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 simplifi\'e |
! de sol simplifi\'e |
14 |
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15 |
! LF 03/2001 |
! Laurent Fairhead, March, 2001 |
16 |
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17 |
USE fcttre, ONLY: foeew, qsatl, qsats, thermcep |
USE fcttre, ONLY: foeew, qsatl, qsats |
18 |
USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
19 |
USE interface_surf, ONLY: run_off, run_off_lic, tau_calv |
USE interface_surf, ONLY: run_off_lic, tau_calv |
20 |
use nr_util, only: assert_eq |
use nr_util, only: assert_eq |
21 |
USE suphec_m, ONLY: rcpd, rday, retv, rlmlt, rlstt, rlvtt, rtt |
USE suphec_m, ONLY: rcpd, rday, retv, rlmlt, rlstt, rlvtt, rtt |
22 |
USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 |
USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 |
23 |
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24 |
integer, intent(IN):: nisurf ! surface \`a traiter |
integer, intent(IN):: nisurf ! surface \`a traiter |
25 |
real, intent(IN):: dtime ! pas de temps de la physique (en s) |
real, intent(IN):: dtime ! pas de temps de la physique (en s) |
26 |
real, dimension(:), intent(IN):: tsurf, p1lay, beta, coef1lay ! (knon) |
real, intent(IN):: tsurf(:) ! (knon) temperature de surface |
27 |
! tsurf temperature de surface |
real, intent(IN):: p1lay(:) ! (knon) pression 1er niveau (milieu de couche) |
28 |
! p1lay pression 1er niveau (milieu de couche) |
real, intent(IN):: beta(:) ! (knon) evap reelle |
29 |
! beta evap reelle |
real, intent(IN):: coef1lay(:) ! (knon) coefficient d'echange |
30 |
! coef1lay coefficient d'echange |
real, intent(IN):: ps(:) ! (knon) pression au sol |
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real, dimension(:), intent(IN):: ps ! (knon) |
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! ps pression au sol |
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31 |
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32 |
real, intent(IN):: precip_rain(:) ! (knon) |
real, intent(IN):: precip_rain(:) ! (knon) |
33 |
! precipitation, liquid water mass flux (kg/m2/s), positive down |
! precipitation, liquid water mass flux (kg / m2 / s), positive down |
34 |
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35 |
real, intent(IN):: precip_snow(:) ! (knon) |
real, intent(IN):: precip_snow(:) ! (knon) |
36 |
! precipitation, solid water mass flux (kg/m2/s), positive down |
! precipitation, solid water mass flux (kg / m2 / s), positive down |
37 |
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38 |
real, intent(INOUT):: snow(:) ! (knon) |
real, intent(INOUT):: snow(:) ! (knon) |
39 |
! column-density of mass of snow, in kg m-2 |
! column-density of mass of snow, in kg m-2 |
41 |
real, intent(INOUT):: qsol(:) ! (knon) |
real, intent(INOUT):: qsol(:) ! (knon) |
42 |
! column-density of water in soil, in kg m-2 |
! column-density of water in soil, in kg m-2 |
43 |
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44 |
real, dimension(:), intent(IN):: t1lay ! (knon) |
real, intent(IN):: t1lay(:) ! (knon) |
45 |
real, dimension(:), intent(IN):: q1lay ! (knon) |
real, intent(IN):: q1lay(:) ! (knon) |
46 |
real, dimension(:), intent(IN):: u1lay, v1lay ! (knon) |
real, intent(IN):: u1lay(:), v1lay(:) ! (knon) |
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real, dimension(:), intent(IN):: petAcoef, peqAcoef ! (knon) |
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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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real, dimension(:), intent(IN):: petBcoef, peqBcoef ! (knon) |
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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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47 |
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48 |
real, intent(INOUT):: tsurf_new(:) |
real, intent(IN):: petAcoef(:), peqAcoef(:) ! (knon) |
49 |
! tsurf_new temperature au sol |
! 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(:) ! (knon) temp\'erature au sol |
55 |
real, intent(IN):: evap(:) ! (knon) |
real, intent(IN):: evap(:) ! (knon) |
56 |
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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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57 |
real, intent(OUT):: fqcalving(:) ! (knon) |
real, intent(OUT):: fqcalving(:) ! (knon) |
58 |
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! flux d'eau "perdue" par la surface et n\'ecessaire pour limiter la |
59 |
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! hauteur de neige, en kg / m2 / s |
60 |
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! Flux thermique utiliser pour fondre la neige |
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61 |
real, intent(OUT):: ffonte(:) ! (knon) |
real, intent(OUT):: ffonte(:) ! (knon) |
62 |
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! flux thermique utilis\'é pour fondre la neige |
63 |
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64 |
real, dimension(:), intent(INOUT):: run_off_lic_0 ! (knon) |
real, intent(INOUT):: run_off_lic_0(:) ! (knon) |
65 |
! run_off_lic_0 run off glacier du pas de temps pr\'ecedent |
! run off glacier du pas de temps pr\'ecedent |
66 |
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67 |
! Local: |
! Local: |
68 |
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69 |
integer knon ! nombre de points \`a traiter |
integer knon ! nombre de points \`a traiter |
