_coef(i, 1) = cdrag(i) * (1. + SQRT(u1lay(i)**2 + v1lay(i)**2)) & |
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* pplay(i, 1) / (RD * t(i, 1)) * dtime * RG |
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ENDDO |
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DO k = 2, klev |
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DO i = 1, knon |
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zx_coef(i, k) = coef(i, k) * RG / (pplay(i, k-1) - pplay(i, k)) & |
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* (paprs(i, k) * 2 / (t(i, k) + t(i, k - 1)) / RD)**2 |
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zx_coef(i, k) = zx_coef(i, k) * dtime * RG |
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ENDDO |
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ENDDO |
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DO i = 1, knon |
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zx_buf(i) = delp(i, 1) + zx_coef(i, 1)+zx_coef(i, 2) |
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zx_cv(i, 2) = local_ven(i, 1)*delp(i, 1) / zx_buf(i) |
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zx_dv(i, 2) = zx_coef(i, 2) & |
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/zx_buf(i) |
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ENDDO |
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DO k = 3, klev |
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DO i = 1, knon |
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zx_buf(i) = delp(i, k-1) + zx_coef(i, k) & |
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+ zx_coef(i, k-1)*(1.-zx_dv(i, k-1)) |
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zx_cv(i, k) = (local_ven(i, k-1)*delp(i, k-1) & |
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+zx_coef(i, k-1)*zx_cv(i, k-1) )/zx_buf(i) |
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zx_dv(i, k) = zx_coef(i, k)/zx_buf(i) |
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ENDDO |
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ENDDO |
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DO i = 1, knon |
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local_ven(i, klev) = ( local_ven(i, klev)*delp(i, klev) & |
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+zx_coef(i, klev)*zx_cv(i, klev) ) & |
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/ ( delp(i, klev) + zx_coef(i, klev) & |
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-zx_coef(i, klev)*zx_dv(i, klev) ) |
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ENDDO |
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DO k = klev-1, 1, -1 |
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DO i = 1, knon |
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local_ven(i, k) = zx_cv(i, k+1) + zx_dv(i, k+1)*local_ven(i, k+1) |
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ENDDO |
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ENDDO |
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DO i = 1, knon |
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flux_v(i) = zx_coef(i, 1)/(RG*dtime) & |
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*local_ven(i, 1) |
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ENDDO |
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DO k = 1, klev |
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DO i = 1, knon |
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d_ven(i, k) = local_ven(i, k) - ven(i, k) |
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ENDDO |
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ENDDO |
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END SUBROUTINE clvent |
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end module clvent_m |
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