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source: tags/ORCHIDEE_2_0/ORCHIDEE/src_parameters/constantes_var.f90 @ 5391

Last change on this file since 5391 was 5391, checked in by josefine.ghattas, 6 years ago
Integrated changeset [5389] done on the trunk in the tag. This is needed for ESM configurations with transported carbon. P Cadule
Property svn:keywords set to `Date Revision`
File size: 56.6 KB

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1	! =================================================================================================================================
2	! MODULE : constantes_var
3	!
4	! CONTACT : orchidee-help _at_ listes.ipsl.fr
5	!
6	! LICENCE : IPSL (2006)
7	! This software is governed by the CeCILL licence see ORCHIDEE/ORCHIDEE_CeCILL.LIC
8	!
9	!>\BRIEF constantes_var module contains most constantes like pi, Earth radius, etc...
10	!! and all externalized parameters except pft-dependent constants.
11	!!
12	!!\n DESCRIPTION: This module contains most constantes and the externalized parameters of ORCHIDEE which
13	!! are not pft-dependent.\n
14	!! In this module, you can set the flag diag_qsat in order to detect the pixel where the
15	!! temperature is out of range (look qsatcalc and dev_qsatcalc in qsat_moisture.f90).\n
16	!! The Earth radius is approximated by the Equatorial radius.The Earth's equatorial radius a,
17	!! or semi-major axis, is the distance from its center to the equator and equals 6,378.1370 km.
18	!! The equatorial radius is often used to compare Earth with other planets.\n
19	!! The meridional mean is well approximated by the semicubic mean of the two axe yielding
20	!! 6367.4491 km or less accurately by the quadratic mean of the two axes about 6,367.454 km
21	!! or even just the mean of the two axes about 6,367.445 km.\n
22	!! This module is already USE in module constantes. Therefor no need to USE it seperatly except
23	!! if the subroutines in module constantes are not needed.\n
24	!!
25	!! RECENT CHANGE(S):
26	!!
27	!! REFERENCE(S) :
28	!! - Louis, Jean-Francois (1979), A parametric model of vertical eddy fluxes in the atmosphere.
29	!! Boundary Layer Meteorology, 187-202.\n
30	!!
31	!! SVN :
32	!! $HeadURL: $
33	!! $Date$
34	!! $Revision$
35	!! \n
36	!_ ================================================================================================================================
37
38	MODULE constantes_var
39
40	USE defprec
41
42	IMPLICIT NONE
43	!-
44
45	!-----------------------!
46	! ORCHIDEE CONSTANTS !
47	!-----------------------!
48
49	!
50	! FLAGS
51	!
52	LOGICAL :: river_routing !! activate river routing
53	!$OMP THREADPRIVATE(river_routing)
54	LOGICAL :: hydrol_cwrr !! activate 11 layers hydrolgy model
55	!$OMP THREADPRIVATE(hydrol_cwrr)
56	LOGICAL, SAVE :: ok_nudge_mc !! Activate nudging of soil moisture
57	!$OMP THREADPRIVATE(ok_nudge_mc)
58	LOGICAL, SAVE :: ok_nudge_snow!! Activate nudging of snow variables
59	!$OMP THREADPRIVATE(ok_nudge_snow)
60	LOGICAL, SAVE :: nudge_interpol_with_xios !! Activate reading and interpolation with XIOS for nudging fields
61	!$OMP THREADPRIVATE(nudge_interpol_with_xios)
62	LOGICAL :: do_floodplains !! activate flood plains
63	!$OMP THREADPRIVATE(do_floodplains)
64	LOGICAL :: do_irrigation !! activate computation of irrigation flux
65	!$OMP THREADPRIVATE(do_irrigation)
66	LOGICAL :: ok_sechiba !! activate physic of the model
67	!$OMP THREADPRIVATE(ok_sechiba)
68	LOGICAL :: ok_co2 !! activate photosynthesis
69	!$OMP THREADPRIVATE(ok_co2)
70	LOGICAL :: ok_stomate !! activate carbon cycle
71	!$OMP THREADPRIVATE(ok_stomate)
72	LOGICAL :: ok_dgvm !! activate dynamic vegetation
73	!$OMP THREADPRIVATE(ok_dgvm)
74	LOGICAL :: do_wood_harvest !! activate wood harvest
75	!$OMP THREADPRIVATE(do_wood_harvest)
76	LOGICAL :: ok_pheno !! activate the calculation of lai using stomate rather than a prescription
77	!$OMP THREADPRIVATE(ok_pheno)
78	LOGICAL :: ok_bvoc !! activate biogenic volatile organic coumpounds
79	!$OMP THREADPRIVATE(ok_bvoc)
80	LOGICAL :: ok_leafage !! activate leafage
81	!$OMP THREADPRIVATE(ok_leafage)
82	LOGICAL :: ok_radcanopy !! use canopy radiative transfer model
83	!$OMP THREADPRIVATE(ok_radcanopy)
84	LOGICAL :: ok_multilayer !! use canopy radiative transfer model with multi-layers
85	!$OMP THREADPRIVATE(ok_multilayer)
86	LOGICAL :: ok_pulse_NOx !! calculate NOx emissions with pulse
87	!$OMP THREADPRIVATE(ok_pulse_NOx)
88	LOGICAL :: ok_bbgfertil_NOx !! calculate NOx emissions with bbg fertilizing effect
89	!$OMP THREADPRIVATE(ok_bbgfertil_NOx)
90	LOGICAL :: ok_cropsfertil_NOx !! calculate NOx emissions with fertilizers use
91	!$OMP THREADPRIVATE(ok_cropsfertil_NOx)
92
93	LOGICAL :: ok_co2bvoc_poss !! CO2 inhibition on isoprene activated following Possell et al. (2005) model
94	!$OMP THREADPRIVATE(ok_co2bvoc_poss)
95	LOGICAL :: ok_co2bvoc_wilk !! CO2 inhibition on isoprene activated following Wilkinson et al. (2006) model
96	!$OMP THREADPRIVATE(ok_co2bvoc_wilk)
97
98	LOGICAL, SAVE :: OFF_LINE_MODE = .FALSE. !! ORCHIDEE detects if it is coupled with a GCM or
99	!! just use with one driver in OFF-LINE. (true/false)
100	!$OMP THREADPRIVATE(OFF_LINE_MODE)
101	LOGICAL, SAVE :: impose_param = .TRUE. !! Flag impos_param : read all the parameters in the run.def file
102	!$OMP THREADPRIVATE(impose_param)
103	CHARACTER(LEN=80), SAVE :: restname_in = 'NONE' !! Input Restart files name for Sechiba component
104	!$OMP THREADPRIVATE(restname_in)
105	CHARACTER(LEN=80), SAVE :: restname_out = 'sechiba_rest_out.nc' !! Output Restart files name for Sechiba component
106	!$OMP THREADPRIVATE(restname_out)
107	CHARACTER(LEN=80), SAVE :: stom_restname_in = 'NONE' !! Input Restart files name for Stomate component
108	!$OMP THREADPRIVATE(stom_restname_in)
109	CHARACTER(LEN=80), SAVE :: stom_restname_out = 'stomate_rest_out.nc' !! Output Restart files name for Stomate component
110	!$OMP THREADPRIVATE(stom_restname_out)
111	INTEGER, SAVE :: printlev=2 !! Standard level for text output [0, 1, 2, 3]
112	!$OMP THREADPRIVATE(printlev)
113
114	!
