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source: branches/ORCHIDEE_2_2/ORCHIDEE/src_parameters/constantes_var.f90 @ 7519

Last change on this file since 7519 was 7519, checked in by josefine.ghattas, 2 years ago
Correct comments and moved capa_ice as proposed by Catherine Ottle, see ticket #809
Property svn:keywords set to `Date Revision`
File size: 56.7 KB

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1	! =================================================================================================================================
2	! MODULE : constantes_var
3	!
4	! CONTACT : orchidee-help _at_ listes.ipsl.fr
5	!
6	! LICENCE : IPSL (2006)
7	! This software is governed by the CeCILL licence see ORCHIDEE/ORCHIDEE_CeCILL.LIC
8	!
9	!>\BRIEF constantes_var module contains most constantes like pi, Earth radius, etc...
10	!! and all externalized parameters except pft-dependent constants.
11	!!
12	!!\n DESCRIPTION: This module contains most constantes and the externalized parameters of ORCHIDEE which
13	!! are not pft-dependent.\n
14	!! In this module, you can set the flag diag_qsat in order to detect the pixel where the
15	!! temperature is out of range (look qsatcalc and dev_qsatcalc in qsat_moisture.f90).\n
16	!! The Earth radius is approximated by the Equatorial radius.The Earth's equatorial radius a,
17	!! or semi-major axis, is the distance from its center to the equator and equals 6,378.1370 km.
18	!! The equatorial radius is often used to compare Earth with other planets.\n
19	!! The meridional mean is well approximated by the semicubic mean of the two axe yielding
20	!! 6367.4491 km or less accurately by the quadratic mean of the two axes about 6,367.454 km
21	!! or even just the mean of the two axes about 6,367.445 km.\n
22	!! This module is already USE in module constantes. Therefor no need to USE it seperatly except
23	!! if the subroutines in module constantes are not needed.\n
24	!!
25	!! RECENT CHANGE(S):
26	!!
27	!! REFERENCE(S) :
28	!! - Louis, Jean-Francois (1979), A parametric model of vertical eddy fluxes in the atmosphere.
29	!! Boundary Layer Meteorology, 187-202.\n
30	!!
31	!! SVN :
32	!! $HeadURL: $
33	!! $Date$
34	!! $Revision$
35	!! \n
36	!_ ================================================================================================================================
37
38	MODULE constantes_var
39
40	USE defprec
41
42	IMPLICIT NONE
43	!-
44
45	!-----------------------!
46	! ORCHIDEE CONSTANTS !
47	!-----------------------!
48
49	!
50	! FLAGS
51	!
52	LOGICAL :: river_routing !! activate river routing
53	!$OMP THREADPRIVATE(river_routing)
54	LOGICAL, SAVE :: ok_nudge_mc !! Activate nudging of soil moisture
55	!$OMP THREADPRIVATE(ok_nudge_mc)
56	LOGICAL, SAVE :: ok_nudge_snow!! Activate nudging of snow variables
57	!$OMP THREADPRIVATE(ok_nudge_snow)
58	LOGICAL, SAVE :: nudge_interpol_with_xios !! Activate reading and interpolation with XIOS for nudging fields
59	!$OMP THREADPRIVATE(nudge_interpol_with_xios)
60	LOGICAL :: do_floodplains !! activate flood plains
61	!$OMP THREADPRIVATE(do_floodplains)
62	LOGICAL :: do_irrigation !! activate computation of irrigation flux
63	!$OMP THREADPRIVATE(do_irrigation)
64	LOGICAL :: ok_sechiba !! activate physic of the model
65	!$OMP THREADPRIVATE(ok_sechiba)
66	LOGICAL :: ok_stomate !! activate carbon cycle
67	!$OMP THREADPRIVATE(ok_stomate)
68	LOGICAL :: ok_dgvm !! activate dynamic vegetation
69	!$OMP THREADPRIVATE(ok_dgvm)
70	LOGICAL :: do_wood_harvest !! activate wood harvest
