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source: branches/ORCHIDEE_2_2/ORCHIDEE/src_parameters/constantes_var.f90 @ 7199

Last change on this file since 7199 was 7199, checked in by agnes.ducharne, 3 years ago
Inclusion of r6499, r6505, r6508 of the trunk, for consistent soil parameters in hydrola and thermosoil, as detailed in ticket #604. Checked step by step by 5d simulations on jean-zay: the only changes are weak and due to replacing poros=0.41 by variable mcs.
Property svn:keywords set to `Date Revision`
File size: 57.5 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	!$OMP THREADPRIVATE(impsoilt)
354	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
355	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
356	LOGICAL, SAVE :: do_now_stomate_woodharvest = .FALSE. !! Time to call woodharvest in stomate_lpj
357	!$OMP THREADPRIVATE(do_now_stomate_woodharvest)
358	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
359	!$OMP THREADPRIVATE(done_stomate_lcchange)
360	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
361	!$OMP THREADPRIVATE(read_lai)
362	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
363	!$OMP THREADPRIVATE(veget_reinit)
364	LOGICAL, SAVE :: vegetmap_reset = .FALSE.!! Reset the vegetation map and reset carbon related variables
365	!$OMP THREADPRIVATE(vegetmap_reset)
366	INTEGER(i_std) , SAVE :: veget_update !! Update frequency in years for landuse (nb of years)
367	!$OMP THREADPRIVATE(veget_update)
368	!
369	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
370	!
371	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
372	!$OMP THREADPRIVATE(max_snow_age)
373	REAL(r_std), SAVE :: snow_trans = 0.2_r_std !! Transformation time constant for snow (m), reduced from the value 0.3 (04/07/2016)
374	!$OMP THREADPRIVATE(snow_trans)
375	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
376	!$OMP THREADPRIVATE(sneige)
377	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
378	!$OMP THREADPRIVATE(maxmass_snow)
379
380	!! Heat capacity
381	REAL(r_std), PARAMETER :: capa_ice = 2.228*1.E3 !! Heat capacity of ice (J/kg/K)
382	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
383	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
384	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
385
386	!! Thermal conductivities
387	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
388	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
389	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
390
391	!! Time constant of long-term soil humidity (s)
392	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
393
394	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
395	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
396	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
397	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
398	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
399	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
400	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
401	REAL(r_std), PARAMETER :: thick_min_snow = .01
402
403	!! The maximum snow density and water holding characterisicts
404	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
405	!$OMP THREADPRIVATE(xrhosmax)
406	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
407	!$OMP THREADPRIVATE(xwsnowholdmax1)
408	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
409	!$OMP THREADPRIVATE(xwsnowholdmax2)
410	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
411	!$OMP THREADPRIVATE(xsnowrhohold)
412	REAL(r_std), SAVE :: xrhosmin = 50.
413	!$OMP THREADPRIVATE(xrhosmin)
414	REAL(r_std), PARAMETER :: xci = 2.106e+3
415	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
416
417	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
418	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
419
420	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
421	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
422
423	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
424	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
425	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
426	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
427
428	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
429
430	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
431	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
432	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
433
434	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
435
436	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
437	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
438	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
439	!$OMP THREADPRIVATE(ZSNOWTHRMCOND1)
440	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
441	!$OMP THREADPRIVATE(ZSNOWTHRMCOND2)
442
443	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
444	! (sig only for new snow OR high altitudes)
445	! from Sun et al. (1999): based on data from Jordan (1991)
446	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
447	!
448	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
449	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_AVAP)
450	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
451	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_BVAP)
452	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
453	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_CVAP)
454
455	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
456	!$OMP THREADPRIVATE(xansmax)
457	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
458	!$OMP THREADPRIVATE(xansmin)
459	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
460	!$OMP THREADPRIVATE(xans_todry)
461	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
462	!$OMP THREADPRIVATE(xans_t)
463
464	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
465	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
466	REAL(r_std), PARAMETER :: XP00 = 1.E5
467
468	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
469	! (sig only for new snow OR high altitudes)
470	! from Sun et al. (1999): based on data from Jordan (1991)
471	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
472	!
