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source: branches/ORCHIDEE_2_2/ORCHIDEE/src_parameters/constantes_var.f90 @ 7547

Last change on this file since 7547 was 7547, checked in by agnes.ducharne, 2 years ago
Create new flag IMPOSE_SLOPE to control the possibility to impose a uniform reinf_slope for surface runoff reinfiltration. orchidee.default is manually updated.
Property svn:keywords set to `Date Revision`
File size: 56.9 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	!$OMP THREADPRIVATE(river_routing)
54	LOGICAL, SAVE :: ok_nudge_mc !! Activate nudging of soil moisture
55	!$OMP THREADPRIVATE(ok_nudge_mc)
56	LOGICAL, SAVE :: ok_nudge_snow!! Activate nudging of snow variables
57	!$OMP THREADPRIVATE(ok_nudge_snow)
58	LOGICAL, SAVE :: nudge_interpol_with_xios !! Activate reading and interpolation with XIOS for nudging fields
59	!$OMP THREADPRIVATE(nudge_interpol_with_xios)
60	LOGICAL :: do_floodplains !! activate flood plains
61	!$OMP THREADPRIVATE(do_floodplains)
62	LOGICAL :: do_irrigation !! activate computation of irrigation flux
63	!$OMP THREADPRIVATE(do_irrigation)
64	LOGICAL :: ok_sechiba !! activate physic of the model
65	!$OMP THREADPRIVATE(ok_sechiba)
66	LOGICAL :: ok_stomate !! activate carbon cycle
67	!$OMP THREADPRIVATE(ok_stomate)
68	LOGICAL :: ok_dgvm !! activate dynamic vegetation
69	!$OMP THREADPRIVATE(ok_dgvm)
70	LOGICAL :: do_wood_harvest !! activate wood harvest
71	!$OMP THREADPRIVATE(do_wood_harvest)
72	LOGICAL :: ok_pheno !! activate the calculation of lai using stomate rather than a prescription
73	!$OMP THREADPRIVATE(ok_pheno)
74	LOGICAL :: ok_bvoc !! activate biogenic volatile organic coumpounds
75	!$OMP THREADPRIVATE(ok_bvoc)
76	LOGICAL :: ok_leafage !! activate leafage
77	!$OMP THREADPRIVATE(ok_leafage)
78	LOGICAL :: ok_radcanopy !! use canopy radiative transfer model
79	!$OMP THREADPRIVATE(ok_radcanopy)
80	LOGICAL :: ok_multilayer !! use canopy radiative transfer model with multi-layers
81	!$OMP THREADPRIVATE(ok_multilayer)
82	LOGICAL :: ok_pulse_NOx !! calculate NOx emissions with pulse
83	!$OMP THREADPRIVATE(ok_pulse_NOx)
84	LOGICAL :: ok_bbgfertil_NOx !! calculate NOx emissions with bbg fertilizing effect
85	!$OMP THREADPRIVATE(ok_bbgfertil_NOx)
86	LOGICAL :: ok_cropsfertil_NOx !! calculate NOx emissions with fertilizers use
87	!$OMP THREADPRIVATE(ok_cropsfertil_NOx)
88
89	LOGICAL :: ok_co2bvoc_poss !! CO2 inhibition on isoprene activated following Possell et al. (2005) model
90	!$OMP THREADPRIVATE(ok_co2bvoc_poss)
91	LOGICAL :: ok_co2bvoc_wilk !! CO2 inhibition on isoprene activated following Wilkinson et al. (2006) model
92	!$OMP THREADPRIVATE(ok_co2bvoc_wilk)
93
94	LOGICAL, SAVE :: OFF_LINE_MODE = .FALSE. !! ORCHIDEE detects if it is coupled with a GCM or
95	!! just use with one driver in OFF-LINE. (true/false)
96	!$OMP THREADPRIVATE(OFF_LINE_MODE)
97	LOGICAL, SAVE :: impose_param = .TRUE. !! Flag impos_param : read all the parameters in the run.def file
98	!$OMP THREADPRIVATE(impose_param)
99	CHARACTER(LEN=80), SAVE :: restname_in = 'NONE' !! Input Restart files name for Sechiba component
100	!$OMP THREADPRIVATE(restname_in)
101	CHARACTER(LEN=80), SAVE :: restname_out = 'sechiba_rest_out.nc' !! Output Restart files name for Sechiba component
102	!$OMP THREADPRIVATE(restname_out)
103	CHARACTER(LEN=80), SAVE :: stom_restname_in = 'NONE' !! Input Restart files name for Stomate component
104	!$OMP THREADPRIVATE(stom_restname_in)
105	CHARACTER(LEN=80), SAVE :: stom_restname_out = 'stomate_rest_out.nc' !! Output Restart files name for Stomate component
106	!$OMP THREADPRIVATE(stom_restname_out)
107	INTEGER, SAVE :: printlev=2 !! Standard level for text output [0, 1, 2, 3]
108	!$OMP THREADPRIVATE(printlev)
109
110	!
111	! TIME
112	!
113	INTEGER(i_std), PARAMETER :: spring_days_max = 40 !! Maximum number of days during which we watch for possible spring frost damage
114	!
115	! SPECIAL VALUES
116	!
117	INTEGER(i_std), PARAMETER :: undef_int = 999999999 !! undef integer for integer arrays (unitless)
118	!-
119	REAL(r_std), SAVE :: val_exp = 999999. !! Specific value if no restart value (unitless)
120	!$OMP THREADPRIVATE(val_exp)
121	REAL(r_std), PARAMETER :: undef = -9999. !! Special value for stomate (unitless)
122
123	REAL(r_std), PARAMETER :: min_sechiba = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
124	REAL(r_std), PARAMETER :: undef_sechiba = 1.E+20_r_std !! The undef value used in SECHIBA (unitless)
125
126	REAL(r_std), PARAMETER :: min_stomate = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
127	REAL(r_std), PARAMETER :: large_value = 1.E33_r_std !! some large value (for stomate) (unitless)
128
129	REAL(r_std), SAVE :: alpha_nudge_mc !! Nudging constant for soil moisture
130	!$OMP THREADPRIVATE(alpha_nudge_mc)
131	REAL(r_std), SAVE :: alpha_nudge_snow !! Nudging constant for snow variables
132	!$OMP THREADPRIVATE(alpha_nudge_snow)
133
134	!
