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hydrol.F90 @ 3279

Last change on this file since 3279 was 3270, checked in by mturbet, 23 months ago
physiq_mod.F90 cleaning + add moist and dry adjustment heating tendencies
Property svn:executable set to ``*
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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,alb_ice_min,h_alb_ice,snow_min
18	use callkeys_mod, only: albedosnow,alb_ocean,albedoco2ice,ok_slab_ocean,Tsaldiff,maxicethick,co2cond
19	use radinc_h, only : L_NSPECTV
20
21	implicit none
22
23	!==================================================================
24	!
25	! Purpose
26	! -------
27	! Calculate the surface hydrology and albedo changes.
28	! Both for oceanic and continental regions
29	!
30	! Authors
31	! -------
32	! Adapted from LMDTERRE by B. Charnay (2010). Further
33	! Modifications by R. Wordsworth (2010).
34	! Spectral albedo by M. Turbet (2015).
35	!
36	! Called by
37	! ---------
38	! physiq.F
39	!
40	! Calls
41	! -----
42	! none
43	!
44	! Notes
45	! -----
46	! rnat is terrain type: 0-ocean; 1-continent
47	!
48	!==================================================================
49
50	integer ngrid,nq
51
52	! Inputs
53	! ------
54	real snowlayer
55	parameter (snowlayer=33.0) ! 33 kg/m^2 of snow, equal to a layer of 3.3 cm
56
57	real oceantime ! this is a relaxation timescale for the oceanbulkavg parameterization
58	parameter (oceantime=10243600)
59	logical,save :: oceanbulkavg ! simple parameterization to relax ocean temperatures to the global mean value (crude, 0th order parameterization to mimick ocean heat transport)
60
61	logical,save :: activerunoff ! enable simple runoff scheme?
62	logical,save :: oceanalbvary ! simple parameterization to account for the effect of solar zenith angle on the ocean albedo (for the moment it is not used, but to be included in the future)
63	!$OMP THREADPRIVATE(oceanbulkavg,activerunoff,oceanalbvary)
64
65	! Arguments
66	! ---------
67	real rnat(ngrid) ! rnat is terrain type: 0-ocean; 1-continent
68	real,dimension(:),allocatable,save :: runoff
69	real totalrunoff, tsea, oceanarea
70	save oceanarea
71	!$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 frac_snow
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	if (activerunoff) then
133	ALLOCATE(runoff(ngrid))
134	runoff(1:ngrid)=0
135	endif
136
137	ivap=igcm_h2o_vap
138	iliq=igcm_h2o_vap
139	iice=igcm_h2o_ice
140
141	write(,) "hydrol: ivap=",ivap
142	write(,) " iliq=",iliq
143	write(,) " iice=",iice
144
145	! Here's the deal: iice is used in place of igcm_h2o_ice both on the
146	! surface and in the atmosphere. ivap is used in
147	! place of igcm_h2o_vap ONLY in the atmosphere, while
148	! iliq is used in place of igcm_h2o_vap ONLY on the
149	! surface.
150	! Soon to be extended to the entire water cycle...
151
152	! LOCAL ocean surface area
153	oceanarea=0.
154	do ig=1,ngrid
155	if(nint(rnat(ig)).eq.0)then
156	oceanarea=oceanarea+cell_area(ig)
157	endif
158	enddo
159
160	if(oceanbulkavg.and.(oceanarea.le.0.))then
161	print*,'How are we supposed to average the ocean'
162	print*,'temperature, when there are no oceans?'
163	call abort
164	endif
165
166	if(activerunoff.and.(oceanarea.le.0.))then
167	print*,'You have enabled runoff, but you have no oceans.'
168	print*,'Where did you think the water was going to go?'
169	call abort
170	endif
171
172	firstcall = .false.