115	! TIME
116	!
117	INTEGER(i_std), PARAMETER :: spring_days_max = 40 !! Maximum number of days during which we watch for possible spring frost damage
118	!
119	! SPECIAL VALUES
120	!
121	INTEGER(i_std), PARAMETER :: undef_int = 999999999 !! undef integer for integer arrays (unitless)
122	!-
123	REAL(r_std), SAVE :: val_exp = 999999. !! Specific value if no restart value (unitless)
124	!$OMP THREADPRIVATE(val_exp)
125	REAL(r_std), PARAMETER :: undef = -9999. !! Special value for stomate (unitless)
126
127	REAL(r_std), PARAMETER :: min_sechiba = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
128	REAL(r_std), PARAMETER :: undef_sechiba = 1.E+20_r_std !! The undef value used in SECHIBA (unitless)
129
130	REAL(r_std), PARAMETER :: min_stomate = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
131	REAL(r_std), PARAMETER :: large_value = 1.E33_r_std !! some large value (for stomate) (unitless)
132
133	REAL(r_std), SAVE :: alpha_nudge_mc !! Nudging constant for soil moisture
134	!$OMP THREADPRIVATE(alpha_nudge_mc)
135	REAL(r_std), SAVE :: alpha_nudge_snow !! Nudging constant for snow variables
136	!$OMP THREADPRIVATE(alpha_nudge_snow)
137
138	!
139	! DIMENSIONING AND INDICES PARAMETERS
140	!
141	INTEGER(i_std), PARAMETER :: ibare_sechiba = 1 !! Index for bare soil in Sechiba (unitless)
142	INTEGER(i_std), PARAMETER :: ivis = 1 !! index for albedo in visible range (unitless)
143	INTEGER(i_std), PARAMETER :: inir = 2 !! index for albeod i near-infrared range (unitless)
144	INTEGER(i_std), PARAMETER :: nnobio = 1 !! Number of other surface types: land ice (lakes,cities, ...) (unitless)
145	INTEGER(i_std), PARAMETER :: iice = 1 !! Index for land ice (see nnobio) (unitless)
146	!-
147	!! Soil
148	INTEGER(i_std), PARAMETER :: classnb = 9 !! Levels of soil colour classification (unitless)
149	!-
150	INTEGER(i_std), PARAMETER :: nleafages = 4 !! leaf age discretisation ( 1 = no discretisation )(unitless)
151	!-
152	!! litter fractions: indices (unitless)
153	INTEGER(i_std), PARAMETER :: ileaf = 1 !! Index for leaf compartment (unitless)
154	INTEGER(i_std), PARAMETER :: isapabove = 2 !! Index for sapwood above compartment (unitless)
155	INTEGER(i_std), PARAMETER :: isapbelow = 3 !! Index for sapwood below compartment (unitless)
156	INTEGER(i_std), PARAMETER :: iheartabove = 4 !! Index for heartwood above compartment (unitless)
157	INTEGER(i_std), PARAMETER :: iheartbelow = 5 !! Index for heartwood below compartment (unitless)
158	INTEGER(i_std), PARAMETER :: iroot = 6 !! Index for roots compartment (unitless)
159	INTEGER(i_std), PARAMETER :: ifruit = 7 !! Index for fruits compartment (unitless)
160	INTEGER(i_std), PARAMETER :: icarbres = 8 !! Index for reserve compartment (unitless)
161	INTEGER(i_std), PARAMETER :: nparts = 8 !! Number of biomass compartments (unitless)
162	!-
163	!! indices for assimilation parameters
164	INTEGER(i_std), PARAMETER :: ivcmax = 1 !! Index for vcmax (assimilation parameters) (unitless)
165	INTEGER(i_std), PARAMETER :: npco2 = 1 !! Number of assimilation parameters (unitless)
166	!-
167	!! trees and litter: indices for the parts of heart-
168	!! and sapwood above and below the ground
169	INTEGER(i_std), PARAMETER :: iabove = 1 !! Index for above part (unitless)
170	INTEGER(i_std), PARAMETER :: ibelow = 2 !! Index for below part (unitless)
171	INTEGER(i_std), PARAMETER :: nlevs = 2 !! Number of levels for trees and litter (unitless)
172	!-
173	!! litter: indices for metabolic and structural part
174	INTEGER(i_std), PARAMETER :: imetabolic = 1 !! Index for metabolic litter (unitless)
175	INTEGER(i_std), PARAMETER :: istructural = 2 !! Index for structural litter (unitless)
176	INTEGER(i_std), PARAMETER :: nlitt = 2 !! Number of levels for litter compartments (unitless)
177	!-
178	!! carbon pools: indices
179	INTEGER(i_std), PARAMETER :: iactive = 1 !! Index for active carbon pool (unitless)
180	INTEGER(i_std), PARAMETER :: islow = 2 !! Index for slow carbon pool (unitless)
181	INTEGER(i_std), PARAMETER :: ipassive = 3 !! Index for passive carbon pool (unitless)
182	INTEGER(i_std), PARAMETER :: ncarb = 3 !! Number of soil carbon pools (unitless)
183	!-
184	!! For isotopes and nitrogen
185	INTEGER(i_std), PARAMETER :: nelements = 1 !! Number of isotopes considered
186	INTEGER(i_std), PARAMETER :: icarbon = 1 !! Index for carbon
187	!