71	!$OMP THREADPRIVATE(do_wood_harvest)
72	LOGICAL :: ok_pheno !! activate the calculation of lai using stomate rather than a prescription
73	!$OMP THREADPRIVATE(ok_pheno)
74	LOGICAL :: ok_bvoc !! activate biogenic volatile organic coumpounds
75	!$OMP THREADPRIVATE(ok_bvoc)
76	LOGICAL :: ok_leafage !! activate leafage
77	!$OMP THREADPRIVATE(ok_leafage)
78	LOGICAL :: ok_radcanopy !! use canopy radiative transfer model
79	!$OMP THREADPRIVATE(ok_radcanopy)
80	LOGICAL :: ok_multilayer !! use canopy radiative transfer model with multi-layers
81	!$OMP THREADPRIVATE(ok_multilayer)
82	LOGICAL :: ok_pulse_NOx !! calculate NOx emissions with pulse
83	!$OMP THREADPRIVATE(ok_pulse_NOx)
84	LOGICAL :: ok_bbgfertil_NOx !! calculate NOx emissions with bbg fertilizing effect
85	!$OMP THREADPRIVATE(ok_bbgfertil_NOx)
86	LOGICAL :: ok_cropsfertil_NOx !! calculate NOx emissions with fertilizers use
87	!$OMP THREADPRIVATE(ok_cropsfertil_NOx)
88
89	LOGICAL :: ok_co2bvoc_poss !! CO2 inhibition on isoprene activated following Possell et al. (2005) model
90	!$OMP THREADPRIVATE(ok_co2bvoc_poss)
91	LOGICAL :: ok_co2bvoc_wilk !! CO2 inhibition on isoprene activated following Wilkinson et al. (2006) model
92	!$OMP THREADPRIVATE(ok_co2bvoc_wilk)
93
94	LOGICAL, SAVE :: OFF_LINE_MODE = .FALSE. !! ORCHIDEE detects if it is coupled with a GCM or
95	!! just use with one driver in OFF-LINE. (true/false)
96	!$OMP THREADPRIVATE(OFF_LINE_MODE)
97	LOGICAL, SAVE :: impose_param = .TRUE. !! Flag impos_param : read all the parameters in the run.def file
98	!$OMP THREADPRIVATE(impose_param)
99	CHARACTER(LEN=80), SAVE :: restname_in = 'NONE' !! Input Restart files name for Sechiba component
100	!$OMP THREADPRIVATE(restname_in)
101	CHARACTER(LEN=80), SAVE :: restname_out = 'sechiba_rest_out.nc' !! Output Restart files name for Sechiba component
102	!$OMP THREADPRIVATE(restname_out)
103	CHARACTER(LEN=80), SAVE :: stom_restname_in = 'NONE' !! Input Restart files name for Stomate component
104	!$OMP THREADPRIVATE(stom_restname_in)
105	CHARACTER(LEN=80), SAVE :: stom_restname_out = 'stomate_rest_out.nc' !! Output Restart files name for Stomate component
106	!$OMP THREADPRIVATE(stom_restname_out)
107	INTEGER, SAVE :: printlev=2 !! Standard level for text output [0, 1, 2, 3]
108	!$OMP THREADPRIVATE(printlev)
109
110	!
111	! TIME
112	!
113	INTEGER(i_std), PARAMETER :: spring_days_max = 40 !! Maximum number of days during which we watch for possible spring frost damage
114	!
115	! SPECIAL VALUES
116	!
117	INTEGER(i_std), PARAMETER :: undef_int = 999999999 !! undef integer for integer arrays (unitless)
118	!-
119	REAL(r_std), SAVE :: val_exp = 999999. !! Specific value if no restart value (unitless)
120	!$OMP THREADPRIVATE(val_exp)
121	REAL(r_std), PARAMETER :: undef = -9999. !! Special value for stomate (unitless)
122
123	REAL(r_std), PARAMETER :: min_sechiba = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
124	REAL(r_std), PARAMETER :: undef_sechiba = 1.E+20_r_std !! The undef value used in SECHIBA (unitless)
125
126	REAL(r_std), PARAMETER :: min_stomate = 1.E-8_r_std !! Epsilon to detect a near zero floating point (unitless)
127	REAL(r_std), PARAMETER :: large_value = 1.E33_r_std !! some large value (for stomate) (unitless)
128
129	REAL(r_std), SAVE :: alpha_nudge_mc !! Nudging constant for soil moisture
130	!$OMP THREADPRIVATE(alpha_nudge_mc)
131	REAL(r_std), SAVE :: alpha_nudge_snow !! Nudging constant for snow variables
132	!$OMP THREADPRIVATE(alpha_nudge_snow)
133
134	!
135	! DIMENSIONING AND INDICES PARAMETERS
136	!
