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traccoag_mod.F90 @ 2709

Last change on this file since 2709 was 2704, checked in by oboucher, 8 years ago
This revision concerns the StratAer? module and should not impact the rest of LMDz Bug correction in interp_sulf_input.F90 Update of miecalc_aer.F90 and traccoag_mod.F90 Phytrac tracers are now dealt with in XIOS through the Fortran interface with minimal input in the xml Making tracer groups in DefLists? for StratAer?
File size: 13.3 KB

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1	MODULE traccoag_mod
2	!
3	! This module calculates the concentration of aerosol particles in certain size bins
4	! considering coagulation and sedimentation.
5	!
6	CONTAINS
7
8	SUBROUTINE traccoag(pdtphys, gmtime, debutphy, julien, &
9	presnivs, xlat, xlon, pphis, pphi, &
10	t_seri, pplay, paprs, sh, rh , &
11	tr_seri)
12
13	USE phys_local_var_mod, ONLY: mdw, sulf_convert, sulf_nucl, sulf_cond_evap, &
14	& sfluxaer, ocs_convert, R2SO4, DENSO4, f_r_wet, SO2_backgr_tend, OCS_backgr_tend, &
15	& OCS_lifetime, SO2_lifetime, surf_PM25_sulf
16
17	USE dimphy
18	USE infotrac
19	USE aerophys
20	USE geometry_mod, ONLY : cell_area
21	USE mod_grid_phy_lmdz
22	USE mod_phys_lmdz_mpi_data, ONLY : is_mpi_root
23	USE mod_phys_lmdz_para, only: gather, scatter
24	USE phys_cal_mod
25	USE sulfate_aer_mod
26	USE phys_local_var_mod, ONLY: stratomask
27	USE YOMCST
28
29	IMPLICIT NONE
30
31	! Input argument
32	!---------------
33	REAL,INTENT(IN) :: pdtphys ! Pas d'integration pour la physique (seconde)
34	REAL,INTENT(IN) :: gmtime ! Heure courante
35	LOGICAL,INTENT(IN) :: debutphy ! le flag de l'initialisation de la physique
36	INTEGER,INTENT(IN) :: julien ! Jour julien
37
38	REAL,DIMENSION(klev),INTENT(IN) :: presnivs! pressions approximat. des milieux couches (en PA)
39	REAL,DIMENSION(klon),INTENT(IN) :: xlat ! latitudes pour chaque point
40	REAL,DIMENSION(klon),INTENT(IN) :: xlon ! longitudes pour chaque point
41	REAL,DIMENSION(klon),INTENT(IN) :: pphis ! geopotentiel du sol
42	REAL,DIMENSION(klon,klev),INTENT(IN) :: pphi ! geopotentiel de chaque couche
43
44	REAL,DIMENSION(klon,klev),INTENT(IN) :: t_seri ! Temperature
45	REAL,DIMENSION(klon,klev),INTENT(IN) :: pplay ! pression pour le mileu de chaque couche (en Pa)
46	REAL,DIMENSION(klon,klev+1),INTENT(IN) :: paprs ! pression pour chaque inter-couche (en Pa)
47	REAL,DIMENSION(klon,klev),INTENT(IN) :: sh ! humidite specifique
48	REAL,DIMENSION(klon,klev),INTENT(IN) :: rh ! humidite relative
49
50	! Output argument
51	!----------------
52	REAL,DIMENSION(klon,klev,nbtr),INTENT(INOUT) :: tr_seri ! Concentration Traceur [U/KgA]
53
54	! Local variables
55	!----------------
56	! flag for sulfur emission scenario: (0) background aerosol ; (1) volcanic eruption ; (2) stratospheric aerosol injections (SAI)
57	INTEGER,PARAMETER :: flag_sulf_emit=2
58	!
