1 | !$Id $ |
---|
2 | |
---|
3 | SUBROUTINE lsc_scav(pdtime, it, iflag_lscav, aerosol, & |
---|
4 | oliq, flxr, flxs, rneb, beta_fisrt, & |
---|
5 | beta_v1, pplay, paprs, t, tr_seri, & |
---|
6 | d_tr_insc, d_tr_bcscav, d_tr_evap, qPrls) |
---|
7 | USE ioipsl |
---|
8 | USE dimphy |
---|
9 | USE lmdz_grid_phy |
---|
10 | USE lmdz_phys_para |
---|
11 | USE traclmdz_mod |
---|
12 | USE infotrac_phy, ONLY: nbtr |
---|
13 | USE iophy |
---|
14 | USE lmdz_YOECUMF |
---|
15 | USE lmdz_yomcst |
---|
16 | USE lmdz_chem, ONLY: idms, iso2, iso4, ih2s, idmso, imsa, ih2o2, & |
---|
17 | n_avogadro, masse_s, masse_so4, rho_water, rho_ice |
---|
18 | |
---|
19 | IMPLICIT NONE |
---|
20 | !===================================================================== |
---|
21 | ! Objet : depot humide (lessivage et evaporation) de traceurs |
---|
22 | ! Inspired by routines of Olivier Boucher (mars 1998) |
---|
23 | ! author R. Pilon 10 octobre 2012 |
---|
24 | ! last modification 16/01/2013 (reformulation partie evaporation) |
---|
25 | !===================================================================== |
---|
26 | |
---|
27 | ! inputs |
---|
28 | REAL, INTENT(IN) :: pdtime ! time step (s) |
---|
29 | INTEGER, INTENT(IN) :: it ! tracer number |
---|
30 | INTEGER, INTENT(IN) :: iflag_lscav ! LS scavenging param: 3=Reddy_Boucher2004, 4=3+RPilon. |
---|
31 | REAL, DIMENSION(klon, klev + 1), INTENT(IN) :: flxr ! flux precipitant de pluie |
---|
32 | REAL, DIMENSION(klon, klev + 1), INTENT(IN) :: flxs ! flux precipitant de neige |
---|
33 | REAL, INTENT(IN) :: oliq ! contenu en eau liquide dans le nuage (kg/kg) |
---|
34 | REAL, DIMENSION(klon, klev), INTENT(IN) :: rneb |
---|
35 | REAL, DIMENSION(klon, klev), INTENT(IN) :: pplay ! pression |
---|
36 | REAL, DIMENSION(klon, klev + 1), INTENT(IN) :: paprs ! pression |
---|
37 | REAL, DIMENSION(klon, klev), INTENT(IN) :: t ! temperature |
---|
38 | ! tracers |
---|
39 | LOGICAL, DIMENSION(nbtr), INTENT(IN) :: aerosol |
---|
40 | REAL, DIMENSION(klon, klev, nbtr), INTENT(IN) :: tr_seri ! q de traceur |
---|
41 | REAL, DIMENSION(klon, klev), INTENT(IN) :: beta_fisrt ! taux de conversion de l'eau cond |
---|
42 | REAL, DIMENSION(klon, klev), INTENT(OUT) :: beta_v1 ! -- (originale version) |
---|
43 | REAL, DIMENSION(klon) :: his_dh ! tendance de traceur integre verticalement |
---|
44 | REAL, DIMENSION(klon, klev, nbtr), INTENT(OUT) :: d_tr_insc ! tendance du traceur |
---|
45 | REAL, DIMENSION(klon, klev, nbtr), INTENT(OUT) :: d_tr_bcscav ! tendance de traceur |
---|
46 | REAL, DIMENSION(klon, klev, nbtr), INTENT(OUT) :: d_tr_evap |
---|
47 | REAL, DIMENSION(klon, nbtr), INTENT(OUT) :: qPrls !jyg: concentration tra dans pluie LS a la surf. |
---|
48 | REAL :: dxin, dxev ! tendance temporaire de traceur incloud |
---|
49 | REAL, DIMENSION(klon, klev) :: dxbc ! tendance temporaire de traceur bc |
---|
50 | |
---|
51 | ! variables locales |
---|