137	INTEGER(i_std), PARAMETER :: ibare_sechiba = 1 !! Index for bare soil in Sechiba (unitless)
138	INTEGER(i_std), PARAMETER :: ivis = 1 !! index for albedo in visible range (unitless)
139	INTEGER(i_std), PARAMETER :: inir = 2 !! index for albeod i near-infrared range (unitless)
140	INTEGER(i_std), PARAMETER :: nnobio = 1 !! Number of other surface types: land ice (lakes,cities, ...) (unitless)
141	INTEGER(i_std), PARAMETER :: iice = 1 !! Index for land ice (see nnobio) (unitless)
142	!-
143	!! Soil
144	INTEGER(i_std), PARAMETER :: classnb = 9 !! Levels of soil colour classification (unitless)
145	!-
146	INTEGER(i_std), PARAMETER :: nleafages = 4 !! leaf age discretisation ( 1 = no discretisation )(unitless)
147	!-
148	!! litter fractions: indices (unitless)
149	INTEGER(i_std), PARAMETER :: ileaf = 1 !! Index for leaf compartment (unitless)
150	INTEGER(i_std), PARAMETER :: isapabove = 2 !! Index for sapwood above compartment (unitless)
151	INTEGER(i_std), PARAMETER :: isapbelow = 3 !! Index for sapwood below compartment (unitless)
152	INTEGER(i_std), PARAMETER :: iheartabove = 4 !! Index for heartwood above compartment (unitless)
153	INTEGER(i_std), PARAMETER :: iheartbelow = 5 !! Index for heartwood below compartment (unitless)
154	INTEGER(i_std), PARAMETER :: iroot = 6 !! Index for roots compartment (unitless)
155	INTEGER(i_std), PARAMETER :: ifruit = 7 !! Index for fruits compartment (unitless)
156	INTEGER(i_std), PARAMETER :: icarbres = 8 !! Index for reserve compartment (unitless)
157	INTEGER(i_std), PARAMETER :: nparts = 8 !! Number of biomass compartments (unitless)
158	!-
159	!! indices for assimilation parameters
160	INTEGER(i_std), PARAMETER :: ivcmax = 1 !! Index for vcmax (assimilation parameters) (unitless)
161	INTEGER(i_std), PARAMETER :: npco2 = 1 !! Number of assimilation parameters (unitless)
162	!-
163	!! trees and litter: indices for the parts of heart-
164	!! and sapwood above and below the ground
165	INTEGER(i_std), PARAMETER :: iabove = 1 !! Index for above part (unitless)
166	INTEGER(i_std), PARAMETER :: ibelow = 2 !! Index for below part (unitless)
167	INTEGER(i_std), PARAMETER :: nlevs = 2 !! Number of levels for trees and litter (unitless)
168	!-
169	!! litter: indices for metabolic and structural part
170	INTEGER(i_std), PARAMETER :: imetabolic = 1 !! Index for metabolic litter (unitless)
171	INTEGER(i_std), PARAMETER :: istructural = 2 !! Index for structural litter (unitless)
172	INTEGER(i_std), PARAMETER :: nlitt = 2 !! Number of levels for litter compartments (unitless)
173	!-
174	!! carbon pools: indices
175	INTEGER(i_std), PARAMETER :: iactive = 1 !! Index for active carbon pool (unitless)
176	INTEGER(i_std), PARAMETER :: islow = 2 !! Index for slow carbon pool (unitless)
177	INTEGER(i_std), PARAMETER :: ipassive = 3 !! Index for passive carbon pool (unitless)
178	INTEGER(i_std), PARAMETER :: ncarb = 3 !! Number of soil carbon pools (unitless)
179	!-
180	!! For isotopes and nitrogen
181	INTEGER(i_std), PARAMETER :: nelements = 1 !! Number of isotopes considered
182	INTEGER(i_std), PARAMETER :: icarbon = 1 !! Index for carbon
183	!
184	!! Indices used for analytical spin-up
185	INTEGER(i_std), PARAMETER :: nbpools = 7 !! Total number of carbon pools (unitless)
186	INTEGER(i_std), PARAMETER :: istructural_above = 1 !! Index for structural litter above (unitless)
187	INTEGER(i_std), PARAMETER :: istructural_below = 2 !! Index for structural litter below (unitless)
188	INTEGER(i_std), PARAMETER :: imetabolic_above = 3 !! Index for metabolic litter above (unitless)
189	INTEGER(i_std), PARAMETER :: imetabolic_below = 4 !! Index for metabolic litter below (unitless)
190	INTEGER(i_std), PARAMETER :: iactive_pool = 5 !! Index for active carbon pool (unitless)
191	INTEGER(i_std), PARAMETER :: islow_pool = 6 !! Index for slow carbon pool (unitless)
192	INTEGER(i_std), PARAMETER :: ipassive_pool = 7 !! Index for passive carbon pool (unitless)
193	!
194	!! Indicies used for output variables on Landuse tiles defined according to LUMIP project
195	!! Note that ORCHIDEE do not represent pasture and urban land. Therefor the variables will have
196	!! val_exp as missing value for these tiles.
197	INTEGER(i_std), PARAMETER :: nlut=4 !! Total number of landuse tiles according to LUMIP
198	INTEGER(i_std), PARAMETER :: id_psl=1 !! Index for primary and secondary land
199	INTEGER(i_std), PARAMETER :: id_crp=2 !! Index for crop land
200	INTEGER(i_std), PARAMETER :: id_pst=3 !! Index for pasture land
201	INTEGER(i_std), PARAMETER :: id_urb=4 !! Index for urban land
202
203
204	!
205	! NUMERICAL AND PHYSICS CONSTANTS
206	!
207	!
