4 |
|
|
5 |
contains |
contains |
6 |
|
|
7 |
SUBROUTINE fonte_neige( klon, knon, nisurf, dtime, & |
SUBROUTINE fonte_neige(klon, knon, nisurf, dtime, tsurf, p1lay, beta, & |
8 |
tsurf, p1lay, cal, beta, coef1lay, ps, & |
coef1lay, ps, precip_rain, precip_snow, snow, qsol, t1lay, q1lay, & |
9 |
precip_rain, precip_snow, snow, qsol, & |
u1lay, v1lay, petAcoef, peqAcoef, petBcoef, peqBcoef, tsurf_new, evap, & |
|
radsol, dif_grnd, t1lay, q1lay, u1lay, v1lay, & |
|
|
petAcoef, peqAcoef, petBcoef, peqBcoef, & |
|
|
tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l, & |
|
10 |
fqcalving, ffonte, run_off_lic_0) |
fqcalving, ffonte, run_off_lic_0) |
11 |
|
|
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 simplifié |
14 |
|
|
15 |
! LF 03/2001 |
! LF 03/2001 |
16 |
! input: |
|
17 |
! knon nombre de points a traiter |
USE fcttre, ONLY: dqsatl, dqsats, foede, foeew, qsatl, qsats, thermcep |
18 |
! nisurf surface a traiter |
USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter |
19 |
|
USE interface_surf, ONLY: run_off, run_off_lic, tau_calv |
20 |
|
USE suphec_m, ONLY: rcpd, rd, rday, retv, rkappa, rlmlt, rlstt, rlvtt, rtt |
21 |
|
USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 |
22 |
|
|
23 |
|
integer, intent(IN):: klon |
24 |
|
integer, intent(IN):: knon ! nombre de points à traiter |
25 |
|
integer, intent(IN):: nisurf ! surface à traiter |
26 |
|
real, intent(IN):: dtime ! pas de temps de la physique (en s) |
27 |
|
real, dimension(klon), intent(IN):: tsurf, p1lay, beta, coef1lay |
28 |
! tsurf temperature de surface |
! tsurf temperature de surface |
29 |
! p1lay pression 1er niveau (milieu de couche) |
! p1lay pression 1er niveau (milieu de couche) |
|
! cal capacite calorifique du sol |
|
30 |
! beta evap reelle |
! beta evap reelle |
31 |
! coef1lay coefficient d'echange |
! coef1lay coefficient d'echange |
32 |
|
real, dimension(klon), intent(IN):: ps |
33 |
! ps pression au sol |
! ps pression au sol |
34 |
! precip_rain precipitations liquides |
|
35 |
! precip_snow precipitations solides |
real, intent(IN):: precip_rain(:) ! (knon) |
36 |
! snow champs hauteur de neige |
! precipitation, liquid water mass flux (kg/m2/s), positive down |
37 |
! qsol hauteur d'eau contenu dans le sol |
|
38 |
! runoff runoff en cas de trop plein |
real, intent(IN):: precip_snow(klon) |
39 |
|
! precipitation, solid water mass flux (kg/m2/s), positive down |
40 |
|
|
41 |
|
real, intent(INOUT):: snow(klon) ! column-density of mass of snow, in kg m-2 |
42 |
|
|
43 |
|
real, intent(INOUT):: qsol(:) ! (knon) |
44 |
|
! column-density of water in soil, in kg m-2 |
45 |
|
|
46 |
|
real, dimension(klon), intent(IN):: t1lay |
47 |
|
real, dimension(klon), intent(IN):: q1lay |
48 |
|
real, dimension(klon), intent(IN):: u1lay, v1lay |
49 |
|
