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source: branches/publications/ORCHIDEE-GMv3.2/ORCHIDEE/src_parameters/constantes_var.f90 @ 5816

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1	! =================================================================================================================================
2	! MODULE : constantes_var
3	!
4	! CONTACT : orchidee-help _at_ ipsl.jussieu.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, SAVE :: NC_COMPRESSION_ENABLE !! activate netcdf output compression
53	!$OMP THREADPRIVATE(NC_COMPRESSION_ENABLE)
54	LOGICAL :: river_routing !! activate river routing
55	!$OMP THREADPRIVATE(river_routing)
56	LOGICAL :: hydrol_cwrr !! activate 11 layers hydrolgy model
57	!$OMP THREADPRIVATE(hydrol_cwrr)
58	LOGICAL :: do_floodplains !! activate flood plains
59	!$OMP THREADPRIVATE(do_floodplains)
60	LOGICAL :: do_irrigation !! activate computation of irrigation flux
61	!$OMP THREADPRIVATE(do_irrigation)
62	LOGICAL :: ok_sechiba !! activate physic of the model
63	!$OMP THREADPRIVATE(ok_sechiba)
64	LOGICAL :: ok_co2 !! activate photosynthesis
65	!$OMP THREADPRIVATE(ok_co2)
66	LOGICAL :: ok_stomate !! activate carbon cycle
67	!$OMP THREADPRIVATE(ok_stomate)
68	LOGICAL :: ok_dgvm !! activate dynamic vegetation
69	!$OMP THREADPRIVATE(ok_dgvm)
70	LOGICAL :: ok_pheno !! activate the calculation of lai using stomate rather than a prescription
71	!$OMP THREADPRIVATE(ok_pheno)
72	LOGICAL :: ok_bvoc !! activate biogenic volatile organic coumpounds
73	!$OMP THREADPRIVATE(ok_bvoc)
74	LOGICAL :: ok_leafage !! activate leafage
75	!$OMP THREADPRIVATE(ok_leafage)
76	LOGICAL :: ok_radcanopy !! use canopy radiative transfer model
77	!$OMP THREADPRIVATE(ok_radcanopy)
78	LOGICAL :: ok_multilayer !! use canopy radiative transfer model with multi-layers
79	!$OMP THREADPRIVATE(ok_multilayer)
80	LOGICAL :: ok_pulse_NOx !! calculate NOx emissions with pulse
81	!$OMP THREADPRIVATE(ok_pulse_NOx)
82	LOGICAL :: ok_bbgfertil_NOx !! calculate NOx emissions with bbg fertilizing effect
83	!$OMP THREADPRIVATE(ok_bbgfertil_NOx)
84	LOGICAL :: ok_cropsfertil_NOx !! calculate NOx emissions with fertilizers use
85	!$OMP THREADPRIVATE(ok_cropsfertil_NOx)
86
87	LOGICAL :: ok_co2bvoc_poss !! CO2 inhibition on isoprene activated following Possell et al. (2005) model
88	!$OMP THREADPRIVATE(ok_co2bvoc_poss)
89	LOGICAL :: ok_co2bvoc_wilk !! CO2 inhibition on isoprene activated following Wilkinson et al. (2006) model
90	!$OMP THREADPRIVATE(ok_co2bvoc_wilk)
91
92	LOGICAL, SAVE :: OFF_LINE_MODE = .FALSE. !! ORCHIDEE detects if it is coupled with a GCM or
93	!! just use with one driver in OFF-LINE. (true/false)
94	!$OMP THREADPRIVATE(OFF_LINE_MODE)
95	LOGICAL, SAVE :: impose_param = .TRUE. !! Flag impos_param : read all the parameters in the run.def file
96	!$OMP THREADPRIVATE(impose_param)
97	CHARACTER(LEN=80), SAVE :: restname_in = 'NONE' !! Input Restart files name for Sechiba component
98	!$OMP THREADPRIVATE(restname_in)
99	CHARACTER(LEN=80), SAVE :: restname_out = 'sechiba_rest_out.nc' !! Output Restart files name for Sechiba component
100	!$OMP THREADPRIVATE(restname_out)
101	CHARACTER(LEN=80), SAVE :: stom_restname_in = 'NONE' !! Input Restart files name for Stomate component
102	!$OMP THREADPRIVATE(stom_restname_in)
103	CHARACTER(LEN=80), SAVE :: stom_restname_out = 'stomate_rest_out.nc' !! Output Restart files name for Stomate component
104	!$OMP THREADPRIVATE(stom_restname_out)
105	INTEGER, SAVE :: printlev=1 !! Standard level for text output [0, 1, 2, 3]
106	!$OMP THREADPRIVATE(printlev)
107
108	!
109	! TIME
110	!
111	REAL(r_std), SAVE :: one_day !! One day in seconds (s)
112	!$OMP THREADPRIVATE(one_day)
113	REAL(r_std), SAVE :: one_year !! One year in days
114	!$OMP THREADPRIVATE(one_year)
115	REAL(r_std), PARAMETER :: one_hour = 3600.0 !! One hour in seconds (s)
116	INTEGER(i_std), PARAMETER :: spring_days_max = 40 !! Maximum number of days during which we watch for possible spring frost damage
117
118	! TIME STEP
119	REAL(r_std) :: dt_sechiba !! Time step in sechiba
120	!$OMP THREADPRIVATE(dt_sechiba)
121	REAL(r_std) :: dt_stomate !! Time step in stomate
122	!$OMP THREADPRIVATE(dt_stomate)
123
124	!
125	! SPECIAL VALUES
126	!