208
209	!-
210	! 1. Mathematical and numerical constants
211	!-
212	REAL(r_std), PARAMETER :: pi = 3.141592653589793238 !! pi souce : http://mathworld.wolfram.com/Pi.html (unitless)
213	REAL(r_std), PARAMETER :: euler = 2.71828182845904523 !! e source : http://mathworld.wolfram.com/e.html (unitless)
214	REAL(r_std), PARAMETER :: zero = 0._r_std !! Numerical constant set to 0 (unitless)
215	REAL(r_std), PARAMETER :: undemi = 0.5_r_std !! Numerical constant set to 1/2 (unitless)
216	REAL(r_std), PARAMETER :: un = 1._r_std !! Numerical constant set to 1 (unitless)
217	REAL(r_std), PARAMETER :: moins_un = -1._r_std !! Numerical constant set to -1 (unitless)
218	REAL(r_std), PARAMETER :: deux = 2._r_std !! Numerical constant set to 2 (unitless)
219	REAL(r_std), PARAMETER :: trois = 3._r_std !! Numerical constant set to 3 (unitless)
220	REAL(r_std), PARAMETER :: quatre = 4._r_std !! Numerical constant set to 4 (unitless)
221	REAL(r_std), PARAMETER :: cinq = 5._r_std !![DISPENSABLE] Numerical constant set to 5 (unitless)
222	REAL(r_std), PARAMETER :: six = 6._r_std !![DISPENSABLE] Numerical constant set to 6 (unitless)
223	REAL(r_std), PARAMETER :: huit = 8._r_std !! Numerical constant set to 8 (unitless)
224	REAL(r_std), PARAMETER :: mille = 1000._r_std !! Numerical constant set to 1000 (unitless)
225
226	!-
227	! 2 . Physics
228	!-
229	REAL(r_std), PARAMETER :: R_Earth = 6378000. !! radius of the Earth : Earth radius ~= Equatorial radius (m)
230	REAL(r_std), PARAMETER :: mincos = 0.0001 !! Minimum cosine value used for interpolation (unitless)
231	REAL(r_std), PARAMETER :: pb_std = 1013. !! standard pressure (hPa)
232	REAL(r_std), PARAMETER :: ZeroCelsius = 273.15 !! 0 degre Celsius in degre Kelvin (K)
233	REAL(r_std), PARAMETER :: tp_00 = 273.15 !! 0 degre Celsius in degre Kelvin (K)
234	REAL(r_std), PARAMETER :: chalsu0 = 2.8345E06 !! Latent heat of sublimation (J.kg^{-1})
235	REAL(r_std), PARAMETER :: chalev0 = 2.5008E06 !! Latent heat of evaporation (J.kg^{-1})
236	REAL(r_std), PARAMETER :: chalfu0 = chalsu0-chalev0 !! Latent heat of fusion (J.kg^{-1})
237	REAL(r_std), PARAMETER :: c_stefan = 5.6697E-8 !! Stefan-Boltzman constant (W.m^{-2}.K^{-4})
238	REAL(r_std), PARAMETER :: cp_air = 1004.675 !! Specific heat of dry air (J.kg^{-1}.K^{-1})
239	REAL(r_std), PARAMETER :: cte_molr = 287.05 !! Specific constant of dry air (kg.mol^{-1})
240	REAL(r_std), PARAMETER :: kappa = cte_molr/cp_air !! Kappa : ratio between specific constant and specific heat
241	!! of dry air (unitless)
242	REAL(r_std), PARAMETER :: msmlr_air = 28.964E-03 !! Molecular weight of dry air (kg.mol^{-1})
243	REAL(r_std), PARAMETER :: msmlr_h2o = 18.02E-03 !! Molecular weight of water vapor (kg.mol^{-1})
244	REAL(r_std), PARAMETER :: cp_h2o = & !! Specific heat of water vapor (J.kg^{-1}.K^{-1})
245	& cp_air(quatremsmlr_air)/( 3.5_r_std*msmlr_h2o)
246	REAL(r_std), PARAMETER :: cte_molr_h2o = cte_molr/quatre !! Specific constant of water vapor (J.kg^{-1}.K^{-1})
247	REAL(r_std), PARAMETER :: retv = msmlr_air/msmlr_h2o-un !! Ratio between molecular weight of dry air and water
248	!! vapor minus 1(unitless)
249	REAL(r_std), PARAMETER :: rvtmp2 = cp_h2o/cp_air-un !! Ratio between specific heat of water vapor and dry air
250	!! minus 1 (unitless)
251	REAL(r_std), PARAMETER :: cepdu2 = (0.1_r_std)**2 !! Squared wind shear (m^2.s^{-2})
252	REAL(r_std), PARAMETER :: ct_karman = 0.41_r_std !! Van Karmann Constant (unitless)
253	REAL(r_std), PARAMETER :: cte_grav = 9.80665_r_std !! Acceleration of the gravity (m.s^{-2})
254	REAL(r_std), PARAMETER :: pa_par_hpa = 100._r_std !! Transform pascal into hectopascal (unitless)
255	REAL(r_std), PARAMETER :: RR = 8.314 !! Ideal gas constant (J.mol^{-1}.K^{-1})
256	REAL(r_std), PARAMETER :: Sct = 1370. !! Solar constant (W.m^{-2})
257