135	! DIMENSIONING AND INDICES PARAMETERS
136	!
137	INTEGER(i_std), PARAMETER :: ibare_sechiba = 1 !! Index for bare soil in Sechiba (unitless)
138	INTEGER(i_std), PARAMETER :: ivis = 1 !! index for albedo in visible range (unitless)
139	INTEGER(i_std), PARAMETER :: inir = 2 !! index for albeod i near-infrared range (unitless)
140	INTEGER(i_std), PARAMETER :: nnobio = 1 !! Number of other surface types: land ice (lakes,cities, ...) (unitless)
141	INTEGER(i_std), PARAMETER :: iice = 1 !! Index for land ice (see nnobio) (unitless)
142	!-
143	!! Soil
144	INTEGER(i_std), PARAMETER :: classnb = 9 !! Levels of soil colour classification (unitless)
145	!-
146	INTEGER(i_std), PARAMETER :: nleafages = 4 !! leaf age discretisation ( 1 = no discretisation )(unitless)
147	!-
148	!! litter fractions: indices (unitless)
149	INTEGER(i_std), PARAMETER :: ileaf = 1 !! Index for leaf compartment (unitless)
150	INTEGER(i_std), PARAMETER :: isapabove = 2 !! Index for sapwood above compartment (unitless)
151	INTEGER(i_std), PARAMETER :: isapbelow = 3 !! Index for sapwood below compartment (unitless)
152	INTEGER(i_std), PARAMETER :: iheartabove = 4 !! Index for heartwood above compartment (unitless)
153	INTEGER(i_std), PARAMETER :: iheartbelow = 5 !! Index for heartwood below compartment (unitless)
154	INTEGER(i_std), PARAMETER :: iroot = 6 !! Index for roots compartment (unitless)
155	INTEGER(i_std), PARAMETER :: ifruit = 7 !! Index for fruits compartment (unitless)
156	INTEGER(i_std), PARAMETER :: icarbres = 8 !! Index for reserve compartment (unitless)
157	INTEGER(i_std), PARAMETER :: nparts = 8 !! Number of biomass compartments (unitless)
158	!-
159	!! indices for assimilation parameters
160	INTEGER(i_std), PARAMETER :: ivcmax = 1 !! Index for vcmax (assimilation parameters) (unitless)
161	INTEGER(i_std), PARAMETER :: npco2 = 1 !! Number of assimilation parameters (unitless)
162	!-
163	!! trees and litter: indices for the parts of heart-
164	!! and sapwood above and below the ground
165	INTEGER(i_std), PARAMETER :: iabove = 1 !! Index for above part (unitless)
166	INTEGER(i_std), PARAMETER :: ibelow = 2 !! Index for below part (unitless)
167	INTEGER(i_std), PARAMETER :: nlevs = 2 !! Number of levels for trees and litter (unitless)
168	!-
169	!! litter: indices for metabolic and structural part
170	INTEGER(i_std), PARAMETER :: imetabolic = 1 !! Index for metabolic litter (unitless)
171	INTEGER(i_std), PARAMETER :: istructural = 2 !! Index for structural litter (unitless)
172	INTEGER(i_std), PARAMETER :: nlitt = 2 !! Number of levels for litter compartments (unitless)
173	!-
174	!! carbon pools: indices
175	INTEGER(i_std), PARAMETER :: iactive = 1 !! Index for active carbon pool (unitless)
176	INTEGER(i_std), PARAMETER :: islow = 2 !! Index for slow carbon pool (unitless)
177	INTEGER(i_std), PARAMETER :: ipassive = 3 !! Index for passive carbon pool (unitless)
178	INTEGER(i_std), PARAMETER :: ncarb = 3 !! Number of soil carbon pools (unitless)
179	!-
180	!! For isotopes and nitrogen
181	INTEGER(i_std), PARAMETER :: nelements = 1 !! Number of isotopes considered
182	INTEGER(i_std), PARAMETER :: icarbon = 1 !! Index for carbon
183	!
184	!! Indices used for analytical spin-up
185	INTEGER(i_std), PARAMETER :: nbpools = 7 !! Total number of carbon pools (unitless)
186	INTEGER(i_std), PARAMETER :: istructural_above = 1 !! Index for structural litter above (unitless)
187	INTEGER(i_std), PARAMETER :: istructural_below = 2 !! Index for structural litter below (unitless)
188	INTEGER(i_std), PARAMETER :: imetabolic_above = 3 !! Index for metabolic litter above (unitless)
189	INTEGER(i_std), PARAMETER :: imetabolic_below = 4 !! Index for metabolic litter below (unitless)
190	INTEGER(i_std), PARAMETER :: iactive_pool = 5 !! Index for active carbon pool (unitless)
191	INTEGER(i_std), PARAMETER :: islow_pool = 6 !! Index for slow carbon pool (unitless)
192	INTEGER(i_std), PARAMETER :: ipassive_pool = 7 !! Index for passive carbon pool (unitless)
193	!
194	!! Indicies used for output variables on Landuse tiles defined according to LUMIP project
195	!! Note that ORCHIDEE do not represent pasture and urban land. Therefor the variables will have
196	!! val_exp as missing value for these tiles.
