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constantes_var.f90 @ 6393

Last change on this file since 6393 was 6393, checked in by josefine.ghattas, 5 years ago

As done in ORCHIDEE_2_0:
Added new option for downregulation parametrization. Set DOWNREGULATION_CO2_NEW=y in run.def to activate. This option will be availble for configurations IPSLCM66.1.11 and later.

IF both DOWNREGULATION_CO2 and DOWNREGULATION_CO2_NEW are true, then DOWNREGULATION_CO2 will be set to false.

See ticket #641

Property svn:keywords set to Date Revision

File size: 57.6 KB

Line
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), SAVE :: so_capa_ice !! Heat capacity of saturated frozen soil (J/K/m3)
383	!$OMP THREADPRIVATE(so_capa_ice)
384	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
385	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
386	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
387
388	!! Thermal conductivities
389	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
390	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
391	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
392
393	!! Time constant of long-term soil humidity (s)
394	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
395
396	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
397	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
398	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
399	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
400	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
401	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
402	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
403	REAL(r_std), PARAMETER :: thick_min_snow = .01
404
405	!! The maximum snow density and water holding characterisicts
406	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
407	!$OMP THREADPRIVATE(xrhosmax)
408	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
409	!$OMP THREADPRIVATE(xwsnowholdmax1)
410	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
411	!$OMP THREADPRIVATE(xwsnowholdmax2)
412	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
413	!$OMP THREADPRIVATE(xsnowrhohold)
414	REAL(r_std), SAVE :: xrhosmin = 50.
415	!$OMP THREADPRIVATE(xrhosmin)
416	REAL(r_std), PARAMETER :: xci = 2.106e+3
417	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
418
419	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
420	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
421
422	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
423	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
424
425	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
426	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
427	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
428	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
429
430	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
431
432	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
433	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
434	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
435
436	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
437
438	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
439	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
440	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
441	!$OMP THREADPRIVATE(ZSNOWTHRMCOND1)
442	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
443	!$OMP THREADPRIVATE(ZSNOWTHRMCOND2)
444
445	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
446	! (sig only for new snow OR high altitudes)
447	! from Sun et al. (1999): based on data from Jordan (1991)
448	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
449	!
450	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
451	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_AVAP)
452	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
453	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_BVAP)
454	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
455	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_CVAP)
456
457	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
458	!$OMP THREADPRIVATE(xansmax)
459	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
460	!$OMP THREADPRIVATE(xansmin)
461	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
462	!$OMP THREADPRIVATE(xans_todry)
463	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
464	!$OMP THREADPRIVATE(xans_t)
465
466	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
467	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
468	REAL(r_std), PARAMETER :: XP00 = 1.E5
469
470	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
471	! (sig only for new snow OR high altitudes)
472	! from Sun et al. (1999): based on data from Jordan (1991)
473	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
474	!
475	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
476	!$OMP THREADPRIVATE(ZSNOWCMPCT_RHOD)
477	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s
478	!$OMP THREADPRIVATE(ZSNOWCMPCT_ACM)
479	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
480	!$OMP THREADPRIVATE(ZSNOWCMPCT_BCM)
481	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
482	!$OMP THREADPRIVATE(ZSNOWCMPCT_CCM)
483	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
484	!$OMP THREADPRIVATE(ZSNOWCMPCT_V0)
485	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
486	!$OMP THREADPRIVATE(ZSNOWCMPCT_VT)
487	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
488	!$OMP THREADPRIVATE(ZSNOWCMPCT_VR)
489
490	!
491	! BVOC : Biogenic activity for each age class
492	!
493	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
494	!! age class : isoprene (unitless)
495	!$OMP THREADPRIVATE(iso_activity)
496	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
497	!! age class : methanol (unnitless)
498	!$OMP THREADPRIVATE(methanol_activity)
499
500	!
501	! condveg.f90
502	!