258
259	INTEGER(i_std), SAVE :: testpft = 6
260	!$OMP THREADPRIVATE(testpft)
261	!-
262	! 3. Climatic constants
263	!-
264	!! Constantes of the Louis scheme
265	REAL(r_std), SAVE :: cb = 5._r_std !! Constant of the Louis scheme (unitless);
266	!! reference to Louis (1979)
267	!$OMP THREADPRIVATE(cb)
268	REAL(r_std), SAVE :: cc = 5._r_std !! Constant of the Louis scheme (unitless);
269	!! reference to Louis (1979)
270	!$OMP THREADPRIVATE(cc)
271	REAL(r_std), SAVE :: cd = 5._r_std !! Constant of the Louis scheme (unitless);
272	!! reference to Louis (1979)
273	!$OMP THREADPRIVATE(cd)
274	REAL(r_std), SAVE :: rayt_cste = 125. !! Constant in the computation of surface resistance (W.m^{-2})
275	!$OMP THREADPRIVATE(rayt_cste)
276	REAL(r_std), SAVE :: defc_plus = 23.E-3 !! Constant in the computation of surface resistance (K.W^{-1})
277	!$OMP THREADPRIVATE(defc_plus)
278	REAL(r_std), SAVE :: defc_mult = 1.5 !! Constant in the computation of surface resistance (K.W^{-1})
279	!$OMP THREADPRIVATE(defc_mult)
280
281	!-
282	! 4. Soil thermodynamics constants
283	!-
284	! Look at constantes_soil.f90
285
286
287	!
288	! OPTIONAL PARTS OF THE MODEL
289	!
290	LOGICAL,PARAMETER :: diag_qsat = .TRUE. !! One of the most frequent problems is a temperature out of range
291	!! we provide here a way to catch that in the calling procedure.
292	!! (from Jan Polcher)(true/false)
293	LOGICAL, SAVE :: almaoutput =.FALSE. !! Selects the type of output for the model.(true/false)
294	!! Value is read from run.def in intersurf_history
295	!$OMP THREADPRIVATE(almaoutput)
296
297	!
298	! DIVERSE
299	!
300	CHARACTER(LEN=100), SAVE :: stomate_forcing_name='NONE' !! NV080800 Name of STOMATE forcing file (unitless)
301	! Compatibility with Nicolas Viovy driver.
302	!$OMP THREADPRIVATE(stomate_forcing_name)
303	CHARACTER(LEN=100), SAVE :: stomate_Cforcing_name='NONE' !! NV080800 Name of soil forcing file (unitless)
304	! Compatibility with Nicolas Viovy driver.
305	!$OMP THREADPRIVATE(stomate_Cforcing_name)
306	INTEGER(i_std), SAVE :: forcing_id !! Index of the forcing file (unitless)
307	!$OMP THREADPRIVATE(forcing_id)
308	LOGICAL, SAVE :: allow_forcing_write=.TRUE. !! Allow writing of stomate_forcing file.
309	!! This variable will be set to false for teststomate.
310	!$OMP THREADPRIVATE(allow_forcing_write)
311
312
313
314	!------------------------!
315	! SECHIBA PARAMETERS !
316	!------------------------!
317
318
319	!
320	! GLOBAL PARAMETERS
321	!
322	REAL(r_std), SAVE :: min_wind = 0.1 !! The minimum wind (m.s^{-1})
323	!$OMP THREADPRIVATE(min_wind)
324	REAL(r_std), PARAMETER :: min_qc = 1.e-4 !! The minimum value for qc (qc=drag*wind) used in coupled(enerbil) and forced mode (enerbil and diffuco)
325	REAL(r_std), SAVE :: snowcri = 1.5 !! Sets the amount above which only sublimation occures (kg.m^{-2})
326	!$OMP THREADPRIVATE(snowcri)
327
328
329	!
330	! FLAGS ACTIVATING SUB-MODELS
331	!
332	LOGICAL, SAVE :: treat_expansion = .FALSE. !! Do we treat PFT expansion across a grid point after introduction? (true/false)
333	!$OMP THREADPRIVATE(treat_expansion)
334	LOGICAL, SAVE :: ok_herbivores = .FALSE. !! flag to activate herbivores (true/false)
335	!$OMP THREADPRIVATE(ok_herbivores)
336	LOGICAL, SAVE :: harvest_agri = .TRUE. !! flag to harvest aboveground biomass from agricultural PFTs)(true/false)
337	!$OMP THREADPRIVATE(harvest_agri)
338	LOGICAL, SAVE :: lpj_gap_const_mort !! constant moratlity (true/false). Default value depend on OK_DGVM.
339	!$OMP THREADPRIVATE(lpj_gap_const_mort)
340	LOGICAL, SAVE :: disable_fire = .TRUE. !! flag that disable fire (true/false)
341	!$OMP THREADPRIVATE(disable_fire)
342	LOGICAL, SAVE :: spinup_analytic = .FALSE. !! Flag to activate analytical resolution for spinup (true/false)
343	!$OMP THREADPRIVATE(spinup_analytic)
344
345	!