197	INTEGER(i_std), PARAMETER :: nlut=4 !! Total number of landuse tiles according to LUMIP
198	INTEGER(i_std), PARAMETER :: id_psl=1 !! Index for primary and secondary land
199	INTEGER(i_std), PARAMETER :: id_crp=2 !! Index for crop land
200	INTEGER(i_std), PARAMETER :: id_pst=3 !! Index for pasture land
201	INTEGER(i_std), PARAMETER :: id_urb=4 !! Index for urban land
202
203
204	!
205	! NUMERICAL AND PHYSICS CONSTANTS
206	!
207	!
208
209	!-
210	! 1. Mathematical and numerical constants
211	!-
212	REAL(r_std), PARAMETER :: pi = 3.141592653589793238 !! pi souce : http://mathworld.wolfram.com/Pi.html (unitless)
213	REAL(r_std), PARAMETER :: euler = 2.71828182845904523 !! e source : http://mathworld.wolfram.com/e.html (unitless)
214	REAL(r_std), PARAMETER :: zero = 0._r_std !! Numerical constant set to 0 (unitless)
215	REAL(r_std), PARAMETER :: undemi = 0.5_r_std !! Numerical constant set to 1/2 (unitless)
216	REAL(r_std), PARAMETER :: un = 1._r_std !! Numerical constant set to 1 (unitless)
217	REAL(r_std), PARAMETER :: moins_un = -1._r_std !! Numerical constant set to -1 (unitless)
218	REAL(r_std), PARAMETER :: deux = 2._r_std !! Numerical constant set to 2 (unitless)
219	REAL(r_std), PARAMETER :: trois = 3._r_std !! Numerical constant set to 3 (unitless)
220	REAL(r_std), PARAMETER :: quatre = 4._r_std !! Numerical constant set to 4 (unitless)
221	REAL(r_std), PARAMETER :: cinq = 5._r_std !![DISPENSABLE] Numerical constant set to 5 (unitless)
222	REAL(r_std), PARAMETER :: six = 6._r_std !![DISPENSABLE] Numerical constant set to 6 (unitless)
223	REAL(r_std), PARAMETER :: huit = 8._r_std !! Numerical constant set to 8 (unitless)
224	REAL(r_std), PARAMETER :: mille = 1000._r_std !! Numerical constant set to 1000 (unitless)
225
226	!-
227	! 2 . Physics
228	!-
229	REAL(r_std), PARAMETER :: R_Earth = 6378000. !! radius of the Earth : Earth radius ~= Equatorial radius (m)
230	REAL(r_std), PARAMETER :: mincos = 0.0001 !! Minimum cosine value used for interpolation (unitless)
231	REAL(r_std), PARAMETER :: pb_std = 1013. !! standard pressure (hPa)
232	REAL(r_std), PARAMETER :: ZeroCelsius = 273.15 !! 0 degre Celsius in degre Kelvin (K)
233	REAL(r_std), PARAMETER :: tp_00 = 273.15 !! 0 degre Celsius in degre Kelvin (K)
234	REAL(r_std), PARAMETER :: chalsu0 = 2.8345E06 !! Latent heat of sublimation (J.kg^{-1})
235	REAL(r_std), PARAMETER :: chalev0 = 2.5008E06 !! Latent heat of evaporation (J.kg^{-1})
236	REAL(r_std), PARAMETER :: chalfu0 = chalsu0-chalev0 !! Latent heat of fusion (J.kg^{-1})
237	REAL(r_std), PARAMETER :: c_stefan = 5.6697E-8 !! Stefan-Boltzman constant (W.m^{-2}.K^{-4})
238	REAL(r_std), PARAMETER :: cp_air = 1004.675 !! Specific heat of dry air (J.kg^{-1}.K^{-1})
239	REAL(r_std), PARAMETER :: cte_molr = 287.05 !! Specific constant of dry air (kg.mol^{-1})
240	REAL(r_std), PARAMETER :: kappa = cte_molr/cp_air !! Kappa : ratio between specific constant and specific heat
241	!! of dry air (unitless)
242	REAL(r_std), PARAMETER :: msmlr_air = 28.964E-03 !! Molecular weight of dry air (kg.mol^{-1})
243	REAL(r_std), PARAMETER :: msmlr_h2o = 18.02E-03 !! Molecular weight of water vapor (kg.mol^{-1})
244	REAL(r_std), PARAMETER :: cp_h2o = & !! Specific heat of water vapor (J.kg^{-1}.K^{-1})
245	& cp_air(quatremsmlr_air)/( 3.5_r_std*msmlr_h2o)
246	REAL(r_std), PARAMETER :: cte_molr_h2o = cte_molr/quatre !! Specific constant of water vapor (J.kg^{-1}.K^{-1})
247	REAL(r_std), PARAMETER :: retv = msmlr_air/msmlr_h2o-un !! Ratio between molecular weight of dry air and water
248	!! vapor minus 1(unitless)
249	REAL(r_std), PARAMETER :: rvtmp2 = cp_h2o/cp_air-un !! Ratio between specific heat of water vapor and dry air
250	!! minus 1 (unitless)
251	REAL(r_std), PARAMETER :: cepdu2 = (0.1_r_std)**2 !! Squared wind shear (m^2.s^{-2})
252	REAL(r_std), PARAMETER :: ct_karman = 0.41_r_std !! Van Karmann Constant (unitless)
253	REAL(r_std), PARAMETER :: cte_grav = 9.80665_r_std !! Acceleration of the gravity (m.s^{-2})
254	REAL(r_std), PARAMETER :: pa_par_hpa = 100._r_std !! Transform pascal into hectopascal (unitless)
255	REAL(r_std), PARAMETER :: RR = 8.314 !! Ideal gas constant (J.mol^{-1}.K^{-1})
256	REAL(r_std), PARAMETER :: Sct = 1370. !! Solar constant (W.m^{-2})
257
258
259	INTEGER(i_std), SAVE :: testpft = 6
260	!$OMP THREADPRIVATE(testpft)
261	!-
262	! 3. Climatic constants
263	!-
264	!! Constantes of the Louis scheme
265	REAL(r_std), SAVE :: cb = 5._r_std !! Constant of the Louis scheme (unitless);
266	!! reference to Louis (1979)
267	!$OMP THREADPRIVATE(cb)
268	REAL(r_std), SAVE :: cc = 5._r_std !! Constant of the Louis scheme (unitless);
269	!! reference to Louis (1979)
270	!$OMP THREADPRIVATE(cc)
271	REAL(r_std), SAVE :: cd = 5._r_std !! Constant of the Louis scheme (unitless);
272	!! reference to Louis (1979)
273	!$OMP THREADPRIVATE(cd)
274	REAL(r_std), SAVE :: rayt_cste = 125. !! Constant in the computation of surface resistance (W.m^{-2})
275	!$OMP THREADPRIVATE(rayt_cste)
276	REAL(r_std), SAVE :: defc_plus = 23.E-3 !! Constant in the computation of surface resistance (K.W^{-1})
277	!$OMP THREADPRIVATE(defc_plus)
278	REAL(r_std), SAVE :: defc_mult = 1.5 !! Constant in the computation of surface resistance (K.W^{-1})
279	!$OMP THREADPRIVATE(defc_mult)
280
281	!-
282	! 4. Soil thermodynamics constants
283	!-
284	! Look at constantes_soil.f90
285
286
287	!