59	!--flag_sulf_emit=1 --example Pinatubo
60	INTEGER,PARAMETER :: year_emit_vol=1991 ! year of emission date
61	INTEGER,PARAMETER :: mth_emit_vol=6 ! month of emission date
62	INTEGER,PARAMETER :: day_emit_vol=15 ! day of emission date
63	REAL,PARAMETER :: m_aer_emiss_vol=7.e9 ! emitted sulfur mass in kgS, e.g. 7Tg(S)=14Tg(SO2)
64	REAL,PARAMETER :: altemiss_vol=17.e3 ! emission altitude in m
65	REAL,PARAMETER :: sigma_alt_vol=1.e3 ! standard deviation of emission altitude in m
66	REAL,PARAMETER :: xlat_vol=15.14 ! latitude of volcano in degree
67	REAL,PARAMETER :: xlon_vol=120.35 ! longitude of volcano in degree
68
69	!--flag_sulf_emit=2 --SAI
70	REAL,PARAMETER :: m_aer_emiss_sai=1.e10 ! emitted sulfur mass in kgS, eg 1e9=1TgS, 1e10=10TgS
71	REAL,PARAMETER :: altemiss_sai=17.e3 ! emission altitude in m
72	REAL,PARAMETER :: sigma_alt_sai=1.e3 ! standard deviation of emission altitude in m
73	REAL,PARAMETER :: xlat_sai=0.0 ! latitude of SAI in degree
74	REAL,PARAMETER :: xlon_sai=120.35 ! longitude of SAI in degree
75
76	!--other local variables
77	INTEGER :: it, k, i, ilon, ilev, itime, i_int
78	LOGICAL,DIMENSION(klon,klev) :: is_strato ! true = above tropopause, false = below
79	REAL,DIMENSION(klon,klev) :: m_air_gridbox ! mass of air in every grid box [kg]
80	REAL,DIMENSION(klon_glo,klev,nbtr) :: tr_seri_glo ! Concentration Traceur [U/KgA]
81	REAL,DIMENSION(klev+1) :: altLMDz ! altitude of layer interfaces in m
82	REAL,DIMENSION(klev) :: f_lay_emiss ! fraction of emission for every vertical layer
83	REAL :: f_lay_sum ! sum of layer emission fractions
84	REAL :: alt ! altitude for integral calculation
85	INTEGER,PARAMETER :: n_int_alt=10 ! number of subintervals for integration over Gaussian emission profile
86	REAL,DIMENSION(nbtr_bin) :: r_bin ! particle radius in size bin [m]
87	REAL,DIMENSION(nbtr_bin) :: r_lower ! particle radius at lower bin boundary [m]
88	REAL,DIMENSION(nbtr_bin) :: r_upper ! particle radius at upper bin boundary [m]
89	REAL,DIMENSION(nbtr_bin) :: m_part_dry ! mass of one dry particle in size bin [kg]
90	REAL :: zrho ! Density of air [kg/m3]
91	REAL :: zdz ! thickness of atm. model layer in m
92	REAL,DIMENSION(klon,klev) :: dens_aer ! density of aerosol particles [kg/m3 aerosol] with default H2SO4 mass fraction
93	REAL :: dlat, dlon ! d latitude and d longitude of grid in degree
94
95	IF (is_mpi_root) THEN
96	PRINT *,'in traccoag: date from phys_cal_mod =',year_cur,'-',mth_cur,'-',day_cur,'-',hour
97	ENDIF
98
99	dlat=180./2./FLOAT(nbp_lat) ! d latitude in degree
100	dlon=360./2./FLOAT(nbp_lon) ! d longitude in degree
101
102	DO it=1, nbtr_bin
103	r_bin(it)=mdw(it)/2.
104	ENDDO
105
106	!--set boundaries of size bins
107	DO it=1, nbtr_bin
108	IF (it.EQ.1) THEN
109	r_upper(it)=sqrt(r_bin(it+1)*r_bin(it))
110	r_lower(it)=r_bin(it)**2./r_upper(it)
111	ELSEIF (it.EQ.nbtr_bin) THEN
112	r_lower(it)=sqrt(r_bin(it)*r_bin(it-1))
113	r_upper(it)=r_bin(it)**2./r_lower(it)
114	ELSE
115	r_lower(it)=sqrt(r_bin(it)*r_bin(it-1))
116	r_upper(it)=sqrt(r_bin(it+1)*r_bin(it))
117	ENDIF
118	ENDDO
119
120	IF (debutphy .and. is_mpi_root) THEN
121	DO it=1, nbtr_bin
122	PRINT *,'radius bin', it, ':', r_bin(it), '(from', r_lower(it), 'to', r_upper(it), ')'
123	ENDDO
124	ENDIF
125
126	!--initialising logical is_strato from stratomask
127	is_strato(:,:)=.FALSE.
128	WHERE (stratomask.GT.0.5) is_strato=.TRUE.
129
130	! STRACOMP (H2O, P, t_seri -> aerosol composition (R2SO4))
131	! H2SO4 mass fraction in aerosol (%)
132	CALL stracomp(sh,t_seri,pplay)
133
134	! aerosol density (gr/cm3)
135	CALL denh2sa(t_seri)
136
137	! compute factor for converting dry to wet radius (for every grid box)
138	f_r_wet(:,:) = (dens_aer_dry/(DENSO4(:,:)1000.)/(R2SO4(:,:)/100.))*(1./3.)