70 |
real, parameter:: snow_max=3000. |
real, parameter:: snow_max=3000. |
71 |
! Masse maximum de neige (kg/m2). Au dessus de ce seuil, la neige |
! Masse maximum de neige (kg / m2). Au dessus de ce seuil, la neige |
72 |
! en exces "s'ecoule" (calving) |
! en exces "s'ecoule" (calving) |
73 |
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74 |
integer i |
integer i |
77 |
real fq_fonte |
real fq_fonte |
78 |
REAL bil_eau_s(size(ps)) ! in kg m-2 |
REAL bil_eau_s(size(ps)) ! in kg m-2 |
79 |
real snow_evap(size(ps)) ! in kg m-2 s-1 |
real snow_evap(size(ps)) ! in kg m-2 s-1 |
80 |
real, parameter:: t_coup = 273.15 |
REAL, parameter:: chasno = 3.334E5 / (2.3867E6*0.15) |
81 |
REAL, parameter:: chasno = 3.334E5/(2.3867E6*0.15) |
REAL, parameter:: chaice = 3.334E5 / (2.3867E6*0.15) |
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REAL, parameter:: chaice = 3.334E5/(2.3867E6*0.15) |
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82 |
real, parameter:: max_eau_sol = 150. ! in kg m-2 |
real, parameter:: max_eau_sol = 150. ! in kg m-2 |
83 |
real coeff_rel |
real coeff_rel |
84 |
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92 |
size(run_off_lic_0)/), "fonte_neige knon") |
size(run_off_lic_0)/), "fonte_neige knon") |
93 |
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94 |
! Initialisations |
! Initialisations |
95 |
coeff_rel = dtime/(tau_calv * rday) |
coeff_rel = dtime / (tau_calv * rday) |
96 |
bil_eau_s = 0. |
bil_eau_s = 0. |
97 |
DO i = 1, knon |
DO i = 1, knon |
98 |
IF (thermcep) THEN |
zdelta= rtt >= tsurf(i) |
99 |
zdelta= rtt >= tsurf(i) |
zcvm5 = merge(R5IES*RLSTT, R5LES*RLVTT, zdelta) |
100 |
zcvm5 = merge(R5IES*RLSTT, R5LES*RLVTT, zdelta) |
zcvm5 = zcvm5 / RCPD / (1. + RVTMP2*q1lay(i)) |
101 |
zcvm5 = zcvm5 / RCPD / (1. + RVTMP2*q1lay(i)) |
zx_qs= r2es * FOEEW(tsurf(i), zdelta) / ps(i) |
102 |
zx_qs= r2es * FOEEW(tsurf(i), zdelta)/ps(i) |
zx_qs=MIN(0.5, zx_qs) |
103 |
zx_qs=MIN(0.5, zx_qs) |
zcor=1. / (1. - retv*zx_qs) |
104 |
zcor=1./(1.-retv*zx_qs) |
zx_qs=zx_qs*zcor |
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zx_qs=zx_qs*zcor |
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ELSE |
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IF (tsurf(i) < t_coup) THEN |
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zx_qs = qsats(tsurf(i)) / ps(i) |
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ELSE |
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zx_qs = qsatl(tsurf(i)) / ps(i) |
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ENDIF |
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ENDIF |
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105 |
ENDDO |
ENDDO |
106 |
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107 |
! Calcul de la temperature de surface |
! Calcul de la temperature de surface |
118 |
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119 |
bil_eau_s = precip_rain * dtime - (evap(:knon) - snow_evap(:knon)) * dtime |
bil_eau_s = precip_rain * dtime - (evap(:knon) - snow_evap(:knon)) * dtime |
120 |
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121 |
! Y'a-t-il fonte de neige? |
! Y a-t-il fonte de neige ? |
122 |
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123 |
ffonte=0. |
ffonte=0. |
124 |
do i = 1, knon |
do i = 1, knon |
125 |
if ((snow(i) > epsfra .OR. nisurf == is_sic & |
if ((snow(i) > epsfra .OR. nisurf == is_sic & |
126 |
.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
127 |
fq_fonte = MIN(MAX((tsurf_new(i)-RTT)/chasno, 0.), snow(i)) |
fq_fonte = MIN(MAX((tsurf_new(i) - RTT) / chasno, 0.), snow(i)) |
128 |
ffonte(i) = fq_fonte * RLMLT/dtime |
ffonte(i) = fq_fonte * RLMLT / dtime |
129 |
snow(i) = max(0., snow(i) - fq_fonte) |
snow(i) = max(0., snow(i) - fq_fonte) |
130 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
131 |
tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
132 |
!IM cf JLD/ GKtest fonte aussi pour la glace |
!IM cf JLD/ GKtest fonte aussi pour la glace |
133 |
IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
134 |
fq_fonte = MAX((tsurf_new(i)-RTT)/chaice, 0.) |
fq_fonte = MAX((tsurf_new(i) - RTT) / chaice, 0.) |
135 |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT/dtime |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtime |
136 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
137 |
tsurf_new(i) = RTT |
tsurf_new(i) = RTT |
138 |
ENDIF |
ENDIF |
139 |
endif |
endif |
140 |
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141 |
! 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 |
142 |
fqcalving(i) = max(0., snow(i) - snow_max)/dtime |
fqcalving(i) = max(0., snow(i) - snow_max) / dtime |
143 |
snow(i)=min(snow(i), snow_max) |
snow(i)=min(snow(i), snow_max) |
144 |
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145 |
IF (nisurf == is_ter) then |
IF (nisurf == is_ter) then |
146 |
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.) |
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147 |
qsol(i) = MIN(qsol(i), max_eau_sol) |
qsol(i) = MIN(qsol(i), max_eau_sol) |
148 |
else if (nisurf == is_lic) then |
else if (nisurf == is_lic) then |
149 |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
150 |
(1. - coeff_rel) * run_off_lic_0(i) |
(1. - coeff_rel) * run_off_lic_0(i) |
151 |
run_off_lic_0(i) = run_off_lic(i) |
run_off_lic_0(i) = run_off_lic(i) |
152 |
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 |
153 |
endif |
endif |
154 |
enddo |
enddo |
155 |
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