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contains |
contains |
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SUBROUTINE fonte_neige(nisurf, dtime, precip_rain, precip_snow, snow, qsol, & |
SUBROUTINE fonte_neige(nisurf, precip_rain, precip_snow, snow, qsol, & |
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tsurf_new, evap, fqcalving, ffonte, run_off_lic_0) |
tsurf_new, evap, fqcalving, ffonte, run_off_lic_0) |
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! Routine de traitement de la fonte de la neige dans le cas du traitement |
! Routine de traitement de la fonte de la neige dans le cas du traitement |
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! Laurent Fairhead, March, 2001 |
! Laurent Fairhead, March, 2001 |
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use comconst, only: dtphys |
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USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
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USE conf_interface_m, ONLY: tau_calv |
USE conf_interface_m, ONLY: tau_calv |
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use nr_util, only: assert_eq |
use nr_util, only: assert_eq |
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USE suphec_m, ONLY: rday, rlmlt, rtt |
USE suphec_m, ONLY: rday, rlmlt, rtt |
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integer, intent(IN):: nisurf ! surface \`a traiter |
integer, intent(IN):: nisurf ! surface \`a traiter |
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real, intent(IN):: dtime ! pas de temps de la physique (en s) |
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real, intent(IN):: precip_rain(:) ! (knon) |
real, intent(IN):: precip_rain(:) ! (knon) |
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! precipitation, liquid water mass flux (kg / m2 / s), positive down |
! precipitation, liquid water mass flux (kg / m2 / s), positive down |
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size(qsol), size(tsurf_new), size(evap), size(fqcalving), & |
size(qsol), size(tsurf_new), size(evap), size(fqcalving), & |
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size(ffonte), size(run_off_lic_0)/), "fonte_neige knon") |
size(ffonte), size(run_off_lic_0)/), "fonte_neige knon") |
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coeff_rel = dtime / (tau_calv * rday) |
coeff_rel = dtphys / (tau_calv * rday) |
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WHERE (precip_snow > 0.) snow = snow + precip_snow * dtime |
WHERE (precip_snow > 0.) snow = snow + precip_snow * dtphys |
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WHERE (evap > 0.) |
WHERE (evap > 0.) |
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snow_evap = MIN(snow / dtime, evap) |
snow_evap = MIN(snow / dtphys, evap) |
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snow = snow - snow_evap * dtime |
snow = snow - snow_evap * dtphys |
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snow = MAX(0., snow) |
snow = MAX(0., snow) |
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elsewhere |
elsewhere |
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snow_evap = 0. |
snow_evap = 0. |
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end where |
end where |
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bil_eau_s = (precip_rain - evap + snow_evap) * dtime |
bil_eau_s = (precip_rain - evap + snow_evap) * dtphys |
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! Y a-t-il fonte de neige ? |
! Y a-t-il fonte de neige ? |
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if ((snow(i) > epsfra .OR. nisurf == is_sic & |
if ((snow(i) > epsfra .OR. nisurf == is_sic & |
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.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
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fq_fonte = MIN(MAX((tsurf_new(i) - RTT) / chasno, 0.), snow(i)) |
fq_fonte = MIN(MAX((tsurf_new(i) - RTT) / chasno, 0.), snow(i)) |
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ffonte(i) = fq_fonte * RLMLT / dtime |
ffonte(i) = fq_fonte * RLMLT / dtphys |
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snow(i) = max(0., snow(i) - fq_fonte) |
snow(i) = max(0., snow(i) - fq_fonte) |
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bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
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tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
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!IM cf. JLD/ GKtest fonte aussi pour la glace |
!IM cf. JLD/ GKtest fonte aussi pour la glace |
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IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
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fq_fonte = MAX((tsurf_new(i) - RTT) / chaice, 0.) |
fq_fonte = MAX((tsurf_new(i) - RTT) / chaice, 0.) |
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ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtime |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtphys |
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bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
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tsurf_new(i) = RTT |
tsurf_new(i) = RTT |
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ENDIF |
ENDIF |
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endif |
endif |
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! S'il y a une hauteur trop importante de neige, elle s'\'ecoule |
! S'il y a une hauteur trop importante de neige, elle s'\'ecoule |
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fqcalving(i) = max(0., snow(i) - snow_max) / dtime |
fqcalving(i) = max(0., snow(i) - snow_max) / dtphys |
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snow(i) = min(snow(i), snow_max) |
snow(i) = min(snow(i), snow_max) |
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enddo |
enddo |
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run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
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(1. - coeff_rel) * run_off_lic_0(i) |
(1. - coeff_rel) * run_off_lic_0(i) |
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run_off_lic_0(i) = run_off_lic(i) |
run_off_lic_0(i) = run_off_lic(i) |
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run_off_lic(i) = run_off_lic(i) + bil_eau_s(i) / dtime |
run_off_lic(i) = run_off_lic(i) + bil_eau_s(i) / dtphys |
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enddo |
enddo |
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endif |
endif |
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