173	endif
174
175	! write (,) "oceanarea", oceanarea
176
177	! add physical tendencies already calculated
178	! ------------------------------------------
179
180	do ig=1,ngrid
181	ztsurf(ig) = tsurf(ig) + ptimestep*pdtsurf(ig)
182	pdtsurf_hyd(ig)=0.0
183	do iq=1,nq
184	zqsurf(ig,iq) = qsurf(ig,iq) + ptimestep*dqsurf(ig,iq)
185	enddo
186	enddo
187
188	do ig=1,ngrid
189	do iq=1,nq
190	dqs_hyd(ig,iq) = 0.0
191	enddo
192	enddo
193
194	do ig = 1, ngrid
195
196	! Ocean regions (rnat = 0)
197	! -----------------------
198	if(nint(rnat(ig)).eq.0)then
199
200	! Parameterization (not used for the moment) to compute the effect of solar zenith angle on the albedo
201	! --------------------------
202	!
203	! if(diurnal.and.oceanalbvary)then
204	! fauxo = ( 1.47 - ACOS( mu0(ig) ) )/0.15 ! where does this come from (Benjamin)?
205	! albedo(ig) = 1.1( .03 + .630/( 1. + fauxofauxo))
206	! albedo(ig) = MAX(MIN(albedo(ig),0.60),0.04)
207	! else
208	!
209	! do nw=1,L_NSPECTV
210	! albedo(ig,nw) = alb_ocean ! For now, alb_ocean is defined in inifis_mod.F90. Later we could introduce spectral dependency for alb_ocean.
211	! enddo
212	! end if
213
214	! we first start by fixing the albedo of oceanic grid to that of the ocean
215	do nw=1,L_NSPECTV
216	albedo(ig,nw) = alb_ocean ! For now, alb_ocean is defined in inifis_mod.F90. Later we could introduce spectral dependency for alb_ocean.
217	enddo
218
219	if(ok_slab_ocean) then ! if ocean heat transport param activated
220
221	frac_snow = MAX(0.0,MIN(1.0,zqsurf(ig,iice)/snow_min)) ! Critical snow height (in kg/m2) from ocean_slab_ice routine.
222	! Standard value should be 15kg/m2 (i.e. about 5 cm). Note that in the previous ocean param. (from BC2014), this value was 45kg/m2 (i.e. about 15cm).
223	alb_ice=alb_ice_max-(alb_ice_max-alb_ice_min)*exp(-sea_ice(ig)/h_alb_ice) ! this is the old formulation from BC2014 (earth-centric so will be replaced)
224	! Albedo final calculation :
225	do nw=1,L_NSPECTV
226	albedo(ig,nw) = pctsrf_sic(ig)* &
227	(albedo_snow_SPECTV(nw)frac_snow + alb_ice(1.0-frac_snow)) &
228	+ (1.-pctsrf_sic(ig))*alb_ocean
229	enddo
230
231	! Oceanic ice height, just for diagnostics
232	hice(ig) = MIN(10.,sea_ice(ig)/rhowater)
233	else !ok_slab_ocean ; here this is the case where we are dealing with a static ocean
234
235
236	! calculate oceanic ice height including the latent heat of ice formation
237	! hice is the height of oceanic ice with a maximum of maxicethick.
238	hice(ig) = zqsurf(ig,iice)/rhowater ! update hice to include recent snowfall
239	twater(ig) = ztsurf(ig) - hice(ig)RLFTTrhowater/pcapcal(ig) ! this is the temperature water would have if we melted the entire ocean ice layer
240	hicebis(ig) = hice(ig)
241	hice(ig) = 0.
242
243	if(twater(ig) .lt. T_h2O_ice_liq)then
244	E=min((T_h2O_ice_liq+Tsaldiff-twater(ig))pcapcal(ig),RLFTTrhowater*maxicethick)
245	hice(ig) = E/(RLFTT*rhowater)
246	hice(ig) = max(hice(ig),0.0)
247	hice(ig) = min(hice(ig),maxicethick)
248	pdtsurf_hyd(ig) = (hice(ig) - hicebis(ig))RLFTTrhowater/pcapcal(ig)/ptimestep
249	do nw=1,L_NSPECTV
250	albedo(ig,nw) = albedo_snow_SPECTV(nw) ! Albedo of ice has been replaced by albedo of snow here. MT2015.
