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hydrol.F90 @ 3233

Last change on this file since 3233 was 3194, checked in by emillour, 2 years ago
Generic PCM-WRF: Small corrections to enable compilation with WRF4. NC
Property svn:executable set to ``*
File size: 14.7 KB

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1	subroutine hydrol(ngrid,nq,ptimestep,rnat,tsurf, &
2	qsurf,dqsurf,dqs_hyd,pcapcal, &
3	albedo,albedo_bareground, &
4	albedo_snow_SPECTV,albedo_co2_ice_SPECTV, &
5	mu0,pdtsurf,pdtsurf_hyd,hice, &
6	pctsrf_sic,sea_ice)
7
8	use ioipsl_getin_p_mod, only: getin_p
9	use mod_grid_phy_lmdz, only : klon_glo ! # of physics point on full grid
10	use mod_phys_lmdz_para, only : is_master, gather, scatter
11	use watercommon_h, only: T_h2O_ice_liq, RLFTT, rhowater, mx_eau_sol
12	USE surfdat_h
13	use comdiurn_h
14	USE geometry_mod, only: cell_area
15	USE tracer_h
16	! use slab_ice_h
17	USE ocean_slab_mod, ONLY: alb_ice_max
18	USE ocean_slab_mod, ONLY: alb_ice_min
19	USE ocean_slab_mod, ONLY: h_alb_ice
20	use callkeys_mod, only: albedosnow,alb_ocean,albedoco2ice,ok_slab_ocean,Tsaldiff,maxicethick,co2cond
21	use radinc_h, only : L_NSPECTV
22
23	implicit none
24
25	!==================================================================
26	!
27	! Purpose
28	! -------
29	! Calculate the surface hydrology and albedo changes.
30	!
31	! Authors
32	! -------
33	! Adapted from LMDTERRE by B. Charnay (2010). Further
34	! Modifications by R. Wordsworth (2010).
35	! Spectral albedo by M. Turbet (2015).
36	!
37	! Called by
38	! ---------
39	! physiq.F
40	!
41	! Calls
42	! -----
43	! none
44	!
45	! Notes
46	! -----
47	! rnat is terrain type: 0-ocean; 1-continent
48	!
49	!==================================================================
50
51	integer ngrid,nq
52
53	! Inputs
54	! ------
55	real snowlayer
56	parameter (snowlayer=33.0) ! 33 kg/m^2 of snow, equal to a layer of 3.3 cm
57	real oceantime
58	parameter (oceantime=10243600)
59
60	logical,save :: oceanbulkavg ! relax ocean temperatures to a GLOBAL mean value?
61	logical,save :: activerunoff ! enable simple runoff scheme?
62	logical,save :: oceanalbvary ! ocean albedo varies with the diurnal cycle?
63	!$OMP THREADPRIVATE(oceanbulkavg,activerunoff,oceanalbvary)
64
65	! Arguments
66	! ---------
67	real rnat(ngrid) ! I changed this to integer (RW)
68	real,dimension(:),allocatable,save :: runoff
69	real totalrunoff, tsea, oceanarea
70	save oceanarea
71	!$OMP THREADPRIVATE(runoff,oceanarea)
72
73	real ptimestep
74	real mu0(ngrid)
75	real qsurf(ngrid,nq), tsurf(ngrid)
76	real dqsurf(ngrid,nq), pdtsurf(ngrid)
77	real hice(ngrid)
78	real albedo(ngrid,L_NSPECTV)
79	real albedo_bareground(ngrid)
80	real albedo_snow_SPECTV(L_NSPECTV)
81	real albedo_co2_ice_SPECTV(L_NSPECTV)
82	real pctsrf_sic(ngrid), sea_ice(ngrid)
83
84	real oceanarea2
85
86	! Output
87	! ------
88	real dqs_hyd(ngrid,nq)
89	real pdtsurf_hyd(ngrid)
90
91	! Local
92	! -----
93	real a,b,E
94	integer ig,iq, nw
95	real fsnoi, subli, fauxo
96	real twater(ngrid)
97	real pcapcal(ngrid)
98	real hicebis(ngrid)
99	real zqsurf(ngrid,nq)
100	real ztsurf(ngrid)
101	real albedo_sic, alb_ice
102	real zfra
103
104	integer, save :: ivap, iliq, iice
105	!$OMP THREADPRIVATE(ivap,iliq,iice)
106
107	logical, save :: firstcall=.true.