288	! OPTIONAL PARTS OF THE MODEL
289	!
290	LOGICAL,PARAMETER :: diag_qsat = .TRUE. !! One of the most frequent problems is a temperature out of range
291	!! we provide here a way to catch that in the calling procedure.
292	!! (from Jan Polcher)(true/false)
293	LOGICAL, SAVE :: almaoutput =.FALSE. !! Selects the type of output for the model.(true/false)
294	!! Value is read from run.def in intersurf_history
295	!$OMP THREADPRIVATE(almaoutput)
296
297	!
298	! DIVERSE
299	!
300	CHARACTER(LEN=100), SAVE :: stomate_forcing_name='NONE' !! NV080800 Name of STOMATE forcing file (unitless)
301	! Compatibility with Nicolas Viovy driver.
302	!$OMP THREADPRIVATE(stomate_forcing_name)
303	CHARACTER(LEN=100), SAVE :: stomate_Cforcing_name='NONE' !! NV080800 Name of soil forcing file (unitless)
304	! Compatibility with Nicolas Viovy driver.
305	!$OMP THREADPRIVATE(stomate_Cforcing_name)
306	INTEGER(i_std), SAVE :: forcing_id !! Index of the forcing file (unitless)
307	!$OMP THREADPRIVATE(forcing_id)
308	LOGICAL, SAVE :: allow_forcing_write=.TRUE. !! Allow writing of stomate_forcing file.
309	!! This variable will be set to false for teststomate.
310	!$OMP THREADPRIVATE(allow_forcing_write)
311
312
313
314	!------------------------!
315	! SECHIBA PARAMETERS !
316	!------------------------!
317
318
319	!
320	! GLOBAL PARAMETERS
321	!
322	REAL(r_std), SAVE :: min_wind = 0.1 !! The minimum wind (m.s^{-1})
323	!$OMP THREADPRIVATE(min_wind)
324	REAL(r_std), PARAMETER :: min_qc = 1.e-4 !! The minimum value for qc (qc=drag*wind) used in coupled(enerbil) and forced mode (enerbil and diffuco)
325	REAL(r_std), SAVE :: snowcri = 1.5 !! Sets the amount above which only sublimation occures (kg.m^{-2})
326	!$OMP THREADPRIVATE(snowcri)
327
328
329	!
330	! FLAGS ACTIVATING SUB-MODELS
331	!
332	LOGICAL, SAVE :: treat_expansion = .FALSE. !! Do we treat PFT expansion across a grid point after introduction? (true/false)
333	!$OMP THREADPRIVATE(treat_expansion)
334	LOGICAL, SAVE :: ok_herbivores = .FALSE. !! flag to activate herbivores (true/false)
335	!$OMP THREADPRIVATE(ok_herbivores)
336	LOGICAL, SAVE :: harvest_agri = .TRUE. !! flag to harvest aboveground biomass from agricultural PFTs)(true/false)
337	!$OMP THREADPRIVATE(harvest_agri)
338	LOGICAL, SAVE :: lpj_gap_const_mort !! constant moratlity (true/false). Default value depend on OK_DGVM.
339	!$OMP THREADPRIVATE(lpj_gap_const_mort)
340	LOGICAL, SAVE :: disable_fire = .TRUE. !! flag that disable fire (true/false)
341	!$OMP THREADPRIVATE(disable_fire)
342	LOGICAL, SAVE :: spinup_analytic = .FALSE. !! Flag to activate analytical resolution for spinup (true/false)
343	!$OMP THREADPRIVATE(spinup_analytic)
344
345	!
346	! CONFIGURATION VEGETATION
347	!
348	LOGICAL, SAVE :: agriculture = .TRUE. !! allow agricultural PFTs (true/false)
349	!$OMP THREADPRIVATE(agriculture)
350	LOGICAL, SAVE :: impveg = .FALSE. !! Impose vegetation ? (true/false)
351	!$OMP THREADPRIVATE(impveg)
352	LOGICAL, SAVE :: impsoilt = .FALSE. !! Impose soil ? (true/false)
353	!$OMP THREADPRIVATE(impsoilt)
354	LOGICAL, SAVE :: impslope = .FALSE. !! Impose reinf_slope ? (true/false)
355	!$OMP THREADPRIVATE(impslope)
356	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
357	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
358	LOGICAL, SAVE :: do_now_stomate_woodharvest = .FALSE. !! Time to call woodharvest in stomate_lpj
359	!$OMP THREADPRIVATE(do_now_stomate_woodharvest)
360	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
361	!$OMP THREADPRIVATE(done_stomate_lcchange)
362	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
363	!$OMP THREADPRIVATE(read_lai)
364	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
365	!$OMP THREADPRIVATE(veget_reinit)
366	LOGICAL, SAVE :: vegetmap_reset = .FALSE.!! Reset the vegetation map and reset carbon related variables
367	!$OMP THREADPRIVATE(vegetmap_reset)
368	INTEGER(i_std) , SAVE :: veget_update !! Update frequency in years for landuse (nb of years)
369	!$OMP THREADPRIVATE(veget_update)
370	!