251	enddo
252
253	! if (zqsurf(ig,iice).ge.snowlayer) then
254	! albedo(ig) = albedoice
255	! else
256	! albedo(ig) = albedoocean &
257	! + (albedosnow - albedoocean)*zqsurf(ig,iice)/snowlayer
258	! endif
259
260	else
261
262	pdtsurf_hyd(ig) = -hicebis(ig)RLFTTrhowater/pcapcal(ig)/ptimestep
263	DO nw=1,L_NSPECTV
264	albedo(ig,nw) = alb_ocean
265	ENDDO
266
267	endif
268
269	zqsurf(ig,iliq) = zqsurf(ig,iliq)-(hice(ig)*rhowater-zqsurf(ig,iice))
270	zqsurf(ig,iice) = hice(ig)*rhowater
271
272	endif!(ok_slab_ocean)
273
274
275	! Continental regions (rnat = 1)
276	! -----------------------
277	elseif (nint(rnat(ig)).eq.1) then
278
279	! melt the snow
280	if(ztsurf(ig).gt.T_h2O_ice_liq)then
281	if(zqsurf(ig,iice).gt.1.0e-8)then
282
283	a = (ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT
284	b = zqsurf(ig,iice)
285	fsnoi = min(a,b)
286
287	zqsurf(ig,iice) = zqsurf(ig,iice) - fsnoi
288	zqsurf(ig,iliq) = zqsurf(ig,iliq) + fsnoi
289
290	! thermal effects
291	pdtsurf_hyd(ig) = -fsnoi*RLFTT/pcapcal(ig)/ptimestep
292
293	endif
294	else
295
296	! freeze the water
297	if(zqsurf(ig,iliq).gt.1.0e-8)then
298
299	a = -(ztsurf(ig)-T_h2O_ice_liq)*pcapcal(ig)/RLFTT
300	b = zqsurf(ig,iliq)
301
302	fsnoi = min(a,b)
303
304	zqsurf(ig,iice) = zqsurf(ig,iice) + fsnoi
305	zqsurf(ig,iliq) = zqsurf(ig,iliq) - fsnoi
306
307	! thermal effects
308	pdtsurf_hyd(ig) = +fsnoi*RLFTT/pcapcal(ig)/ptimestep
309
310	endif
311	endif
312
313	! add runoff (to simulate transport of water from continental regions to oceanic regions ; in practice, this prevents liquid water to build up too much on continental regions)
314	if(activerunoff)then
315	runoff(ig) = max(zqsurf(ig,iliq) - mx_eau_sol, 0.0)
316	if(ngrid.gt.1)then ! runoff only exists in 3D
317	if(runoff(ig).ne.0.0)then
318	zqsurf(ig,iliq) = mx_eau_sol
319	! note: runoff is added to ocean at end
320	endif
321	end if
322
323	endif
324
325	! re-calculate continental albedo
326	DO nw=1,L_NSPECTV
327	albedo(ig,nw) = albedo_bareground(ig)
328	ENDDO
329	if (zqsurf(ig,iice).ge.snowlayer) then
330	DO nw=1,L_NSPECTV
331	albedo(ig,nw) = albedo_snow_SPECTV(nw)
332	ENDDO
333	else
334	DO nw=1,L_NSPECTV
335	albedo(ig,nw) = albedo_bareground(ig) &
336	+ (albedo_snow_SPECTV(nw) - albedo_bareground(ig)) &
337	*zqsurf(ig,iice)/snowlayer
338	ENDDO
339	endif
340
341	else
342
343	print*,'Surface type not recognised in hydrol.F!'
344	print*,'Exiting...'
