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contains |
contains |
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SUBROUTINE coefcdrag (nsrf, speed, t, q, zgeop, psol, ts, qsurf, rugos, & |
SUBROUTINE coefcdrag (nsrf, speed, t, q, zgeop, psol, ts, qsurf, rugos, & |
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cdram, cdrah, cdran, zri1, pref) |
pcfm, pcfh, pref) |
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! From LMDZ4/libf/phylmd/coefcdrag.F90, version 1.1.1.1, 2004/05/19 12:53:07 |
! From LMDZ4/libf/phylmd/coefcdrag.F90, version 1.1.1.1, 2004/05/19 12:53:07 |
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! Objet : calcul des cdrags pour le moment (cdram) et les flux de |
! Objet : calcul des cdrags pour le moment (pcfm) et les flux de |
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! chaleur sensible et latente (cdrah), du drag coefficient neutre |
! chaleur sensible et latente (pcfh) et de la pression au niveau |
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! (cdran), du nombre de Richardson entre la surface et le niveau |
! de reference (pref). |
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! de reference (zri1) et de la pression au niveau de reference |
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! (pref). |
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! I. Musat, 01.07.2002 |
! I. Musat, 01.07.2002 |
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use indicesol, only: is_oce |
use indicesol, only: is_oce |
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use nr_util, only: assert_eq |
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use SUPHEC_M, only: rd, retv, rg, rkappa |
use SUPHEC_M, only: rd, retv, rg, rkappa |
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use dimphy, only: klon |
use dimphy, only: klon |
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! qsurf---input-R- humidite de l'air a la surface |
! qsurf---input-R- humidite de l'air a la surface |
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! rugos---input-R- rugosite |
! rugos---input-R- rugosite |
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REAL, dimension(klon), intent(out) :: cdram, cdrah, cdran, zri1, pref |
REAL, dimension(klon), intent(out) :: pcfm, pcfh |
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! cdram--output-R- drag coefficient pour le moment |
! drag coefficients pour le moment et pour les flux de chaleur |
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! cdrah--output-R- drag coefficient pour les flux de chaleur latente et sensible |
! latente et sensible |
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! cdran--output-R- drag coefficient neutre |
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! zri1---output-R- nb. Richardson entre la surface et la couche zgeop/RG |
REAL, intent(out), optional:: pref(:) ! (knon) pression au niveau zgeop/RG |
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! pref---output-R- pression au niveau zgeop/RG |
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! Local: |
! Local: |
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REAL, parameter :: RKAR=0.40, CB=5.0, CC=5.0, CD=5.0 |
REAL, parameter :: CKAP=0.40, CB=5.0, CC=5.0, CD=5.0 |
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INTEGER :: i |
INTEGER :: i |
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REAL, dimension(klon) :: zdu2, zdphi, ztsolv, ztvd |
REAL, dimension(klon) :: zdu2, ztsolv, ztvd |
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REAL, dimension(klon) :: zscf, friv, frih, zucf, zcr |
REAL, dimension(klon) :: zscf, friv, frih, zucf, zcr |
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REAL, dimension(klon) :: zcfm1, zcfh1 |
REAL, dimension(klon) :: zcfm1, zcfh1 |
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REAL, dimension(klon) :: zcfm2, zcfh2 |
REAL, dimension(klon) :: zcfm2, zcfh2 |
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REAL, dimension(klon) :: trm0, trm1 |
REAL, dimension(klon) :: trm0, trm1 |
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real cdran(klon) ! drag coefficient neutre |
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REAL pref_local(size(speed)) ! (knon) pression au niveau zgeop/RG |
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REAL zri1(klon) |
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! nb. Richardson entre la surface et la couche zgeop/RG |
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! nombre de Richardson entre la surface et le niveau de reference (zri1) |
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!------------------------------------------------------------------------- |