371	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
372	!
373	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
374	!$OMP THREADPRIVATE(max_snow_age)
375	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)
376	!$OMP THREADPRIVATE(snow_trans)
377	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
378	!$OMP THREADPRIVATE(sneige)
379	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
380	!$OMP THREADPRIVATE(maxmass_snow)
381
382	!! Heat capacity
383	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
384	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
385	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
386
387	!! Thermal conductivities
388	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
389	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
390	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
391
392	!! Time constant of long-term soil humidity (s)
393	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
394
395	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
396	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
397	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
398	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
399	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
400	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
401	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
402	REAL(r_std), PARAMETER :: thick_min_snow = .01
403
404	!! The maximum snow density and water holding characterisicts
405	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
406	!$OMP THREADPRIVATE(xrhosmax)
407	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
408	!$OMP THREADPRIVATE(xwsnowholdmax1)
409	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
410	!$OMP THREADPRIVATE(xwsnowholdmax2)
411	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
412	!$OMP THREADPRIVATE(xsnowrhohold)
413	REAL(r_std), SAVE :: xrhosmin = 50.
414	!$OMP THREADPRIVATE(xrhosmin)
415	REAL(r_std), PARAMETER :: xci = 2.106e+3
416	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
417
418	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
419	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
420
421	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
422	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
423
424	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
425	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
426	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
427	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
428
429	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
430
431	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
432	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
433	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
434
435	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
436
437	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
438	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
439	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
440	!$OMP THREADPRIVATE(ZSNOWTHRMCOND1)
441	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
442	!$OMP THREADPRIVATE(ZSNOWTHRMCOND2)
443
444	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
445	! (sig only for new snow OR high altitudes)
446	! from Sun et al. (1999): based on data from Jordan (1991)
447	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
448	!
449	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
450	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_AVAP)
451	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
452	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_BVAP)
453	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
454	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_CVAP)
455
456	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
457	!$OMP THREADPRIVATE(xansmax)
458	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
459	!$OMP THREADPRIVATE(xansmin)
460	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
461	!$OMP THREADPRIVATE(xans_todry)
462	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
463	!$OMP THREADPRIVATE(xans_t)
464
465	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
466	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
467	REAL(r_std), PARAMETER :: XP00 = 1.E5
468
469	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
470	! (sig only for new snow OR high altitudes)
471	! from Sun et al. (1999): based on data from Jordan (1991)
472	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
473	!
474	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
475	!$OMP THREADPRIVATE(ZSNOWCMPCT_RHOD)
476	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s
477	!$OMP THREADPRIVATE(ZSNOWCMPCT_ACM)
478	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
479	!$OMP THREADPRIVATE(ZSNOWCMPCT_BCM)
480	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
481	!$OMP THREADPRIVATE(ZSNOWCMPCT_CCM)
482	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
483	!$OMP THREADPRIVATE(ZSNOWCMPCT_V0)
484	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
485	!$OMP THREADPRIVATE(ZSNOWCMPCT_VT)
486	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
487	!$OMP THREADPRIVATE(ZSNOWCMPCT_VR)
488
489	!
490	! BVOC : Biogenic activity for each age class
491	!
492	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
493	!! age class : isoprene (unitless)
494	!$OMP THREADPRIVATE(iso_activity)
495	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
496	!! age class : methanol (unnitless)
497	!$OMP THREADPRIVATE(methanol_activity)
498
499	!
500	! condveg.f90
501	!
502
503	! 1. Scalar
504
505	! 1.1 Flags used inside the module
506
507	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
508	!! albedo (see header of subroutine)
509	!! (true/false)
510	!$OMP THREADPRIVATE(alb_bare_model)
511	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
512	!! albedo read from file
513	!! (true/false)
514	!$OMP THREADPRIVATE(alb_bg_modis)
515	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
516	!! (see header of subroutine).
517	!! (true/false)
518	!$OMP THREADPRIVATE(impaze)
519	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
520	!! the roughness height : static or dynamic (varying with LAI)
521	!! (true/false)
522	!$OMP THREADPRIVATE(rough_dyn)
523
524	LOGICAL, SAVE :: new_watstress = .FALSE.
525	!$OMP THREADPRIVATE(new_watstress)