345	call abort
346
347	endif
348
349	end do ! ig=1,ngrid
350
351
352	! simple parameterization to perform crude bulk averaging of temperature in ocean
353	! ----------------------------------------------------
354	if(oceanbulkavg)then
355
356	oceanarea2=0.
357	DO ig=1,ngrid
358	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then
359	oceanarea2=oceanarea2+cell_area(ig)*pcapcal(ig)
360	end if
361	END DO
362
363	tsea=0.
364	DO ig=1,ngrid
365	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0.))then
366	tsea=tsea+ztsurf(ig)cell_area(ig)pcapcal(ig)/oceanarea2
367	end if
368	END DO
369
370	DO ig=1,ngrid
371	if((nint(rnat(ig)).eq.0).and.(hice(ig).eq.0))then
372	pdtsurf_hyd(ig) = pdtsurf_hyd(ig) + (tsea-ztsurf(ig))/oceantime
373	end if
374	END DO
375
376	print*,'Mean ocean temperature = ',tsea,' K'
377
378	endif
379
380	! shove all the runoff water into the ocean
381	! -----------------------------------------
382	if(activerunoff)then
383
384	! totalrunoff=0.
385	do ig=1,ngrid
386	runoffamount(ig) = cell_area(ig)*runoff(ig)
387	! if (nint(rnat(ig)).eq.1) then
388	! totalrunoff = totalrunoff + cell_area(ig)*runoff(ig)
389	! endif
390	enddo
391
392	! collect on the full grid
393	call gather(runoffamount,runoffamount_glo)
394	call gather(zqsurf(1:ngrid,iliq),zqsurf_iliq_glo)
395	call gather(rnat,rnat_glo)
396	call gather(cell_area,cell_area_glo)
397
398	if (is_master) then
399	totalrunoff=0.
400	oceanarea_glo=0.
401	do ig=1,klon_glo
402	if (nint(rnat_glo(ig)).eq.1) then
403	totalrunoff = totalrunoff + runoffamount_glo(ig)
404	endif
405	if (nint(rnat_glo(ig)).eq.0) then
406	oceanarea_glo = oceanarea_glo + cell_area_glo(ig)
407	endif
408	enddo
409
410	do ig=1,klon_glo
411	if (nint(rnat_glo(ig)).eq.0) then
412	zqsurf_iliq_glo(ig) = zqsurf_iliq_glo(ig) + &
413	totalrunoff/oceanarea_glo
414	endif
415	enddo
416
417	endif! is_master
418
419	! scatter the field back on all processes
420	call scatter(zqsurf_iliq_glo,zqsurf(1:ngrid,iliq))
421
422
423
424	! do ig=1,ngrid
425	! if (nint(rnat(ig)).eq.0) then
426	! zqsurf(ig,iliq) = zqsurf(ig,iliq) + &
427	! totalrunoff/oceanarea
428	! endif
429	! enddo
430
431	endif !activerunoff
432
433	! Re-add the albedo effects of CO2 ice if necessary
434	! -------------------------------------------------
435	if(co2cond)then
436
437	do ig=1,ngrid
438	if (qsurf(ig,igcm_co2_ice).gt.1.) then ! Condition changed - Need now ~1 mm CO2 ice coverage. MT2015
439	DO nw=1,L_NSPECTV
440	albedo(ig,nw) = albedo_co2_ice_SPECTV(nw)
441	ENDDO
442	endif
443	enddo ! ngrid
444
445	endif ! co2cond
446
447
448	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 !
449	dqs_hyd(ig,iliq)=(zqsurf(ig,iliq) - qsurf(ig,iliq))/ptimestep - dqsurf(ig,iliq)
450	dqs_hyd(ig,iice)=(zqsurf(ig,iice) - qsurf(ig,iice))/ptimestep - dqsurf(ig,iice)
451	enddo
452
453	if (activerunoff) then
454	call writediagfi(ngrid,'runoff','Runoff amount',' ',2,runoff)
455	endif
456
457	return
458	end subroutine hydrol

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