108	!$OMP THREADPRIVATE(firstcall)
109
110	real :: runoffamount(ngrid)
111	!#ifdef CPP_PARA
112	real :: runoffamount_glo(klon_glo)
113	real :: zqsurf_iliq_glo(klon_glo)
114	real :: rnat_glo(klon_glo)
115	real :: oceanarea_glo
116	real :: cell_area_glo(klon_glo)
117	!#else
118	! real :: runoffamount_glo(ngrid)
119	! real :: zqsurf_iliq_glo(ngrid)
120	!#endif
121
122
123	if(firstcall)then
124
125	oceanbulkavg=.false.
126	oceanalbvary=.false.
127	write(,)"Activate runnoff into oceans?"
128	activerunoff=.false.
129	call getin_p("activerunoff",activerunoff)
130	write(,)" activerunoff = ",activerunoff
131
132
133
134	if (activerunoff) then
135	ALLOCATE(runoff(ngrid))
136	runoff(1:ngrid)=0
137	endif
138
139	ivap=igcm_h2o_vap
140	iliq=igcm_h2o_vap
141	iice=igcm_h2o_ice
142
143	write(,) "hydrol: ivap=",ivap
144	write(,) " iliq=",iliq
145	write(,) " iice=",iice
146
147	! Here's the deal: iice is used in place of igcm_h2o_ice both on the
148	! surface and in the atmosphere. ivap is used in
149	! place of igcm_h2o_vap ONLY in the atmosphere, while
150	! iliq is used in place of igcm_h2o_vap ONLY on the
151	! surface.
152	! Soon to be extended to the entire water cycle...
153
154	! LOCAL ocean surface area
155	oceanarea=0.
156	do ig=1,ngrid
157	if(nint(rnat(ig)).eq.0)then
158	oceanarea=oceanarea+cell_area(ig)
159	endif
160	enddo
161
162	if(oceanbulkavg.and.(oceanarea.le.0.))then
163	print*,'How are we supposed to average the ocean'
164	print*,'temperature, when there are no oceans?'
165	call abort
166	endif
167
168	if(activerunoff.and.(oceanarea.le.0.))then
169	print*,'You have enabled runoff, but you have no oceans.'
170	print*,'Where did you think the water was going to go?'
171	call abort
172	endif
173
174	firstcall = .false.
175	endif
176
177	! call writediagfi(ngrid,"hydrol_rnat"," "," ",2,rnat)
178	!! write (,) "oceanarea", oceanarea
179
180	! add physical tendencies already calculated
181	! ------------------------------------------
182
183	do ig=1,ngrid
184	ztsurf(ig) = tsurf(ig) + ptimestep*pdtsurf(ig)
185	pdtsurf_hyd(ig)=0.0
186	do iq=1,nq
187	zqsurf(ig,iq) = qsurf(ig,iq) + ptimestep*dqsurf(ig,iq)
188	enddo
189	enddo
190
191	! call writediagfi(ngrid,"hydrol_zqsurf_iliq_1"," "," ",2,zqsurf(1:ngrid,iliq))
192
193	do ig=1,ngrid
194	do iq=1,nq
195	dqs_hyd(ig,iq) = 0.0
196	enddo
197	enddo
198
199	do ig = 1, ngrid
200
201	! Ocean
202	! -----
203	if(nint(rnat(ig)).eq.0)then
204
205	! re-calculate oceanic albedo
206	! if(diurnal.and.oceanalbvary)then
207	! fauxo = ( 1.47 - ACOS( mu0(ig) ) )/0.15 ! where does this come from (Benjamin)?
208	! albedo(ig) = 1.1( .03 + .630/( 1. + fauxofauxo))
209	! albedo(ig) = MAX(MIN(albedo(ig),0.60),0.04)
210	! else
211	do nw=1,L_NSPECTV
212	albedo(ig,nw) = alb_ocean ! For now, alb_ocean is defined in inifis_mod.F90. Later we could introduce spectral dependency for alb_ocean.
213	enddo
214	! end if
215
216
217	if(ok_slab_ocean) then
218
219	zfra = MAX(0.0,MIN(1.0,zqsurf(ig,iice)/45.0)) ! Snow Fraction (Critical height 45kg/m2~15cm)
220	alb_ice=alb_ice_max-(alb_ice_max-alb_ice_min) & ! Ice Albedo
221	*exp(-sea_ice(ig)/h_alb_ice)
222	! Albedo final calculation :
223	do nw=1,L_NSPECTV
224	albedo(ig,nw) = pctsrf_sic(ig)* &
225	(albedo_snow_SPECTV(nw)zfra + alb_ice(1.0-zfra)) &
226	+ (1.-pctsrf_sic(ig))*alb_ocean
227	enddo
228
229	! Oceanic ice height, just for diagnostics
230	hice(ig) = MIN(10.,sea_ice(ig)/rhowater)
231	else !ok_slab_ocean
232
233
234	! calculate oceanic ice height including the latent heat of ice formation
235	! hice is the height of oceanic ice with a maximum of maxicethick.