188	!! Indices used for analytical spin-up
189	INTEGER(i_std), PARAMETER :: nbpools = 7 !! Total number of carbon pools (unitless)
190	INTEGER(i_std), PARAMETER :: istructural_above = 1 !! Index for structural litter above (unitless)
191	INTEGER(i_std), PARAMETER :: istructural_below = 2 !! Index for structural litter below (unitless)
192	INTEGER(i_std), PARAMETER :: imetabolic_above = 3 !! Index for metabolic litter above (unitless)
193	INTEGER(i_std), PARAMETER :: imetabolic_below = 4 !! Index for metabolic litter below (unitless)
194	INTEGER(i_std), PARAMETER :: iactive_pool = 5 !! Index for active carbon pool (unitless)
195	INTEGER(i_std), PARAMETER :: islow_pool = 6 !! Index for slow carbon pool (unitless)
196	INTEGER(i_std), PARAMETER :: ipassive_pool = 7 !! Index for passive carbon pool (unitless)
197	!
198	!! Indicies used for output variables on Landuse tiles defined according to LUMIP project
199	!! Note that ORCHIDEE do not represent pasture and urban land. Therefor the variables will have
200	!! val_exp as missing value for these tiles.
201	INTEGER(i_std), PARAMETER :: nlut=4 !! Total number of landuse tiles according to LUMIP
202	INTEGER(i_std), PARAMETER :: id_psl=1 !! Index for primary and secondary land
203	INTEGER(i_std), PARAMETER :: id_crp=2 !! Index for crop land
204	INTEGER(i_std), PARAMETER :: id_pst=3 !! Index for pasture land
205	INTEGER(i_std), PARAMETER :: id_urb=4 !! Index for urban land
206
207
208	!
209	! NUMERICAL AND PHYSICS CONSTANTS
210	!
211	!
212
213	!-
214	! 1. Mathematical and numerical constants
215	!-
216	REAL(r_std), PARAMETER :: pi = 3.141592653589793238 !! pi souce : http://mathworld.wolfram.com/Pi.html (unitless)
217	REAL(r_std), PARAMETER :: euler = 2.71828182845904523 !! e source : http://mathworld.wolfram.com/e.html (unitless)
218	REAL(r_std), PARAMETER :: zero = 0._r_std !! Numerical constant set to 0 (unitless)
219	REAL(r_std), PARAMETER :: undemi = 0.5_r_std !! Numerical constant set to 1/2 (unitless)
220	REAL(r_std), PARAMETER :: un = 1._r_std !! Numerical constant set to 1 (unitless)
221	REAL(r_std), PARAMETER :: moins_un = -1._r_std !! Numerical constant set to -1 (unitless)
222	REAL(r_std), PARAMETER :: deux = 2._r_std !! Numerical constant set to 2 (unitless)
223	REAL(r_std), PARAMETER :: trois = 3._r_std !! Numerical constant set to 3 (unitless)
224	REAL(r_std), PARAMETER :: quatre = 4._r_std !! Numerical constant set to 4 (unitless)
225	REAL(r_std), PARAMETER :: cinq = 5._r_std !![DISPENSABLE] Numerical constant set to 5 (unitless)
226	REAL(r_std), PARAMETER :: six = 6._r_std !![DISPENSABLE] Numerical constant set to 6 (unitless)
227	REAL(r_std), PARAMETER :: huit = 8._r_std !! Numerical constant set to 8 (unitless)
228	REAL(r_std), PARAMETER :: mille = 1000._r_std !! Numerical constant set to 1000 (unitless)
229
230	!-
231	! 2 . Physics
232	!-
233	REAL(r_std), PARAMETER :: R_Earth = 6378000. !! radius of the Earth : Earth radius ~= Equatorial radius (m)
234	REAL(r_std), PARAMETER :: mincos = 0.0001 !! Minimum cosine value used for interpolation (unitless)
235	REAL(r_std), PARAMETER :: pb_std = 1013. !! standard pressure (hPa)
236	REAL(r_std), PARAMETER :: ZeroCelsius = 273.15 !! 0 degre Celsius in degre Kelvin (K)
237	REAL(r_std), PARAMETER :: tp_00 = 273.15 !! 0 degre Celsius in degre Kelvin (K)
238	REAL(r_std), PARAMETER :: chalsu0 = 2.8345E06 !! Latent heat of sublimation (J.kg^{-1})
239	REAL(r_std), PARAMETER :: chalev0 = 2.5008E06 !! Latent heat of evaporation (J.kg^{-1})
240	REAL(r_std), PARAMETER :: chalfu0 = chalsu0-chalev0 !! Latent heat of fusion (J.kg^{-1})
241	REAL(r_std), PARAMETER :: c_stefan = 5.6697E-8 !! Stefan-Boltzman constant (W.m^{-2}.K^{-4})
242	REAL(r_std), PARAMETER :: cp_air = 1004.675 !! Specific heat of dry air (J.kg^{-1}.K^{-1})
243	REAL(r_std), PARAMETER :: cte_molr = 287.05 !! Specific constant of dry air (kg.mol^{-1})
244	REAL(r_std), PARAMETER :: kappa = cte_molr/cp_air !! Kappa : ratio between specific constant and specific heat