503
504	! 1. Scalar
505
506	! 1.1 Flags used inside the module
507
508	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
509	!! albedo (see header of subroutine)
510	!! (true/false)
511	!$OMP THREADPRIVATE(alb_bare_model)
512	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
513	!! albedo read from file
514	!! (true/false)
515	!$OMP THREADPRIVATE(alb_bg_modis)
516	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
517	!! (see header of subroutine).
518	!! (true/false)
519	!$OMP THREADPRIVATE(impaze)
520	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
521	!! the roughness height : static or dynamic (varying with LAI)
522	!! (true/false)
523	!$OMP THREADPRIVATE(rough_dyn)
524
525	LOGICAL, SAVE :: new_watstress = .FALSE.
526	!$OMP THREADPRIVATE(new_watstress)
527
528	REAL(r_std), SAVE :: alpha_watstress = 1.
529	!$OMP THREADPRIVATE(alpha_watstress)
530
531	! 1.2 Others
532
533
534	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
535	!! height from vegetation height (m)
536	!$OMP THREADPRIVATE(height_displacement)
537	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
538	!$OMP THREADPRIVATE(z0_bare)
539	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
540	!$OMP THREADPRIVATE(z0_ice)
541	REAL(r_std), SAVE :: tcst_snowa = 10.0 !! Time constant of the albedo decay of snow (days), increased from the value 5.0 (04/07/2016)
542	!$OMP THREADPRIVATE(tcst_snowa)
543	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
544	!$OMP THREADPRIVATE(snowcri_alb)
545	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
546	!$OMP THREADPRIVATE(fixed_snow_albedo)
547	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
548	!$OMP THREADPRIVATE(z0_scal)
549	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
550	!! displacement height (m) (imposed)
551	!$OMP THREADPRIVATE(roughheight_scal)
552	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
553	!$OMP THREADPRIVATE(emis_scal)
554
555	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
556	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
557	!! see Ershadi et al. (2015) for more info
558	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
559	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
560	!! see Ershadi et al. (2015) for more info
561	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
562	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
563	!! see Ershadi et al. (2015) for more info
564	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
565	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
566	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
567	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
568	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
569	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
570
571
572
573	! 2. Arrays
574
575	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
576	!$OMP THREADPRIVATE(alb_deadleaf)
577	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
578	!$OMP THREADPRIVATE(alb_ice)
579	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
580	!! used imposed (unitless)
581	!$OMP THREADPRIVATE(albedo_scal)
582	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
583	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
584	!! dry soil albedo values in visible range
585	!$OMP THREADPRIVATE(vis_dry)
586	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
587	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
588	!! dry soil albedo values in near-infrared range
589	!$OMP THREADPRIVATE(nir_dry)
590	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
591	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
592	!! wet soil albedo values in visible range
593	!$OMP THREADPRIVATE(vis_wet)
594	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
595	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
596	!! wet soil albedo values in near-infrared range
597	!$OMP THREADPRIVATE(nir_wet)
598	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
599	&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:
600	!! Averaged of wet and dry soil albedo values
601	!! in visible and near-infrared range
602	!$OMP THREADPRIVATE(albsoil_vis)
603	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
604	&0.36, 0.34, 0.34, 0.33, 0.30, 0.25, 0.20, 0.15, 0.45/) !! Soil albedo values to soil colour classification:
605	!! Averaged of wet and dry soil albedo values
606	!! in visible and near-infrared range
607	!$OMP THREADPRIVATE(albsoil_nir)
608
609	!
610	! diffuco.f90
611	!
612
613	! 0. Constants
614
615	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
616	!! of dry air (unitless)
617	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
618	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
619	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
620	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
621	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
622
623	! 1. Scalar
624
625	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
626	!$OMP THREADPRIVATE(nlai)
627	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
628	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
629	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
630	!$OMP THREADPRIVATE(laimax)
631	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation version used for CMIP6 6.1.0-6.1.10
632	!$OMP THREADPRIVATE(downregulation_co2)
633	LOGICAL, SAVE :: downregulation_co2_new = .FALSE. !! Set to .TRUE. if you want CO2 downregulation version revised for CMIP6 6.1.11
634	!$OMP THREADPRIVATE(downregulation_co2_new)
635	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
636	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
637	REAL(r_std), SAVE :: downregulation_co2_minimum = 280. !! CO2 value above which downregulation is taken into account
638	!$OMP THREADPRIVATE(downregulation_co2_minimum)
639
640	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
641	!$OMP THREADPRIVATE(gb_ref)
642
643	! 3. Coefficients of equations
644
645	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
646	!$OMP THREADPRIVATE(lai_level_depth)
647	!