real, dimension(klon), intent(IN):: petAcoef, peqAcoef |
50 |
! petAcoef coeff. A de la resolution de la CL pour t |
! petAcoef coeff. A de la resolution de la CL pour t |
51 |
! peqAcoef coeff. A de la resolution de la CL pour q |
! peqAcoef coeff. A de la resolution de la CL pour q |
52 |
|
real, dimension(klon), intent(IN):: petBcoef, peqBcoef |
53 |
! petBcoef coeff. B de la resolution de la CL pour t |
! petBcoef coeff. B de la resolution de la CL pour t |
54 |
! peqBcoef coeff. B de la resolution de la CL pour q |
! peqBcoef coeff. B de la resolution de la CL pour q |
|
! radsol rayonnement net aus sol (LW + SW) |
|
|
! dif_grnd coeff. diffusion vers le sol profond |
|
55 |
|
|
56 |
! output: |
real, intent(INOUT):: tsurf_new(klon), evap(klon) |
57 |
! tsurf_new temperature au sol |
! tsurf_new temperature au sol |
|
! fluxsens flux de chaleur sensible |
|
|
! fluxlat flux de chaleur latente |
|
|
! dflux_s derivee du flux de chaleur sensible / Ts |
|
|
! dflux_l derivee du flux de chaleur latente / Ts |
|
|
! in/out: |
|
|
! run_off_lic_0 run off glacier du pas de temps précedent |
|
|
|
|
58 |
|
|
|
use indicesol |
|
|
use SUPHEC_M |
|
|
use yoethf_m |
|
|
use fcttre |
|
|
use interface_surf |
|
|
!IM cf JLD |
|
|
|
|
|
! Parametres d'entree |
|
|
integer, intent(IN) :: knon, nisurf, klon |
|
|
real , intent(IN) :: dtime |
|
|
real, dimension(klon), intent(IN) :: petAcoef, peqAcoef |
|
|
real, dimension(klon), intent(IN) :: petBcoef, peqBcoef |
|
|
real, dimension(klon), intent(IN) :: ps, q1lay |
|
|
real, dimension(klon), intent(IN) :: tsurf, p1lay, cal, beta, coef1lay |
|
|
real, dimension(klon), intent(IN) :: precip_rain, precip_snow |
|
|
real, dimension(klon), intent(IN) :: radsol, dif_grnd |
|
|
real, dimension(klon), intent(IN) :: t1lay, u1lay, v1lay |
|
|
real, dimension(klon), intent(INOUT) :: snow, qsol |
|
|
|
|
|
! Parametres sorties |
|
|
real, dimension(klon), intent(INOUT):: tsurf_new, evap, fluxsens, fluxlat |
|
|
real, dimension(klon), intent(INOUT):: dflux_s, dflux_l |
|
|
! Flux thermique utiliser pour fondre la neige |
|
|
real, dimension(klon), intent(INOUT):: ffonte |
|
59 |
! Flux d'eau "perdue" par la surface et necessaire pour que limiter la |
! Flux d'eau "perdue" par la surface et necessaire pour que limiter la |
60 |
! hauteur de neige, en kg/m2/s |
! hauteur de neige, en kg/m2/s |
61 |
real, dimension(klon), intent(INOUT):: fqcalving |
real, dimension(klon), intent(INOUT):: fqcalving |
62 |
|
|
63 |
|
! Flux thermique utiliser pour fondre la neige |
64 |
|
real, dimension(klon), intent(INOUT):: ffonte |
65 |
|
|
66 |
real, dimension(klon), intent(INOUT):: run_off_lic_0 |
real, dimension(klon), intent(INOUT):: run_off_lic_0 |
67 |
! Variables locales |
! run_off_lic_0 run off glacier du pas de temps précedent |
68 |
|
|
69 |
|
! Local: |
70 |
|