236	hice(ig) = zqsurf(ig,iice)/rhowater ! update hice to include recent snowfall
237
238	! twater(ig) = tsurf(ig) + ptimestep*zdtsurf(ig) &
239	twater(ig) = ztsurf(ig) - hice(ig)RLFTTrhowater/pcapcal(ig)
240	! this is temperature water would have if we melted entire ocean ice layer
241	hicebis(ig) = hice(ig)
242	hice(ig) = 0.
243
244	if(twater(ig) .lt. T_h2O_ice_liq)then
245	E=min((T_h2O_ice_liq+Tsaldiff-twater(ig))pcapcal(ig),RLFTTrhowater*maxicethick)
246	hice(ig) = E/(RLFTT*rhowater)
247	hice(ig) = max(hice(ig),0.0)
248	hice(ig) = min(hice(ig),maxicethick)
249	pdtsurf_hyd(ig) = (hice(ig) - hicebis(ig))RLFTTrhowater/pcapcal(ig)/ptimestep
250	do nw=1,L_NSPECTV
251	albedo(ig,nw) = albedo_snow_SPECTV(nw) ! Albedo of ice has been replaced by albedo of snow here. MT2015.
252	enddo
253
254	! if (zqsurf(ig,iice).ge.snowlayer) then
255	! albedo(ig) = albedoice
256	! else
257	! albedo(ig) = albedoocean &
258	! + (albedosnow - albedoocean)*zqsurf(ig,iice)/snowlayer
259	! endif
260
261	else
262
263	pdtsurf_hyd(ig) = -hicebis(ig)RLFTTrhowater/pcapcal(ig)/ptimestep
264	DO nw=1,L_NSPECTV
265	albedo(ig,nw) = alb_ocean
266	ENDDO
267
268	endif
269
270	zqsurf(ig,iliq) = zqsurf(ig,iliq)-(hice(ig)*rhowater-zqsurf(ig,iice))
271	zqsurf(ig,iice) = hice(ig)*rhowater
272
273	endif!(ok_slab_ocean)
274
275
276	! Continent
277	! ---------
278	elseif (nint(rnat(ig)).eq.1) then
279
280	! melt the snow
281	if(ztsurf(ig).gt.T_h2O_ice_liq)then
282	if(zqsurf(ig,iice).gt.1.0e-8)then
283
284	a = (ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT
285	b = zqsurf(ig,iice)
286	fsnoi = min(a,b)
287
288	zqsurf(ig,iice) = zqsurf(ig,iice) - fsnoi
289	zqsurf(ig,iliq) = zqsurf(ig,iliq) + fsnoi
290
291	! thermal effects
292	pdtsurf_hyd(ig) = -fsnoi*RLFTT/pcapcal(ig)/ptimestep
293
294	endif
295	else
296
297	! freeze the water
298	if(zqsurf(ig,iliq).gt.1.0e-8)then
299
300	a = -(ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT
301	b = zqsurf(ig,iliq)
302
303	fsnoi = min(a,b)
304
305	zqsurf(ig,iice) = zqsurf(ig,iice) + fsnoi
306	zqsurf(ig,iliq) = zqsurf(ig,iliq) - fsnoi
307
308	! thermal effects
309	pdtsurf_hyd(ig) = +fsnoi*RLFTT/pcapcal(ig)/ptimestep
310
311	endif
312	endif
313
314	! deal with runoff
315	if(activerunoff)then
316	runoff(ig) = max(zqsurf(ig,iliq) - mx_eau_sol, 0.0)
317	if(ngrid.gt.1)then ! runoff only exists in 3D
318	if(runoff(ig).ne.0.0)then
319	zqsurf(ig,iliq) = mx_eau_sol
320	! runoff is added to ocean at end
321	endif
322	end if
323
324	endif
325
326	! re-calculate continental albedo
327	DO nw=1,L_NSPECTV
328	albedo(ig,nw) = albedo_bareground(ig)
329	ENDDO
330	if (zqsurf(ig,iice).ge.snowlayer) then
331	DO nw=1,L_NSPECTV
332	albedo(ig,nw) = albedo_snow_SPECTV(nw)
333	ENDDO
334	else
335	DO nw=1,L_NSPECTV
336	albedo(ig,nw) = albedo_bareground(ig) &
337	+ (albedo_snow_SPECTV(nw) - albedo_bareground(ig)) &
338	*zqsurf(ig,iice)/snowlayer
339	ENDDO
340	endif
341
342	else
343
344	print*,'Surface type not recognised in hydrol.F!'