648	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
649	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
650	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
651	!
652	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
653	!$OMP THREADPRIVATE(Oi)
654	!
655	! slowproc.f90
656	!
657
658	! 1. Scalar
659
660	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
661	!$OMP THREADPRIVATE(veget_year_orig)
662	! The default value for clay fraction is an heritage, with no documentation nor justification.
663	REAL(r_std), SAVE :: clayfraction_default = 0.2 !! Default value for clay fraction (0-1, unitless)
664	!$OMP THREADPRIVATE(clayfraction_default)
665	! We need to output sand and silt fractiosn for SP-MIP, and the following default values, corresponding to a Loamy soil, are selected.
666	REAL(r_std), SAVE :: sandfraction_default = 0.4 !! Default value for sand fraction (0-1, unitless)
667	!$OMP THREADPRIVATE(sandfraction_default)
668	REAL(r_std), SAVE :: siltfraction_default = 0.4 !! Default value for silt fraction (0-1, unitless)
669	!$OMP THREADPRIVATE(siltfraction_default)
670	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
671	!$OMP THREADPRIVATE(min_vegfrac)
672	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
673	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
674
675	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
676	!$OMP THREADPRIVATE(stempdiag_bid)
677
678
679	!-----------------------------!
680	! STOMATE AND LPJ PARAMETERS !
681	!-----------------------------!
682
683
684	!
685	! lpj_constraints.f90
686	!
687
688	! 1. Scalar
689
690	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
691	!! regeneration (vernalization) (years)
692	!$OMP THREADPRIVATE(too_long)
693
694
695	!
696	! lpj_establish.f90
697	!
698
699	! 1. Scalar
700
701	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
702	!$OMP THREADPRIVATE(estab_max_tree)
703	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
704	!$OMP THREADPRIVATE(estab_max_grass)
705
706	! 3. Coefficients of equations
707
708	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
709	!$OMP THREADPRIVATE(establish_scal_fact)
710	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
711	!$OMP THREADPRIVATE(max_tree_coverage)
712	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
713	!$OMP THREADPRIVATE(ind_0_estab)
714
715
716	!
717	! lpj_fire.f90
718	!
719
720	! 1. Scalar
721
722	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
723	!$OMP THREADPRIVATE(tau_fire)
724	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
725	!! below which iginitions extinguish
726	!! @tex $(gC m^{-2})$ @endtex
727	!$OMP THREADPRIVATE(litter_crit)
728	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
729	!$OMP THREADPRIVATE(fire_resist_struct)
730	! 2. Arrays
731
732	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
733	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
734	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
735
736	! 3. Coefficients of equations
737
738	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
739	!$OMP THREADPRIVATE(bcfrac_coeff)
740	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
741	!$OMP THREADPRIVATE(firefrac_coeff)
742
743	!
744	! lpj_gap.f90
745	!
746
747	! 1. Scalar
748
749	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
750	!! @tex $(year^{-1})$ @endtex
751	!$OMP THREADPRIVATE(ref_greff)
752
753	!
754	! lpj_light.f90
755	!
756
757	! 1. Scalar
758
759	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
760	!! to fpc of last time step (F)? (true/false)
761	!$OMP THREADPRIVATE(annual_increase)
762	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
763	!! (due to its branches etc.) (0-1, unitless)
764	!! This means that only a small fraction of its crown area
765	!! can be invaded by other trees.
766	!$OMP THREADPRIVATE(min_cover)
767	!
768	! lpj_pftinout.f90
769	!