|
71 |
|
real, parameter:: snow_max=3000. |
72 |
! 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 |
73 |
! en exces "s'ecoule" (calving) |
! en exces "s'ecoule" (calving) |
|
! real, parameter :: snow_max=1. |
|
|
!IM cf JLD/GK |
|
|
real, parameter :: snow_max=3000. |
|
|
integer :: i |
|
|
real, dimension(klon) :: zx_mh, zx_nh, zx_oh |
|
|
real, dimension(klon) :: zx_mq, zx_nq, zx_oq |
|
|
real, dimension(klon) :: zx_pkh, zx_dq_s_dt, zx_qsat, zx_coef |
|
|
real, dimension(klon) :: zx_sl, zx_k1 |
|
|
real, dimension(klon) :: zx_q_0 , d_ts |
|
|
real :: zdelta, zcvm5, zx_qs, zcor, zx_dq_s_dh |
|
|
real :: bilan_f, fq_fonte |
|
|
REAL :: subli, fsno |
|
|
REAL, DIMENSION(klon) :: bil_eau_s, snow_evap |
|
|
real, parameter :: t_grnd = 271.35, t_coup = 273.15 |
|
|
!! PB temporaire en attendant mieux pour le modele de neige |
|
|
! REAL, parameter :: chasno = RLMLT/(2.3867E+06*0.15) |
|
|
REAL, parameter :: chasno = 3.334E+05/(2.3867E+06*0.15) |
|
|
!IM cf JLD/ GKtest |
|
|
REAL, parameter :: chaice = 3.334E+05/(2.3867E+06*0.15) |
|
|
! fin GKtest |
|
|
|
|
|
logical, save :: check = .FALSE. |
|
|
character (len = 20) :: modname = 'fonte_neige' |
|
|
logical, save :: neige_fond = .false. |
|
|
real, save :: max_eau_sol = 150.0 |
|
|
character (len = 80) :: abort_message |
|
|
logical, save :: first = .true., second=.false. |
|
|
real :: coeff_rel |
|
74 |
|
|
75 |
if (check) write(*, *)'Entree ', modname, ' surface = ', nisurf |
integer i |
76 |
|
real, dimension(klon):: zx_mh, zx_nh, zx_oh |
77 |
|
real, dimension(klon):: zx_mq, zx_nq, zx_oq |
78 |
|
real, dimension(klon):: zx_pkh, zx_dq_s_dt, zx_qsat, zx_coef |
79 |
|
real, dimension(klon):: zx_sl, zx_k1 |
80 |
|
real, dimension(klon):: d_ts |
81 |
|
logical zdelta |
82 |
|
real zcvm5, zx_qs, zcor, zx_dq_s_dh |
83 |
|
real fq_fonte |
84 |
|
REAL bil_eau_s(knon) ! in kg m-2 |
85 |
|
real snow_evap(klon) ! in kg m-2 s-1 |
86 |
|
real, parameter:: t_grnd = 271.35, t_coup = 273.15 |
87 |
|
REAL, parameter:: chasno = 3.334E5/(2.3867E6*0.15) |
88 |
|
REAL, parameter:: chaice = 3.334E5/(2.3867E6*0.15) |
89 |
|
real, parameter:: max_eau_sol = 150. ! in kg m-2 |
90 |
|
real coeff_rel |
91 |
|
|
92 |
|
!-------------------------------------------------------------------- |
93 |
|
|
94 |
! Initialisations |
! Initialisations |
95 |
coeff_rel = dtime/(tau_calv * rday) |
coeff_rel = dtime/(tau_calv * rday) |
97 |
DO i = 1, knon |
DO i = 1, knon |
98 |
zx_pkh(i) = (ps(i)/ps(i))**RKAPPA |
zx_pkh(i) = (ps(i)/ps(i))**RKAPPA |
99 |
IF (thermcep) THEN |
IF (thermcep) THEN |
100 |
zdelta=MAX(0., SIGN(1., rtt-tsurf(i))) |
zdelta= rtt >= tsurf(i) |
101 |
zcvm5 = R5LES*RLVTT*(1.-zdelta) + R5IES*RLSTT*zdelta |
zcvm5 = merge(R5IES*RLSTT, R5LES*RLVTT, zdelta) |
102 |
zcvm5 = zcvm5 / RCPD / (1.0+RVTMP2*q1lay(i)) |