245	!! of dry air (unitless)
246	REAL(r_std), PARAMETER :: msmlr_air = 28.964E-03 !! Molecular weight of dry air (kg.mol^{-1})
247	REAL(r_std), PARAMETER :: msmlr_h2o = 18.02E-03 !! Molecular weight of water vapor (kg.mol^{-1})
248	REAL(r_std), PARAMETER :: cp_h2o = & !! Specific heat of water vapor (J.kg^{-1}.K^{-1})
249	& cp_air(quatremsmlr_air)/( 3.5_r_std*msmlr_h2o)
250	REAL(r_std), PARAMETER :: cte_molr_h2o = cte_molr/quatre !! Specific constant of water vapor (J.kg^{-1}.K^{-1})
251	REAL(r_std), PARAMETER :: retv = msmlr_air/msmlr_h2o-un !! Ratio between molecular weight of dry air and water
252	!! vapor minus 1(unitless)
253	REAL(r_std), PARAMETER :: rvtmp2 = cp_h2o/cp_air-un !! Ratio between specific heat of water vapor and dry air
254	!! minus 1 (unitless)
255	REAL(r_std), PARAMETER :: cepdu2 = (0.1_r_std)**2 !! Squared wind shear (m^2.s^{-2})
256	REAL(r_std), PARAMETER :: ct_karman = 0.41_r_std !! Van Karmann Constant (unitless)
257	REAL(r_std), PARAMETER :: cte_grav = 9.80665_r_std !! Acceleration of the gravity (m.s^{-2})
258	REAL(r_std), PARAMETER :: pa_par_hpa = 100._r_std !! Transform pascal into hectopascal (unitless)
259	REAL(r_std), PARAMETER :: RR = 8.314 !! Ideal gas constant (J.mol^{-1}.K^{-1})
260	REAL(r_std), PARAMETER :: Sct = 1370. !! Solar constant (W.m^{-2})
261
262
263	INTEGER(i_std), SAVE :: testpft = 6
264	!-
265	! 3. Climatic constants
266	!-
267	!! Constantes of the Louis scheme
268	REAL(r_std), SAVE :: cb = 5._r_std !! Constant of the Louis scheme (unitless);
269	!! reference to Louis (1979)
270	!$OMP THREADPRIVATE(cb)
271	REAL(r_std), SAVE :: cc = 5._r_std !! Constant of the Louis scheme (unitless);
272	!! reference to Louis (1979)
273	!$OMP THREADPRIVATE(cc)
274	REAL(r_std), SAVE :: cd = 5._r_std !! Constant of the Louis scheme (unitless);
275	!! reference to Louis (1979)
276	!$OMP THREADPRIVATE(cd)
277	REAL(r_std), SAVE :: rayt_cste = 125. !! Constant in the computation of surface resistance (W.m^{-2})
278	!$OMP THREADPRIVATE(rayt_cste)
279	REAL(r_std), SAVE :: defc_plus = 23.E-3 !! Constant in the computation of surface resistance (K.W^{-1})
280	!$OMP THREADPRIVATE(defc_plus)
281	REAL(r_std), SAVE :: defc_mult = 1.5 !! Constant in the computation of surface resistance (K.W^{-1})
282	!$OMP THREADPRIVATE(defc_mult)
283
284	!-
285	! 4. Soil thermodynamics constants
286	!-
287	! Look at constantes_soil.f90
288
289
290	!
291	! OPTIONAL PARTS OF THE MODEL
292	!
293	LOGICAL,PARAMETER :: diag_qsat = .TRUE. !! One of the most frequent problems is a temperature out of range
294	!! we provide here a way to catch that in the calling procedure.
295	!! (from Jan Polcher)(true/false)
296	LOGICAL, SAVE :: almaoutput =.FALSE. !! Selects the type of output for the model.(true/false)
297	!! Value is read from run.def in intersurf_history
298	!$OMP THREADPRIVATE(almaoutput)
299
300	!
301	! DIVERSE
302	!
303	CHARACTER(LEN=100), SAVE :: stomate_forcing_name='NONE' !! NV080800 Name of STOMATE forcing file (unitless)
304	! Compatibility with Nicolas Viovy driver.
305	!$OMP THREADPRIVATE(stomate_forcing_name)
306	CHARACTER(LEN=100), SAVE :: stomate_Cforcing_name='NONE' !! NV080800 Name of soil forcing file (unitless)
307	! Compatibility with Nicolas Viovy driver.
308	!$OMP THREADPRIVATE(stomate_Cforcing_name)
309	INTEGER(i_std), SAVE :: forcing_id !! Index of the forcing file (unitless)
310	!$OMP THREADPRIVATE(forcing_id)
311	LOGICAL, SAVE :: allow_forcing_write=.TRUE. !! Allow writing of stomate_forcing file.
312	!! This variable will be set to false for teststomate.
313
314
315
316	!------------------------!
317	! SECHIBA PARAMETERS !
318	!------------------------!
319
320
321	!
322	! GLOBAL PARAMETERS
323	!
324	REAL(r_std), SAVE :: min_wind = 0.1 !! The minimum wind (m.s^{-1})
325	!$OMP THREADPRIVATE(min_wind)
326	REAL(r_std), SAVE :: snowcri = 1.5 !! Sets the amount above which only sublimation occures (kg.m^{-2})
327	!$OMP THREADPRIVATE(snowcri)
328
329
330	!
331	! FLAGS ACTIVATING SUB-MODELS
332	!
