4 |
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5 |
contains |
contains |
6 |
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7 |
SUBROUTINE fonte_neige( klon, knon, nisurf, dtime, & |
SUBROUTINE fonte_neige(nisurf, dtime, tsurf, p1lay, beta, coef1lay, ps, & |
8 |
tsurf, p1lay, cal, beta, coef1lay, ps, & |
precip_rain, precip_snow, snow, qsol, t1lay, q1lay, u1lay, v1lay, & |
9 |
precip_rain, precip_snow, snow, qsol, & |
petAcoef, peqAcoef, petBcoef, peqBcoef, tsurf_new, evap, fqcalving, & |
10 |
radsol, dif_grnd, t1lay, q1lay, u1lay, v1lay, & |
ffonte, run_off_lic_0) |
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petAcoef, peqAcoef, petBcoef, peqBcoef, & |
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tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l, & |
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fqcalving, ffonte, run_off_lic_0) |
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11 |
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12 |
! 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 |
13 |
! de sol simplifié |
! de sol simplifi\'e |
14 |
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15 |
! LF 03/2001 |
! Laurent Fairhead, March, 2001 |
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! input: |
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! knon nombre de points a traiter |
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! nisurf surface a traiter |
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! tsurf temperature de surface |
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! p1lay pression 1er niveau (milieu de couche) |
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! cal capacite calorifique du sol |
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! beta evap reelle |
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! coef1lay coefficient d'echange |
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! ps pression au sol |
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! precip_rain precipitations liquides |
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! precip_snow precipitations solides |
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! snow champs hauteur de neige |
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! qsol hauteur d'eau contenu dans le sol |
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! runoff runoff en cas de trop plein |
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! petAcoef coeff. A de la resolution de la CL pour t |
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! peqAcoef coeff. A de la resolution de la CL pour q |
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! petBcoef coeff. B de la resolution de la CL pour t |
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! peqBcoef coeff. B de la resolution de la CL pour q |
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! radsol rayonnement net aus sol (LW + SW) |
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! dif_grnd coeff. diffusion vers le sol profond |
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16 |
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17 |
! output: |
USE fcttre, ONLY: foeew, qsatl, qsats, thermcep |
18 |
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USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
19 |
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USE interface_surf, ONLY: run_off_lic, tau_calv |
20 |
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use nr_util, only: assert_eq |
21 |
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USE suphec_m, ONLY: rcpd, rday, retv, rlmlt, rlstt, rlvtt, rtt |
22 |
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USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 |
23 |
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24 |
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integer, intent(IN):: nisurf ! surface \`a traiter |
25 |
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real, intent(IN):: dtime ! pas de temps de la physique (en s) |
26 |
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real, intent(IN):: tsurf(:) ! (knon) temperature de surface |
27 |
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real, intent(IN):: p1lay(:) ! (knon) pression 1er niveau (milieu de couche) |
28 |
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real, intent(IN):: beta(:) ! (knon) evap reelle |
29 |
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real, intent(IN):: coef1lay(:) ! (knon) coefficient d'echange |
30 |
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real, intent(IN):: ps(:) ! (knon) pression au sol |
31 |
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32 |
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real, intent(IN):: precip_rain(:) ! (knon) |
33 |
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! precipitation, liquid water mass flux (kg / m2 / s), positive down |
34 |
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35 |
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real, intent(IN):: precip_snow(:) ! (knon) |
36 |
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! precipitation, solid water mass flux (kg / m2 / s), positive down |
37 |
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38 |
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real, intent(INOUT):: snow(:) ! (knon) |
39 |
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! column-density of mass of snow, in kg m-2 |
40 |
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41 |
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real, intent(INOUT):: qsol(:) ! (knon) |
42 |
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! column-density of water in soil, in kg m-2 |
43 |
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44 |
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real, intent(IN):: t1lay(:) ! (knon) |