127	INTEGER(i_std), PARAMETER :: undef_int = 999999999 !! undef integer for integer arrays (unitless)
128	!-
129	REAL(r_std), SAVE :: val_exp = 999999. !! Specific value if no restart value (unitless)
130	!$OMP THREADPRIVATE(val_exp)
131	REAL(r_std), PARAMETER :: undef = -9999. !! Special value for stomate (unitless)
132
133	REAL(r_std), PARAMETER :: min_sechiba = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
134	REAL(r_std), PARAMETER :: undef_sechiba = 1.E+20_r_std !! The undef value used in SECHIBA (unitless)
135
136	REAL(r_std), PARAMETER :: min_stomate = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
137	REAL(r_std), PARAMETER :: large_value = 1.E33_r_std !! some large value (for stomate) (unitless)
138
139
140	!
141	! DIMENSIONING AND INDICES PARAMETERS
142	!
143	INTEGER(i_std), PARAMETER :: ibare_sechiba = 1 !! Index for bare soil in Sechiba (unitless)
144	INTEGER(i_std), PARAMETER :: ivis = 1 !! index for albedo in visible range (unitless)
145	INTEGER(i_std), PARAMETER :: inir = 2 !! index for albeod i near-infrared range (unitless)
146	INTEGER(i_std), PARAMETER :: nnobio = 1 !! Number of other surface types: land ice (lakes,cities, ...) (unitless)
147	INTEGER(i_std), PARAMETER :: iice = 1 !! Index for land ice (see nnobio) (unitless)
148	!-
149	!! Soil
150	INTEGER(i_std), PARAMETER :: classnb = 9 !! Levels of soil colour classification (unitless)
151	!-
152	INTEGER(i_std), PARAMETER :: nleafages = 4 !! leaf age discretisation ( 1 = no discretisation )(unitless)
153	!-
154	!! litter fractions: indices (unitless)
155	INTEGER(i_std), PARAMETER :: ileaf = 1 !! Index for leaf compartment (unitless)
156	INTEGER(i_std), PARAMETER :: isapabove = 2 !! Index for sapwood above compartment (unitless)
157	INTEGER(i_std), PARAMETER :: isapbelow = 3 !! Index for sapwood below compartment (unitless)
158	INTEGER(i_std), PARAMETER :: iheartabove = 4 !! Index for heartwood above compartment (unitless)
159	INTEGER(i_std), PARAMETER :: iheartbelow = 5 !! Index for heartwood below compartment (unitless)
160	INTEGER(i_std), PARAMETER :: iroot = 6 !! Index for roots compartment (unitless)
161	INTEGER(i_std), PARAMETER :: ifruit = 7 !! Index for fruits compartment (unitless)
162	INTEGER(i_std), PARAMETER :: icarbres = 8 !! Index for reserve compartment (unitless)
163	INTEGER(i_std), PARAMETER :: nparts = 8 !! Number of biomass compartments (unitless)
164	!-
165	!! indices for assimilation parameters
166	INTEGER(i_std), PARAMETER :: ivcmax = 1 !! Index for vcmax (assimilation parameters) (unitless)
167	INTEGER(i_std), PARAMETER :: npco2 = 1 !! Number of assimilation parameters (unitless)
168	!-
169	!! trees and litter: indices for the parts of heart-
170	!! and sapwood above and below the ground
171	INTEGER(i_std), PARAMETER :: iabove = 1 !! Index for above part (unitless)
172	INTEGER(i_std), PARAMETER :: ibelow = 2 !! Index for below part (unitless)
173	INTEGER(i_std), PARAMETER :: nlevs = 2 !! Number of levels for trees and litter (unitless)
174	!-
175	!! litter: indices for metabolic and structural part
176	INTEGER(i_std), PARAMETER :: imetabolic = 1 !! Index for metabolic litter (unitless)
177	INTEGER(i_std), PARAMETER :: istructural = 2 !! Index for structural litter (unitless)
178	INTEGER(i_std), PARAMETER :: nlitt = 2 !! Number of levels for litter compartments (unitless)
179	!-
180	!! carbon pools: indices
181	INTEGER(i_std), PARAMETER :: iactive = 1 !! Index for active carbon pool (unitless)
182	INTEGER(i_std), PARAMETER :: islow = 2 !! Index for slow carbon pool (unitless)
183	INTEGER(i_std), PARAMETER :: ipassive = 3 !! Index for passive carbon pool (unitless)
184	INTEGER(i_std), PARAMETER :: ncarb = 3 !! Number of soil carbon pools (unitless)
185	!-
186	!! For isotopes and nitrogen
187	INTEGER(i_std), PARAMETER :: nelements = 1 !! Number of isotopes considered
188	INTEGER(i_std), PARAMETER :: icarbon = 1 !! Index for carbon
189	!
190	!! Indices used for analytical spin-up
191	INTEGER(i_std), PARAMETER :: nbpools = 7 !! Total number of carbon pools (unitless)
192	INTEGER(i_std), PARAMETER :: istructural_above = 1 !! Index for structural litter above (unitless)
193	INTEGER(i_std), PARAMETER :: istructural_below = 2 !! Index for structural litter below (unitless)
194	INTEGER(i_std), PARAMETER :: imetabolic_above = 3 !! Index for metabolic litter above (unitless)
195	INTEGER(i_std), PARAMETER :: imetabolic_below = 4 !! Index for metabolic litter below (unitless)
196	INTEGER(i_std), PARAMETER :: iactive_pool = 5 !! Index for active carbon pool (unitless)
197	INTEGER(i_std), PARAMETER :: islow_pool = 6 !! Index for slow carbon pool (unitless)
198	INTEGER(i_std), PARAMETER :: ipassive_pool = 7 !! Index for passive carbon pool (unitless)
199
200
201	!
