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wetdepo.f90 @ d6a0977

10.4.1_peseiGFS_025bugfixes+enhancementsdevrelease-10release-10.4.1scaling-bugunivie

Last change on this file since d6a0977 was d6a0977, checked in by Espen Sollum ATMOS <eso@…>, 8 years ago
Updates to Henrik's wet depo scheme
Property mode set to `100644`
File size: 18.0 KB

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1	!**********************************************************************
2	! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 *
3	! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, *
4	! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann *
5	! *
6	! This file is part of FLEXPART. *
7	! *
8	! FLEXPART is free software: you can redistribute it and/or modify *
9	! it under the terms of the GNU General Public License as published by*
10	! the Free Software Foundation, either version 3 of the License, or *
11	! (at your option) any later version. *
12	! *
13	! FLEXPART is distributed in the hope that it will be useful, *
14	! but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	! GNU General Public License for more details. *
17	! *
18	! You should have received a copy of the GNU General Public License *
19	! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. *
20	!**********************************************************************
21
22	subroutine wetdepo(itime,ltsample,loutnext)
23	! i i i
24	!*****************************************************************************
25	! *
26	! Calculation of wet deposition using the concept of scavenging coefficients.*
27	! For lack of detailed information, washout and rainout are jointly treated. *
28	! It is assumed that precipitation does not occur uniformly within the whole *
29	! grid cell, but that only a fraction of the grid cell experiences rainfall. *
30	! This fraction is parameterized from total cloud cover and rates of large *
31	! scale and convective precipitation. *
32	! *
33	! Author: A. Stohl *
34	! *
35	! 1 December 1996 *
36	! *
37	! Correction by Petra Seibert, Sept 2002: *
38	! use centred precipitation data for integration *
39	! Code may not be correct for decay of deposition! *
40	! *
41	!*****************************************************************************
42	! *
43	! Variables: *
44	! cc [0-1] total cloud cover *
45	! convp [mm/h] convective precipitation rate *
46	! grfraction [0-1] fraction of grid, for which precipitation occurs *
47	! ix,jy indices of output grid cell for each particle *
48	! itime [s] actual simulation time [s] *
49	! jpart particle index *
50	! ldeltat [s] interval since radioactive decay was computed *
51	! lfr, cfr area fraction covered by precipitation for large scale *
52	! and convective precipitation (dependent on prec. rate) *
53	! loutnext [s] time for which gridded deposition is next output *
54	! loutstep [s] interval at which gridded deposition is output *
55	! lsp [mm/h] large scale precipitation rate *
56	! ltsample [s] interval over which mass is deposited *
57	! prec [mm/h] precipitation rate in subgrid, where precipitation occurs*
58	! wetdeposit mass that is wet deposited *
59	! wetgrid accumulated deposited mass on output grid *
60	! wetscav scavenging coefficient *
61	! *
62	! Constants: *
63	! *
64	!*****************************************************************************
65
66	use point_mod
67	use par_mod
68	use com_mod
69
70	implicit none
71
72	integer :: jpart,itime,ltsample,loutnext,ldeltat,i,j,ix,jy
73	integer :: ngrid,itage,nage,hz,il,interp_time, n, clouds_v
74	integer :: ks, kp
75	integer :: n1,n2, icbot,ictop, indcloud !TEST
76	real :: S_i, act_temp, cl, cle ! in cloud scavenging
77	real :: clouds_h ! cloud height for the specific grid point
78	real :: xtn,ytn,lsp,convp,cc,grfraction(3),prec(3),wetscav,totprec
79	real :: wetdeposit(maxspec),restmass