45 |
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real, intent(IN):: q1lay(:) ! (knon) |
46 |
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real, intent(IN):: u1lay(:), v1lay(:) ! (knon) |
47 |
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48 |
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real, intent(IN):: petAcoef(:), peqAcoef(:) ! (knon) |
49 |
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! coefficients A de la r\'esolution de la couche limite pour t et q |
50 |
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51 |
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real, intent(IN):: petBcoef(:), peqBcoef(:) ! (knon) |
52 |
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! coefficients B de la r\'esolution de la couche limite pour t et q |
53 |
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54 |
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real, intent(INOUT):: tsurf_new(:) |
55 |
! tsurf_new temperature au sol |
! tsurf_new temperature au sol |
56 |
! fluxsens flux de chaleur sensible |
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57 |
! fluxlat flux de chaleur latente |
real, intent(IN):: evap(:) ! (knon) |
58 |
! dflux_s derivee du flux de chaleur sensible / Ts |
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59 |
! dflux_l derivee du flux de chaleur latente / Ts |
real, intent(OUT):: fqcalving(:) ! (knon) |
60 |
! in/out: |
! flux d'eau "perdue" par la surface et n\'ecessaire pour limiter la |
61 |
! run_off_lic_0 run off glacier du pas de temps précedent |
! hauteur de neige, en kg / m2 / s |
62 |
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63 |
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real, intent(OUT):: ffonte(:) ! (knon) |
64 |
use indicesol |
! flux thermique utilis\'é pour fondre la neige |
65 |
use SUPHEC_M |
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66 |
use yoethf_m |
real, intent(INOUT):: run_off_lic_0(:) ! (knon) |
67 |
use fcttre |
! run off glacier du pas de temps pr\'ecedent |
68 |
use interface_surf |
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69 |
!IM cf JLD |
! Local: |
70 |
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71 |
! Parametres d'entree |
integer knon ! nombre de points \`a traiter |
72 |
integer, intent(IN) :: knon, nisurf, klon |
real, parameter:: snow_max=3000. |
73 |
real , intent(IN) :: dtime |
! Masse maximum de neige (kg / m2). Au dessus de ce seuil, la neige |
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real, dimension(klon), intent(IN) :: petAcoef, peqAcoef |
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real, dimension(klon), intent(IN) :: petBcoef, peqBcoef |
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real, dimension(klon), intent(IN) :: ps, q1lay |
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real, dimension(klon), intent(IN) :: tsurf, p1lay, cal, beta, coef1lay |
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real, dimension(klon), intent(IN) :: precip_rain, precip_snow |
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real, dimension(klon), intent(IN) :: radsol, dif_grnd |
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real, dimension(klon), intent(IN) :: t1lay, u1lay, v1lay |
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real, dimension(klon), intent(INOUT) :: snow, qsol |
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! Parametres sorties |
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real, dimension(klon), intent(INOUT):: tsurf_new, evap, fluxsens, fluxlat |
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real, dimension(klon), intent(INOUT):: dflux_s, dflux_l |
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! Flux thermique utiliser pour fondre la neige |
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real, dimension(klon), intent(INOUT):: ffonte |
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! Flux d'eau "perdue" par la surface et necessaire pour que limiter la |
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! hauteur de neige, en kg/m2/s |
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real, dimension(klon), intent(INOUT):: fqcalving |
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real, dimension(klon), intent(INOUT):: run_off_lic_0 |
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! Variables locales |
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! Masse maximum de neige (kg/m2). Au dessus de ce seuil, la neige |
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74 |
! en exces "s'ecoule" (calving) |
! en exces "s'ecoule" (calving) |
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! real, parameter :: snow_max=1. |
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!IM cf JLD/GK |
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real, parameter :: snow_max=3000. |
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integer :: i |
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real, dimension(klon) :: zx_mh, zx_nh, zx_oh |
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real, dimension(klon) :: zx_mq, zx_nq, zx_oq |
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real, dimension(klon) :: zx_pkh, zx_dq_s_dt, zx_qsat, zx_coef |
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real, dimension(klon) :: zx_sl, zx_k1 |
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real, dimension(klon) :: zx_q_0 , d_ts |
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real :: zdelta, zcvm5, zx_qs, zcor, zx_dq_s_dh |
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real :: bilan_f, fq_fonte |
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REAL :: subli, fsno |
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REAL, DIMENSION(klon) :: bil_eau_s, snow_evap |
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real, parameter :: t_grnd = 271.35, t_coup = 273.15 |