202	! NUMERICAL AND PHYSICS CONSTANTS
203	!
204	!
205
206	!-
207	! 1. Mathematical and numerical constants
208	!-
209	REAL(r_std), PARAMETER :: pi = 3.141592653589793238 !! pi souce : http://mathworld.wolfram.com/Pi.html (unitless)
210	REAL(r_std), PARAMETER :: euler = 2.71828182845904523 !! e source : http://mathworld.wolfram.com/e.html (unitless)
211	REAL(r_std), PARAMETER :: zero = 0._r_std !! Numerical constant set to 0 (unitless)
212	REAL(r_std), PARAMETER :: undemi = 0.5_r_std !! Numerical constant set to 1/2 (unitless)
213	REAL(r_std), PARAMETER :: un = 1._r_std !! Numerical constant set to 1 (unitless)
214	REAL(r_std), PARAMETER :: moins_un = -1._r_std !! Numerical constant set to -1 (unitless)
215	REAL(r_std), PARAMETER :: deux = 2._r_std !! Numerical constant set to 2 (unitless)
216	REAL(r_std), PARAMETER :: trois = 3._r_std !! Numerical constant set to 3 (unitless)
217	REAL(r_std), PARAMETER :: quatre = 4._r_std !! Numerical constant set to 4 (unitless)
218	REAL(r_std), PARAMETER :: cinq = 5._r_std !![DISPENSABLE] Numerical constant set to 5 (unitless)
219	REAL(r_std), PARAMETER :: six = 6._r_std !![DISPENSABLE] Numerical constant set to 6 (unitless)
220	REAL(r_std), PARAMETER :: huit = 8._r_std !! Numerical constant set to 8 (unitless)
221	REAL(r_std), PARAMETER :: mille = 1000._r_std !! Numerical constant set to 1000 (unitless)
222
223	!-
224	! 2 . Physics
225	!-
226	REAL(r_std), PARAMETER :: R_Earth = 6378000. !! radius of the Earth : Earth radius ~= Equatorial radius (m)
227	REAL(r_std), PARAMETER :: mincos = 0.0001 !! Minimum cosine value used for interpolation (unitless)
228	REAL(r_std), PARAMETER :: pb_std = 1013. !! standard pressure (hPa)
229	REAL(r_std), PARAMETER :: ZeroCelsius = 273.15 !! 0 degre Celsius in degre Kelvin (K)
230	REAL(r_std), PARAMETER :: tp_00 = 273.15 !! 0 degre Celsius in degre Kelvin (K)
231	REAL(r_std), PARAMETER :: chalsu0 = 2.8345E06 !! Latent heat of sublimation (J.kg^{-1})
232	REAL(r_std), PARAMETER :: chalev0 = 2.5008E06 !! Latent heat of evaporation (J.kg^{-1})
233	REAL(r_std), PARAMETER :: chalfu0 = chalsu0-chalev0 !! Latent heat of fusion (J.kg^{-1})
234	REAL(r_std), PARAMETER :: c_stefan = 5.6697E-8 !! Stefan-Boltzman constant (W.m^{-2}.K^{-4})
235	REAL(r_std), PARAMETER :: cp_air = 1004.675 !! Specific heat of dry air (J.kg^{-1}.K^{-1})
236	REAL(r_std), PARAMETER :: cte_molr = 287.05 !! Specific constant of dry air (kg.mol^{-1})
237	REAL(r_std), PARAMETER :: kappa = cte_molr/cp_air !! Kappa : ratio between specific constant and specific heat
238	!! of dry air (unitless)
239	REAL(r_std), PARAMETER :: msmlr_air = 28.964E-03 !! Molecular weight of dry air (kg.mol^{-1})
240	REAL(r_std), PARAMETER :: msmlr_h2o = 18.02E-03 !! Molecular weight of water vapor (kg.mol^{-1})
241	REAL(r_std), PARAMETER :: cp_h2o = & !! Specific heat of water vapor (J.kg^{-1}.K^{-1})
242	& cp_air(quatremsmlr_air)/( 3.5_r_std*msmlr_h2o)
243	REAL(r_std), PARAMETER :: cte_molr_h2o = cte_molr/quatre !! Specific constant of water vapor (J.kg^{-1}.K^{-1})
244	REAL(r_std), PARAMETER :: retv = msmlr_air/msmlr_h2o-un !! Ratio between molecular weight of dry air and water
245	!! vapor minus 1(unitless)
246	REAL(r_std), PARAMETER :: rvtmp2 = cp_h2o/cp_air-un !! Ratio between specific heat of water vapor and dry air
247	!! minus 1 (unitless)
248	REAL(r_std), PARAMETER :: cepdu2 = (0.1_r_std)**2 !! Squared wind shear (m^2.s^{-2})
249	REAL(r_std), PARAMETER :: ct_karman = 0.41_r_std !! Van Karmann Constant (unitless)
250	REAL(r_std), PARAMETER :: cte_grav = 9.80665_r_std !! Acceleration of the gravity (m.s^{-2})
251	REAL(r_std), PARAMETER :: pa_par_hpa = 100._r_std !! Transform pascal into hectopascal (unitless)
252	REAL(r_std), PARAMETER :: RR = 8.314 !! Ideal gas constant (J.mol^{-1}.K^{-1})
253	REAL(r_std), PARAMETER :: Sct = 1370. !! Solar constant (W.m^{-2})
254
255
256	!-
257	! 3. Climatic constants
258	!-
259	!! Constantes of the Louis scheme
260	REAL(r_std), SAVE :: cb = 5._r_std !! Constant of the Louis scheme (unitless);
261	!! reference to Louis (1979)
262	!$OMP THREADPRIVATE(cb)
263	REAL(r_std), SAVE :: cc = 5._r_std !! Constant of the Louis scheme (unitless);
264	!! reference to Louis (1979)
265	!$OMP THREADPRIVATE(cc)
266	REAL(r_std), SAVE :: cd = 5._r_std !! Constant of the Louis scheme (unitless);
267	!! reference to Louis (1979)
268	!$OMP THREADPRIVATE(cd)
269	REAL(r_std), SAVE :: rayt_cste = 125. !! Constant in the computation of surface resistance (W.m^{-2})
270	!$OMP THREADPRIVATE(rayt_cste)
271	REAL(r_std), SAVE :: defc_plus = 23.E-3 !! Constant in the computation of surface resistance (K.W^{-1})
272	!$OMP THREADPRIVATE(defc_plus)
273	REAL(r_std), SAVE :: defc_mult = 1.5 !! Constant in the computation of surface resistance (K.W^{-1})
274	!$OMP THREADPRIVATE(defc_mult)
275
276	!-
277	! 4. Soil thermodynamics constants
278	!-
279	! Look at constantes_soil.f90
280
281
282	!