526
527	REAL(r_std), SAVE :: alpha_watstress = 1.
528	!$OMP THREADPRIVATE(alpha_watstress)
529
530	! 1.2 Others
531
532
533	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
534	!! height from vegetation height (m)
535	!$OMP THREADPRIVATE(height_displacement)
536	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
537	!$OMP THREADPRIVATE(z0_bare)
538	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
539	!$OMP THREADPRIVATE(z0_ice)
540	REAL(r_std), SAVE :: tcst_snowa = 10.0 !! Time constant of the albedo decay of snow (days), increased from the value 5.0 (04/07/2016)
541	!$OMP THREADPRIVATE(tcst_snowa)
542	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
543	!$OMP THREADPRIVATE(snowcri_alb)
544	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
545	!$OMP THREADPRIVATE(fixed_snow_albedo)
546	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
547	!$OMP THREADPRIVATE(z0_scal)
548	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
549	!! displacement height (m) (imposed)
550	!$OMP THREADPRIVATE(roughheight_scal)
551	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
552	!$OMP THREADPRIVATE(emis_scal)
553
554	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
555	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
556	!! see Ershadi et al. (2015) for more info
557	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
558	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
559	!! see Ershadi et al. (2015) for more info
560	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
561	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
562	!! see Ershadi et al. (2015) for more info
563	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
564	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
565	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
566	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
567	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
568	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
569
570
571
572	! 2. Arrays
573
574	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
575	!$OMP THREADPRIVATE(alb_deadleaf)
576	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
577	!$OMP THREADPRIVATE(alb_ice)
578	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
579	!! used imposed (unitless)
580	!$OMP THREADPRIVATE(albedo_scal)
581	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
582	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
583	!! dry soil albedo values in visible range
584	!$OMP THREADPRIVATE(vis_dry)
585	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
586	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
587	!! dry soil albedo values in near-infrared range
588	!$OMP THREADPRIVATE(nir_dry)
589	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
590	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
591	!! wet soil albedo values in visible range
592	!$OMP THREADPRIVATE(vis_wet)
593	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
594	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
595	!! wet soil albedo values in near-infrared range
596	!$OMP THREADPRIVATE(nir_wet)
597	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
598	&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:
599	!! Averaged of wet and dry soil albedo values
600	!! in visible and near-infrared range
601	!$OMP THREADPRIVATE(albsoil_vis)
602	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
603	&0.36, 0.34, 0.34, 0.33, 0.30, 0.25, 0.20, 0.15, 0.45/) !! Soil albedo values to soil colour classification:
604	!! Averaged of wet and dry soil albedo values
605	!! in visible and near-infrared range
606	!$OMP THREADPRIVATE(albsoil_nir)
607
608	!
609	! diffuco.f90
610	!
611
612	! 0. Constants
613
614	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
615	!! of dry air (unitless)
616	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
617	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
618	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
619	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
620	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
621
622	! 1. Scalar
623
624	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
625	!$OMP THREADPRIVATE(nlai)
626	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
627	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
628	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
629	!$OMP THREADPRIVATE(laimax)
630	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation version used for CMIP6 6.1.0-6.1.10
631	!$OMP THREADPRIVATE(downregulation_co2)
632	LOGICAL, SAVE :: downregulation_co2_new = .FALSE. !! Set to .TRUE. if you want CO2 downregulation version revised for CMIP6 6.1.11
633	!$OMP THREADPRIVATE(downregulation_co2_new)
634	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
635	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
636	REAL(r_std), SAVE :: downregulation_co2_minimum = 280. !! CO2 value above which downregulation is taken into account
637	!$OMP THREADPRIVATE(downregulation_co2_minimum)
638
639	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
640	!$OMP THREADPRIVATE(gb_ref)
641
642	! 3. Coefficients of equations
643
644	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
645	!$OMP THREADPRIVATE(lai_level_depth)
646	!
647	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
648	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
649	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
650	!
651	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
652	!$OMP THREADPRIVATE(Oi)
653	!
654	! slowproc.f90
655	!
656
657	! 1. Scalar
658
659	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
660	!$OMP THREADPRIVATE(veget_year_orig)
661
662	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
663	!$OMP THREADPRIVATE(min_vegfrac)
664	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
665	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
666
667	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
668	!$OMP THREADPRIVATE(stempdiag_bid)
669
670
671	!-----------------------------!
672	! STOMATE AND LPJ PARAMETERS !
673	!-----------------------------!
674
675
676	!
677	! lpj_constraints.f90
678	!
679
680	! 1. Scalar
681
682	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
683	!! regeneration (vernalization) (years)
684	!$OMP THREADPRIVATE(too_long)
685
686
687	!
688	! lpj_establish.f90
689	!
690
691	! 1. Scalar
692
693	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
694	!$OMP THREADPRIVATE(estab_max_tree)
695	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
696	!$OMP THREADPRIVATE(estab_max_grass)
697
698	! 3. Coefficients of equations
699
700	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
701	!$OMP THREADPRIVATE(establish_scal_fact)
702	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
703	!$OMP THREADPRIVATE(max_tree_coverage)
704	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
705	!$OMP THREADPRIVATE(ind_0_estab)
706
707
708	!
709	! lpj_fire.f90
710	!
711
712	! 1. Scalar
713
714	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
715	!$OMP THREADPRIVATE(tau_fire)
716	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
717	!! below which iginitions extinguish
718	!! @tex $(gC m^{-2})$ @endtex
719	!$OMP THREADPRIVATE(litter_crit)
720	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
721	!$OMP THREADPRIVATE(fire_resist_struct)
722	! 2. Arrays
723
724	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
725	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
726	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
727
728	! 3. Coefficients of equations
729
730	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
731	!$OMP THREADPRIVATE(bcfrac_coeff)
732	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
733	!$OMP THREADPRIVATE(firefrac_coeff)
734
735	!
736	! lpj_gap.f90
737	!
738
739	! 1. Scalar
740
741	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
742	!! @tex $(year^{-1})$ @endtex
743	!$OMP THREADPRIVATE(ref_greff)
744
745	!
746	! lpj_light.f90
747	!
748
749	! 1. Scalar
750
751	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
752	!! to fpc of last time step (F)? (true/false)
753	!$OMP THREADPRIVATE(annual_increase)
754	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
755	!! (due to its branches etc.) (0-1, unitless)
756	!! This means that only a small fraction of its crown area
757	!! can be invaded by other trees.
758	!$OMP THREADPRIVATE(min_cover)
759	!
760	! lpj_pftinout.f90
761	!
