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source: tags/ORCHIDEE_2_1/ORCHIDEE/src_parameters/constantes_var.f90 @ 5630

Last change on this file since 5630 was 5605, checked in by josefine.ghattas, 6 years ago

Added new option VEGETMAP_RESET. This option should be used to to change vegetation map while keeping VEGET_UPDATE=0Y. This option will read the vegetation map even if it is stored in the restart file. It will also set to zero carbon related variables: prod10, prod100, flux10, flux100, convflux, cflux_prod10, cflux_prod100, convfluxpft(:,:)

Cadule, J. Ghattas

Property svn:keywords set to Date Revision

File size: 57.1 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	!$OMP THREADPRIVATE(min_wind)
324	REAL(r_std), SAVE :: snowcri = 1.5 !! Sets the amount above which only sublimation occures (kg.m^{-2})
325	!$OMP THREADPRIVATE(snowcri)
326
327
328	!
329	! FLAGS ACTIVATING SUB-MODELS
330	!
331	LOGICAL, SAVE :: treat_expansion = .FALSE. !! Do we treat PFT expansion across a grid point after introduction? (true/false)
332	!$OMP THREADPRIVATE(treat_expansion)
333	LOGICAL, SAVE :: ok_herbivores = .FALSE. !! flag to activate herbivores (true/false)
334	!$OMP THREADPRIVATE(ok_herbivores)
335	LOGICAL, SAVE :: harvest_agri = .TRUE. !! flag to harvest aboveground biomass from agricultural PFTs)(true/false)
336	!$OMP THREADPRIVATE(harvest_agri)
337	LOGICAL, SAVE :: lpj_gap_const_mort !! constant moratlity (true/false). Default value depend on OK_DGVM.
338	!$OMP THREADPRIVATE(lpj_gap_const_mort)
339	LOGICAL, SAVE :: disable_fire = .TRUE. !! flag that disable fire (true/false)
340	!$OMP THREADPRIVATE(disable_fire)
341	LOGICAL, SAVE :: spinup_analytic = .FALSE. !! Flag to activate analytical resolution for spinup (true/false)
342	!$OMP THREADPRIVATE(spinup_analytic)
343
344	!
345	! CONFIGURATION VEGETATION
346	!
347	LOGICAL, SAVE :: agriculture = .TRUE. !! allow agricultural PFTs (true/false)
348	!$OMP THREADPRIVATE(agriculture)
349	LOGICAL, SAVE :: impveg = .FALSE. !! Impose vegetation ? (true/false)
350	!$OMP THREADPRIVATE(impveg)
351	LOGICAL, SAVE :: impsoilt = .FALSE. !! Impose soil ? (true/false)
352	!$OMP THREADPRIVATE(impsoilt)
353	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
354	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
355	LOGICAL, SAVE :: do_now_stomate_woodharvest = .FALSE. !! Time to call woodharvest in stomate_lpj
356	!$OMP THREADPRIVATE(do_now_stomate_woodharvest)
357	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
358	!$OMP THREADPRIVATE(done_stomate_lcchange)
359	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
360	!$OMP THREADPRIVATE(read_lai)
361	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
362	!$OMP THREADPRIVATE(veget_reinit)
363	LOGICAL, SAVE :: vegetmap_reset = .FALSE.!! Reset the vegetation map and reset carbon related variables
364	!$OMP THREADPRIVATE(vegetmap_reset)
365	INTEGER(i_std) , SAVE :: veget_update !! Update frequency in years for landuse (nb of years)
366	!$OMP THREADPRIVATE(veget_update)
367	!
368	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
369	!