283	! OPTIONAL PARTS OF THE MODEL
284	!
285	LOGICAL,PARAMETER :: diag_qsat = .TRUE. !! One of the most frequent problems is a temperature out of range
286	!! we provide here a way to catch that in the calling procedure.
287	!! (from Jan Polcher)(true/false)
288	LOGICAL, SAVE :: almaoutput =.FALSE. !! Selects the type of output for the model.(true/false)
289	!! Value is read from run.def in intersurf_history
290	!$OMP THREADPRIVATE(almaoutput)
291
292	!
293	! DIVERSE
294	!
295	CHARACTER(LEN=100), SAVE :: stomate_forcing_name='NONE' !! NV080800 Name of STOMATE forcing file (unitless)
296	! Compatibility with Nicolas Viovy driver.
297	!$OMP THREADPRIVATE(stomate_forcing_name)
298	CHARACTER(LEN=100), SAVE :: stomate_Cforcing_name='NONE' !! NV080800 Name of soil forcing file (unitless)
299	! Compatibility with Nicolas Viovy driver.
300	!$OMP THREADPRIVATE(stomate_Cforcing_name)
301	INTEGER(i_std), SAVE :: forcing_id !! Index of the forcing file (unitless)
302	!$OMP THREADPRIVATE(forcing_id)
303	LOGICAL, SAVE :: allow_forcing_write=.TRUE. !! Allow writing of stomate_forcing file.
304	!! This variable will be set to false for teststomate.
305
306
307
308	!------------------------!
309	! SECHIBA PARAMETERS !
310	!------------------------!
311
312
313	!
314	! GLOBAL PARAMETERS
315	!
316	REAL(r_std), SAVE :: min_wind = 0.1 !! The minimum wind (m.s^{-1})
317	!$OMP THREADPRIVATE(min_wind)
318	REAL(r_std), SAVE :: snowcri = 1.5 !! Sets the amount above which only sublimation occures (kg.m^{-2})
319	!$OMP THREADPRIVATE(snowcri)
320
321
322	!
323	! FLAGS ACTIVATING SUB-MODELS
324	!
325	LOGICAL, SAVE :: treat_expansion = .FALSE. !! Do we treat PFT expansion across a grid point after introduction? (true/false)
326	!$OMP THREADPRIVATE(treat_expansion)
327	LOGICAL, SAVE :: ok_herbivores = .FALSE. !! flag to activate herbivores (true/false)
328	!$OMP THREADPRIVATE(ok_herbivores)
329	LOGICAL, SAVE :: harvest_agri = .TRUE. !! flag to harvest aboveground biomass from agricultural PFTs)(true/false)
330	!$OMP THREADPRIVATE(harvest_agri)
331	LOGICAL, SAVE :: lpj_gap_const_mort !! constant moratlity (true/false). Default value depend on OK_DGVM.
332	!$OMP THREADPRIVATE(lpj_gap_const_mort)
333	LOGICAL, SAVE :: disable_fire = .FALSE. !! flag that disable fire (true/false)
334	!$OMP THREADPRIVATE(disable_fire)
335	LOGICAL, SAVE :: spinup_analytic = .FALSE. !! Flag to activate analytical resolution for spinup (true/false)
336	!$OMP THREADPRIVATE(spinup_analytic)
337	LOGICAL, SAVE :: ok_explicitsnow !! Flag to activate explicit snow scheme instead of default snow scheme
338	!$OMP THREADPRIVATE(ok_explicitsnow)
339
340	!
341	! CONFIGURATION VEGETATION
342	!
343	LOGICAL, SAVE :: agriculture = .TRUE. !! allow agricultural PFTs (true/false)
344	!$OMP THREADPRIVATE(agriculture)
345	LOGICAL, SAVE :: impveg = .FALSE. !! Impose vegetation ? (true/false)
346	!$OMP THREADPRIVATE(impveg)
347	LOGICAL, SAVE :: impsoilt = .FALSE. !! Impose soil ? (true/false)
348	!$OMP THREADPRIVATE(impsoilt)
349	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
350	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
351	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
352	!$OMP THREADPRIVATE(done_stomate_lcchange)
353	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
354	!$OMP THREADPRIVATE(read_lai)
355	LOGICAL, SAVE :: map_pft_format = .TRUE. !! Read a land use vegetation map on PFT format (true/false)
356	!$OMP THREADPRIVATE(map_pft_format)
357	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
358	!$OMP THREADPRIVATE(veget_reinit)
359
360	!