333	LOGICAL, SAVE :: treat_expansion = .FALSE. !! Do we treat PFT expansion across a grid point after introduction? (true/false)
334	!$OMP THREADPRIVATE(treat_expansion)
335	LOGICAL, SAVE :: ok_herbivores = .FALSE. !! flag to activate herbivores (true/false)
336	!$OMP THREADPRIVATE(ok_herbivores)
337	LOGICAL, SAVE :: harvest_agri = .TRUE. !! flag to harvest aboveground biomass from agricultural PFTs)(true/false)
338	!$OMP THREADPRIVATE(harvest_agri)
339	LOGICAL, SAVE :: lpj_gap_const_mort !! constant moratlity (true/false). Default value depend on OK_DGVM.
340	!$OMP THREADPRIVATE(lpj_gap_const_mort)
341	LOGICAL, SAVE :: disable_fire = .TRUE. !! flag that disable fire (true/false)
342	!$OMP THREADPRIVATE(disable_fire)
343	LOGICAL, SAVE :: spinup_analytic = .FALSE. !! Flag to activate analytical resolution for spinup (true/false)
344	!$OMP THREADPRIVATE(spinup_analytic)
345	LOGICAL, SAVE :: ok_explicitsnow !! Flag to activate explicit snow scheme instead of default snow scheme
346	!$OMP THREADPRIVATE(ok_explicitsnow)
347
348	!
349	! CONFIGURATION VEGETATION
350	!
351	LOGICAL, SAVE :: agriculture = .TRUE. !! allow agricultural PFTs (true/false)
352	!$OMP THREADPRIVATE(agriculture)
353	LOGICAL, SAVE :: impveg = .FALSE. !! Impose vegetation ? (true/false)
354	!$OMP THREADPRIVATE(impveg)
355	LOGICAL, SAVE :: impsoilt = .FALSE. !! Impose soil ? (true/false)
356	!$OMP THREADPRIVATE(impsoilt)
357	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
358	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
359	LOGICAL, SAVE :: do_now_stomate_woodharvest = .FALSE. !! Time to call woodharvest in stomate_lpj
360	!$OMP THREADPRIVATE(do_now_stomate_woodharvest)
361	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
362	!$OMP THREADPRIVATE(done_stomate_lcchange)
363	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
364	!$OMP THREADPRIVATE(read_lai)
365	LOGICAL, SAVE :: map_pft_format = .TRUE. !! Read a land use vegetation map on PFT format (true/false)
366	!$OMP THREADPRIVATE(map_pft_format)
367	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
368	!$OMP THREADPRIVATE(veget_reinit)
369	INTEGER(i_std) , SAVE :: veget_update !! Update frequency in years for landuse (nb of years)
370	!$OMP THREADPRIVATE(veget_update)
371	!
372	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
373	!
374	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
375	!$OMP THREADPRIVATE(max_snow_age)
376	REAL(r_std), SAVE :: snow_trans = 0.2_r_std !! Transformation time constant for snow (m), reduced from the value 0.3 (04/07/2016)
377	!$OMP THREADPRIVATE(snow_trans)
378	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
379	!$OMP THREADPRIVATE(sneige)
380	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
381	!$OMP THREADPRIVATE(maxmass_snow)
382
383	!! Heat capacity
384	REAL(r_std), PARAMETER :: capa_ice = 2.228*1.E3 !! Heat capacity of ice (J/kg/K)
385	REAL(r_std), SAVE :: so_capa_ice !! Heat capacity of saturated frozen soil (J/K/m3)
386	!$OMP THREADPRIVATE(so_capa_ice)
387	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
388	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
389	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
390
391	!! Thermal conductivities
392	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
393	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
394	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
395
396	!! Time constant of long-term soil humidity (s)
397	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
398
399	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
400	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
401	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
402	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
403	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
404	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
405	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
406	REAL(r_std), PARAMETER :: thick_min_snow = .01
407
408	!! The maximum snow density and water holding characterisicts
409	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
410	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
411	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
412	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
413	REAL(r_std), SAVE :: xrhosmin = 50.
414	REAL(r_std), PARAMETER :: xci = 2.106e+3
415	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
416
417	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
418	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
419
420	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
421	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
422
423	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
424	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
425	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
426	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
427
428	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
429
430	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
431	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
432	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
433
434	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
435
436	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
437	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
438	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
439	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
440
441	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
442	! (sig only for new snow OR high altitudes)
443	! from Sun et al. (1999): based on data from Jordan (1991)
444	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
445	!
446	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
447	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
448	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
449
450	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
451	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
452	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
453	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
454
455	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
456	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
457	REAL(r_std), PARAMETER :: XP00 = 1.E5
458
459	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
460	! (sig only for new snow OR high altitudes)
461	! from Sun et al. (1999): based on data from Jordan (1991)
462	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
463	!
464	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
465	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s)
466	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
467	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
468	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
469	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
470	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
471
472	!
473	! BVOC : Biogenic activity for each age class
474	!
475	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
476	!! age class : isoprene (unitless)
477	!$OMP THREADPRIVATE(iso_activity)
478	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
479	!! age class : methanol (unnitless)
480	!$OMP THREADPRIVATE(methanol_activity)
481
482	!
483	! condveg.f90
484	!
485
486	! 1. Scalar
487
488	! 1.1 Flags used inside the module
489
490	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
491	!! albedo (see header of subroutine)
492	!! (true/false)
493	!$OMP THREADPRIVATE(alb_bare_model)
494	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
495	!! albedo read from file
496	!! (true/false)
497	!$OMP THREADPRIVATE(alb_bg_modis)
498	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
499	!! (see header of subroutine).
500	!! (true/false)
501	!$OMP THREADPRIVATE(impaze)
502	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
503	!! the roughness height : static or dynamic (varying with LAI)
504	!! (true/false)
505	!$OMP THREADPRIVATE(rough_dyn)
506
507	LOGICAL, SAVE :: new_watstress = .FALSE.
508	!$OMP THREADPRIVATE(new_watstress)