52 | LOGICAL, SAVE :: debut = .TRUE. |
---|
53 | !$OMP THREADPRIVATE(debut) |
---|
54 | |
---|
55 | REAL, PARAMETER :: henry = 1.4 ! constante de Henry en mol/l/atm ~1.4 for gases |
---|
56 | REAL :: henry_t ! constante de Henry a T t (mol/l/atm) |
---|
57 | REAL, PARAMETER :: kk = 2900. ! coefficient de dependence en T (K) |
---|
58 | REAL :: f_a ! rapport de la phase aqueuse a la phase gazeuse |
---|
59 | REAL :: beta ! taux de conversion de l'eau en pluie |
---|
60 | |
---|
61 | INTEGER :: i, k |
---|
62 | REAL, DIMENSION(klon, klev) :: scav ! water liquid content / fraction aqueuse du constituant |
---|
63 | REAL, DIMENSION(klon, klev) :: zrho |
---|
64 | REAL, DIMENSION(klon, klev) :: zdz |
---|
65 | REAL, DIMENSION(klon, klev) :: zmass ! layer mass |
---|
66 | |
---|
67 | REAL :: frac_ev ! cste pour la reevaporation : dropplet shrinking |
---|
68 | ! frac_ev = frac_gas ou frac_aer |
---|
69 | REAL, PARAMETER :: frac_gas = 1.0 ! cste pour la reevaporation pour les gaz |
---|
70 | REAL, SAVE :: frac_aer ! cste pour la reevaporation pour les particules |
---|
71 | REAL, DIMENSION(klon, klev) :: deltaP ! P(i+1)-P(i) |
---|
72 | REAL, DIMENSION(klon, klev) :: beta_ev ! dP/P(i+1) |
---|
73 | !$OMP THREADPRIVATE(frac_aer) |
---|
74 | |
---|
75 | ! 101.325 m3/l x Pa/atm |
---|
76 | ! R Pa.m3/mol/K |
---|
77 | ! cste de dissolution pour le depot humide |
---|
78 | REAL, SAVE :: frac_fine_scav |
---|
79 | REAL, SAVE :: frac_coar_scav |
---|
80 | !$OMP THREADPRIVATE(frac_fine_scav, frac_coar_scav) |
---|
81 | |
---|
82 | ! below-cloud scav variables |
---|
83 | ! aerosol : alpha_r=0.001, gas 0.001 (Pruppacher & Klett 1967) |
---|
84 | REAL, SAVE :: alpha_r ! coefficient d'impaction pour la pluie |
---|
85 | REAL, SAVE :: alpha_s ! coefficient d'impaction pour la neige |
---|
86 | REAL, SAVE :: R_r ! mean raindrop radius (m) |
---|
87 | REAL, SAVE :: R_s ! mean snow crystal radius (m) |
---|
88 | !$OMP THREADPRIVATE(alpha_r, alpha_s, R_r, R_s) |
---|
89 | REAL :: pr, ps, ice, water |
---|
90 | ! REAL :: conserv |
---|
91 | |
---|
92 | IF (debut) THEN |
---|
93 | |
---|
94 | alpha_r = 0.001 ! coefficient d'impaction pour la pluie |
---|
95 | alpha_s = 0.01 ! coefficient d'impaction pour la neige |
---|
96 | R_r = 0.001 ! mean raindrop radius (m) |
---|
97 | R_s = 0.001 ! mean snow crystal radius (m) |
---|
98 | frac_fine_scav = 0.7 |
---|
99 | frac_coar_scav = 0.7 |
---|
100 | ! Droplet size shrinks by evap |
---|
101 | frac_aer = 0.5 |
---|
102 | debut = .FALSE. |
---|
103 | |
---|
104 | OPEN(99, file = 'lsc_scav_param.data', status = 'old', & |
---|
105 | form = 'formatted', err = 9999) |
---|
106 | READ(99, *, end = 9998) alpha_r |
---|
107 | READ(99, *, end = 9998) alpha_s |
---|
108 | READ(99, *, end = 9998) R_r |
---|
109 | READ(99, *, end = 9998) R_s |
---|
110 | READ(99, *, end = 9998) frac_fine_scav |
---|
111 | READ(99, *, end = 9998) frac_coar_scav |
---|
112 | READ(99, *, end = 9998) frac_aer |