361	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
362	!
363	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
364	!$OMP THREADPRIVATE(max_snow_age)
365	REAL(r_std), SAVE :: snow_trans = 0.2_r_std !! Transformation time constant for snow (m), reduced from the value 0.3 (04/07/2016)
366	!$OMP THREADPRIVATE(snow_trans)
367	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
368	!$OMP THREADPRIVATE(sneige)
369	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
370	!$OMP THREADPRIVATE(maxmass_snow)
371
372	!! Heat capacity
373	REAL(r_std), PARAMETER :: capa_ice = 2.228*1.E3 !! Heat capacity of ice (J/kg/K)
374	REAL(r_std), SAVE :: so_capa_ice !! Heat capacity of saturated frozen soil (J/K/m3)
375	!$OMP THREADPRIVATE(so_capa_ice)
376	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
377	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
378
379	!! Thermal conductivities
380	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
381	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
382	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
383
384	!! Time constant of long-term soil humidity (s)
385	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
386
387	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
388	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
389	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
390	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
391	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
392	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
393	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
394	REAL(r_std), PARAMETER :: thick_min_snow = .01
395
396	!! The maximum snow density and water holding characterisicts
397	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
398	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
399	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
400	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
401	REAL(r_std), SAVE :: xrhosmin = 50.
402	REAL(r_std), PARAMETER :: xci = 2.106e+3
403	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
404
405	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
406	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
407
408	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
409	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
410
411	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
412	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
413	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
414	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
415
416	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
417
418	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
419	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
420	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
421
422	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
423
424	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
425	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
426	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
427	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
428
429	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
430	! (sig only for new snow OR high altitudes)
431	! from Sun et al. (1999): based on data from Jordan (1991)
432	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
433	!
434	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
435	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
436	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
437
438	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
439	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
440	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
441	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
442
443	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
444	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
445	REAL(r_std), PARAMETER :: XP00 = 1.E5
446
447	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
448	! (sig only for new snow OR high altitudes)
449	! from Sun et al. (1999): based on data from Jordan (1991)
450	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
451	!
452	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
453	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s)
454	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
455	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
456	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
457	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
458	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
459
460	!
461	! BVOC : Biogenic activity for each age class
462	!
463	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
464	!! age class : isoprene (unitless)
465	!$OMP THREADPRIVATE(iso_activity)
466	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
467	!! age class : methanol (unnitless)
468	!$OMP THREADPRIVATE(methanol_activity)
469
470	!
471	! condveg.f90
472	!
473
474	! 1. Scalar
475
476	! 1.1 Flags used inside the module
477
478	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
479	!! albedo (see header of subroutine)
480	!! (true/false)
481	!$OMP THREADPRIVATE(alb_bare_model)
482	LOGICAL, SAVE :: alb_bg_modis = .FALSE. !! Switch for choosing values of bare soil
483	!! albedo read from file
484	!! (true/false)
485	!$OMP THREADPRIVATE(alb_bg_modis)
486	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
487	!! (see header of subroutine).
488	!! (true/false)
489	!$OMP THREADPRIVATE(impaze)
490	LOGICAL, SAVE :: rough_dyn = .FALSE. !! Chooses between two methods to calculate the
491	!! the roughness height : static or dynamic (varying with LAI)
492	!! (true/false)
493	!$OMP THREADPRIVATE(rough_dyn)
494
495	! 1.2 Others
496
497
498	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
499	!! height from vegetation height (m)
500	!$OMP THREADPRIVATE(height_displacement)
501	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
502	!$OMP THREADPRIVATE(z0_bare)
503	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
504	!$OMP THREADPRIVATE(z0_ice)
505	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)
506	!$OMP THREADPRIVATE(tcst_snowa)
507	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
508	!$OMP THREADPRIVATE(snowcri_alb)
509	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
510	!$OMP THREADPRIVATE(fixed_snow_albedo)
511	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
512	!$OMP THREADPRIVATE(z0_scal)
513	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
514	!! displacement height (m) (imposed)
515	!$OMP THREADPRIVATE(roughheight_scal)
516	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
517	!$OMP THREADPRIVATE(emis_scal)
518
519	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
520	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
521	!! see Ershadi et al. (2015) for more info
522	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
523	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
524	!! see Ershadi et al. (2015) for more info
525	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
526	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
527	!! see Ershadi et al. (2015) for more info
528	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
529	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
530	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
531	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
532	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
533	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
534
535
536
537	! 2. Arrays
538
539	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
540	!$OMP THREADPRIVATE(alb_deadleaf)
541	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
542	!$OMP THREADPRIVATE(alb_ice)
543	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
544	!! used imposed (unitless)
545	!$OMP THREADPRIVATE(albedo_scal)
546	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
547	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
548	!! dry soil albedo values in visible range
549	!$OMP THREADPRIVATE(vis_dry)
550	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
551	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
552	!! dry soil albedo values in near-infrared range
553	!$OMP THREADPRIVATE(nir_dry)
554	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
555	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
556	!! wet soil albedo values in visible range
557	!$OMP THREADPRIVATE(vis_wet)
558	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
559	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
560	!! wet soil albedo values in near-infrared range
561	!$OMP THREADPRIVATE(nir_wet)
562	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
563	&0.18, 0.16, 0.16, 0.15, 0.12, 0.105, 0.09, 0.075, 0.25/) !! Soil albedo values to soil colour classification:
564	!! Averaged of wet and dry soil albedo values
565	!! in visible and near-infrared range
566	!$OMP THREADPRIVATE(albsoil_vis)
567	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
568	&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:
569	!! Averaged of wet and dry soil albedo values
570	!! in visible and near-infrared range
571	!$OMP THREADPRIVATE(albsoil_nir)
572
573	!