346	! CONFIGURATION VEGETATION
347	!
348	LOGICAL, SAVE :: agriculture = .TRUE. !! allow agricultural PFTs (true/false)
349	!$OMP THREADPRIVATE(agriculture)
350	LOGICAL, SAVE :: impveg = .FALSE. !! Impose vegetation ? (true/false)
351	!$OMP THREADPRIVATE(impveg)
352	LOGICAL, SAVE :: impsoilt = .FALSE. !! Impose soil ? (true/false)
353	!$OMP THREADPRIVATE(impsoilt)
354	LOGICAL, SAVE :: do_now_stomate_lcchange = .FALSE. !! Time to call lcchange in stomate_lpj
355	!$OMP THREADPRIVATE(do_now_stomate_lcchange)
356	LOGICAL, SAVE :: do_now_stomate_woodharvest = .FALSE. !! Time to call woodharvest in stomate_lpj
357	!$OMP THREADPRIVATE(do_now_stomate_woodharvest)
358	LOGICAL, SAVE :: done_stomate_lcchange = .FALSE. !! If true, call lcchange in stomate_lpj has just been done.
359	!$OMP THREADPRIVATE(done_stomate_lcchange)
360	LOGICAL, SAVE :: read_lai = .FALSE. !! Flag to read a map of LAI if STOMATE is not activated (true/false)
361	!$OMP THREADPRIVATE(read_lai)
362	LOGICAL, SAVE :: veget_reinit = .TRUE. !! To change LAND USE file in a run. (true/false)
363	!$OMP THREADPRIVATE(veget_reinit)
364	LOGICAL, SAVE :: vegetmap_reset = .FALSE.!! Reset the vegetation map and reset carbon related variables
365	!$OMP THREADPRIVATE(vegetmap_reset)
366	INTEGER(i_std) , SAVE :: veget_update !! Update frequency in years for landuse (nb of years)
367	!$OMP THREADPRIVATE(veget_update)
368	!
369	! PARAMETERS USED BY BOTH HYDROLOGY MODELS
370	!
371	REAL(r_std), SAVE :: max_snow_age = 50._r_std !! Maximum period of snow aging (days)
372	!$OMP THREADPRIVATE(max_snow_age)
373	REAL(r_std), SAVE :: snow_trans = 0.2_r_std !! Transformation time constant for snow (m), reduced from the value 0.3 (04/07/2016)
374	!$OMP THREADPRIVATE(snow_trans)
375	REAL(r_std), SAVE :: sneige !! Lower limit of snow amount (kg.m^{-2})
376	!$OMP THREADPRIVATE(sneige)
377	REAL(r_std), SAVE :: maxmass_snow = 3000. !! The maximum mass of snow (kg.m^{-2})
378	!$OMP THREADPRIVATE(maxmass_snow)
379
380	!! Heat capacity
381	REAL(r_std), PARAMETER :: rho_water = 1000. !! Density of water (kg/m3)
382	REAL(r_std), PARAMETER :: rho_ice = 920. !! Density of ice (kg/m3)
383	REAL(r_std), PARAMETER :: rho_soil = 2700. !! Density of soil particles (kg/m3), value from Peters-Lidard et al. 1998
384
385	!! Thermal conductivities
386	REAL(r_std), PARAMETER :: cond_water = 0.6 !! Thermal conductivity of liquid water (W/m/K)
387	REAL(r_std), PARAMETER :: cond_ice = 2.2 !! Thermal conductivity of ice (W/m/K)
388	REAL(r_std), PARAMETER :: cond_solid = 2.32 !! Thermal conductivity of mineral soil particles (W/m/K)
389
390	!! Time constant of long-term soil humidity (s)