762
763	! 1. Scalar
764
765	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
766	!$OMP THREADPRIVATE(min_avail)
767	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
768	!$OMP THREADPRIVATE(ind_0)
769	! 3. Coefficients of equations
770
771	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
772	!$OMP THREADPRIVATE(RIP_time_min)
773	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
774	!$OMP THREADPRIVATE(npp_longterm_init)
775	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
776	!$OMP THREADPRIVATE(everywhere_init)
777
778
779	!
780	! stomate_alloc.f90
781	!
782
783	! 0. Constants
784
785	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
786	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
787
788	! 1. Scalar
789
790	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
791	!! we are severely stressed? (true/false)
792	!$OMP THREADPRIVATE(ok_minres)
793	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
794	!! carbohydrate reserve may be used for
795	!! trees (days)
796	!$OMP THREADPRIVATE(reserve_time_tree)
797	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
798	!! carbohydrate reserve may be used for
799	!! grasses (days)
800	!$OMP THREADPRIVATE(reserve_time_grass)
801
802	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
803	!$OMP THREADPRIVATE(f_fruit)
804	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
805	!! for grass (0-1, unitless)
806	!$OMP THREADPRIVATE(alloc_sap_above_grass)
807	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
808	!! allocation (0-1, unitless)
809	!$OMP THREADPRIVATE(min_LtoLSR)
810	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
811	!! allocation (0-1, unitless)
812	!$OMP THREADPRIVATE(max_LtoLSR)
813	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
814	!$OMP THREADPRIVATE(z_nitrogen)
815
816	! 3. Coefficients of equations
817
818	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
819	!$OMP THREADPRIVATE(Nlim_tref)
820
821
822	!
823	! stomate_data.f90
824	!
825
826	! 1. Scalar
827
828	! 1.1 Parameters for the pipe model
829
830	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
831	!$OMP THREADPRIVATE(pipe_tune1)
832	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
833	!$OMP THREADPRIVATE(pipe_tune2)
834	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
835	!$OMP THREADPRIVATE(pipe_tune3)
836	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
837	!$OMP THREADPRIVATE(pipe_tune4)
838	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
839	!$OMP THREADPRIVATE(pipe_density)
840	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
841	!$OMP THREADPRIVATE(pipe_k1)
842	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
843	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
844
845	! 1.2 climatic parameters
846
847	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
848	!$OMP THREADPRIVATE(precip_crit)
849	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
850	!$OMP THREADPRIVATE(gdd_crit_estab)
851	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
852	!$OMP THREADPRIVATE(fpc_crit)
853
854	! 1.3 sapling characteristics
855
856	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
857	!$OMP THREADPRIVATE(alpha_grass)
858	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
859	!$OMP THREADPRIVATE(alpha_tree)
860	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
861	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
862
863	! 1.4 time scales for phenology and other processes (in days)
864
865	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
866	!$OMP THREADPRIVATE(tau_hum_month)
867	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
868	!$OMP THREADPRIVATE(tau_hum_week)
869	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
870	!$OMP THREADPRIVATE(tau_t2m_month)
871	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
872	!$OMP THREADPRIVATE(tau_t2m_week)
873	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
874	!$OMP THREADPRIVATE(tau_tsoil_month)
875	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
876	!$OMP THREADPRIVATE(tau_soilhum_month)
877	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
878	!$OMP THREADPRIVATE(tau_gpp_week)
879	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
880	!$OMP THREADPRIVATE(tau_gdd)
881	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
882	!$OMP THREADPRIVATE(tau_ngd)
883	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
884	!$OMP THREADPRIVATE(coeff_tau_longterm)
885	REAL(r_std), SAVE :: tau_longterm_max !! (days)
886	!$OMP THREADPRIVATE(tau_longterm_max)
887
888	! 3. Coefficients of equations
889
890	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
891	!$OMP THREADPRIVATE(bm_sapl_carbres)
892	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
893	!$OMP THREADPRIVATE(bm_sapl_sapabove)
894	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
895	!$OMP THREADPRIVATE(bm_sapl_heartabove)
896	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
897	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
898	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
899	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
900	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
901	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
902	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
903	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
904	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
905	!$OMP THREADPRIVATE(init_sapl_mass_root)
906	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
907	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
908	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
909	!$OMP THREADPRIVATE(cn_sapl_init)
910	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
911	!$OMP THREADPRIVATE(migrate_tree)
912	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
913	!$OMP THREADPRIVATE(migrate_grass)
914	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
915	!$OMP THREADPRIVATE(lai_initmin_tree)
916	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
917	!$OMP THREADPRIVATE(lai_initmin_grass)
918	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
919	!$OMP THREADPRIVATE(dia_coeff)
920	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
921	!$OMP THREADPRIVATE(maxdia_coeff)
922	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
923	!$OMP THREADPRIVATE(bm_sapl_leaf)
924
925
926
927	!
928	! stomate_litter.f90
929	!
930
931	! 0. Constants
932
933	REAL(r_std), PARAMETER :: Q10 = 10. !!
934
935	! 1. Scalar
936
937	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
938	!$OMP THREADPRIVATE(z_decomp)
939
940	! 2. Arrays
941
942	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
943	!$OMP THREADPRIVATE(frac_soil_struct_aa)
944	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
945	!$OMP THREADPRIVATE(frac_soil_struct_ab)
946	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
947	!$OMP THREADPRIVATE(frac_soil_struct_sa)
948	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
949	!$OMP THREADPRIVATE(frac_soil_struct_sb)
950	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
951	!$OMP THREADPRIVATE(frac_soil_metab_aa)
952	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
953	!$OMP THREADPRIVATE(frac_soil_metab_ab)
954	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
955	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
956	!$OMP THREADPRIVATE(CN)
957	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
958	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
959	!$OMP THREADPRIVATE(LC)
960
961	! 3. Coefficients of equations
962
963	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
964	!$OMP THREADPRIVATE(metabolic_ref_frac)
965	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
966	!$OMP THREADPRIVATE(metabolic_LN_ratio)
967	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
968	!$OMP THREADPRIVATE(tau_metabolic)
969	REAL(r_std), SAVE :: tau_struct = 0.245 !!
970	!$OMP THREADPRIVATE(tau_struct)
971	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
972	!$OMP THREADPRIVATE(soil_Q10)
973	REAL(r_std), SAVE :: tsoil_ref = 30. !!
974	!$OMP THREADPRIVATE(tsoil_ref)
975	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
976	!$OMP THREADPRIVATE(litter_struct_coef)
977	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
978	!$OMP THREADPRIVATE(moist_coeff)
979	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
980	!$OMP THREADPRIVATE(moistcont_min)
981
982
983	!