80	real,parameter :: smallnum = tiny(0.0) ! smallest number that can be handled
81	!save lfr,cfr
82
83	real, parameter :: lfr(5) = (/ 0.5,0.65,0.8,0.9,0.95/)
84	real, parameter :: cfr(5) = (/ 0.4,0.55,0.7,0.8,0.9 /)
85
86	!ZHG aerosol below-cloud scavenging removal polynomial constants for rain and snow
87	real, parameter :: bclr(6) = (/274.35758, 332839.59273, 226656.57259, 58005.91340, 6588.38582, 0.244984/) !rain (Laakso et al 2003)
88	real, parameter :: bcls(6) = (/22.7, 0.0, 0.0, 1321.0, 381.0, 0.0/) !now (Kyro et al 2009)
89	real :: frac_act, liq_frac, dquer_m
90
91	integer :: blc_count, inc_count
92	real :: Si_dummy, wetscav_dummy
93
94
95
96	! Compute interval since radioactive decay of deposited mass was computed
97	!************************************************************************
98
99	if (itime.le.loutnext) then
100	ldeltat=itime-(loutnext-loutstep)
101	else ! first half of next interval
102	ldeltat=itime-loutnext
103	endif
104
105	! Loop over all particles
106	!************************
107
108
109	blc_count=0
110	inc_count=0
111
112	do jpart=1,numpart
113
114	if (itra1(jpart).eq.-999999999) goto 20
115	if(ldirect.eq.1)then
116	if (itra1(jpart).gt.itime) goto 20
117	else
118	if (itra1(jpart).lt.itime) goto 20
119	endif
120
121	! Determine age class of the particle
122	itage=abs(itra1(jpart)-itramem(jpart))
123	do nage=1,nageclass
124	if (itage.lt.lage(nage)) goto 33
125	end do
126	33 continue
127
128
129	! Determine which nesting level to be used
130	!*****************************************
131
132	ngrid=0
133	do j=numbnests,1,-1
134	if ((xtra1(jpart).gt.xln(j)).and.(xtra1(jpart).lt.xrn(j)).and. &
135	(ytra1(jpart).gt.yln(j)).and.(ytra1(jpart).lt.yrn(j))) then
136	ngrid=j
137	goto 23
138	endif
139	end do
140	23 continue
141
142
143	! Determine nested grid coordinates
144	!**********************************
145
146	if (ngrid.gt.0) then
147	xtn=(xtra1(jpart)-xln(ngrid))*xresoln(ngrid)
148	ytn=(ytra1(jpart)-yln(ngrid))*yresoln(ngrid)
149	ix=int(xtn)
150	jy=int(ytn)
151	else
152	ix=int(xtra1(jpart))
153	jy=int(ytra1(jpart))
154	endif
155
156
157	! Interpolate large scale precipitation, convective precipitation and
158	! total cloud cover
159	! Note that interpolated time refers to itime-0.5*ltsample [PS]
160	!********************************************************************
161	interp_time=nint(itime-0.5*ltsample)
162
163	if (ngrid.eq.0) then
164	call interpol_rain(lsprec,convprec,tcc,nxmax,nymax, &
165	1,nx,ny,memind,real(xtra1(jpart)),real(ytra1(jpart)),1, &
166	memtime(1),memtime(2),interp_time,lsp,convp,cc)
167	else
168	call interpol_rain_nests(lsprecn,convprecn,tccn, &
169	nxmaxn,nymaxn,1,maxnests,ngrid,nxn,nyn,memind,xtn,ytn,1, &
170	memtime(1),memtime(2),interp_time,lsp,convp,cc)
171	endif
172
173	! If total precipitation is less than 0.01 mm/h - no scavenging occurs
174	if ((lsp.lt.0.01).and.(convp.lt.0.01)) goto 20
175
176	! get the level were the actual particle is in
177	do il=2,nz
178	if (height(il).gt.ztra1(jpart)) then
179	hz=il-1
180	goto 26
181	endif
182	end do
183	26 continue
184
185	n=memind(2)
186	if (abs(memtime(1)-interp_time).lt.abs(memtime(2)-interp_time)) &
187	n=memind(1)
188
189	if (ngrid.eq.0) then
190	clouds_v=clouds(ix,jy,hz,n)
191	clouds_h=cloudsh(ix,jy,n)
192	else
193	! new removal not implemented for nests yet
194	clouds_v=cloudsn(ix,jy,hz,n,ngrid)
195	clouds_h=cloudsnh(ix,jy,n,ngrid)
196	endif
197
198	! if there is no precipitation or the particle is above the clouds no
199	! scavenging is done
200
201	if (clouds_v.le.1) goto 20
202
203	! 1) Parameterization of the the area fraction of the grid cell where the
204	! precipitation occurs: the absolute limit is the total cloud cover, but
205	! for low precipitation rates, an even smaller fraction of the grid cell
206	! is used. Large scale precipitation occurs over larger areas than
207	! convective precipitation.