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!! PB temporaire en attendant mieux pour le modele de neige |
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! REAL, parameter :: chasno = RLMLT/(2.3867E+06*0.15) |
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REAL, parameter :: chasno = 3.334E+05/(2.3867E+06*0.15) |
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!IM cf JLD/ GKtest |
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REAL, parameter :: chaice = 3.334E+05/(2.3867E+06*0.15) |
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! fin GKtest |
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logical, save :: check = .FALSE. |
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character (len = 20) :: modname = 'fonte_neige' |
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logical, save :: neige_fond = .false. |
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real, save :: max_eau_sol = 150.0 |
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character (len = 80) :: abort_message |
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logical, save :: first = .true., second=.false. |
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real :: coeff_rel |
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75 |
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76 |
if (check) write(*, *)'Entree ', modname, ' surface = ', nisurf |
integer i |
77 |
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logical zdelta |
78 |
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real zcvm5, zx_qs, zcor |
79 |
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real fq_fonte |
80 |
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REAL bil_eau_s(size(ps)) ! in kg m-2 |
81 |
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real snow_evap(size(ps)) ! in kg m-2 s-1 |
82 |
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real, parameter:: t_coup = 273.15 |
83 |
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REAL, parameter:: chasno = 3.334E5 / (2.3867E6*0.15) |
84 |
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REAL, parameter:: chaice = 3.334E5 / (2.3867E6*0.15) |
85 |
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real, parameter:: max_eau_sol = 150. ! in kg m-2 |
86 |
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real coeff_rel |
87 |
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88 |
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!-------------------------------------------------------------------- |
89 |
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90 |
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knon = assert_eq((/size(tsurf), size(p1lay), size(beta), size(coef1lay), & |
91 |
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size(ps), size(precip_rain), size(precip_snow), size(snow), & |
92 |
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size(qsol), size(t1lay), size(q1lay), size(u1lay), size(v1lay), & |
93 |
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size(petAcoef), size(peqAcoef), size(petBcoef), size(peqBcoef), & |
94 |
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size(tsurf_new), size(evap), size(fqcalving), size(ffonte), & |
95 |
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size(run_off_lic_0)/), "fonte_neige knon") |
96 |
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97 |
! Initialisations |
! Initialisations |
98 |
coeff_rel = dtime/(tau_calv * rday) |
coeff_rel = dtime / (tau_calv * rday) |
99 |
bil_eau_s = 0. |
bil_eau_s = 0. |
100 |
DO i = 1, knon |
DO i = 1, knon |
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zx_pkh(i) = (ps(i)/ps(i))**RKAPPA |
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101 |
IF (thermcep) THEN |
IF (thermcep) THEN |
102 |
zdelta=MAX(0., SIGN(1., rtt-tsurf(i))) |
zdelta= rtt >= tsurf(i) |
103 |
zcvm5 = R5LES*RLVTT*(1.-zdelta) + R5IES*RLSTT*zdelta |
zcvm5 = merge(R5IES*RLSTT, R5LES*RLVTT, zdelta) |
104 |
zcvm5 = zcvm5 / RCPD / (1.0+RVTMP2*q1lay(i)) |
zcvm5 = zcvm5 / RCPD / (1. + RVTMP2*q1lay(i)) |
105 |
zx_qs= r2es * FOEEW(tsurf(i), zdelta)/ps(i) |
zx_qs= r2es * FOEEW(tsurf(i), zdelta) / ps(i) |
106 |
zx_qs=MIN(0.5, zx_qs) |
zx_qs=MIN(0.5, zx_qs) |
107 |
zcor=1./(1.-retv*zx_qs) |
zcor=1. / (1.-retv*zx_qs) |
108 |
zx_qs=zx_qs*zcor |
zx_qs=zx_qs*zcor |
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zx_dq_s_dh = FOEDE(tsurf(i), zdelta, zcvm5, zx_qs, zcor) & |
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/RLVTT / zx_pkh(i) |
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109 |
ELSE |
ELSE |
110 |
IF (tsurf(i).LT.t_coup) THEN |
IF (tsurf(i) < t_coup) THEN |
111 |
zx_qs = qsats(tsurf(i)) / ps(i) |
zx_qs = qsats(tsurf(i)) / ps(i) |
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zx_dq_s_dh = dqsats(tsurf(i), zx_qs)/RLVTT & |
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/ zx_pkh(i) |
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112 |
ELSE |
ELSE |
113 |
zx_qs = qsatl(tsurf(i)) / ps(i) |
zx_qs = qsatl(tsurf(i)) / ps(i) |
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zx_dq_s_dh = dqsatl(tsurf(i), zx_qs)/RLVTT & |
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/ zx_pkh(i) |
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114 |
ENDIF |
ENDIF |
115 |
ENDIF |
ENDIF |
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zx_dq_s_dt(i) = RCPD * zx_pkh(i) * zx_dq_s_dh |
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zx_qsat(i) = zx_qs |
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zx_coef(i) = coef1lay(i) & |
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* (1.0+SQRT(u1lay(i)**2+v1lay(i)**2)) & |
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* p1lay(i)/(RD*t1lay(i)) |
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116 |
ENDDO |
ENDDO |
117 |