473	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
474	!$OMP THREADPRIVATE(ZSNOWCMPCT_RHOD)
475	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s
476	!$OMP THREADPRIVATE(ZSNOWCMPCT_ACM)
477	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
478	!$OMP THREADPRIVATE(ZSNOWCMPCT_BCM)
479	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
480	!$OMP THREADPRIVATE(ZSNOWCMPCT_CCM)
481	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
482	!$OMP THREADPRIVATE(ZSNOWCMPCT_V0)
483	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
484	!$OMP THREADPRIVATE(ZSNOWCMPCT_VT)
485	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
486	!$OMP THREADPRIVATE(ZSNOWCMPCT_VR)
487
488	!
489	! BVOC : Biogenic activity for each age class
490	!
491	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
492	!! age class : isoprene (unitless)
493	!$OMP THREADPRIVATE(iso_activity)
494	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
495	!! age class : methanol (unnitless)
496	!$OMP THREADPRIVATE(methanol_activity)
497
498	!
499	! condveg.f90
500	!
501
502	! 1. Scalar
503
504	! 1.1 Flags used inside the module
505
506	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
507	!! albedo (see header of subroutine)
508	!! (true/false)
509	!$OMP THREADPRIVATE(alb_bare_model)
510	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
511	!! albedo read from file
512	!! (true/false)
513	!$OMP THREADPRIVATE(alb_bg_modis)
514	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
515	!! (see header of subroutine).
516	!! (true/false)
517	!$OMP THREADPRIVATE(impaze)
518	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
519	!! the roughness height : static or dynamic (varying with LAI)
520	!! (true/false)
521	!$OMP THREADPRIVATE(rough_dyn)
522
523	LOGICAL, SAVE :: new_watstress = .FALSE.
524	!$OMP THREADPRIVATE(new_watstress)
525
526	REAL(r_std), SAVE :: alpha_watstress = 1.
527	!$OMP THREADPRIVATE(alpha_watstress)
528
529	! 1.2 Others
530
531
532	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
533	!! height from vegetation height (m)
534	!$OMP THREADPRIVATE(height_displacement)
535	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
536	!$OMP THREADPRIVATE(z0_bare)
537	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
538	!$OMP THREADPRIVATE(z0_ice)
539	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)
540	!$OMP THREADPRIVATE(tcst_snowa)
541	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
542	!$OMP THREADPRIVATE(snowcri_alb)
543	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
544	!$OMP THREADPRIVATE(fixed_snow_albedo)
545	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
546	!$OMP THREADPRIVATE(z0_scal)
547	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
548	!! displacement height (m) (imposed)
549	!$OMP THREADPRIVATE(roughheight_scal)
550	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
551	!$OMP THREADPRIVATE(emis_scal)
552
553	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
554	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
555	!! see Ershadi et al. (2015) for more info
556	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
557	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
558	!! see Ershadi et al. (2015) for more info
559	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
560	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
561	!! see Ershadi et al. (2015) for more info
562	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
563	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
564	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
565	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
566	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
567	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
568
569
570
571	! 2. Arrays
572
573	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
574	!$OMP THREADPRIVATE(alb_deadleaf)
575	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
576	!$OMP THREADPRIVATE(alb_ice)
577	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
578	!! used imposed (unitless)
579	!$OMP THREADPRIVATE(albedo_scal)
580	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
581	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
582	!! dry soil albedo values in visible range
583	!$OMP THREADPRIVATE(vis_dry)
584	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
585	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
586	!! dry soil albedo values in near-infrared range
587	!$OMP THREADPRIVATE(nir_dry)
588	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
589	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
590	!! wet soil albedo values in visible range
591	!$OMP THREADPRIVATE(vis_wet)
592	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
593	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
594	!! wet soil albedo values in near-infrared range
595	!$OMP THREADPRIVATE(nir_wet)
596	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
597	&0.18, 0.16, 0.16, 0.15, 0.12, 0.105, 0.09, 0.075, 0.25/) !! Soil albedo values to soil colour classification:
598	!! Averaged of wet and dry soil albedo values
599	!! in visible and near-infrared range
600	!$OMP THREADPRIVATE(albsoil_vis)
601	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
602	&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:
603	!! Averaged of wet and dry soil albedo values
604	!! in visible and near-infrared range
605	!$OMP THREADPRIVATE(albsoil_nir)
606
607	!