509
510	REAL(r_std), SAVE :: alpha_watstress = 1.
511	!$OMP THREADPRIVATE(alpha_watstress)
512
513	! 1.2 Others
514
515
516	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
517	!! height from vegetation height (m)
518	!$OMP THREADPRIVATE(height_displacement)
519	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
520	!$OMP THREADPRIVATE(z0_bare)
521	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
522	!$OMP THREADPRIVATE(z0_ice)
523	REAL(r_std), SAVE :: tcst_snowa = 10.0 !! Time constant of the albedo decay of snow (days), increased from the value 5.0 (04/07/2016)
524	!$OMP THREADPRIVATE(tcst_snowa)
525	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
526	!$OMP THREADPRIVATE(snowcri_alb)
527	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
528	!$OMP THREADPRIVATE(fixed_snow_albedo)
529	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
530	!$OMP THREADPRIVATE(z0_scal)
531	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
532	!! displacement height (m) (imposed)
533	!$OMP THREADPRIVATE(roughheight_scal)
534	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
535	!$OMP THREADPRIVATE(emis_scal)
536
537	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
538	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
539	!! see Ershadi et al. (2015) for more info
540	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
541	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
542	!! see Ershadi et al. (2015) for more info
543	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
544	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
545	!! see Ershadi et al. (2015) for more info
546	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
547	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
548	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
549	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
550	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
551	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
552
553
554
555	! 2. Arrays
556
557	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
558	!$OMP THREADPRIVATE(alb_deadleaf)
559	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
560	!$OMP THREADPRIVATE(alb_ice)
561	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
562	!! used imposed (unitless)
563	!$OMP THREADPRIVATE(albedo_scal)
564	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
565	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
566	!! dry soil albedo values in visible range
567	!$OMP THREADPRIVATE(vis_dry)
568	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
569	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
570	!! dry soil albedo values in near-infrared range
571	!$OMP THREADPRIVATE(nir_dry)
572	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
573	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
574	!! wet soil albedo values in visible range
575	!$OMP THREADPRIVATE(vis_wet)
576	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
577	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
578	!! wet soil albedo values in near-infrared range
579	!$OMP THREADPRIVATE(nir_wet)
580	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
581	&0.18, 0.16, 0.16, 0.15, 0.12, 0.105, 0.09, 0.075, 0.25/) !! Soil albedo values to soil colour classification:
582	!! Averaged of wet and dry soil albedo values
583	!! in visible and near-infrared range
584	!$OMP THREADPRIVATE(albsoil_vis)
585	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
586	&0.36, 0.34, 0.34, 0.33, 0.30, 0.25, 0.20, 0.15, 0.45/) !! Soil albedo values to soil colour classification:
587	!! Averaged of wet and dry soil albedo values
588	!! in visible and near-infrared range
589	!$OMP THREADPRIVATE(albsoil_nir)
590
591	!
592	! diffuco.f90
593	!
594
595	! 0. Constants
596
597	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
598	!! of dry air (unitless)
599	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
600	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
601	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
602	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
603	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
604
605	! 1. Scalar
606
607	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
608	!$OMP THREADPRIVATE(nlai)
609	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
610	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
611	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
612	!$OMP THREADPRIVATE(laimax)
613	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation.
614	!$OMP THREADPRIVATE(downregulation_co2)
615	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
616	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
617
618	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
619
620	! 3. Coefficients of equations
621
622	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
623	!$OMP THREADPRIVATE(lai_level_depth)
624	!
625	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
626	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
627	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
628	!
629	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
630	!$OMP THREADPRIVATE(Oi)
631	!
632	! slowproc.f90
633	!
634
635	! 1. Scalar
636
637	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
638	!$OMP THREADPRIVATE(veget_year_orig)
639	! The default value for clay fraction is an heritage, with no documentation nor justification.
640	REAL(r_std), SAVE :: clayfraction_default = 0.2 !! Default value for clay fraction (0-1, unitless)
641	!$OMP THREADPRIVATE(clayfraction_default)
642	! We need to output sand and silt fractiosn for SP-MIP, and the following default values, corresponding to a Loamy soil, are selected.
643	REAL(r_std), SAVE :: sandfraction_default = 0.4 !! Default value for sand fraction (0-1, unitless)
644	!$OMP THREADPRIVATE(sandfraction_default)
645	REAL(r_std), SAVE :: siltfraction_default = 0.4 !! Default value for silt fraction (0-1, unitless)
646	!$OMP THREADPRIVATE(siltfraction_default)
647	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
648	!$OMP THREADPRIVATE(min_vegfrac)
649	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
650	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
651
652	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
653	!$OMP THREADPRIVATE(stempdiag_bid)
654
655
656	!-----------------------------!
657	! STOMATE AND LPJ PARAMETERS !
658	!-----------------------------!
659
660
661	!
662	! lpj_constraints.f90
663	!
664
665	! 1. Scalar
666
667	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
668	!! regeneration (vernalization) (years)
669	!$OMP THREADPRIVATE(too_long)
670
671
672	!
673	! lpj_establish.f90
674	!
675
676	! 1. Scalar
677
678	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
679	!$OMP THREADPRIVATE(estab_max_tree)
680	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
681	!$OMP THREADPRIVATE(estab_max_grass)
682
683	! 3. Coefficients of equations
684
685	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
686	!$OMP THREADPRIVATE(establish_scal_fact)
687	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
688	!$OMP THREADPRIVATE(max_tree_coverage)
689	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
690	!$OMP THREADPRIVATE(ind_0_estab)
691
692
693	!
694	! lpj_fire.f90
695	!
696
697	! 1. Scalar
698
699	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
700	!$OMP THREADPRIVATE(tau_fire)
701	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
702	!! below which iginitions extinguish
703	!! @tex $(gC m^{-2})$ @endtex
704	!$OMP THREADPRIVATE(litter_crit)
705	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
706	!$OMP THREADPRIVATE(fire_resist_struct)
707	! 2. Arrays
708
709	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
710	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
711	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
712
713	! 3. Coefficients of equations
714
715	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
716	!$OMP THREADPRIVATE(bcfrac_coeff)
717	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
718	!$OMP THREADPRIVATE(firefrac_coeff)
719
720	!
721	! lpj_gap.f90
722	!
723
724	! 1. Scalar
725
726	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
727	!! @tex $(year^{-1})$ @endtex
728	!$OMP THREADPRIVATE(ref_greff)
729
730	!
731	! lpj_light.f90
732	!
733
734	! 1. Scalar
735
736	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
737	!! to fpc of last time step (F)? (true/false)
738	!$OMP THREADPRIVATE(annual_increase)
739	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
740	!! (due to its branches etc.) (0-1, unitless)
741	!! This means that only a small fraction of its crown area
742	!! can be invaded by other trees.