770
771	! 1. Scalar
772
773	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
774	!$OMP THREADPRIVATE(min_avail)
775	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
776	!$OMP THREADPRIVATE(ind_0)
777	! 3. Coefficients of equations
778
779	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
780	!$OMP THREADPRIVATE(RIP_time_min)
781	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
782	!$OMP THREADPRIVATE(npp_longterm_init)
783	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
784	!$OMP THREADPRIVATE(everywhere_init)
785
786
787	!
788	! stomate_alloc.f90
789	!
790
791	! 0. Constants
792
793	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
794	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
795
796	! 1. Scalar
797
798	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
799	!! we are severely stressed? (true/false)
800	!$OMP THREADPRIVATE(ok_minres)
801	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
802	!! carbohydrate reserve may be used for
803	!! trees (days)
804	!$OMP THREADPRIVATE(reserve_time_tree)
805	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
806	!! carbohydrate reserve may be used for
807	!! grasses (days)
808	!$OMP THREADPRIVATE(reserve_time_grass)
809
810	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
811	!$OMP THREADPRIVATE(f_fruit)
812	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
813	!! for grass (0-1, unitless)
814	!$OMP THREADPRIVATE(alloc_sap_above_grass)
815	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
816	!! allocation (0-1, unitless)
817	!$OMP THREADPRIVATE(min_LtoLSR)
818	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
819	!! allocation (0-1, unitless)
820	!$OMP THREADPRIVATE(max_LtoLSR)
821	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
822	!$OMP THREADPRIVATE(z_nitrogen)
823
824	! 3. Coefficients of equations
825
826	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
827	!$OMP THREADPRIVATE(Nlim_tref)
828
829
830	!
831	! stomate_data.f90
832	!
833
834	! 1. Scalar
835
836	! 1.1 Parameters for the pipe model
837
838	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
839	!$OMP THREADPRIVATE(pipe_tune1)
840	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
841	!$OMP THREADPRIVATE(pipe_tune2)
842	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
843	!$OMP THREADPRIVATE(pipe_tune3)
844	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
845	!$OMP THREADPRIVATE(pipe_tune4)
846	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
847	!$OMP THREADPRIVATE(pipe_density)
848	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
849	!$OMP THREADPRIVATE(pipe_k1)
850	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
851	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
852
853	! 1.2 climatic parameters
854
855	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
856	!$OMP THREADPRIVATE(precip_crit)
857	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
858	!$OMP THREADPRIVATE(gdd_crit_estab)
859	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
860	!$OMP THREADPRIVATE(fpc_crit)
861
862	! 1.3 sapling characteristics
863
864	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
865	!$OMP THREADPRIVATE(alpha_grass)
866	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
867	!$OMP THREADPRIVATE(alpha_tree)
868	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
869	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
870
871	! 1.4 time scales for phenology and other processes (in days)
872
873	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
874	!$OMP THREADPRIVATE(tau_hum_month)
875	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
876	!$OMP THREADPRIVATE(tau_hum_week)
877	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
878	!$OMP THREADPRIVATE(tau_t2m_month)
879	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
880	!$OMP THREADPRIVATE(tau_t2m_week)
881	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
882	!$OMP THREADPRIVATE(tau_tsoil_month)
883	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
884	!$OMP THREADPRIVATE(tau_soilhum_month)
885	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
886	!$OMP THREADPRIVATE(tau_gpp_week)
887	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
888	!$OMP THREADPRIVATE(tau_gdd)
889	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
890	!$OMP THREADPRIVATE(tau_ngd)
891	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
892	!$OMP THREADPRIVATE(coeff_tau_longterm)
893	REAL(r_std), SAVE :: tau_longterm_max !! (days)
894	!$OMP THREADPRIVATE(tau_longterm_max)
895
896	! 3. Coefficients of equations
897
898	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
899	!$OMP THREADPRIVATE(bm_sapl_carbres)
900	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
901	!$OMP THREADPRIVATE(bm_sapl_sapabove)
902	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
903	!$OMP THREADPRIVATE(bm_sapl_heartabove)
904	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
905	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
906	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
907	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
908	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
909	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
910	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
911	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
912	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
913	!$OMP THREADPRIVATE(init_sapl_mass_root)
914	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
915	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
916	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
917	!$OMP THREADPRIVATE(cn_sapl_init)
918	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
919	!$OMP THREADPRIVATE(migrate_tree)
920	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
921	!$OMP THREADPRIVATE(migrate_grass)
922	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
923	!$OMP THREADPRIVATE(lai_initmin_tree)
924	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
925	!$OMP THREADPRIVATE(lai_initmin_grass)
926	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
927	!$OMP THREADPRIVATE(dia_coeff)
928	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
929	!$OMP THREADPRIVATE(maxdia_coeff)
930	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
931	!$OMP THREADPRIVATE(bm_sapl_leaf)
932
933
934
935	!