345	print*,'Exiting...'
346	call abort
347
348	endif
349
350	end do ! ig=1,ngrid
351
352	! call writediagfi(ngrid,"hydrol_zqsurf_iliq_2"," "," ",2,zqsurf(1:ngrid,iliq))
353
354	! perform crude bulk averaging of temperature in ocean
355	! ----------------------------------------------------
356	if(oceanbulkavg)then
357
358	oceanarea2=0.
359	DO ig=1,ngrid
360	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then
361	oceanarea2=oceanarea2+cell_area(ig)*pcapcal(ig)
362	end if
363	END DO
364
365	tsea=0.
366	DO ig=1,ngrid
367	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then
368	tsea=tsea+ztsurf(ig)cell_area(ig)pcapcal(ig)/oceanarea2
369	end if
370	END DO
371
372	DO ig=1,ngrid
373	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0))then
374	pdtsurf_hyd(ig) = pdtsurf_hyd(ig) + (tsea-ztsurf(ig))/oceantime
375	end if
376	END DO
377
378	print*,'Mean ocean temperature = ',tsea,' K'
379
380	endif
381
382	! shove all the runoff water into the ocean
383	! -----------------------------------------
384	if(activerunoff)then
385
386	! totalrunoff=0.
387	do ig=1,ngrid
388	runoffamount(ig) = cell_area(ig)*runoff(ig)
389	! if (nint(rnat(ig)).eq.1) then
390	! totalrunoff = totalrunoff + cell_area(ig)*runoff(ig)
391	! endif
392	enddo
393
394	! collect on the full grid
395	call gather(runoffamount,runoffamount_glo)
396	call gather(zqsurf(1:ngrid,iliq),zqsurf_iliq_glo)
397	call gather(rnat,rnat_glo)
398	call gather(cell_area,cell_area_glo)
399
400	if (is_master) then
401	totalrunoff=0.
402	oceanarea_glo=0.
403	do ig=1,klon_glo
404	if (nint(rnat_glo(ig)).eq.1) then
405	totalrunoff = totalrunoff + runoffamount_glo(ig)
406	endif
407	if (nint(rnat_glo(ig)).eq.0) then
408	oceanarea_glo = oceanarea_glo + cell_area_glo(ig)
409	endif
410	enddo
411
412	do ig=1,klon_glo
413	if (nint(rnat_glo(ig)).eq.0) then
414	zqsurf_iliq_glo(ig) = zqsurf_iliq_glo(ig) + &
415	totalrunoff/oceanarea_glo
416	endif
417	enddo
418
419	endif! is_master
420
421	! scatter the field back on all processes
422	call scatter(zqsurf_iliq_glo,zqsurf(1:ngrid,iliq))
423
424
425
426	! do ig=1,ngrid
427	! if (nint(rnat(ig)).eq.0) then
428	! zqsurf(ig,iliq) = zqsurf(ig,iliq) + &
429	! totalrunoff/oceanarea
430	! endif
431	! enddo
432
433	endif !activerunoff
434
435	! call writediagfi(ngrid,"hydrol_zqsurf_iliq_3"," "," ",2,zqsurf(1:ngrid,iliq))
436
437	! Re-add the albedo effects of CO2 ice if necessary
438	! -------------------------------------------------
439	if(co2cond)then
440
441	do ig=1,ngrid
442	if (qsurf(ig,igcm_co2_ice).gt.1.) then ! Condition changed - Need now ~1 mm CO2 ice coverage. MT2015
443	DO nw=1,L_NSPECTV
444	albedo(ig,nw) = albedo_co2_ice_SPECTV(nw)
445	ENDDO
446	endif
447	enddo ! ngrid
448
449	endif ! co2cond
450
451
452	do ig=1,ngrid ! We calculate here the tracer tendencies. Don't forget that we have to retrieve the dqsurf tendencies we added at the beginning of the routine !
453	dqs_hyd(ig,iliq)=(zqsurf(ig,iliq) - qsurf(ig,iliq))/ptimestep - dqsurf(ig,iliq)
454	dqs_hyd(ig,iice)=(zqsurf(ig,iice) - qsurf(ig,iice))/ptimestep - dqsurf(ig,iice)
455	enddo
456
457	! call writediagfi(ngrid,"hydrol_dqs_hyd_iliq"," "," ",2,dqs_hyd(1:ngrid,iliq))
458
459	if (activerunoff) then
460	call writediagfi(ngrid,'runoff','Runoff amount',' ',2,runoff)
461	endif
462
463	return
464	end subroutine hydrol

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