208	!**************************************************************************
209
210	if (lsp.gt.20.) then
211	i=5
212	else if (lsp.gt.8.) then
213	i=4
214	else if (lsp.gt.3.) then
215	i=3
216	else if (lsp.gt.1.) then
217	i=2
218	else
219	i=1
220	endif
221
222	if (convp.gt.20.) then
223	j=5
224	else if (convp.gt.8.) then
225	j=4
226	else if (convp.gt.3.) then
227	j=3
228	else if (convp.gt.1.) then
229	j=2
230	else
231	j=1
232	endif
233
234
235	!ZHG oct 2014 : Calculated for 1) both 2) lsp 3) convp
236	! Tentatively differentiate the grfraction for lsp and convp for treating differently the two forms
237	! for now they are treated the same
238	grfraction(1)=max(0.05,cc(lsplfr(i)+convp*cfr(j))/(lsp+convp))
239	grfraction(2)=max(0.05,cc*(lfr(i)))
240	grfraction(3)=max(0.05,cc*(cfr(j)))
241
242
243	! 2) Computation of precipitation rate in sub-grid cell
244	!******************************************************
245	prec(1)=(lsp+convp)/grfraction(1)
246	prec(2)=(lsp)/grfraction(2)
247	prec(3)=(convp)/grfraction(3)
248
249
250	! 3) Computation of scavenging coefficients for all species
251	! Computation of wet deposition
252	!**********************************************************
253
254	do ks=1,nspec ! loop over species
255	wetdeposit(ks)=0.
256	wetscav=0.
257
258	!ZHG test if it nested?
259	if (ngrid.gt.0) then
260	act_temp=ttn(ix,jy,hz,n,ngrid)
261	else
262	act_temp=tt(ix,jy,hz,n)
263	endif
264
265
266	!***********************
267	! BELOW CLOUD SCAVENGING
268	!***********************
269	if (clouds_v.ge.4) then !below cloud
270
271	if (weta(ks).gt.0. .or. wetb(ks).gt.0.) then !if positive below-cloud parameters given in SPECIES file (either A or B)
272	blc_count=blc_count+1
273
274	!GAS
275	if (dquer(ks) .le. 0.) then !is gas
276	wetscav=weta(ks)prec(1)*wetb(ks)
277
278	!AEROSOL
279	else !is particle
280	!NIK 17.02.2015
281	! For the calculation here particle size needs to be in meter and not um as dquer is changed to in readreleases
282	! for particles larger than 10 um use the largest size defined in the parameterizations (10um)
283	dquer_m=min(10.,dquer(ks))/1000000. !conversion from um to m
284	if (act_temp .ge. 273 .and. weta(ks).gt.0.) then !Rain
285	! ZHG 2014 : Particle RAIN scavenging coefficient based on Laakso et al 2003,
286	! the below-cloud scavenging (rain efficienty)
287	! parameter A (=weta) from SPECIES file
288	wetscav= weta(ks)10(bclr(1)+ (bclr(2)(log10(dquer_m))*(-4))+(bclr(3)(log10(dquer_m))*(-3))+ (bclr(4) &
289	(log10(dquer_m))*(-2))+ (bclr(5)(log10(dquer_m))*(-1))+ bclr(6) (prec(1))**(0.5))
290
291	elseif (act_temp .lt. 273 .and. wetb(ks).gt.0.) then ! Snow
292	! ZHG 2014 : Particle SNOW scavenging coefficient based on Kyro et al 2009,
293	! the below-cloud scavenging (Snow efficiency)
294	! parameter B (=wetb) from SPECIES file
295	wetscav= wetb(ks)10(bcls(1)+ (bcls(2)(log10(dquer_m))*(-4))+(bcls(3)(log10(dquer_m))*(-3))+ (bcls(4) &
296	(log10(dquer_m))*(-2))+ (bcls(5)(log10(dquer_m))*(-1))+ bcls(6) (prec(1))**(0.5))
297
298	endif
299
300	! write(,) 'bl-cloud, act_temp=',act_temp, ',prec=',prec(1),',wetscav=', wetscav, ', jpart=',jpart
301
302	endif !gas or particle
303	endif ! positive below-cloud scavenging parameters given in Species file
304	endif !end BELOW
305
306
307	!********************
308	! IN CLOUD SCAVENGING
309	!******************************************************
310	if (clouds_v.lt.4) then ! In-cloud
311	! NIK 13 may 2015: only do incloud if positive in-cloud scavenging parameters are given in species file
312	if (weta_in(ks).gt.0. .or. wetb_in(ks).gt.0.) then
313	! if negative coefficients (turned off) set to zero for use in equation
314	if (weta_in(ks).lt.0.) weta_in(ks)=0.