391	REAL(r_std), PARAMETER :: lhf = 0.3336*1.E6 !! Latent heat of fusion (J/kg)
392
393	INTEGER(i_std), PARAMETER :: nsnow=3 !! Number of levels in the snow for explicit snow scheme
394	REAL(r_std), PARAMETER :: XMD = 28.9644E-3
395	REAL(r_std), PARAMETER :: XBOLTZ = 1.380658E-23
396	REAL(r_std), PARAMETER :: XAVOGADRO = 6.0221367E+23
397	REAL(r_std), PARAMETER :: XRD = XAVOGADRO * XBOLTZ / XMD
398	REAL(r_std), PARAMETER :: XCPD = 7.* XRD /2.
399	REAL(r_std), PARAMETER :: phigeoth = 0.057 ! 0. DKtest
400	REAL(r_std), PARAMETER :: thick_min_snow = .01
401
402	!! The maximum snow density and water holding characterisicts
403	REAL(r_std), SAVE :: xrhosmax = 750. ! (kg m-3)
404	!$OMP THREADPRIVATE(xrhosmax)
405	REAL(r_std), SAVE :: xwsnowholdmax1 = 0.03 ! (-)
406	!$OMP THREADPRIVATE(xwsnowholdmax1)
407	REAL(r_std), SAVE :: xwsnowholdmax2 = 0.10 ! (-)
408	!$OMP THREADPRIVATE(xwsnowholdmax2)
409	REAL(r_std), SAVE :: xsnowrhohold = 200.0 ! (kg/m3)
410	!$OMP THREADPRIVATE(xsnowrhohold)
411	REAL(r_std), SAVE :: xrhosmin = 50.
412	!$OMP THREADPRIVATE(xrhosmin)
413	REAL(r_std), PARAMETER :: xci = 2.106e+3
414	REAL(r_std), PARAMETER :: xrv = 6.0221367e+23 * 1.380658e-23 /18.0153e-3
415
416	!! ISBA-ES Critical snow depth at which snow grid thicknesses constant
417	REAL(r_std), PARAMETER :: xsnowcritd = 0.03 ! (m)
418
419	!! The threshold of snow depth used for preventing numerical problem in thermal calculations
420	REAL(r_std), PARAMETER :: snowcritd_thermal = 0.01 ! (m)
421
422	!! ISBA-ES CROCUS (Pahaut 1976): snowfall density coefficients:
423	REAL(r_std), PARAMETER :: snowfall_a_sn = 109.0 !! (kg/m3)
424	REAL(r_std), PARAMETER :: snowfall_b_sn = 6.0 !! (kg/m3/K)
425	REAL(r_std), PARAMETER :: snowfall_c_sn = 26.0 !! [kg/(m7/2 s1/2)]
426
427	REAL(r_std), PARAMETER :: dgrain_new_max= 2.0e-4!! (m) : Maximum grain size of new snowfall
428
429	!! Used in explicitsnow to prevent numerical problems as snow becomes vanishingly thin.
430	REAL(r_std), PARAMETER :: psnowdzmin = .0001 ! m
431	REAL(r_std), PARAMETER :: xsnowdmin = .000001 ! m
432
433	REAL(r_std), PARAMETER :: ph2o = 1000. !! Water density [kg/m3]
434
435	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
436	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
437	REAL(r_std), SAVE :: ZSNOWTHRMCOND1 = 0.02 ! [W/m/K]
438	!$OMP THREADPRIVATE(ZSNOWTHRMCOND1)
439	REAL(r_std), SAVE :: ZSNOWTHRMCOND2 = 2.5E-6 ! [W m5/(kg2 K)]
440	!$OMP THREADPRIVATE(ZSNOWTHRMCOND2)
441
442	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
443	! (sig only for new snow OR high altitudes)
444	! from Sun et al. (1999): based on data from Jordan (1991)
445	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
446	!
447	REAL(r_std), SAVE :: ZSNOWTHRMCOND_AVAP = -0.06023 ! (W/m/K)
448	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_AVAP)
449	REAL(r_std), SAVE :: ZSNOWTHRMCOND_BVAP = -2.5425 ! (W/m)
450	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_BVAP)
451	REAL(r_std), SAVE :: ZSNOWTHRMCOND_CVAP = -289.99 ! (K)
452	!$OMP THREADPRIVATE(ZSNOWTHRMCOND_CVAP)
453
454	REAL(r_std),SAVE :: xansmax = 0.85 !! Maxmimum snow albedo
455	!$OMP THREADPRIVATE(xansmax)
456	REAL(r_std),SAVE :: xansmin = 0.50 !! Miniumum snow albedo
457	!$OMP THREADPRIVATE(xansmin)
458	REAL(r_std),SAVE :: xans_todry = 0.008 !! Albedo decay rate for dry snow
459	!$OMP THREADPRIVATE(xans_todry)
460	REAL(r_std),SAVE :: xans_t = 0.240 !! Albedo decay rate for wet snow
461	!$OMP THREADPRIVATE(xans_t)
462
463	! ISBA-ES Thermal conductivity coefficients from Anderson (1976):
464	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
465	REAL(r_std), PARAMETER :: XP00 = 1.E5
466
467	! ISBA-ES Thermal conductivity: Implicit vapor diffn effects
468	! (sig only for new snow OR high altitudes)
469	! from Sun et al. (1999): based on data from Jordan (1991)
470	! see Boone, Meteo-France/CNRM Note de Centre No. 70 (2002)
471	!