984	! stomate_lpj.f90
985	!
986
987	! 1. Scalar
988
989	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
990	!$OMP THREADPRIVATE(frac_turnover_daily)
991
992
993	!
994	! stomate_npp.f90
995	!
996
997	! 1. Scalar
998
999	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
1000	!! for maintenance respiration (0-1, unitless)
1001	!$OMP THREADPRIVATE(tax_max)
1002
1003
1004	!
1005	! stomate_phenology.f90
1006	!
1007
1008	! 1. Scalar
1009
1010	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
1011	!$OMP THREADPRIVATE(min_growthinit_time)
1012	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
1013	!! - for trees (0-1, unitless)
1014	!$OMP THREADPRIVATE(moiavail_always_tree)
1015	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1016	!! - for grass (0-1, unitless)
1017	!$OMP THREADPRIVATE(moiavail_always_grass)
1018	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1019	!$OMP THREADPRIVATE(t_always)
1020	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1021	!$OMP THREADPRIVATE(t_always_add)
1022
1023	! 3. Coefficients of equations
1024
1025	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1026	!$OMP THREADPRIVATE(gddncd_ref)
1027	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1028	!$OMP THREADPRIVATE(gddncd_curve)
1029	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1030	!$OMP THREADPRIVATE(gddncd_offset)
1031
1032
1033	!
1034	! stomate_prescribe.f90
1035	!
1036
1037	! 3. Coefficients of equations
1038
1039	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1040	!$OMP THREADPRIVATE(bm_sapl_rescale)
1041
1042
1043	!
1044	! stomate_resp.f90
1045	!
1046
1047	! 3. Coefficients of equations
1048
1049	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1050	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1051	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1052	!$OMP THREADPRIVATE(maint_resp_coeff)
1053
1054
1055	!
1056	! stomate_soilcarbon.f90
1057	!
1058
1059	! 2. Arrays
1060
1061	! 2.1 frac_carb_coefficients
1062
1063	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1064	!! corresponding to frac_carb(:,iactive,ipassive)
1065	!$OMP THREADPRIVATE(frac_carb_ap)
1066	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1067	!! corresponding to frac_carb(:,islow,iactive)
1068	!$OMP THREADPRIVATE(frac_carb_sa)
1069	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1070	!! corresponding to frac_carb(:,islow,ipassive)
1071	!$OMP THREADPRIVATE(frac_carb_sp)
1072	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1073	!! corresponding to frac_carb(:,ipassive,iactive)
1074	!$OMP THREADPRIVATE(frac_carb_pa)
1075	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1076	!! corresponding to frac_carb(:,ipassive,islow)
1077	!$OMP THREADPRIVATE(frac_carb_ps)
1078
1079	! 3. Coefficients of equations
1080
1081	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1082	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1083	!! residence times in carbon pools (days)
1084	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1085	!$OMP THREADPRIVATE(carbon_tau_iactive)
1086	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1087	!$OMP THREADPRIVATE(carbon_tau_islow)
1088	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1089	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1090	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1091	!$OMP THREADPRIVATE(flux_tot_coeff)
1092
1093	!
1094	! stomate_turnover.f90
1095	!
1096
1097	! 3. Coefficients of equations
1098
1099	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1100	!$OMP THREADPRIVATE(new_turnover_time_ref)
1101	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1102	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1103	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1104	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1105
1106
1107	!
1108	! stomate_vmax.f90
1109	!
1110
1111	! 1. Scalar
1112
1113	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1114	!$OMP THREADPRIVATE(vmax_offset)
1115	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1116	!! reaches 1 (unitless)
1117	!$OMP THREADPRIVATE(leafage_firstmax)
1118	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1119	!! falls below 1 (unitless)
1120	!$OMP THREADPRIVATE(leafage_lastmax)
1121	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1122	!! reaches its minimum (vmax_offset)
1123	!! (unitless)
1124	!$OMP THREADPRIVATE(leafage_old)
1125	!
1126	! stomate_season.f90
1127	!
1128
1129	! 1. Scalar
1130
1131	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1132	!$OMP THREADPRIVATE(gppfrac_dormance)
1133	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1134	!$OMP THREADPRIVATE(tau_climatology)
1135	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1136	!$OMP THREADPRIVATE(hvc1)
1137	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1138	!$OMP THREADPRIVATE(hvc2)
1139	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1140	!$OMP THREADPRIVATE(leaf_frac_hvc)
1141	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1142	!$OMP THREADPRIVATE(tlong_ref_max)
1143	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1144	!$OMP THREADPRIVATE(tlong_ref_min)
1145
1146	! 3. Coefficients of equations
1147
1148	REAL(r_std), SAVE :: ncd_max_year = 3.
1149	!$OMP THREADPRIVATE(ncd_max_year)
1150	REAL(r_std), SAVE :: gdd_threshold = 5.
1151	!$OMP THREADPRIVATE(gdd_threshold)
1152	REAL(r_std), SAVE :: green_age_ever = 2.
1153	!$OMP THREADPRIVATE(green_age_ever)
1154	REAL(r_std), SAVE :: green_age_dec = 0.5
1155	!$OMP THREADPRIVATE(green_age_dec)
1156
1157	END MODULE constantes_var

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