370	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
371	!$OMP THREADPRIVATE(max_snow_age)
372	REAL(r_std), SAVE :: snow_trans = 0.2_r_std !! Transformation time constant for snow (m), reduced from the value 0.3 (04/07/2016)
373	!$OMP THREADPRIVATE(snow_trans)
374	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
375	!$OMP THREADPRIVATE(sneige)
376	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
377	!$OMP THREADPRIVATE(maxmass_snow)
378
379	!! Heat capacity
380	REAL(r_std), PARAMETER :: capa_ice = 2.228*1.E3 !! Heat capacity of ice (J/kg/K)
381	REAL(r_std), SAVE :: so_capa_ice !! Heat capacity of saturated frozen soil (J/K/m3)
382	!$OMP THREADPRIVATE(so_capa_ice)
383	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
384	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
385	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
386
387	!! Thermal conductivities
388	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
389	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
390	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
391
392	!! Time constant of long-term soil humidity (s)
393	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
394
395	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
396	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
397	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
398	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
399	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
400	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
401	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
402	REAL(r_std), PARAMETER :: thick_min_snow = .01
403
404	!! The maximum snow density and water holding characterisicts
405	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
406	!$OMP THREADPRIVATE(xrhosmax)
407	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
408	!$OMP THREADPRIVATE(xwsnowholdmax1)
409	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
410	!$OMP THREADPRIVATE(xwsnowholdmax2)
411	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
412	!$OMP THREADPRIVATE(xsnowrhohold)
413	REAL(r_std), SAVE :: xrhosmin = 50.
414	!$OMP THREADPRIVATE(xrhosmin)
415	REAL(r_std), PARAMETER :: xci = 2.106e+3
416	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
417
418	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
419	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
420
421	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
422	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
423
424	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
425	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
426	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
427	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
428
429	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
430
431	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
432	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
433	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
434
435	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
436
437	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
438	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
439	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
440	!$OMP THREADPRIVATE(ZSNOWTHRMCOND1)
441	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
442	!$OMP THREADPRIVATE(ZSNOWTHRMCOND2)
443
444	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
445	! (sig only for new snow OR high altitudes)
446	! from Sun et al. (1999): based on data from Jordan (1991)
447	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
448	!
449	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
450	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_AVAP)
451	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
452	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_BVAP)
453	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
454	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_CVAP)
455
456	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
457	!$OMP THREADPRIVATE(xansmax)
458	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
459	!$OMP THREADPRIVATE(xansmin)
460	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
461	!$OMP THREADPRIVATE(xans_todry)
462	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
463	!$OMP THREADPRIVATE(xans_t)
464
465	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
466	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
467	REAL(r_std), PARAMETER :: XP00 = 1.E5
468
469	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
470	! (sig only for new snow OR high altitudes)
471	! from Sun et al. (1999): based on data from Jordan (1991)
472	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
473	!
474	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
475	!$OMP THREADPRIVATE(ZSNOWCMPCT_RHOD)
476	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s
477	!$OMP THREADPRIVATE(ZSNOWCMPCT_ACM)
478	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
479	!$OMP THREADPRIVATE(ZSNOWCMPCT_BCM)
480	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
481	!$OMP THREADPRIVATE(ZSNOWCMPCT_CCM)
482	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
483	!$OMP THREADPRIVATE(ZSNOWCMPCT_V0)
484	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
485	!$OMP THREADPRIVATE(ZSNOWCMPCT_VT)
486	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
487	!$OMP THREADPRIVATE(ZSNOWCMPCT_VR)
488
489	!
490	! BVOC : Biogenic activity for each age class
491	!
492	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
493	!! age class : isoprene (unitless)
494	!$OMP THREADPRIVATE(iso_activity)
495	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
496	!! age class : methanol (unnitless)
497	!$OMP THREADPRIVATE(methanol_activity)
498
499	!
500	! condveg.f90
501	!
502
503	! 1. Scalar
504
505	! 1.1 Flags used inside the module
506
507	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
508	!! albedo (see header of subroutine)
509	!! (true/false)
510	!$OMP THREADPRIVATE(alb_bare_model)
511	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
512	!! albedo read from file
513	!! (true/false)
514	!$OMP THREADPRIVATE(alb_bg_modis)
515	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
516	!! (see header of subroutine).