---|
113 | 9998 CONTINUE |
---|
114 | CLOSE(99) |
---|
115 | 9999 CONTINUE |
---|
116 | |
---|
117 | PRINT*, 'alpha_r', alpha_r |
---|
118 | PRINT*, 'alpha_s', alpha_s |
---|
119 | PRINT*, 'R_r', R_r |
---|
120 | PRINT*, 'R_s', R_s |
---|
121 | PRINT*, 'frac_fine_scav', frac_fine_scav |
---|
122 | PRINT*, 'frac_coar_scav', frac_coar_scav |
---|
123 | PRINT*, 'frac_aer ev', frac_aer |
---|
124 | |
---|
125 | ENDIF !(debut) |
---|
126 | !!!!!!!!!!!!!!!!!!!!!!!!!!! |
---|
127 | |
---|
128 | ! initialization |
---|
129 | dxin = 0. |
---|
130 | dxev = 0. |
---|
131 | beta_ev = 0. |
---|
132 | |
---|
133 | DO i = 1, klon |
---|
134 | his_dh(i) = 0. |
---|
135 | ENDDO |
---|
136 | |
---|
137 | DO k = 1, klev |
---|
138 | DO i = 1, klon |
---|
139 | dxbc(i, k) = 0. |
---|
140 | beta_v1(i, k) = 0. |
---|
141 | deltaP(i, k) = 0. |
---|
142 | ENDDO |
---|
143 | ENDDO |
---|
144 | |
---|
145 | ! pressure and size of the layer |
---|
146 | DO k = klev, 1, -1 |
---|
147 | DO i = 1, klon |
---|
148 | zrho(i, k) = pplay(i, k) / t(i, k) / RD |
---|
149 | zdz(i, k) = (paprs(i, k) - paprs(i, k + 1)) / zrho(i, k) / RG |
---|
150 | zmass(i, k) = (paprs(i, k) - paprs(i, k + 1)) / RG |
---|
151 | ENDDO |
---|
152 | ENDDO |
---|
153 | |
---|
154 | !jyg< |
---|
155 | !! Temporary correction: all non-aerosol tracers are dealt with in the same way. |
---|
156 | !! Should be updated once it has been decided how gases should be dealt with. |
---|
157 | IF (aerosol(it)) THEN |
---|
158 | frac_ev = frac_aer |
---|
159 | ELSE ! gas |
---|
160 | frac_ev = frac_gas |
---|
161 | ENDIF |
---|
162 | |
---|
163 | !jyg< |
---|
164 | IF (aerosol(it)) THEN ! aerosol |
---|
165 | DO k = 1, klev |
---|
166 | DO i = 1, klon |
---|
167 | scav(i, k) = frac_fine_scav |
---|
168 | ENDDO |
---|
169 | ENDDO |
---|
170 | ELSE ! gas |
---|
171 | DO k = 1, klev |
---|
172 | DO i = 1, klon |
---|
173 | henry_t = henry * exp(-kk * (1. / 298. - 1. / t(i, k))) ! mol/l/atm |
---|
174 | f_a = henry_t / 101.325 * R * t(i, k) * oliq * zrho(i, k) / rho_water |
---|
175 | scav(i, k) = f_a / (1. + f_a) |
---|
176 | ENDDO |
---|
177 | ENDDO |
---|
178 | ENDIF |
---|
179 | |
---|
180 | DO k = klev - 1, 1, -1 |
---|
181 | DO i = 1, klon |
---|
182 | ! incloud scavenging |
---|
183 | IF (iflag_lscav == 4) THEN |
---|
184 | beta = beta_fisrt(i, k) * rneb(i, k) |
---|
185 | ELSE |
---|
186 | beta = flxr(i, k) - flxr(i, k + 1) + flxs(i, k) - flxs(i, k + 1) |
---|
187 | beta = beta / zmass(i, k) / oliq |
---|
188 | beta = MAX(0., beta) |
---|
189 | ENDIF ! (iflag_lscav .EQ. 4) |
---|
190 | beta_v1(i, k) = beta !! for output |
---|
191 | |
---|
192 | dxin = tr_seri(i, k, it) * (exp(-scav(i, k) * beta * pdtime) - 1.) |
---|
193 | his_dh(i) = his_dh(i) - dxin * zmass(i, k) / pdtime ! kg/m2/s |
---|
194 | d_tr_insc(i, k, it) = dxin ! kg/kg/timestep |
---|
195 | |
---|
196 | ! below-cloud impaction |
---|
197 | !jyg< |
---|