936	! stomate_litter.f90
937	!
938
939	! 0. Constants
940
941	REAL(r_std), PARAMETER :: Q10 = 10. !!
942
943	! 1. Scalar
944
945	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
946	!$OMP THREADPRIVATE(z_decomp)
947
948	! 2. Arrays
949
950	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
951	!$OMP THREADPRIVATE(frac_soil_struct_aa)
952	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
953	!$OMP THREADPRIVATE(frac_soil_struct_ab)
954	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
955	!$OMP THREADPRIVATE(frac_soil_struct_sa)
956	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
957	!$OMP THREADPRIVATE(frac_soil_struct_sb)
958	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
959	!$OMP THREADPRIVATE(frac_soil_metab_aa)
960	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
961	!$OMP THREADPRIVATE(frac_soil_metab_ab)
962	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
963	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
964	!$OMP THREADPRIVATE(CN)
965	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
966	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
967	!$OMP THREADPRIVATE(LC)
968
969	! 3. Coefficients of equations
970
971	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
972	!$OMP THREADPRIVATE(metabolic_ref_frac)
973	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
974	!$OMP THREADPRIVATE(metabolic_LN_ratio)
975	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
976	!$OMP THREADPRIVATE(tau_metabolic)
977	REAL(r_std), SAVE :: tau_struct = 0.245 !!
978	!$OMP THREADPRIVATE(tau_struct)
979	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
980	!$OMP THREADPRIVATE(soil_Q10)
981	REAL(r_std), SAVE :: tsoil_ref = 30. !!
982	!$OMP THREADPRIVATE(tsoil_ref)
983	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
984	!$OMP THREADPRIVATE(litter_struct_coef)
985	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
986	!$OMP THREADPRIVATE(moist_coeff)
987	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
988	!$OMP THREADPRIVATE(moistcont_min)
989
990
991	!
992	! stomate_lpj.f90
993	!
994
995	! 1. Scalar
996
997	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
998	!$OMP THREADPRIVATE(frac_turnover_daily)
999
1000
1001	!
1002	! stomate_npp.f90
1003	!
1004
1005	! 1. Scalar
1006
1007	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
1008	!! for maintenance respiration (0-1, unitless)
1009	!$OMP THREADPRIVATE(tax_max)
1010
1011
1012	!
1013	! stomate_phenology.f90
1014	!
1015
1016	! 1. Scalar
1017
1018	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
1019	!$OMP THREADPRIVATE(min_growthinit_time)
1020	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
1021	!! - for trees (0-1, unitless)
1022	!$OMP THREADPRIVATE(moiavail_always_tree)
1023	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1024	!! - for grass (0-1, unitless)
1025	!$OMP THREADPRIVATE(moiavail_always_grass)
1026	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1027	!$OMP THREADPRIVATE(t_always)
1028	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1029	!$OMP THREADPRIVATE(t_always_add)
1030
1031	! 3. Coefficients of equations
1032
1033	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1034	!$OMP THREADPRIVATE(gddncd_ref)
1035	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1036	!$OMP THREADPRIVATE(gddncd_curve)
1037	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1038	!$OMP THREADPRIVATE(gddncd_offset)
1039
1040
1041	!