574	! diffuco.f90
575	!
576
577	! 0. Constants
578
579	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
580	!! of dry air (unitless)
581	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
582	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
583	REAL(r_std), PARAMETER :: mmol_to_m_1 = 0.0244 !!
584	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
585	REAL(r_std), PARAMETER :: W_to_mmol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
586
587	! 1. Scalar
588
589	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
590	!$OMP THREADPRIVATE(nlai)
591	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
592	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
593	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
594	!$OMP THREADPRIVATE(laimax)
595	LOGICAL, SAVE :: downregulation_co2 = .FALSE. !! Set to .TRUE. if you want CO2 downregulation.
596	!$OMP THREADPRIVATE(downregulation_co2)
597	REAL(r_std), SAVE :: downregulation_co2_baselevel = 280. !! CO2 base level (ppm)
598	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
599
600	! 3. Coefficients of equations
601
602	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
603	!$OMP THREADPRIVATE(lai_level_depth)
604	!
605	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
606	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
607	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
608	!
609	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
610	!$OMP THREADPRIVATE(Oi)
611	!
612	! slowproc.f90
613	!
614
615	! 1. Scalar
616
617	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
618	!$OMP THREADPRIVATE(veget_year_orig)
619	REAL(r_std), SAVE :: clayfraction_default = 0.2 !! Default value for clay fraction (0-1, unitless)
620	!$OMP THREADPRIVATE(clayfraction_default)
621	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
622	!$OMP THREADPRIVATE(min_vegfrac)
623	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
624	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
625
626	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
627	!$OMP THREADPRIVATE(stempdiag_bid)
628
629
630	!-----------------------------!
631	! STOMATE AND LPJ PARAMETERS !
632	!-----------------------------!
633
634
635	!
636	! lpj_constraints.f90
637	!
638
639	! 1. Scalar
640
641	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
642	!! regeneration (vernalization) (years)
643	!$OMP THREADPRIVATE(too_long)
644
645
646	!
647	! lpj_establish.f90
648	!
649
650	! 1. Scalar
651
652	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (0-1, unitless)
653	!$OMP THREADPRIVATE(estab_max_tree)
654	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (0-1, unitless)
655	!$OMP THREADPRIVATE(estab_max_grass)
656
657	! 3. Coefficients of equations
658
659	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
660	!$OMP THREADPRIVATE(establish_scal_fact)
661	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
662	!$OMP THREADPRIVATE(max_tree_coverage)
663	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
664	!$OMP THREADPRIVATE(ind_0_estab)
665
666
667	!
668	! lpj_fire.f90
669	!
670
671	! 1. Scalar
672
673	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
674	!$OMP THREADPRIVATE(tau_fire)
675	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
676	!! below which iginitions extinguish
677	!! @tex $(gC m^{-2})$ @endtex
678	!$OMP THREADPRIVATE(litter_crit)
679	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
680	!$OMP THREADPRIVATE(fire_resist_struct)
681	! 2. Arrays
682
683	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
684	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
685	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
686
687	! 3. Coefficients of equations
688
689	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
690	!$OMP THREADPRIVATE(bcfrac_coeff)
691	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
692	!$OMP THREADPRIVATE(firefrac_coeff)
693
694	!
695	! lpj_gap.f90
696	!
697
698	! 1. Scalar
699
700	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
701	!! @tex $(year^{-1})$ @endtex
702	!$OMP THREADPRIVATE(ref_greff)
703
704	!
705	! lpj_light.f90
706	!
707
708	! 1. Scalar
709
710	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
711	!! to fpc of last time step (F)? (true/false)
712	!$OMP THREADPRIVATE(annual_increase)
713	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
714	!! (due to its branches etc.) (0-1, unitless)
715	!! This means that only a small fraction of its crown area
716	!! can be invaded by other trees.
717	!$OMP THREADPRIVATE(min_cover)
718	!
719	! lpj_pftinout.f90
720	!
721
722	! 1. Scalar
723
724	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
725	!$OMP THREADPRIVATE(min_avail)
726	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
727	!$OMP THREADPRIVATE(ind_0)
728	! 3. Coefficients of equations
729
730	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
731	!$OMP THREADPRIVATE(RIP_time_min)
732	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
733	!$OMP THREADPRIVATE(npp_longterm_init)
734	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
735	!$OMP THREADPRIVATE(everywhere_init)
736
737
738	!
739	! stomate_alloc.f90
740	!
741
742	! 0. Constants
743
744	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
745	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
746	!gmjc
747	REAL(r_std), SAVE :: reserve_time_cut = 20.
748	REAL(r_std), SAVE :: lai_happy_cut = 0.25
749	REAL(r_std), SAVE :: tau_leafinit_cut = 10
750	REAL(r_std), SAVE :: tau_t2m_14 = 14.
751	!end gmjc
752	! 1. Scalar
753
754	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
755	!! we are severely stressed? (true/false)
756	!$OMP THREADPRIVATE(ok_minres)
757	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
758	!! carbohydrate reserve may be used for
759	!! trees (days)
760	!$OMP THREADPRIVATE(reserve_time_tree)
761	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
762	!! carbohydrate reserve may be used for
763	!! grasses (days)
764	!$OMP THREADPRIVATE(reserve_time_grass)
765
766	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
767	!$OMP THREADPRIVATE(f_fruit)
768	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
769	!! for grass (0-1, unitless)
770	!$OMP THREADPRIVATE(alloc_sap_above_grass)
771	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
772	!! allocation (0-1, unitless)
773	!$OMP THREADPRIVATE(min_LtoLSR)
774	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
775	!! allocation (0-1, unitless)
776	!$OMP THREADPRIVATE(max_LtoLSR)
777	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
778	!$OMP THREADPRIVATE(z_nitrogen)
779
780	! 3. Coefficients of equations
781
782	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
783	!$OMP THREADPRIVATE(Nlim_tref)
784
785
786	!