517	!! (true/false)
518	!$OMP THREADPRIVATE(impaze)
519	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
520	!! the roughness height : static or dynamic (varying with LAI)
521	!! (true/false)
522	!$OMP THREADPRIVATE(rough_dyn)
523
524	LOGICAL, SAVE :: new_watstress = .FALSE.
525	!$OMP THREADPRIVATE(new_watstress)
526
527	REAL(r_std), SAVE :: alpha_watstress = 1.
528	!$OMP THREADPRIVATE(alpha_watstress)
529
530	! 1.2 Others
531
532
533	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
534	!! height from vegetation height (m)
535	!$OMP THREADPRIVATE(height_displacement)
536	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
537	!$OMP THREADPRIVATE(z0_bare)
538	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
539	!$OMP THREADPRIVATE(z0_ice)
540	REAL(r_std), SAVE :: tcst_snowa = 10.0 !! Time constant of the albedo decay of snow (days), increased from the value 5.0 (04/07/2016)
541	!$OMP THREADPRIVATE(tcst_snowa)
542	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
543	!$OMP THREADPRIVATE(snowcri_alb)
544	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
545	!$OMP THREADPRIVATE(fixed_snow_albedo)
546	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
547	!$OMP THREADPRIVATE(z0_scal)
548	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
549	!! displacement height (m) (imposed)
550	!$OMP THREADPRIVATE(roughheight_scal)
551	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
552	!$OMP THREADPRIVATE(emis_scal)
553
554	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
555	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
556	!! see Ershadi et al. (2015) for more info
557	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
558	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
559	!! see Ershadi et al. (2015) for more info
560	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
561	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
562	!! see Ershadi et al. (2015) for more info
563	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
564	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
565	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
566	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
567	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
568	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
569
570
571
572	! 2. Arrays
573
574	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
575	!$OMP THREADPRIVATE(alb_deadleaf)
576	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
577	!$OMP THREADPRIVATE(alb_ice)
578	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
579	!! used imposed (unitless)
580	!$OMP THREADPRIVATE(albedo_scal)
581	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
582	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
583	!! dry soil albedo values in visible range
584	!$OMP THREADPRIVATE(vis_dry)
585	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
586	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
587	!! dry soil albedo values in near-infrared range
588	!$OMP THREADPRIVATE(nir_dry)
589	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
590	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
591	!! wet soil albedo values in visible range
592	!$OMP THREADPRIVATE(vis_wet)
593	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
594	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
595	!! wet soil albedo values in near-infrared range
596	!$OMP THREADPRIVATE(nir_wet)
597	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
598	&0.18, 0.16, 0.16, 0.15, 0.12, 0.105, 0.09, 0.075, 0.25/) !! Soil albedo values to soil colour classification:
599	!! Averaged of wet and dry soil albedo values
600	!! in visible and near-infrared range
601	!$OMP THREADPRIVATE(albsoil_vis)
602	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
603	&0.36, 0.34, 0.34, 0.33, 0.30, 0.25, 0.20, 0.15, 0.45/) !! Soil albedo values to soil colour classification:
604	!! Averaged of wet and dry soil albedo values
605	!! in visible and near-infrared range
606	!$OMP THREADPRIVATE(albsoil_nir)
607
608	!
609	! diffuco.f90
610	!
611
612	! 0. Constants
613
614	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
615	!! of dry air (unitless)
616	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
617	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
618	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
619	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
620	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
621
622	! 1. Scalar
623
624	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
625	!$OMP THREADPRIVATE(nlai)
626	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
627	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
628	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
629	!$OMP THREADPRIVATE(laimax)
630	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation.
631	!$OMP THREADPRIVATE(downregulation_co2)
632	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
633	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
634
635	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
636	!$OMP THREADPRIVATE(gb_ref)
637
638	! 3. Coefficients of equations
639
640	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
641	!$OMP THREADPRIVATE(lai_level_depth)
642	!