315	if (wetb_in(ks).lt.0.) wetb_in(ks)=0.
316
317	!ZHG 2015 Cloud liquid & ice water (CLWC+CIWC) from ECMWF
318	if (readclouds) then !icloud_stats(ix,jy,4,n) has units kg/m2
319	cl =icloud_stats(ix,jy,4,n)*(grfraction(1)/cc)
320	else !parameterize cloudwater m2/m3
321	!ZHG updated parameterization of cloud water to better reproduce the values coming from ECMWF
322	cl=1.6E-6prec(1)*0.36
323	endif
324
325	!ZHG: Calculate the partition between liquid and water phase water.
326	if (act_temp .le. 253) then
327	liq_frac=0
328	else if (act_temp .ge. 273) then
329	liq_frac=1
330	else
331	liq_frac =((act_temp-273)/(273-253))**2
332	endif
333	! ZHG: Calculate the aerosol partition based on cloud phase and Ai and Bi
334	frac_act = liq_fracweta_in(ks) +(1-liq_frac)wetb_in(ks)
335
336	!ZHG Use the activated fraction and the liqid water to calculate the washout
337
338	! AEROSOL
339	!**************************************************
340	if (dquer(ks).gt. 0.) then ! is particle
341
342	S_i= frac_act/cl
343
344	!*********************
345	! GAS
346	else ! is gas
347
348	cle=(1-cl)/(henry(ks)(r_air/3500.)act_temp)+cl
349	!REPLACE to switch old/ new scheme
350	! S_i=frac_act/cle
351	S_i=1/cle
352	endif ! gas or particle
353
354	! scavenging coefficient based on Hertel et al 1995 - using the S_i for either gas or aerosol
355	!OLD
356	if (readclouds) then
357	wetscav=S_i*(prec(1)/3.6E6)
358	else
359	wetscav=S_i*(prec(1)/3.6E6)/clouds_h
360	endif
361
362	!ZHG 2015 TEST
363	! Si_dummy=frac_act/2E-7prec(1)*0.36
364	! wetscav_dummy=Si_dummy*(prec(1)/3.6E6)/clouds_h
365	! if (clouds_v.lt.4) then
366	! talltest=talltest+1
367	!if(talltest .eq. 1) OPEN(UNIT=199, FILE=utfil,FORM='FORMATTED',STATUS = 'UNKNOWN')
368	!if(talltest .lt. 100001) write(199,) prec(1)/3.6E6, cl, clouds_h2E-7prec(1)*0.36,clouds_v,ytra1(jpart)-90
369	!if(talltest .lt. 100001) write(199,*) wetscav, wetscav_dummy,prec(1),ytra1(jpart)-90,clouds_v,cl
370	!if(talltest .eq. 100001) CLOSE(199)
371	!if(talltest .eq. 100001) STOP
372	!