787	! stomate_data.f90
788	!
789
790	! 1. Scalar
791
792	! 1.1 Parameters for the pipe model
793
794	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
795	!$OMP THREADPRIVATE(pipe_tune1)
796	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
797	!$OMP THREADPRIVATE(pipe_tune2)
798	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
799	!$OMP THREADPRIVATE(pipe_tune3)
800	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
801	!$OMP THREADPRIVATE(pipe_tune4)
802	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
803	!$OMP THREADPRIVATE(pipe_density)
804	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
805	!$OMP THREADPRIVATE(pipe_k1)
806	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
807	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
808
809	! 1.2 climatic parameters
810
811	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
812	!$OMP THREADPRIVATE(precip_crit)
813	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
814	!$OMP THREADPRIVATE(gdd_crit_estab)
815	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
816	!$OMP THREADPRIVATE(fpc_crit)
817
818	! 1.3 sapling characteristics
819
820	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
821	!$OMP THREADPRIVATE(alpha_grass)
822	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
823	!$OMP THREADPRIVATE(alpha_tree)
824	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
825	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
826
827	! 1.4 time scales for phenology and other processes (in days)
828
829	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
830	!$OMP THREADPRIVATE(tau_hum_month)
831	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
832	!$OMP THREADPRIVATE(tau_hum_week)
833	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
834	!$OMP THREADPRIVATE(tau_t2m_month)
835	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
836	!$OMP THREADPRIVATE(tau_t2m_week)
837	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
838	!$OMP THREADPRIVATE(tau_tsoil_month)
839	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
840	!$OMP THREADPRIVATE(tau_soilhum_month)
841	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
842	!$OMP THREADPRIVATE(tau_gpp_week)
843	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
844	!$OMP THREADPRIVATE(tau_gdd)
845	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
846	!$OMP THREADPRIVATE(tau_ngd)
847	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
848	!$OMP THREADPRIVATE(coeff_tau_longterm)
849	REAL(r_std), SAVE :: tau_longterm_max !! (days)
850	!$OMP THREADPRIVATE(tau_longterm_max)
851
852	! 3. Coefficients of equations
853
854	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
855	!$OMP THREADPRIVATE(bm_sapl_carbres)
856	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
857	!$OMP THREADPRIVATE(bm_sapl_sapabove)
858	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
859	!$OMP THREADPRIVATE(bm_sapl_heartabove)
860	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
861	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
862	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
863	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
864	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
865	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
866	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
867	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
868	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
869	!$OMP THREADPRIVATE(init_sapl_mass_root)
870	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
871	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
872	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
873	!$OMP THREADPRIVATE(cn_sapl_init)
874	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
875	!$OMP THREADPRIVATE(migrate_tree)
876	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
877	!$OMP THREADPRIVATE(migrate_grass)
878	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
879	!$OMP THREADPRIVATE(lai_initmin_tree)
880	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
881	!$OMP THREADPRIVATE(lai_initmin_grass)
882	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
883	!$OMP THREADPRIVATE(dia_coeff)
884	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
885	!$OMP THREADPRIVATE(maxdia_coeff)
886	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
887	!$OMP THREADPRIVATE(bm_sapl_leaf)
888
889
890
891	!
892	! stomate_litter.f90
893	!
894
895	! 0. Constants
896
897	REAL(r_std), PARAMETER :: Q10 = 10. !!
898
899	! 1. Scalar
900
901	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
902	!$OMP THREADPRIVATE(z_decomp)
903
904	! 2. Arrays
905
906	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
907	!$OMP THREADPRIVATE(frac_soil_struct_aa)
908	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
909	!$OMP THREADPRIVATE(frac_soil_struct_ab)
910	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
911	!$OMP THREADPRIVATE(frac_soil_struct_sa)
912	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
913	!$OMP THREADPRIVATE(frac_soil_struct_sb)
914	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
915	!$OMP THREADPRIVATE(frac_soil_metab_aa)
916	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
917	!$OMP THREADPRIVATE(frac_soil_metab_ab)
918	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
919	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
920	!$OMP THREADPRIVATE(CN)
921	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
922	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
923	!$OMP THREADPRIVATE(LC)
924
925	! 3. Coefficients of equations
926
927	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
928	!$OMP THREADPRIVATE(metabolic_ref_frac)
929	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
930	!$OMP THREADPRIVATE(metabolic_LN_ratio)
931	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
932	!$OMP THREADPRIVATE(tau_metabolic)
933	REAL(r_std), SAVE :: tau_struct = 0.245 !!
934	!$OMP THREADPRIVATE(tau_struct)
935	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
936	!$OMP THREADPRIVATE(soil_Q10)
937	REAL(r_std), SAVE :: tsoil_ref = 30. !!
938	!$OMP THREADPRIVATE(tsoil_ref)
939	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
940	!$OMP THREADPRIVATE(litter_struct_coef)
941	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
942	!$OMP THREADPRIVATE(moist_coeff)
943	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
944	!$OMP THREADPRIVATE(moistcont_min)
945
946
947	!
948	! stomate_lpj.f90
949	!