643	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
644	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
645	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
646	!
647	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
648	!$OMP THREADPRIVATE(Oi)
649	!
650	! slowproc.f90
651	!
652
653	! 1. Scalar
654
655	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
656	!$OMP THREADPRIVATE(veget_year_orig)
657	! The default value for clay fraction is an heritage, with no documentation nor justification.
658	REAL(r_std), SAVE :: clayfraction_default = 0.2 !! Default value for clay fraction (0-1, unitless)
659	!$OMP THREADPRIVATE(clayfraction_default)
660	! We need to output sand and silt fractiosn for SP-MIP, and the following default values, corresponding to a Loamy soil, are selected.
661	REAL(r_std), SAVE :: sandfraction_default = 0.4 !! Default value for sand fraction (0-1, unitless)
662	!$OMP THREADPRIVATE(sandfraction_default)
663	REAL(r_std), SAVE :: siltfraction_default = 0.4 !! Default value for silt fraction (0-1, unitless)
664	!$OMP THREADPRIVATE(siltfraction_default)
665	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
666	!$OMP THREADPRIVATE(min_vegfrac)
667	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
668	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
669
670	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
671	!$OMP THREADPRIVATE(stempdiag_bid)
672
673
674	!-----------------------------!
675	! STOMATE AND LPJ PARAMETERS !
676	!-----------------------------!
677
678
679	!
680	! lpj_constraints.f90
681	!
682
683	! 1. Scalar
684
685	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
686	!! regeneration (vernalization) (years)
687	!$OMP THREADPRIVATE(too_long)
688
689
690	!
691	! lpj_establish.f90
692	!
693
694	! 1. Scalar
695
696	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
697	!$OMP THREADPRIVATE(estab_max_tree)
698	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
699	!$OMP THREADPRIVATE(estab_max_grass)
700
701	! 3. Coefficients of equations
702
703	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
704	!$OMP THREADPRIVATE(establish_scal_fact)
705	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
706	!$OMP THREADPRIVATE(max_tree_coverage)
707	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
708	!$OMP THREADPRIVATE(ind_0_estab)
709
710
711	!
712	! lpj_fire.f90
713	!
714
715	! 1. Scalar
716
717	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
718	!$OMP THREADPRIVATE(tau_fire)
719	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
720	!! below which iginitions extinguish
721	!! @tex $(gC m^{-2})$ @endtex
722	!$OMP THREADPRIVATE(litter_crit)
723	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
724	!$OMP THREADPRIVATE(fire_resist_struct)
725	! 2. Arrays
726
727	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
728	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
729	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
730
731	! 3. Coefficients of equations
732
733	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
734	!$OMP THREADPRIVATE(bcfrac_coeff)
735	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
736	!$OMP THREADPRIVATE(firefrac_coeff)
737
738	!
739	! lpj_gap.f90
740	!
741
742	! 1. Scalar
743
744	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
745	!! @tex $(year^{-1})$ @endtex
746	!$OMP THREADPRIVATE(ref_greff)
747
748	!
749	! lpj_light.f90
750	!
751
752	! 1. Scalar
753
754	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
755	!! to fpc of last time step (F)? (true/false)
756	!$OMP THREADPRIVATE(annual_increase)
757	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
758	!! (due to its branches etc.) (0-1, unitless)
759	!! This means that only a small fraction of its crown area
760	!! can be invaded by other trees.
761	!$OMP THREADPRIVATE(min_cover)
762	!
763	! lpj_pftinout.f90
764	!
765
766	! 1. Scalar
767
768	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
769	!$OMP THREADPRIVATE(min_avail)
770	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
771	!$OMP THREADPRIVATE(ind_0)
772	! 3. Coefficients of equations
773
774	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
775	!$OMP THREADPRIVATE(RIP_time_min)
776	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
777	!$OMP THREADPRIVATE(npp_longterm_init)
778	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
779	!$OMP THREADPRIVATE(everywhere_init)
780
781
782	!