zcvm5 = zcvm5 / RCPD / (1. + RVTMP2*q1lay(i)) |
103 |
zx_qs= r2es * FOEEW(tsurf(i), zdelta)/ps(i) |
zx_qs= r2es * FOEEW(tsurf(i), zdelta)/ps(i) |
104 |
zx_qs=MIN(0.5, zx_qs) |
zx_qs=MIN(0.5, zx_qs) |
105 |
zcor=1./(1.-retv*zx_qs) |
zcor=1./(1.-retv*zx_qs) |
106 |
zx_qs=zx_qs*zcor |
zx_qs=zx_qs*zcor |
107 |
zx_dq_s_dh = FOEDE(tsurf(i), zdelta, zcvm5, zx_qs, zcor) & |
zx_dq_s_dh = FOEDE(tsurf(i), zdelta, zcvm5, zx_qs, zcor) /RLVTT & |
108 |
/RLVTT / zx_pkh(i) |
/ zx_pkh(i) |
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) |
112 |
zx_dq_s_dh = dqsats(tsurf(i), zx_qs)/RLVTT & |
zx_dq_s_dh = dqsats(tsurf(i), zx_qs)/RLVTT / zx_pkh(i) |
|
/ zx_pkh(i) |
|
113 |
ELSE |
ELSE |
114 |
zx_qs = qsatl(tsurf(i)) / ps(i) |
zx_qs = qsatl(tsurf(i)) / ps(i) |
115 |
zx_dq_s_dh = dqsatl(tsurf(i), zx_qs)/RLVTT & |
zx_dq_s_dh = dqsatl(tsurf(i), zx_qs)/RLVTT / zx_pkh(i) |
|
/ zx_pkh(i) |
|
116 |
ENDIF |
ENDIF |
117 |
ENDIF |
ENDIF |
118 |
zx_dq_s_dt(i) = RCPD * zx_pkh(i) * zx_dq_s_dh |
zx_dq_s_dt(i) = RCPD * zx_pkh(i) * zx_dq_s_dh |
119 |
zx_qsat(i) = zx_qs |
zx_qsat(i) = zx_qs |
120 |
zx_coef(i) = coef1lay(i) & |
zx_coef(i) = coef1lay(i) * (1. + SQRT(u1lay(i)**2 + v1lay(i)**2)) & |
121 |
* (1.0+SQRT(u1lay(i)**2+v1lay(i)**2)) & |
* p1lay(i) / (RD * t1lay(i)) |
|
* p1lay(i)/(RD*t1lay(i)) |
|
122 |
ENDDO |
ENDDO |
123 |
|
|
124 |
! === Calcul de la temperature de surface === |
! Calcul de la temperature de surface |
125 |
|
|
126 |
! zx_sl = chaleur latente d'evaporation ou de sublimation |
! zx_sl = chaleur latente d'evaporation ou de sublimation |
127 |
|
|
128 |
do i = 1, knon |
do i = 1, knon |
129 |
zx_sl(i) = RLVTT |
zx_sl(i) = RLVTT |
130 |
if (tsurf(i) .LT. RTT) zx_sl(i) = RLSTT |
if (tsurf(i) < RTT) zx_sl(i) = RLSTT |
131 |
zx_k1(i) = zx_coef(i) |
zx_k1(i) = zx_coef(i) |
132 |
enddo |
enddo |
133 |
|
|
134 |
do i = 1, knon |
do i = 1, knon |
135 |
! Q |
! Q |
136 |
zx_oq(i) = 1. - (beta(i) * zx_k1(i) * peqBcoef(i) * dtime) |
zx_oq(i) = 1. - (beta(i) * zx_k1(i) * peqBcoef(i) * dtime) |
137 |
zx_mq(i) = beta(i) * zx_k1(i) * & |
zx_mq(i) = beta(i) * zx_k1(i) * (peqAcoef(i) - zx_qsat(i) & |
138 |
(peqAcoef(i) - zx_qsat(i) & |
+ zx_dq_s_dt(i) * tsurf(i)) / zx_oq(i) |
139 |
+ zx_dq_s_dt(i) * tsurf(i)) & |
zx_nq(i) = beta(i) * zx_k1(i) * (-1. * zx_dq_s_dt(i)) / zx_oq(i) |
|
/ zx_oq(i) |
|
|
zx_nq(i) = beta(i) * zx_k1(i) * (-1. * zx_dq_s_dt(i)) & |
|
|
/ zx_oq(i) |
|
140 |
|
|
141 |
! H |
! H |
142 |
zx_oh(i) = 1. - (zx_k1(i) * petBcoef(i) * dtime) |
zx_oh(i) = 1. - (zx_k1(i) * petBcoef(i) * dtime) |
144 |
zx_nh(i) = - (zx_k1(i) * RCPD * zx_pkh(i))/ zx_oh(i) |
zx_nh(i) = - (zx_k1(i) * RCPD * zx_pkh(i))/ zx_oh(i) |
145 |
enddo |
enddo |
146 |
|
|
147 |
WHERE (precip_snow > 0.) snow = snow + (precip_snow * dtime) |
WHERE (precip_snow > 0.) snow = snow + precip_snow * dtime |
148 |
snow_evap = 0. |
|