198 | IF (.NOT.aerosol(it)) THEN |
---|
199 | d_tr_bcscav(i, k, it) = 0. |
---|
200 | ELSE |
---|
201 | pr = 0.5 * (flxr(i, k) + flxr(i, k + 1)) |
---|
202 | ps = 0.5 * (flxs(i, k) + flxs(i, k + 1)) |
---|
203 | water = pr * alpha_r / R_r / rho_water |
---|
204 | ice = ps * alpha_s / R_s / rho_ice |
---|
205 | dxbc(i, k) = -3. / 4. * tr_seri(i, k, it) * pdtime * (water + ice) |
---|
206 | ! add tracers from below cloud scav in his_dh |
---|
207 | his_dh(i) = his_dh(i) - dxbc(i, k) * zmass(i, k) / pdtime ! kg/m2/s |
---|
208 | d_tr_bcscav(i, k, it) = dxbc(i, k) ! kg/kg/timestep |
---|
209 | ENDIF |
---|
210 | |
---|
211 | ! reevaporation |
---|
212 | deltaP(i, k) = flxr(i, k + 1) + flxs(i, k + 1) - flxr(i, k) - flxs(i, k) |
---|
213 | deltaP(i, k) = max(deltaP(i, k), 0.) |
---|
214 | |
---|
215 | IF (flxr(i, k + 1) + flxs(i, k + 1)>1.e-16) THEn |
---|
216 | beta_ev(i, k) = deltaP(i, k) / (flxr(i, k + 1) + flxs(i, k + 1)) |
---|
217 | ELSE |
---|
218 | beta_ev(i, k) = 0. |
---|
219 | ENDIF |
---|
220 | |
---|
221 | beta_ev(i, k) = max(min(1., beta_ev(i, k)), 0.) |
---|
222 | |
---|
223 | !jyg |
---|
224 | IF (ABS(1. - (1. - frac_ev) * beta_ev(i, k))>1.e-16) THEN |
---|
225 | ! remove tracers from precipitation owing to release by evaporation in his_dh |
---|
226 | dxev = frac_ev * beta_ev(i, k) * his_dh(i) * pdtime / zmass(i, k) / (1. - (1. - frac_ev) * beta_ev(i, k)) |
---|
227 | his_dh(i) = his_dh(i) * (1. - frac_ev * beta_ev(i, k) / (1. - (1. - frac_ev) * beta_ev(i, k))) |
---|
228 | ELSE |
---|
229 | dxev = his_dh(i) * pdtime / zmass(i, k) |
---|
230 | his_dh(i) = 0. |
---|
231 | ENDIF |
---|
232 | |
---|
233 | ! PRINT*, k, 'beta_ev',beta_ev |
---|
234 | ! remove tracers from precipitation owing to release by evaporation in his_dh |
---|
235 | ! dxev=frac_ev*deltaP(i,k)*pdtime * his_dh(i) /(zrho(i,k)*zdz(i,k)) |
---|
236 | !rplmd |
---|
237 | ! dxev=frac_ev*deltaP(i,k)*his_dh(i) *pdtime/(zrho(i,k)*zdz(i,k))/max(flxr(i,k)+flxs(i,k),1.e-16) |
---|
238 | |
---|
239 | d_tr_evap(i, k, it) = dxev ! kg/kg/timestep |
---|
240 | |
---|
241 | ENDDO |
---|
242 | ENDDO |
---|
243 | |
---|
244 | DO i = 1, klon |
---|
245 | qPrls(i, it) = his_dh(i) / max(flxr(i, 1) + flxs(i, 1), 1.e-16) |
---|
246 | ENDDO |
---|
247 | |
---|
248 | ! test de conservation |
---|
249 | ! conserv=0. |
---|
250 | ! DO k= klev,1,-1 |
---|
251 | ! DO i=1, klon |
---|
252 | ! conserv=conserv+d_tr_insc(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG & |
---|
253 | ! +d_tr_bcscav(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG & |
---|
254 | ! +d_tr_evap(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG |
---|
255 | ! IF(it.EQ.3) WRITE(*,'(I2,2X,a,e20.12,2X,a,e20.12,2X,a,e20.12,2X,a,e20.12)'),& |
---|
256 | ! k,'lsc conserv ',conserv,'insc',d_tr_insc(i,k,it),'bc',d_tr_bcscav(i,k,it),'ev',d_tr_evap(i,k,it) |
---|
257 | ! ENDDO |
---|
258 | ! ENDDO |
---|
259 | |
---|
260 | END SUBROUTINE lsc_scav |
---|