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118 |
! === Calcul de la temperature de surface === |
! Calcul de la temperature de surface |
119 |
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120 |
! zx_sl = chaleur latente d'evaporation ou de sublimation |
WHERE (precip_snow > 0.) snow = snow + precip_snow * dtime |
121 |
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122 |
do i = 1, knon |
WHERE (evap > 0.) |
123 |
zx_sl(i) = RLVTT |
snow_evap = MIN(snow / dtime, evap) |
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if (tsurf(i) .LT. RTT) zx_sl(i) = RLSTT |
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zx_k1(i) = zx_coef(i) |
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enddo |
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do i = 1, knon |
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! Q |
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zx_oq(i) = 1. - (beta(i) * zx_k1(i) * peqBcoef(i) * dtime) |
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zx_mq(i) = beta(i) * zx_k1(i) * & |
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(peqAcoef(i) - zx_qsat(i) & |
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+ zx_dq_s_dt(i) * tsurf(i)) & |
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/ zx_oq(i) |
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zx_nq(i) = beta(i) * zx_k1(i) * (-1. * zx_dq_s_dt(i)) & |
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/ zx_oq(i) |
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! H |
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zx_oh(i) = 1. - (zx_k1(i) * petBcoef(i) * dtime) |
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zx_mh(i) = zx_k1(i) * petAcoef(i) / zx_oh(i) |
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zx_nh(i) = - (zx_k1(i) * RCPD * zx_pkh(i))/ zx_oh(i) |
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enddo |
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WHERE (precip_snow > 0.) snow = snow + (precip_snow * dtime) |
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snow_evap = 0. |
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WHERE (evap > 0. ) |
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snow_evap = MIN (snow / dtime, evap) |
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124 |
snow = snow - snow_evap * dtime |
snow = snow - snow_evap * dtime |
125 |
snow = MAX(0.0, snow) |
snow = MAX(0., snow) |
126 |
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elsewhere |
127 |
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snow_evap = 0. |
128 |
end where |
end where |
129 |
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130 |
! bil_eau_s = bil_eau_s + (precip_rain * dtime) - (evap - snow_evap) * dtime |
bil_eau_s = precip_rain * dtime - (evap(:knon) - snow_evap(:knon)) * dtime |
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bil_eau_s = (precip_rain * dtime) - (evap - snow_evap) * dtime |
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131 |
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132 |
! Y'a-t-il fonte de neige? |
! Y a-t-il fonte de neige ? |
133 |
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134 |
ffonte=0. |
ffonte=0. |
135 |
do i = 1, knon |
do i = 1, knon |
136 |
neige_fond = ((snow(i) > epsfra .OR. nisurf == is_sic .OR. nisurf == is_lic) & |
if ((snow(i) > epsfra .OR. nisurf == is_sic & |
137 |
.AND. tsurf_new(i) >= RTT) |
.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
138 |
if (neige_fond) then |
fq_fonte = MIN(MAX((tsurf_new(i)-RTT) / chasno, 0.), snow(i)) |
139 |
fq_fonte = MIN( MAX((tsurf_new(i)-RTT )/chasno, 0.0), snow(i)) |
ffonte(i) = fq_fonte * RLMLT / dtime |
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ffonte(i) = fq_fonte * RLMLT/dtime |
|
140 |
snow(i) = max(0., snow(i) - fq_fonte) |
snow(i) = max(0., snow(i) - fq_fonte) |
141 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
142 |
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 OK |
|
143 |
!IM cf JLD/ GKtest fonte aussi pour la glace |
!IM cf JLD/ GKtest fonte aussi pour la glace |
144 |
IF (nisurf == is_sic .OR. nisurf == is_lic ) THEN |
IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
145 |
fq_fonte = MAX((tsurf_new(i)-RTT )/chaice, 0.0) |
fq_fonte = MAX((tsurf_new(i)-RTT) / chaice, 0.) |
146 |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT/dtime |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtime |
147 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
148 |
tsurf_new(i) = RTT |
tsurf_new(i) = RTT |
149 |
ENDIF |
ENDIF |
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d_ts(i) = tsurf_new(i) - tsurf(i) |
|
150 |
endif |
endif |
151 |
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152 |
! s'il y a une hauteur trop importante de neige, elle s'coule |
! S'il y a une hauteur trop importante de neige, elle s'\'ecoule |
153 |
fqcalving(i) = max(0., snow(i) - snow_max)/dtime |
fqcalving(i) = max(0., snow(i) - snow_max) / dtime |
154 |
snow(i)=min(snow(i), snow_max) |
snow(i)=min(snow(i), snow_max) |
155 |
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|
156 |
IF (nisurf == is_ter) then |
IF (nisurf == is_ter) then |
157 |
qsol(i) = qsol(i) + bil_eau_s(i) |
qsol(i) = qsol(i) + bil_eau_s(i) |
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run_off(i) = run_off(i) + MAX(qsol(i) - max_eau_sol, 0.0) |
|
158 |
qsol(i) = MIN(qsol(i), max_eau_sol) |
qsol(i) = MIN(qsol(i), max_eau_sol) |
159 |
else if (nisurf == is_lic) then |
else if (nisurf == is_lic) then |
160 |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
161 |
(1. - coeff_rel) * run_off_lic_0(i) |
(1. - coeff_rel) * run_off_lic_0(i) |
162 |
run_off_lic_0(i) = run_off_lic(i) |
run_off_lic_0(i) = run_off_lic(i) |
163 |
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) / dtime |
164 |
endif |
endif |
165 |
enddo |
enddo |
166 |
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