373	!write(,) 'PREC kg/m2s CLOUD kg/m2', (prec(1)/3.6E6), cl !, '2E-7prec(1)0.36', 2E-7prec(1)*0.36,'2E-7prec(1)*0.36clouds_h',2E-7prec(1)0.36clouds_h
374	!write(,) 'PREC kg/m2s LSP+convp kg/m2', prec(1), convp+lsp
375	!write(,) wetscav, wetscav_dummy
376	!write(,) cc, grfraction(1), cc/grfraction(1)
377
378	!write(,) 'Lmbda_old', (prec(1)/3.6E6)/(clouds_h2E-7prec(1)**0.36)
379
380
381	!write(,) '**************************************************'
382	!write(,) 'clouds_h', clouds_h, 'clouds_v',clouds_v,'abs(ltsample)', abs(ltsample)
383	!write(,) 'readclouds', readclouds, 'wetscav',wetscav, 'wetscav_dummy', wetscav_dummy
384	!write(,) 'S_i', S_i , 'Si_dummy', Si_dummy, 'prec(1)', prec(1)
385
386
387	! write(,) 'PRECIPITATION ,cl ECMWF , cl PARAMETIZED, clouds_v, lat' &
388	! ,prec(1)/3.6E6, cl, clouds_h2E-7prec(1)**0.36,clouds_v,ytra1(jpart)-90
389
390	!endif
391
392	endif ! positive in-cloud scavenging parameters given in Species file
393	endif !incloud
394	!END ZHG TEST
395
396	!**************************************************
397	! CALCULATE DEPOSITION
398	!**************************************************
399	! if (wetscav.le.0) write (,) 'neg, or 0 wetscav!'
400	! + ,wetscav,cle,cl,act_temp,prec,clouds_h,clouds_v
401
402	if (wetscav.gt.0.) then
403	wetdeposit(ks)=xmass1(jpart,ks)* &
404	(1.-exp(-wetscavabs(ltsample)))grfraction(1) ! wet deposition
405	!write(,) 'MASS DEPOSITED: PREC, WETSCAV, WETSCAVP', prec(1), wetdeposit(ks), xmass1(jpart,ks)* &
406	! (1.-exp(-wetscav_dummyabs(ltsample)))grfraction(1), clouds_v
407
408
409	else ! if no scavenging
410	wetdeposit(ks)=0.
411	endif
412
413	restmass = xmass1(jpart,ks)-wetdeposit(ks)
414	if (ioutputforeachrelease.eq.1) then
415	kp=npoint(jpart)
416	else
417	kp=1
418	endif
419	if (restmass .gt. smallnum) then
420	xmass1(jpart,ks)=restmass
421	! depostatistic
422	! wetdepo_sum(ks,kp)=wetdepo_sum(ks,kp)+wetdeposit(ks)
423	! depostatistic
424	else
425	xmass1(jpart,ks)=0.
426	endif
427	! Correct deposited mass to the last time step when radioactive decay of
428	! gridded deposited mass was calculated
429	if (decay(ks).gt.0.) then
430	wetdeposit(ks)=wetdeposit(ks)exp(abs(ldeltat)decay(ks))
431	endif
432
433
434	end do !all species
435
436	! Sabine Eckhardt, June 2008 create deposition runs only for forward runs
437	! Add the wet deposition to accumulated amount on output grid and nested output grid
438	!*****************************************************************************
439
440	if (ldirect.eq.1) then
441	call wetdepokernel(nclass(jpart),wetdeposit,real(xtra1(jpart)), &
442	real(ytra1(jpart)),nage,kp)
443	if (nested_output.eq.1) call wetdepokernel_nest(nclass(jpart), &
444	wetdeposit,real(xtra1(jpart)),real(ytra1(jpart)),nage,kp)
445	endif
446
447	20 continue
448	end do ! all particles
449
450	! count the total number of below-cloud and in-cloud occurences:
451	tot_blc_count=tot_blc_count+blc_count
452	tot_inc_count=tot_inc_count+inc_count
453
454	end subroutine wetdepo

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