1042	! stomate_prescribe.f90
1043	!
1044
1045	! 3. Coefficients of equations
1046
1047	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1048	!$OMP THREADPRIVATE(bm_sapl_rescale)
1049
1050
1051	!
1052	! stomate_resp.f90
1053	!
1054
1055	! 3. Coefficients of equations
1056
1057	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1058	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1059	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1060	!$OMP THREADPRIVATE(maint_resp_coeff)
1061
1062
1063	!
1064	! stomate_soilcarbon.f90
1065	!
1066
1067	! 2. Arrays
1068
1069	! 2.1 frac_carb_coefficients
1070
1071	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1072	!! corresponding to frac_carb(:,iactive,ipassive)
1073	!$OMP THREADPRIVATE(frac_carb_ap)
1074	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1075	!! corresponding to frac_carb(:,islow,iactive)
1076	!$OMP THREADPRIVATE(frac_carb_sa)
1077	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1078	!! corresponding to frac_carb(:,islow,ipassive)
1079	!$OMP THREADPRIVATE(frac_carb_sp)
1080	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1081	!! corresponding to frac_carb(:,ipassive,iactive)
1082	!$OMP THREADPRIVATE(frac_carb_pa)
1083	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1084	!! corresponding to frac_carb(:,ipassive,islow)
1085	!$OMP THREADPRIVATE(frac_carb_ps)
1086
1087	! 3. Coefficients of equations
1088
1089	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1090	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1091	!! residence times in carbon pools (days)
1092	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1093	!$OMP THREADPRIVATE(carbon_tau_iactive)
1094	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1095	!$OMP THREADPRIVATE(carbon_tau_islow)
1096	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1097	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1098	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1099	!$OMP THREADPRIVATE(flux_tot_coeff)
1100
1101	!
1102	! stomate_turnover.f90
1103	!
1104
1105	! 3. Coefficients of equations
1106
1107	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1108	!$OMP THREADPRIVATE(new_turnover_time_ref)
1109	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1110	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1111	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1112	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1113
1114
1115	!
1116	! stomate_vmax.f90
1117	!
1118
1119	! 1. Scalar
1120
1121	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1122	!$OMP THREADPRIVATE(vmax_offset)
1123	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1124	!! reaches 1 (unitless)
1125	!$OMP THREADPRIVATE(leafage_firstmax)
1126	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1127	!! falls below 1 (unitless)
1128	!$OMP THREADPRIVATE(leafage_lastmax)
1129	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1130	!! reaches its minimum (vmax_offset)
1131	!! (unitless)
1132	!$OMP THREADPRIVATE(leafage_old)
1133	!
1134	! stomate_season.f90
1135	!
1136
1137	! 1. Scalar
1138
1139	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1140	!$OMP THREADPRIVATE(gppfrac_dormance)
1141	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1142	!$OMP THREADPRIVATE(tau_climatology)
1143	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1144	!$OMP THREADPRIVATE(hvc1)
1145	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1146	!$OMP THREADPRIVATE(hvc2)
1147	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1148	!$OMP THREADPRIVATE(leaf_frac_hvc)
1149	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1150	!$OMP THREADPRIVATE(tlong_ref_max)
1151	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1152	!$OMP THREADPRIVATE(tlong_ref_min)
1153
1154	! 3. Coefficients of equations
1155
1156	REAL(r_std), SAVE :: ncd_max_year = 3.
1157	!$OMP THREADPRIVATE(ncd_max_year)
1158	REAL(r_std), SAVE :: gdd_threshold = 5.
1159	!$OMP THREADPRIVATE(gdd_threshold)
1160	REAL(r_std), SAVE :: green_age_ever = 2.
1161	!$OMP THREADPRIVATE(green_age_ever)
1162	REAL(r_std), SAVE :: green_age_dec = 0.5
1163	!$OMP THREADPRIVATE(green_age_dec)
1164
1165	END MODULE constantes_var

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