783	! stomate_alloc.f90
784	!
785
786	! 0. Constants
787
788	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
789	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
790
791	! 1. Scalar
792
793	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
794	!! we are severely stressed? (true/false)
795	!$OMP THREADPRIVATE(ok_minres)
796	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
797	!! carbohydrate reserve may be used for
798	!! trees (days)
799	!$OMP THREADPRIVATE(reserve_time_tree)
800	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
801	!! carbohydrate reserve may be used for
802	!! grasses (days)
803	!$OMP THREADPRIVATE(reserve_time_grass)
804
805	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
806	!$OMP THREADPRIVATE(f_fruit)
807	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
808	!! for grass (0-1, unitless)
809	!$OMP THREADPRIVATE(alloc_sap_above_grass)
810	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
811	!! allocation (0-1, unitless)
812	!$OMP THREADPRIVATE(min_LtoLSR)
813	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
814	!! allocation (0-1, unitless)
815	!$OMP THREADPRIVATE(max_LtoLSR)
816	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
817	!$OMP THREADPRIVATE(z_nitrogen)
818
819	! 3. Coefficients of equations
820
821	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
822	!$OMP THREADPRIVATE(Nlim_tref)
823
824
825	!
826	! stomate_data.f90
827	!
828
829	! 1. Scalar
830
831	! 1.1 Parameters for the pipe model
832
833	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
834	!$OMP THREADPRIVATE(pipe_tune1)
835	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
836	!$OMP THREADPRIVATE(pipe_tune2)
837	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
838	!$OMP THREADPRIVATE(pipe_tune3)
839	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
840	!$OMP THREADPRIVATE(pipe_tune4)
841	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
842	!$OMP THREADPRIVATE(pipe_density)
843	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
844	!$OMP THREADPRIVATE(pipe_k1)
845	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
846	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
847
848	! 1.2 climatic parameters
849
850	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
851	!$OMP THREADPRIVATE(precip_crit)
852	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
853	!$OMP THREADPRIVATE(gdd_crit_estab)
854	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
855	!$OMP THREADPRIVATE(fpc_crit)
856
857	! 1.3 sapling characteristics
858
859	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
860	!$OMP THREADPRIVATE(alpha_grass)
861	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
862	!$OMP THREADPRIVATE(alpha_tree)
863	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
864	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
865
866	! 1.4 time scales for phenology and other processes (in days)
867
868	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
869	!$OMP THREADPRIVATE(tau_hum_month)
870	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
871	!$OMP THREADPRIVATE(tau_hum_week)
872	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
873	!$OMP THREADPRIVATE(tau_t2m_month)
874	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
875	!$OMP THREADPRIVATE(tau_t2m_week)
876	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
877	!$OMP THREADPRIVATE(tau_tsoil_month)
878	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
879	!$OMP THREADPRIVATE(tau_soilhum_month)
880	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
881	!$OMP THREADPRIVATE(tau_gpp_week)
882	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
883	!$OMP THREADPRIVATE(tau_gdd)
884	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
885	!$OMP THREADPRIVATE(tau_ngd)
886	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
887	!$OMP THREADPRIVATE(coeff_tau_longterm)
888	REAL(r_std), SAVE :: tau_longterm_max !! (days)
889	!$OMP THREADPRIVATE(tau_longterm_max)
890
891	! 3. Coefficients of equations
892
893	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
894	!$OMP THREADPRIVATE(bm_sapl_carbres)
895	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
896	!$OMP THREADPRIVATE(bm_sapl_sapabove)
897	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
898	!$OMP THREADPRIVATE(bm_sapl_heartabove)
899	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
900	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
901	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
902	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
903	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
904	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
905	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
906	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
907	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
908	!$OMP THREADPRIVATE(init_sapl_mass_root)
909	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
910	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
911	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
912	!$OMP THREADPRIVATE(cn_sapl_init)
913	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
914	!$OMP THREADPRIVATE(migrate_tree)
915	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
916	!$OMP THREADPRIVATE(migrate_grass)
917	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
918	!$OMP THREADPRIVATE(lai_initmin_tree)
919	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
920	!$OMP THREADPRIVATE(lai_initmin_grass)
921	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
922	!$OMP THREADPRIVATE(dia_coeff)
923	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
924	!$OMP THREADPRIVATE(maxdia_coeff)
925	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
926	!$OMP THREADPRIVATE(bm_sapl_leaf)
927
928
929
930	!