743	!$OMP THREADPRIVATE(min_cover)
744	!
745	! lpj_pftinout.f90
746	!
747
748	! 1. Scalar
749
750	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
751	!$OMP THREADPRIVATE(min_avail)
752	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
753	!$OMP THREADPRIVATE(ind_0)
754	! 3. Coefficients of equations
755
756	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
757	!$OMP THREADPRIVATE(RIP_time_min)
758	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
759	!$OMP THREADPRIVATE(npp_longterm_init)
760	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
761	!$OMP THREADPRIVATE(everywhere_init)
762
763
764	!
765	! stomate_alloc.f90
766	!
767
768	! 0. Constants
769
770	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
771	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
772
773	! 1. Scalar
774
775	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
776	!! we are severely stressed? (true/false)
777	!$OMP THREADPRIVATE(ok_minres)
778	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
779	!! carbohydrate reserve may be used for
780	!! trees (days)
781	!$OMP THREADPRIVATE(reserve_time_tree)
782	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
783	!! carbohydrate reserve may be used for
784	!! grasses (days)
785	!$OMP THREADPRIVATE(reserve_time_grass)
786
787	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
788	!$OMP THREADPRIVATE(f_fruit)
789	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
790	!! for grass (0-1, unitless)
791	!$OMP THREADPRIVATE(alloc_sap_above_grass)
792	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
793	!! allocation (0-1, unitless)
794	!$OMP THREADPRIVATE(min_LtoLSR)
795	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
796	!! allocation (0-1, unitless)
797	!$OMP THREADPRIVATE(max_LtoLSR)
798	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
799	!$OMP THREADPRIVATE(z_nitrogen)
800
801	! 3. Coefficients of equations
802
803	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
804	!$OMP THREADPRIVATE(Nlim_tref)
805
806
807	!
808	! stomate_data.f90
809	!
810
811	! 1. Scalar
812
813	! 1.1 Parameters for the pipe model
814
815	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
816	!$OMP THREADPRIVATE(pipe_tune1)
817	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
818	!$OMP THREADPRIVATE(pipe_tune2)
819	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
820	!$OMP THREADPRIVATE(pipe_tune3)
821	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
822	!$OMP THREADPRIVATE(pipe_tune4)
823	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
824	!$OMP THREADPRIVATE(pipe_density)
825	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
826	!$OMP THREADPRIVATE(pipe_k1)
827	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
828	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
829
830	! 1.2 climatic parameters
831
832	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
833	!$OMP THREADPRIVATE(precip_crit)
834	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
835	!$OMP THREADPRIVATE(gdd_crit_estab)
836	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
837	!$OMP THREADPRIVATE(fpc_crit)
838
839	! 1.3 sapling characteristics
840
841	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
842	!$OMP THREADPRIVATE(alpha_grass)
843	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
844	!$OMP THREADPRIVATE(alpha_tree)
845	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
846	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
847
848	! 1.4 time scales for phenology and other processes (in days)
849
850	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
851	!$OMP THREADPRIVATE(tau_hum_month)
852	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
853	!$OMP THREADPRIVATE(tau_hum_week)
854	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
855	!$OMP THREADPRIVATE(tau_t2m_month)
856	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
857	!$OMP THREADPRIVATE(tau_t2m_week)
858	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
859	!$OMP THREADPRIVATE(tau_tsoil_month)
860	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
861	!$OMP THREADPRIVATE(tau_soilhum_month)
862	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
863	!$OMP THREADPRIVATE(tau_gpp_week)
864	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
865	!$OMP THREADPRIVATE(tau_gdd)
866	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
867	!$OMP THREADPRIVATE(tau_ngd)
868	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
869	!$OMP THREADPRIVATE(coeff_tau_longterm)
870	REAL(r_std), SAVE :: tau_longterm_max !! (days)
871	!$OMP THREADPRIVATE(tau_longterm_max)
872
873	! 3. Coefficients of equations
874
875	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
876	!$OMP THREADPRIVATE(bm_sapl_carbres)
877	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
878	!$OMP THREADPRIVATE(bm_sapl_sapabove)
879	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
880	!$OMP THREADPRIVATE(bm_sapl_heartabove)
881	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
882	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
883	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
884	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
885	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
886	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
887	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
888	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
889	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
890	!$OMP THREADPRIVATE(init_sapl_mass_root)
891	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
892	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
893	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
894	!$OMP THREADPRIVATE(cn_sapl_init)
895	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
896	!$OMP THREADPRIVATE(migrate_tree)
897	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
898	!$OMP THREADPRIVATE(migrate_grass)
899	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
900	!$OMP THREADPRIVATE(lai_initmin_tree)
901	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
902	!$OMP THREADPRIVATE(lai_initmin_grass)
903	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
904	!$OMP THREADPRIVATE(dia_coeff)
905	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
906	!$OMP THREADPRIVATE(maxdia_coeff)
907	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
908	!$OMP THREADPRIVATE(bm_sapl_leaf)
909
910
911
912	!
913	! stomate_litter.f90
914	!
915
916	! 0. Constants
917
918	REAL(r_std), PARAMETER :: Q10 = 10. !!
919
920	! 1. Scalar
921
922	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
923	!$OMP THREADPRIVATE(z_decomp)
924
925	! 2. Arrays
926
927	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
928	!$OMP THREADPRIVATE(frac_soil_struct_aa)
929	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
930	!$OMP THREADPRIVATE(frac_soil_struct_ab)
931	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
932	!$OMP THREADPRIVATE(frac_soil_struct_sa)
933	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
934	!$OMP THREADPRIVATE(frac_soil_struct_sb)
935	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
936	!$OMP THREADPRIVATE(frac_soil_metab_aa)
937	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
938	!$OMP THREADPRIVATE(frac_soil_metab_ab)
939	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
940	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
941	!$OMP THREADPRIVATE(CN)
942	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
943	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
944	!$OMP THREADPRIVATE(LC)
945
946	! 3. Coefficients of equations
947
948	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
949	!$OMP THREADPRIVATE(metabolic_ref_frac)
950	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
951	!$OMP THREADPRIVATE(metabolic_LN_ratio)
952	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
953	!$OMP THREADPRIVATE(tau_metabolic)
954	REAL(r_std), SAVE :: tau_struct = 0.245 !!
955	!$OMP THREADPRIVATE(tau_struct)
956	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
957	!$OMP THREADPRIVATE(soil_Q10)
958	REAL(r_std), SAVE :: tsoil_ref = 30. !!
959	!$OMP THREADPRIVATE(tsoil_ref)
960	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
961	!$OMP THREADPRIVATE(litter_struct_coef)
962	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
963	!$OMP THREADPRIVATE(moist_coeff)
964	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
965	!$OMP THREADPRIVATE(moistcont_min)
966
967
968	!