!------------------------------------------------------------------------- |
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DO i = 1, size(speed) |
DO i = 1, size(speed) |
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zdphi(i) = zgeop(i) |
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zdu2(i) = speed(i)**2 |
zdu2(i) = speed(i)**2 |
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pref(i) = exp(log(psol(i)) - zdphi(i)/(RD*t(i)* & |
pref_local(i) = exp(log(psol(i)) - zgeop(i)/(RD*t(i)* & |
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(1.+ RETV * max(q(i), 0.0)))) |
(1.+ RETV * max(q(i), 0.0)))) |
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ztsolv(i) = ts(i) |
ztsolv(i) = ts(i) |
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ztvd(i) = t(i) * (psol(i)/pref(i))**RKAPPA |
ztvd(i) = t(i) * (psol(i)/pref_local(i))**RKAPPA |
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trm0(i) = 1. + RETV * max(qsurf(i), 0.0) |
trm0(i) = 1. + RETV * max(qsurf(i), 0.0) |
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trm1(i) = 1. + RETV * max(q(i), 0.0) |
trm1(i) = 1. + RETV * max(q(i), 0.0) |
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ztsolv(i) = ztsolv(i) * trm0(i) |
ztsolv(i) = ztsolv(i) * trm0(i) |
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ztvd(i) = ztvd(i) * trm1(i) |
ztvd(i) = ztvd(i) * trm1(i) |
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zri1(i) = zdphi(i)*(ztvd(i)-ztsolv(i))/(zdu2(i)*ztvd(i)) |
zri1(i) = zgeop(i)*(ztvd(i)-ztsolv(i))/(zdu2(i)*ztvd(i)) |
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cdran(i) = (RKAR/log(1.+zdphi(i)/(RG*rugos(i))))**2 |
cdran(i) = (CKAP/log(1.+zgeop(i)/(RG*rugos(i))))**2 |
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IF (zri1(i) >= 0.) THEN |
IF (zri1(i) >= 0.) THEN |
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! situation stable : pour eviter les inconsistances dans les cas |
! situation stable : pour eviter les inconsistances dans les cas |
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zcfm1(i) = cdran(i) * friv(i) |
zcfm1(i) = cdran(i) * friv(i) |
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frih(i) = max(1./ (1.+3.*CB*zri1(i)*zscf(i)), 0.1) |
frih(i) = max(1./ (1.+3.*CB*zri1(i)*zscf(i)), 0.1) |
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zcfh1(i) = cdran(i) * frih(i) |
zcfh1(i) = cdran(i) * frih(i) |
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cdram(i) = zcfm1(i) |
pcfm(i) = zcfm1(i) |
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cdrah(i) = zcfh1(i) |
pcfh(i) = zcfh1(i) |
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ELSE |
ELSE |
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! situation instable |
! situation instable |
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zucf(i) = 1./(1.+3.0*CB*CC*cdran(i)*SQRT(ABS(zri1(i)) & |
zucf(i) = 1./(1.+3.0*CB*CC*cdran(i)*SQRT(ABS(zri1(i)) & |
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*(1.0+zdphi(i)/(RG*rugos(i))))) |
*(1.0+zgeop(i)/(RG*rugos(i))))) |
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zcfm2(i) = cdran(i)*max((1.-2.0*CB*zri1(i)*zucf(i)), 0.1) |
zcfm2(i) = cdran(i)*max((1.-2.0*CB*zri1(i)*zucf(i)), 0.1) |
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zcfh2(i) = cdran(i)*max((1.-3.0*CB*zri1(i)*zucf(i)), 0.1) |
zcfh2(i) = cdran(i)*max((1.-3.0*CB*zri1(i)*zucf(i)), 0.1) |
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cdram(i) = zcfm2(i) |
pcfm(i) = zcfm2(i) |
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cdrah(i) = zcfh2(i) |
pcfh(i) = zcfh2(i) |
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! cdrah sur l'ocean cf. Miller et al. (1992) |
! pcfh sur l'ocean cf. Miller et al. (1992) |
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zcr(i) = (0.0016/(cdran(i)*SQRT(zdu2(i))))*ABS(ztvd(i)-ztsolv(i)) & |
zcr(i) = (0.0016/(cdran(i)*SQRT(zdu2(i))))*ABS(ztvd(i)-ztsolv(i)) & |
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**(1./3.) |
**(1./3.) |
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IF (nsrf == is_oce) cdrah(i) = cdran(i)*(1.0+zcr(i)**1.25) & |
IF (nsrf == is_oce) pcfh(i) = cdran(i)*(1.0+zcr(i)**1.25) **(1./1.25) |
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**(1./1.25) |
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ENDIF |
ENDIF |
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END DO |
END DO |
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if (present(pref)) pref = pref_local |
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END SUBROUTINE coefcdrag |
END SUBROUTINE coefcdrag |
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end module coefcdrag_m |
end module coefcdrag_m |