139
140	!--calculate mass of air in every grid box
141	DO ilon=1, klon
142	DO ilev=1, klev
143	m_air_gridbox(ilon,ilev)=(paprs(ilon,ilev)-paprs(ilon,ilev+1)) / RG * cell_area(ilon)
144	ENDDO
145	ENDDO
146
147	IF (debutphy) THEN
148	CALL gather(tr_seri, tr_seri_glo)
149	IF (MAXVAL(tr_seri_glo).LT.1.e-30) THEN
150	!--initialising tracer concentrations to zero
151	DO it=1, nbtr
152	tr_seri(:,:,it)=0.0
153	ENDDO
154	ENDIF
155	ENDIF
156
157	!--sulfur emission, depending on chosen scenario (flag_sulf_emit)
158	SELECT CASE(flag_sulf_emit)
159
160	CASE(0) ! background aerosol
161	! do nothing (no emission)
162
163	CASE(1) ! volcanic eruption
164	!--only emit on day of eruption
165	! stretch emission over one day of Pinatubo eruption
166	IF (year_cur==year_emit_vol.AND.mth_cur==mth_emit_vol.AND.day_cur==day_emit_vol) THEN
167	!
168	DO i=1,klon
169	!Pinatubo eruption at 15.14N, 120.35E
170	IF ( xlat(i).GE.xlat_vol-dlat .AND. xlat(i).LT.xlat_vol+dlat .AND. &
171	xlon(i).GE.xlon_vol-dlon .AND. xlon(i).LT.xlon_vol+dlon ) THEN
172	! compute altLMDz
173	altLMDz(:)=0.0
174	DO k=1, klev
175	zrho=pplay(i,k)/t_seri(i,k)/RD !air density in kg/m3
176	zdz=(paprs(i,k)-paprs(i,k+1))/zrho/RG !thickness of layer in m
177	altLMDz(k+1)=altLMDz(k)+zdz
178	ENDDO
179	!compute distribution of emission to vertical model layers (based on Gaussian peak in altitude)
180	f_lay_sum=0.0
181	DO k=1, klev
182	f_lay_emiss(k)=0.0
183	DO i_int=1, n_int_alt
184	alt=altLMDz(k)+float(i_int)*(altLMDz(k+1)-altLMDz(k))/float(n_int_alt)
185	f_lay_emiss(k)=f_lay_emiss(k)+1./(sqrt(2.RPI)sigma_alt_vol)* &
186	& exp(-0.5((alt-altemiss_vol)/sigma_alt_vol)2.) &
187	& (altLMDz(k+1)-altLMDz(k))/float(n_int_alt)
188	ENDDO
189	f_lay_sum=f_lay_sum+f_lay_emiss(k)
190	ENDDO
191	!correct for step integration error
192	f_lay_emiss(:)=f_lay_emiss(:)/f_lay_sum
193	!emission as SO2 gas (with m(SO2)=64/32*m_aer_emiss)
194	!vertically distributed emission
195	DO k=1, klev
196	tr_seri(i,k,id_SO2_strat)=tr_seri(i,k,id_SO2_strat)+ &
197	& m_aer_emiss_vol(mSO2mol/mSatom)/m_air_gridbox(i,k)f_lay_emiss(k) &
198	& /(1.*86400./pdtphys) ! stretch emission over one day of Pinatubo eruption
199	ENDDO
200	ENDIF ! emission grid cell
201	ENDDO ! klon loop
202	ENDIF ! emission period
203
204	CASE(2) ! stratospheric aerosol injections (SAI)
205	!