149 |
WHERE (evap > 0. ) |
WHERE (evap > 0.) |
150 |
snow_evap = MIN (snow / dtime, evap) |
snow_evap = MIN (snow / dtime, evap) |
151 |
snow = snow - snow_evap * dtime |
snow = snow - snow_evap * dtime |
152 |
snow = MAX(0.0, snow) |
snow = MAX(0., snow) |
153 |
|
elsewhere |
154 |
|
snow_evap = 0. |
155 |
end where |
end where |
156 |
|
|
157 |
! 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 |
|
bil_eau_s = (precip_rain * dtime) - (evap - snow_evap) * dtime |
|
|
|
|
158 |
|
|
159 |
! Y'a-t-il fonte de neige? |
! Y'a-t-il fonte de neige? |
160 |
|
|
161 |
ffonte=0. |
ffonte=0. |
162 |
do i = 1, knon |
do i = 1, knon |
163 |
neige_fond = ((snow(i) > epsfra .OR. nisurf == is_sic .OR. nisurf == is_lic) & |
if ((snow(i) > epsfra .OR. nisurf == is_sic & |
164 |
.AND. tsurf_new(i) >= RTT) |
.OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then |
165 |
if (neige_fond) then |
fq_fonte = MIN(MAX((tsurf_new(i)-RTT)/chasno, 0.), snow(i)) |
|
fq_fonte = MIN( MAX((tsurf_new(i)-RTT )/chasno, 0.0), snow(i)) |
|
166 |
ffonte(i) = fq_fonte * RLMLT/dtime |
ffonte(i) = fq_fonte * RLMLT/dtime |
167 |
snow(i) = max(0., snow(i) - fq_fonte) |
snow(i) = max(0., snow(i) - fq_fonte) |
168 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
169 |
tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno |
|
!IM cf JLD OK |
|
170 |
!IM cf JLD/ GKtest fonte aussi pour la glace |
!IM cf JLD/ GKtest fonte aussi pour la glace |
171 |
IF (nisurf == is_sic .OR. nisurf == is_lic ) THEN |
IF (nisurf == is_sic .OR. nisurf == is_lic) THEN |
172 |
fq_fonte = MAX((tsurf_new(i)-RTT )/chaice, 0.0) |
fq_fonte = MAX((tsurf_new(i)-RTT)/chaice, 0.) |
173 |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT/dtime |
ffonte(i) = ffonte(i) + fq_fonte * RLMLT/dtime |
174 |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
bil_eau_s(i) = bil_eau_s(i) + fq_fonte |
175 |
tsurf_new(i) = RTT |
tsurf_new(i) = RTT |
177 |
d_ts(i) = tsurf_new(i) - tsurf(i) |
d_ts(i) = tsurf_new(i) - tsurf(i) |
178 |
endif |
endif |
179 |
|
|
180 |
! 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'écoule |
181 |
fqcalving(i) = max(0., snow(i) - snow_max)/dtime |
fqcalving(i) = max(0., snow(i) - snow_max)/dtime |
182 |
snow(i)=min(snow(i), snow_max) |
snow(i)=min(snow(i), snow_max) |
183 |
|
|
184 |
IF (nisurf == is_ter) then |
IF (nisurf == is_ter) then |
185 |
qsol(i) = qsol(i) + bil_eau_s(i) |
qsol(i) = qsol(i) + bil_eau_s(i) |
186 |
run_off(i) = run_off(i) + MAX(qsol(i) - max_eau_sol, 0.0) |
run_off(i) = run_off(i) + MAX(qsol(i) - max_eau_sol, 0.) |
187 |
qsol(i) = MIN(qsol(i), max_eau_sol) |
qsol(i) = MIN(qsol(i), max_eau_sol) |
188 |
else if (nisurf == is_lic) then |
else if (nisurf == is_lic) then |
189 |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |
run_off_lic(i) = (coeff_rel * fqcalving(i)) + & |