608	! diffuco.f90
609	!
610
611	! 0. Constants
612
613	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
614	!! of dry air (unitless)
615	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
616	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
617	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
618	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
619	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
620
621	! 1. Scalar
622
623	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
624	!$OMP THREADPRIVATE(nlai)
625	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
626	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
627	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
628	!$OMP THREADPRIVATE(laimax)
629	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation version used for CMIP6 6.1.0-6.1.10
630	!$OMP THREADPRIVATE(downregulation_co2)
631	LOGICAL, SAVE :: downregulation_co2_new = .FALSE. !! Set to .TRUE. if you want CO2 downregulation version revised for CMIP6 6.1.11
632	!$OMP THREADPRIVATE(downregulation_co2_new)
633	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
634	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
635	REAL(r_std), SAVE :: downregulation_co2_minimum = 280. !! CO2 value above which downregulation is taken into account
636	!$OMP THREADPRIVATE(downregulation_co2_minimum)
637
638	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
639	!$OMP THREADPRIVATE(gb_ref)
640
641	! 3. Coefficients of equations
642
643	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
644	!$OMP THREADPRIVATE(lai_level_depth)
645	!
646	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
647	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
648	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
649	!
650	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
651	!$OMP THREADPRIVATE(Oi)
652	!
653	! slowproc.f90
654	!
655
656	! 1. Scalar
657
658	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
659	!$OMP THREADPRIVATE(veget_year_orig)
660	! The default value for clay fraction is an heritage, with no documentation nor justification.
661	REAL(r_std), SAVE :: clayfraction_default = 0.2 !! Default value for clay fraction (0-1, unitless)
662	!$OMP THREADPRIVATE(clayfraction_default)
663	! We need to output sand and silt fractiosn for SP-MIP, and the following default values, corresponding to a Loamy soil, are selected.
664	REAL(r_std), SAVE :: sandfraction_default = 0.4 !! Default value for sand fraction (0-1, unitless)
665	!$OMP THREADPRIVATE(sandfraction_default)
666	REAL(r_std), SAVE :: siltfraction_default = 0.4 !! Default value for silt fraction (0-1, unitless)
667	!$OMP THREADPRIVATE(siltfraction_default)
668	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
669	!$OMP THREADPRIVATE(min_vegfrac)
670	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
671	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
672
673	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
674	!$OMP THREADPRIVATE(stempdiag_bid)
675
676
677	!-----------------------------!
678	! STOMATE AND LPJ PARAMETERS !
679	!-----------------------------!
680
681
682	!
683	! lpj_constraints.f90
684	!
685
686	! 1. Scalar
687
688	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
689	!! regeneration (vernalization) (years)
690	!$OMP THREADPRIVATE(too_long)
691
692
693	!
694	! lpj_establish.f90
695	!
696
697	! 1. Scalar
698
699	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
700	!$OMP THREADPRIVATE(estab_max_tree)
701	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
702	!$OMP THREADPRIVATE(estab_max_grass)
703
704	! 3. Coefficients of equations
705
706	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
707	!$OMP THREADPRIVATE(establish_scal_fact)
708	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
709	!$OMP THREADPRIVATE(max_tree_coverage)
710	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
711	!$OMP THREADPRIVATE(ind_0_estab)
712
713
714	!
715	! lpj_fire.f90
716	!
717
718	! 1. Scalar
719
720	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
721	!$OMP THREADPRIVATE(tau_fire)
722	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
723	!! below which iginitions extinguish
724	!! @tex $(gC m^{-2})$ @endtex
725	!$OMP THREADPRIVATE(litter_crit)
726	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
727	!$OMP THREADPRIVATE(fire_resist_struct)
728	! 2. Arrays
729
730	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
731	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
732	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
733
734	! 3. Coefficients of equations
735
736	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
737	!$OMP THREADPRIVATE(bcfrac_coeff)
738	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
739	!$OMP THREADPRIVATE(firefrac_coeff)
740
741	!
742	! lpj_gap.f90
743	!