969	! stomate_lpj.f90
970	!
971
972	! 1. Scalar
973
974	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
975	!$OMP THREADPRIVATE(frac_turnover_daily)
976
977
978	!
979	! stomate_npp.f90
980	!
981
982	! 1. Scalar
983
984	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
985	!! for maintenance respiration (0-1, unitless)
986	!$OMP THREADPRIVATE(tax_max)
987
988
989	!
990	! stomate_phenology.f90
991	!
992
993	! 1. Scalar
994
995	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
996	!$OMP THREADPRIVATE(min_growthinit_time)
997	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
998	!! - for trees (0-1, unitless)
999	!$OMP THREADPRIVATE(moiavail_always_tree)
1000	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1001	!! - for grass (0-1, unitless)
1002	!$OMP THREADPRIVATE(moiavail_always_grass)
1003	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1004	!$OMP THREADPRIVATE(t_always)
1005	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1006	!$OMP THREADPRIVATE(t_always_add)
1007
1008	! 3. Coefficients of equations
1009
1010	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1011	!$OMP THREADPRIVATE(gddncd_ref)
1012	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1013	!$OMP THREADPRIVATE(gddncd_curve)
1014	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1015	!$OMP THREADPRIVATE(gddncd_offset)
1016
1017
1018	!
1019	! stomate_prescribe.f90
1020	!
1021
1022	! 3. Coefficients of equations
1023
1024	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1025	!$OMP THREADPRIVATE(bm_sapl_rescale)
1026
1027
1028	!
1029	! stomate_resp.f90
1030	!
1031
1032	! 3. Coefficients of equations
1033
1034	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1035	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1036	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1037	!$OMP THREADPRIVATE(maint_resp_coeff)
1038
1039
1040	!
1041	! stomate_soilcarbon.f90
1042	!
1043
1044	! 2. Arrays
1045
1046	! 2.1 frac_carb_coefficients
1047
1048	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1049	!! corresponding to frac_carb(:,iactive,ipassive)
1050	!$OMP THREADPRIVATE(frac_carb_ap)
1051	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1052	!! corresponding to frac_carb(:,islow,iactive)
1053	!$OMP THREADPRIVATE(frac_carb_sa)
1054	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1055	!! corresponding to frac_carb(:,islow,ipassive)
1056	!$OMP THREADPRIVATE(frac_carb_sp)
1057	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1058	!! corresponding to frac_carb(:,ipassive,iactive)
1059	!$OMP THREADPRIVATE(frac_carb_pa)
1060	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1061	!! corresponding to frac_carb(:,ipassive,islow)
1062	!$OMP THREADPRIVATE(frac_carb_ps)
1063
1064	! 3. Coefficients of equations
1065
1066	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1067	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1068	!! residence times in carbon pools (days)
1069	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1070	!$OMP THREADPRIVATE(carbon_tau_iactive)
1071	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1072	!$OMP THREADPRIVATE(carbon_tau_islow)
1073	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1074	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1075	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1076	!$OMP THREADPRIVATE(flux_tot_coeff)
1077
1078	!
1079	! stomate_turnover.f90
1080	!
1081
1082	! 3. Coefficients of equations
1083
1084	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1085	!$OMP THREADPRIVATE(new_turnover_time_ref)
1086	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1087	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1088	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1089	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1090
1091
1092	!
1093	! stomate_vmax.f90
1094	!
1095
1096	! 1. Scalar
1097
1098	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1099	!$OMP THREADPRIVATE(vmax_offset)
1100	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1101	!! reaches 1 (unitless)
1102	!$OMP THREADPRIVATE(leafage_firstmax)
1103	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1104	!! falls below 1 (unitless)
1105	!$OMP THREADPRIVATE(leafage_lastmax)
1106	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1107	!! reaches its minimum (vmax_offset)
1108	!! (unitless)
1109	!$OMP THREADPRIVATE(leafage_old)
1110	!
1111	! stomate_season.f90
1112	!
1113
1114	! 1. Scalar
1115
1116	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1117	!$OMP THREADPRIVATE(gppfrac_dormance)
1118	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1119	!$OMP THREADPRIVATE(tau_climatology)
1120	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1121	!$OMP THREADPRIVATE(hvc1)
1122	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1123	!$OMP THREADPRIVATE(hvc2)
1124	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1125	!$OMP THREADPRIVATE(leaf_frac_hvc)
1126	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1127	!$OMP THREADPRIVATE(tlong_ref_max)
1128	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1129	!$OMP THREADPRIVATE(tlong_ref_min)
1130
1131	! 3. Coefficients of equations
1132
1133	REAL(r_std), SAVE :: ncd_max_year = 3.
1134	!$OMP THREADPRIVATE(ncd_max_year)
1135	REAL(r_std), SAVE :: gdd_threshold = 5.
1136	!$OMP THREADPRIVATE(gdd_threshold)
1137	REAL(r_std), SAVE :: green_age_ever = 2.
1138	!$OMP THREADPRIVATE(green_age_ever)
1139	REAL(r_std), SAVE :: green_age_dec = 0.5
1140	!$OMP THREADPRIVATE(green_age_dec)
1141
1142	END MODULE constantes_var

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