206	DO i=1,klon
207	! SAI standard scenario with continuous emission from 1 grid point at the equator
208	! SAI emission on single month
209	! IF ((mth_cur==4 .AND. &
210	! SAI continuous emission o
211	IF ( xlat(i).GE.xlat_sai-dlat .AND. xlat(i).LT.xlat_sai+dlat .AND. &
212	& xlon(i).GE.xlon_sai-dlon .AND. xlon(i).LT.xlon_sai+dlon ) THEN
213	! compute altLMDz
214	altLMDz(:)=0.0
215	DO k=1, klev
216	zrho=pplay(i,k)/t_seri(i,k)/RD !air density in kg/m3
217	zdz=(paprs(i,k)-paprs(i,k+1))/zrho/RG !thickness of layer in m
218	altLMDz(k+1)=altLMDz(k)+zdz
219	ENDDO
220	!compute distribution of emission to vertical model layers (based on Gaussian peak in altitude)
221	f_lay_sum=0.0
222	DO k=1, klev
223	f_lay_emiss(k)=0.0
224	DO i_int=1, n_int_alt
225	alt=altLMDz(k)+float(i_int)*(altLMDz(k+1)-altLMDz(k))/float(n_int_alt)
226	f_lay_emiss(k)=f_lay_emiss(k)+1./(sqrt(2.RPI)sigma_alt_sai)* &
227	& exp(-0.5((alt-altemiss_sai)/sigma_alt_sai)2.) &
228	& (altLMDz(k+1)-altLMDz(k))/float(n_int_alt)
229	ENDDO
230	f_lay_sum=f_lay_sum+f_lay_emiss(k)
231	ENDDO
232	!correct for step integration error
233	f_lay_emiss(:)=f_lay_emiss(:)/f_lay_sum
234	!emission as SO2 gas (with m(SO2)=64/32*m_aer_emiss)
235	!vertically distributed emission
236	DO k=1, klev
237	tr_seri(i,k,id_SO2_strat)=tr_seri(i,k,id_SO2_strat)+ &
238	& m_aer_emiss_sai(mSO2mol/mSatom)/m_air_gridbox(i,k)f_lay_emiss(k) &
239	& /(360.*86400./pdtphys) ! stretch emission over whole year (360d)
240	! & /(60.*86400./pdtphys) ! stretch emission over 2 months (seasonal emission)
241	! & /7. ! distribute equally over 7 emission grid points
242	ENDDO
243	! !emission as monodisperse particles with 0.1um dry radius (BIN21)
244	! !vertically distributed emission
245	! DO k=1, klev
246	! tr_seri(i,k,id_BIN01_strat+20)=tr_seri(i,k,id_BIN01_strat+20)+ &
247	! & m_aer_emiss(mH2SO4mol/mSatom)/m_part_dry(21)/m_air_gridbox(i,k)f_lay_emiss(k) &
248	! & /(360.*86400./pdtphys) & ! stretch emission over whole year (360d)
249	! & /7. ! distribute equally over 7 emission grid points
250	! ENDDO
251	ENDIF ! emission grid cell
252	ENDDO ! klon loop
253
254	END SELECT ! emission scenario (flag_sulf_emit)
255
256	!--read background concentrations of OCS and SO2 and lifetimes from input file
257	!--update the variables defined in phys_local_var_mod
258	CALL interp_sulf_input(debutphy,pdtphys,paprs,tr_seri)
259
260	!--convert OCS to SO2 in the stratosphere
261	CALL ocs_to_so2(pdtphys,tr_seri,t_seri,pplay,paprs,sh,is_strato)
262
263	!--convert SO2 to H2SO4
264	CALL so2_to_h2so4(pdtphys,tr_seri,t_seri,pplay,paprs,sh,is_strato)
265
266	!--common routine for nucleation and condensation/evaporation with adaptive timestep
267	CALL micphy_tstep(pdtphys,tr_seri,t_seri,pplay,paprs,rh,is_strato)
268
269	!--call coagulation routine
270	CALL coagulate(pdtphys,mdw,tr_seri,t_seri,pplay,dens_aer,is_strato)
271
272	!--call sedimentation routine
273	CALL aer_sedimnt(pdtphys, t_seri, pplay, paprs, tr_seri, dens_aer)
274
275	!--compute mass concentration of PM2.5 sulfate particles (wet diameter and mass) at the surface for health studies
276	surf_PM25_sulf(:)=0.0
277	DO i=1,klon
278	DO it=1, nbtr_bin
279	IF (mdw(it) .LT. 2.5e-6) THEN
280	!surf_PM25_sulf(i)=surf_PM25_sulf(i)+tr_seri(i,1,it+nbtr_sulgas)*m_part(i,1,it) &
281	!assume that particles consist of ammonium sulfate at the surface (132g/mol) and are dry at T = 20 deg. C and 50 perc. humidity
282	surf_PM25_sulf(i)=surf_PM25_sulf(i)+tr_seri(i,1,it+nbtr_sulgas) &
283	& 132./98.dens_aer_dry4./3.RPI(mdw(it)/2.)*3 &
284	& pplay(i,1)/t_seri(i,1)/RD1e9
285	ENDIF
286	ENDDO
287	ENDDO
288
289	! CALL minmaxsimple(tr_seri(:,:,id_SO2_strat),0.0,0.0,'fin SO2')
290	! DO it=1, nbtr_bin
291	! CALL minmaxsimple(tr_seri(:,:,nbtr_sulgas+it),0.0,0.0,'fin bin ')
292	! ENDDO
293
294	END SUBROUTINE traccoag
295
296	END MODULE traccoag_mod

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