744
745	! 1. Scalar
746
747	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
748	!! @tex $(year^{-1})$ @endtex
749	!$OMP THREADPRIVATE(ref_greff)
750
751	!
752	! lpj_light.f90
753	!
754
755	! 1. Scalar
756
757	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
758	!! to fpc of last time step (F)? (true/false)
759	!$OMP THREADPRIVATE(annual_increase)
760	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
761	!! (due to its branches etc.) (0-1, unitless)
762	!! This means that only a small fraction of its crown area
763	!! can be invaded by other trees.
764	!$OMP THREADPRIVATE(min_cover)
765	!
766	! lpj_pftinout.f90
767	!
768
769	! 1. Scalar
770
771	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
772	!$OMP THREADPRIVATE(min_avail)
773	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
774	!$OMP THREADPRIVATE(ind_0)
775	! 3. Coefficients of equations
776
777	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
778	!$OMP THREADPRIVATE(RIP_time_min)
779	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
780	!$OMP THREADPRIVATE(npp_longterm_init)
781	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
782	!$OMP THREADPRIVATE(everywhere_init)
783
784
785	!
786	! stomate_alloc.f90
787	!
788
789	! 0. Constants
790
791	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
792	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
793
794	! 1. Scalar
795
796	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
797	!! we are severely stressed? (true/false)
798	!$OMP THREADPRIVATE(ok_minres)
799	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
800	!! carbohydrate reserve may be used for
801	!! trees (days)
802	!$OMP THREADPRIVATE(reserve_time_tree)
803	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
804	!! carbohydrate reserve may be used for
805	!! grasses (days)
806	!$OMP THREADPRIVATE(reserve_time_grass)
807
808	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
809	!$OMP THREADPRIVATE(f_fruit)
810	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
811	!! for grass (0-1, unitless)
812	!$OMP THREADPRIVATE(alloc_sap_above_grass)
813	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
814	!! allocation (0-1, unitless)
815	!$OMP THREADPRIVATE(min_LtoLSR)
816	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
817	!! allocation (0-1, unitless)
818	!$OMP THREADPRIVATE(max_LtoLSR)
819	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
820	!$OMP THREADPRIVATE(z_nitrogen)
821
822	! 3. Coefficients of equations
823
824	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
825	!$OMP THREADPRIVATE(Nlim_tref)
826
827
828	!
829	! stomate_data.f90
830	!
831
832	! 1. Scalar
833
834	! 1.1 Parameters for the pipe model
835
836	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
837	!$OMP THREADPRIVATE(pipe_tune1)
838	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
839	!$OMP THREADPRIVATE(pipe_tune2)
840	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
841	!$OMP THREADPRIVATE(pipe_tune3)
842	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
843	!$OMP THREADPRIVATE(pipe_tune4)
844	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
845	!$OMP THREADPRIVATE(pipe_density)
846	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
847	!$OMP THREADPRIVATE(pipe_k1)
848	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
849	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
850
851	! 1.2 climatic parameters
852
853	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
854	!$OMP THREADPRIVATE(precip_crit)
855	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
856	!$OMP THREADPRIVATE(gdd_crit_estab)
857	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
858	!$OMP THREADPRIVATE(fpc_crit)
859
860	! 1.3 sapling characteristics
861
862	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
863	!$OMP THREADPRIVATE(alpha_grass)
864	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
865	!$OMP THREADPRIVATE(alpha_tree)
866	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
867	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
868
869	! 1.4 time scales for phenology and other processes (in days)
870
871	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
872	!$OMP THREADPRIVATE(tau_hum_month)
873	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
874	!$OMP THREADPRIVATE(tau_hum_week)
875	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
876	!$OMP THREADPRIVATE(tau_t2m_month)
877	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
878	!$OMP THREADPRIVATE(tau_t2m_week)
879	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
880	!$OMP THREADPRIVATE(tau_tsoil_month)
881	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
882	!$OMP THREADPRIVATE(tau_soilhum_month)
883	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
884	!$OMP THREADPRIVATE(tau_gpp_week)
885	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
886	!$OMP THREADPRIVATE(tau_gdd)
887	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
888	!$OMP THREADPRIVATE(tau_ngd)
889	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
890	!$OMP THREADPRIVATE(coeff_tau_longterm)
891	REAL(r_std), SAVE :: tau_longterm_max !! (days)
892	!$OMP THREADPRIVATE(tau_longterm_max)
893
894	! 3. Coefficients of equations