950
951	! 1. Scalar
952
953	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
954	!$OMP THREADPRIVATE(frac_turnover_daily)
955
956
957	!
958	! stomate_npp.f90
959	!
960
961	! 1. Scalar
962
963	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
964	!! for maintenance respiration (0-1, unitless)
965	!$OMP THREADPRIVATE(tax_max)
966
967
968	!
969	! stomate_phenology.f90
970	!
971
972	! 1. Scalar
973
974	LOGICAL, SAVE :: always_init = .FALSE. !! take carbon from atmosphere if carbohydrate reserve too small? (true/false)
975	!$OMP THREADPRIVATE(always_init)
976	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
977	!$OMP THREADPRIVATE(min_growthinit_time)
978	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
979	!! - for trees (0-1, unitless)
980	!$OMP THREADPRIVATE(moiavail_always_tree)
981	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
982	!! - for grass (0-1, unitless)
983	!$OMP THREADPRIVATE(moiavail_always_grass)
984	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
985	!$OMP THREADPRIVATE(t_always)
986	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
987	!$OMP THREADPRIVATE(t_always_add)
988
989	! 3. Coefficients of equations
990
991	REAL(r_std), SAVE :: gddncd_ref = 603. !!
992	!$OMP THREADPRIVATE(gddncd_ref)
993	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
994	!$OMP THREADPRIVATE(gddncd_curve)
995	REAL(r_std), SAVE :: gddncd_offset = 64. !!
996	!$OMP THREADPRIVATE(gddncd_offset)
997
998
999	!
1000	! stomate_prescribe.f90
1001	!
1002
1003	! 3. Coefficients of equations
1004
1005	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1006	!$OMP THREADPRIVATE(bm_sapl_rescale)
1007
1008
1009	!
1010	! stomate_resp.f90
1011	!
1012
1013	! 3. Coefficients of equations
1014
1015	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1016	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1017	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1018	!$OMP THREADPRIVATE(maint_resp_coeff)
1019
1020
1021	!
1022	! stomate_soilcarbon.f90
1023	!
1024
1025	! 2. Arrays
1026
1027	! 2.1 frac_carb_coefficients
1028
1029	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1030	!! corresponding to frac_carb(:,iactive,ipassive)
1031	!$OMP THREADPRIVATE(frac_carb_ap)
1032	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1033	!! corresponding to frac_carb(:,islow,iactive)
1034	!$OMP THREADPRIVATE(frac_carb_sa)
1035	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1036	!! corresponding to frac_carb(:,islow,ipassive)
1037	!$OMP THREADPRIVATE(frac_carb_sp)
1038	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1039	!! corresponding to frac_carb(:,ipassive,iactive)
1040	!$OMP THREADPRIVATE(frac_carb_pa)
1041	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1042	!! corresponding to frac_carb(:,ipassive,islow)
1043	!$OMP THREADPRIVATE(frac_carb_ps)
1044
1045	! 3. Coefficients of equations
1046
1047	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1048	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1049	!! residence times in carbon pools (days)
1050	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1051	!$OMP THREADPRIVATE(carbon_tau_iactive)
1052	REAL(r_std), SAVE :: carbon_tau_islow = 5.48 !! residence times in slow pool (days)
1053	!$OMP THREADPRIVATE(carbon_tau_islow)
1054	REAL(r_std), SAVE :: carbon_tau_ipassive = 241. !! residence times in passive pool (days)
1055	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1056	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1057	!$OMP THREADPRIVATE(flux_tot_coeff)
1058
1059	!
1060	! stomate_turnover.f90
1061	!
1062
1063	! 3. Coefficients of equations
1064
1065	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1066	!$OMP THREADPRIVATE(new_turnover_time_ref)
1067	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1068	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1069	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1070	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1071
1072
1073	!
1074	! stomate_vmax.f90
1075	!
1076
1077	! 1. Scalar
1078
1079	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1080	!$OMP THREADPRIVATE(vmax_offset)
1081	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1082	!! reaches 1 (unitless)
1083	!$OMP THREADPRIVATE(leafage_firstmax)
1084	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1085	!! falls below 1 (unitless)
1086	!$OMP THREADPRIVATE(leafage_lastmax)
1087	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1088	!! reaches its minimum (vmax_offset)
1089	!! (unitless)
1090	!$OMP THREADPRIVATE(leafage_old)
1091	!
1092	! stomate_season.f90
1093	!
1094
1095	! 1. Scalar
1096
1097	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1098	!$OMP THREADPRIVATE(gppfrac_dormance)
1099	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1100	!$OMP THREADPRIVATE(tau_climatology)
1101	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1102	!$OMP THREADPRIVATE(hvc1)
1103	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1104	!$OMP THREADPRIVATE(hvc2)
1105	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1106	!$OMP THREADPRIVATE(leaf_frac_hvc)
1107	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1108	!$OMP THREADPRIVATE(tlong_ref_max)
1109	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1110	!$OMP THREADPRIVATE(tlong_ref_min)
1111
1112	! 3. Coefficients of equations
1113
1114	REAL(r_std), SAVE :: ncd_max_year = 3.
1115	!$OMP THREADPRIVATE(ncd_max_year)
1116	REAL(r_std), SAVE :: gdd_threshold = 5.
1117	!$OMP THREADPRIVATE(gdd_threshold)
1118	REAL(r_std), SAVE :: green_age_ever = 2.
1119	!$OMP THREADPRIVATE(green_age_ever)
1120	REAL(r_std), SAVE :: green_age_dec = 0.5
1121	!$OMP THREADPRIVATE(green_age_dec)
1122
1123	END MODULE constantes_var

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