931	! stomate_litter.f90
932	!
933
934	! 0. Constants
935
936	REAL(r_std), PARAMETER :: Q10 = 10. !!
937
938	! 1. Scalar
939
940	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
941	!$OMP THREADPRIVATE(z_decomp)
942
943	! 2. Arrays
944
945	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
946	!$OMP THREADPRIVATE(frac_soil_struct_aa)
947	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
948	!$OMP THREADPRIVATE(frac_soil_struct_ab)
949	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
950	!$OMP THREADPRIVATE(frac_soil_struct_sa)
951	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
952	!$OMP THREADPRIVATE(frac_soil_struct_sb)
953	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
954	!$OMP THREADPRIVATE(frac_soil_metab_aa)
955	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
956	!$OMP THREADPRIVATE(frac_soil_metab_ab)
957	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
958	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
959	!$OMP THREADPRIVATE(CN)
960	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
961	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
962	!$OMP THREADPRIVATE(LC)
963
964	! 3. Coefficients of equations
965
966	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
967	!$OMP THREADPRIVATE(metabolic_ref_frac)
968	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
969	!$OMP THREADPRIVATE(metabolic_LN_ratio)
970	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
971	!$OMP THREADPRIVATE(tau_metabolic)
972	REAL(r_std), SAVE :: tau_struct = 0.245 !!
973	!$OMP THREADPRIVATE(tau_struct)
974	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
975	!$OMP THREADPRIVATE(soil_Q10)
976	REAL(r_std), SAVE :: tsoil_ref = 30. !!
977	!$OMP THREADPRIVATE(tsoil_ref)
978	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
979	!$OMP THREADPRIVATE(litter_struct_coef)
980	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
981	!$OMP THREADPRIVATE(moist_coeff)
982	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
983	!$OMP THREADPRIVATE(moistcont_min)
984
985
986	!
987	! stomate_lpj.f90
988	!
989
990	! 1. Scalar
991
992	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
993	!$OMP THREADPRIVATE(frac_turnover_daily)
994
995
996	!
997	! stomate_npp.f90
998	!
999
1000	! 1. Scalar
1001
1002	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
1003	!! for maintenance respiration (0-1, unitless)
1004	!$OMP THREADPRIVATE(tax_max)
1005
1006
1007	!
1008	! stomate_phenology.f90
1009	!
1010
1011	! 1. Scalar
1012
1013	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
1014	!$OMP THREADPRIVATE(min_growthinit_time)
1015	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
1016	!! - for trees (0-1, unitless)
1017	!$OMP THREADPRIVATE(moiavail_always_tree)
1018	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1019	!! - for grass (0-1, unitless)
1020	!$OMP THREADPRIVATE(moiavail_always_grass)
1021	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1022	!$OMP THREADPRIVATE(t_always)
1023	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1024	!$OMP THREADPRIVATE(t_always_add)
1025
1026	! 3. Coefficients of equations
1027
1028	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1029	!$OMP THREADPRIVATE(gddncd_ref)
1030	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1031	!$OMP THREADPRIVATE(gddncd_curve)
1032	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1033	!$OMP THREADPRIVATE(gddncd_offset)
1034
1035
1036	!