895
896	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
897	!$OMP THREADPRIVATE(bm_sapl_carbres)
898	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
899	!$OMP THREADPRIVATE(bm_sapl_sapabove)
900	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
901	!$OMP THREADPRIVATE(bm_sapl_heartabove)
902	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
903	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
904	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
905	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
906	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
907	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
908	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
909	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
910	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
911	!$OMP THREADPRIVATE(init_sapl_mass_root)
912	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
913	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
914	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
915	!$OMP THREADPRIVATE(cn_sapl_init)
916	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
917	!$OMP THREADPRIVATE(migrate_tree)
918	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
919	!$OMP THREADPRIVATE(migrate_grass)
920	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
921	!$OMP THREADPRIVATE(lai_initmin_tree)
922	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
923	!$OMP THREADPRIVATE(lai_initmin_grass)
924	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
925	!$OMP THREADPRIVATE(dia_coeff)
926	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
927	!$OMP THREADPRIVATE(maxdia_coeff)
928	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
929	!$OMP THREADPRIVATE(bm_sapl_leaf)
930
931
932
933	!
934	! stomate_litter.f90
935	!
936
937	! 0. Constants
938
939	REAL(r_std), PARAMETER :: Q10 = 10. !!
940
941	! 1. Scalar
942
943	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
944	!$OMP THREADPRIVATE(z_decomp)
945
946	! 2. Arrays
947
948	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
949	!$OMP THREADPRIVATE(frac_soil_struct_aa)
950	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
951	!$OMP THREADPRIVATE(frac_soil_struct_ab)
952	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
953	!$OMP THREADPRIVATE(frac_soil_struct_sa)
954	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
955	!$OMP THREADPRIVATE(frac_soil_struct_sb)
956	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
957	!$OMP THREADPRIVATE(frac_soil_metab_aa)
958	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
959	!$OMP THREADPRIVATE(frac_soil_metab_ab)
960	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
961	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
962	!$OMP THREADPRIVATE(CN)
963	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
964	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
965	!$OMP THREADPRIVATE(LC)
966
967	! 3. Coefficients of equations
968
969	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
970	!$OMP THREADPRIVATE(metabolic_ref_frac)
971	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
972	!$OMP THREADPRIVATE(metabolic_LN_ratio)
973	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
974	!$OMP THREADPRIVATE(tau_metabolic)
975	REAL(r_std), SAVE :: tau_struct = 0.245 !!
976	!$OMP THREADPRIVATE(tau_struct)
977	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
978	!$OMP THREADPRIVATE(soil_Q10)
979	REAL(r_std), SAVE :: tsoil_ref = 30. !!
980	!$OMP THREADPRIVATE(tsoil_ref)
981	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
982	!$OMP THREADPRIVATE(litter_struct_coef)
983	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
984	!$OMP THREADPRIVATE(moist_coeff)
985	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
986	!$OMP THREADPRIVATE(moistcont_min)
987
988
989	!
990	! stomate_lpj.f90
991	!
992
993	! 1. Scalar
994
995	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
996	!$OMP THREADPRIVATE(frac_turnover_daily)
997
998
999	!
1000	! stomate_npp.f90
1001	!
1002
1003	! 1. Scalar
1004
1005	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
1006	!! for maintenance respiration (0-1, unitless)
1007	!$OMP THREADPRIVATE(tax_max)
1008
1009
1010	!
1011	! stomate_phenology.f90
1012	!
1013
1014	! 1. Scalar
1015
1016	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
1017	!$OMP THREADPRIVATE(min_growthinit_time)
1018	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
1019	!! - for trees (0-1, unitless)
1020	!$OMP THREADPRIVATE(moiavail_always_tree)
1021	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1022	!! - for grass (0-1, unitless)
1023	!$OMP THREADPRIVATE(moiavail_always_grass)
1024	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1025	!$OMP THREADPRIVATE(t_always)
1026	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1027	!$OMP THREADPRIVATE(t_always_add)
1028
1029	! 3. Coefficients of equations
1030
1031	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1032	!$OMP THREADPRIVATE(gddncd_ref)
1033	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1034	!$OMP THREADPRIVATE(gddncd_curve)
1035	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1036	!$OMP THREADPRIVATE(gddncd_offset)
1037
1038
1039	!