1037	! stomate_prescribe.f90
1038	!
1039
1040	! 3. Coefficients of equations
1041
1042	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1043	!$OMP THREADPRIVATE(bm_sapl_rescale)
1044
1045
1046	!
1047	! stomate_resp.f90
1048	!
1049
1050	! 3. Coefficients of equations
1051
1052	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1053	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1054	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1055	!$OMP THREADPRIVATE(maint_resp_coeff)
1056
1057
1058	!
1059	! stomate_soilcarbon.f90
1060	!
1061
1062	! 2. Arrays
1063
1064	! 2.1 frac_carb_coefficients
1065
1066	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1067	!! corresponding to frac_carb(:,iactive,ipassive)
1068	!$OMP THREADPRIVATE(frac_carb_ap)
1069	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1070	!! corresponding to frac_carb(:,islow,iactive)
1071	!$OMP THREADPRIVATE(frac_carb_sa)
1072	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1073	!! corresponding to frac_carb(:,islow,ipassive)
1074	!$OMP THREADPRIVATE(frac_carb_sp)
1075	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1076	!! corresponding to frac_carb(:,ipassive,iactive)
1077	!$OMP THREADPRIVATE(frac_carb_pa)
1078	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1079	!! corresponding to frac_carb(:,ipassive,islow)
1080	!$OMP THREADPRIVATE(frac_carb_ps)
1081
1082	! 3. Coefficients of equations
1083
1084	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1085	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1086	!! residence times in carbon pools (days)
1087	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1088	!$OMP THREADPRIVATE(carbon_tau_iactive)
1089	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1090	!$OMP THREADPRIVATE(carbon_tau_islow)
1091	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1092	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1093	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1094	!$OMP THREADPRIVATE(flux_tot_coeff)
1095
1096	!
1097	! stomate_turnover.f90
1098	!
1099
1100	! 3. Coefficients of equations
1101
1102	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1103	!$OMP THREADPRIVATE(new_turnover_time_ref)
1104	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1105	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1106	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1107	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1108
1109
1110	!
1111	! stomate_vmax.f90
1112	!
1113
1114	! 1. Scalar
1115
1116	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1117	!$OMP THREADPRIVATE(vmax_offset)
1118	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1119	!! reaches 1 (unitless)
1120	!$OMP THREADPRIVATE(leafage_firstmax)
1121	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1122	!! falls below 1 (unitless)
1123	!$OMP THREADPRIVATE(leafage_lastmax)
1124	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1125	!! reaches its minimum (vmax_offset)
1126	!! (unitless)
1127	!$OMP THREADPRIVATE(leafage_old)
1128	!
1129	! stomate_season.f90
1130	!
1131
1132	! 1. Scalar
1133
1134	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1135	!$OMP THREADPRIVATE(gppfrac_dormance)
1136	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1137	!$OMP THREADPRIVATE(tau_climatology)
1138	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1139	!$OMP THREADPRIVATE(hvc1)
1140	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1141	!$OMP THREADPRIVATE(hvc2)
1142	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1143	!$OMP THREADPRIVATE(leaf_frac_hvc)
1144	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1145	!$OMP THREADPRIVATE(tlong_ref_max)
1146	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1147	!$OMP THREADPRIVATE(tlong_ref_min)
1148
1149	! 3. Coefficients of equations
1150
1151	REAL(r_std), SAVE :: ncd_max_year = 3.
1152	!$OMP THREADPRIVATE(ncd_max_year)
1153	REAL(r_std), SAVE :: gdd_threshold = 5.
1154	!$OMP THREADPRIVATE(gdd_threshold)
1155	REAL(r_std), SAVE :: green_age_ever = 2.
1156	!$OMP THREADPRIVATE(green_age_ever)
1157	REAL(r_std), SAVE :: green_age_dec = 0.5
1158	!$OMP THREADPRIVATE(green_age_dec)
1159
1160	END MODULE constantes_var

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