1040	! stomate_prescribe.f90
1041	!
1042
1043	! 3. Coefficients of equations
1044
1045	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1046	!$OMP THREADPRIVATE(bm_sapl_rescale)
1047
1048
1049	!
1050	! stomate_resp.f90
1051	!
1052
1053	! 3. Coefficients of equations
1054
1055	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1056	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1057	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1058	!$OMP THREADPRIVATE(maint_resp_coeff)
1059
1060
1061	!
1062	! stomate_soilcarbon.f90
1063	!
1064
1065	! 2. Arrays
1066
1067	! 2.1 frac_carb_coefficients
1068
1069	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1070	!! corresponding to frac_carb(:,iactive,ipassive)
1071	!$OMP THREADPRIVATE(frac_carb_ap)
1072	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1073	!! corresponding to frac_carb(:,islow,iactive)
1074	!$OMP THREADPRIVATE(frac_carb_sa)
1075	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1076	!! corresponding to frac_carb(:,islow,ipassive)
1077	!$OMP THREADPRIVATE(frac_carb_sp)
1078	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1079	!! corresponding to frac_carb(:,ipassive,iactive)
1080	!$OMP THREADPRIVATE(frac_carb_pa)
1081	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1082	!! corresponding to frac_carb(:,ipassive,islow)
1083	!$OMP THREADPRIVATE(frac_carb_ps)
1084
1085	! 3. Coefficients of equations
1086
1087	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1088	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1089	!! residence times in carbon pools (days)
1090	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1091	!$OMP THREADPRIVATE(carbon_tau_iactive)
1092	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1093	!$OMP THREADPRIVATE(carbon_tau_islow)
1094	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1095	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1096	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1097	!$OMP THREADPRIVATE(flux_tot_coeff)
1098
1099	!
1100	! stomate_turnover.f90
1101	!
1102
1103	! 3. Coefficients of equations
1104
1105	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1106	!$OMP THREADPRIVATE(new_turnover_time_ref)
1107	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1108	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1109	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1110	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1111
1112
1113	!
1114	! stomate_vmax.f90
1115	!
1116
1117	! 1. Scalar
1118
1119	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1120	!$OMP THREADPRIVATE(vmax_offset)
1121	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1122	!! reaches 1 (unitless)
1123	!$OMP THREADPRIVATE(leafage_firstmax)
1124	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1125	!! falls below 1 (unitless)
1126	!$OMP THREADPRIVATE(leafage_lastmax)
1127	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1128	!! reaches its minimum (vmax_offset)
1129	!! (unitless)
1130	!$OMP THREADPRIVATE(leafage_old)
1131	!
1132	! stomate_season.f90
1133	!
1134
1135	! 1. Scalar
1136
1137	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1138	!$OMP THREADPRIVATE(gppfrac_dormance)
1139	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1140	!$OMP THREADPRIVATE(tau_climatology)
1141	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1142	!$OMP THREADPRIVATE(hvc1)
1143	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1144	!$OMP THREADPRIVATE(hvc2)
1145	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1146	!$OMP THREADPRIVATE(leaf_frac_hvc)
1147	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1148	!$OMP THREADPRIVATE(tlong_ref_max)
1149	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1150	!$OMP THREADPRIVATE(tlong_ref_min)
1151
1152	! 3. Coefficients of equations
1153
1154	REAL(r_std), SAVE :: ncd_max_year = 3.
1155	!$OMP THREADPRIVATE(ncd_max_year)
1156	REAL(r_std), SAVE :: gdd_threshold = 5.
1157	!$OMP THREADPRIVATE(gdd_threshold)
1158	REAL(r_std), SAVE :: green_age_ever = 2.
1159	!$OMP THREADPRIVATE(green_age_ever)
1160	REAL(r_std), SAVE :: green_age_dec = 0.5
1161	!$OMP THREADPRIVATE(green_age_dec)
1162
1163	END MODULE constantes_var

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