472	REAL(r_std), SAVE :: ZSNOWCMPCT_RHOD = 150.0 !! (kg/m3)
473	!$OMP THREADPRIVATE(ZSNOWCMPCT_RHOD)
474	REAL(r_std), SAVE :: ZSNOWCMPCT_ACM = 2.8e-6 !! (1/s
475	!$OMP THREADPRIVATE(ZSNOWCMPCT_ACM)
476	REAL(r_std), SAVE :: ZSNOWCMPCT_BCM = 0.04 !! (1/K)
477	!$OMP THREADPRIVATE(ZSNOWCMPCT_BCM)
478	REAL(r_std), SAVE :: ZSNOWCMPCT_CCM = 460. !! (m3/kg)
479	!$OMP THREADPRIVATE(ZSNOWCMPCT_CCM)
480	REAL(r_std), SAVE :: ZSNOWCMPCT_V0 = 3.7e7 !! (Pa/s)
481	!$OMP THREADPRIVATE(ZSNOWCMPCT_V0)
482	REAL(r_std), SAVE :: ZSNOWCMPCT_VT = 0.081 !! (1/K)
483	!$OMP THREADPRIVATE(ZSNOWCMPCT_VT)
484	REAL(r_std), SAVE :: ZSNOWCMPCT_VR = 0.018 !! (m3/kg)
485	!$OMP THREADPRIVATE(ZSNOWCMPCT_VR)
486
487	!
488	! BVOC : Biogenic activity for each age class
489	!
490	REAL(r_std), SAVE, DIMENSION(nleafages) :: iso_activity = (/0.5, 1.5, 1.5, 0.5/) !! Biogenic activity for each
491	!! age class : isoprene (unitless)
492	!$OMP THREADPRIVATE(iso_activity)
493	REAL(r_std), SAVE, DIMENSION(nleafages) :: methanol_activity = (/1., 1., 0.5, 0.5/) !! Biogenic activity for each
494	!! age class : methanol (unnitless)
495	!$OMP THREADPRIVATE(methanol_activity)
496
497	!
498	! condveg.f90
499	!
500
501	! 1. Scalar
502
503	! 1.1 Flags used inside the module
504
505	LOGICAL, SAVE :: alb_bare_model = .FALSE. !! Switch for choosing values of bare soil
506	!! albedo (see header of subroutine)
507	!! (true/false)
508	!$OMP THREADPRIVATE(alb_bare_model)
509	LOGICAL, SAVE :: alb_bg_modis = .TRUE. !! Switch for choosing values of bare soil
510	!! albedo read from file
511	!! (true/false)
512	!$OMP THREADPRIVATE(alb_bg_modis)
513	LOGICAL, SAVE :: impaze = .FALSE. !! Switch for choosing surface parameters
514	!! (see header of subroutine).
515	!! (true/false)
516	!$OMP THREADPRIVATE(impaze)
517	LOGICAL, SAVE :: rough_dyn = .TRUE. !! Chooses between two methods to calculate the
518	!! the roughness height : static or dynamic (varying with LAI)
519	!! (true/false)
520	!$OMP THREADPRIVATE(rough_dyn)
521
522	LOGICAL, SAVE :: new_watstress = .FALSE.
523	!$OMP THREADPRIVATE(new_watstress)
524
525	REAL(r_std), SAVE :: alpha_watstress = 1.
526	!$OMP THREADPRIVATE(alpha_watstress)
527
528	! 1.2 Others
529
530
531	REAL(r_std), SAVE :: height_displacement = 0.66 !! Factor to calculate the zero-plane displacement
532	!! height from vegetation height (m)
533	!$OMP THREADPRIVATE(height_displacement)
534	REAL(r_std), SAVE :: z0_bare = 0.01 !! bare soil roughness length (m)
535	!$OMP THREADPRIVATE(z0_bare)
536	REAL(r_std), SAVE :: z0_ice = 0.001 !! ice roughness length (m)
537	!$OMP THREADPRIVATE(z0_ice)
538	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)
539	!$OMP THREADPRIVATE(tcst_snowa)
540	REAL(r_std), SAVE :: snowcri_alb = 10. !! Critical value for computation of snow albedo (cm)
541	!$OMP THREADPRIVATE(snowcri_alb)
542	REAL(r_std), SAVE :: fixed_snow_albedo = undef_sechiba !! To choose a fixed snow albedo value (unitless)
543	!$OMP THREADPRIVATE(fixed_snow_albedo)
544	REAL(r_std), SAVE :: z0_scal = 0.15 !! Surface roughness height imposed (m)
545	!$OMP THREADPRIVATE(z0_scal)
546	REAL(r_std), SAVE :: roughheight_scal = zero !! Effective roughness Height depending on zero-plane
547	!! displacement height (m) (imposed)
548	!$OMP THREADPRIVATE(roughheight_scal)
549	REAL(r_std), SAVE :: emis_scal = 1.0 !! Surface emissivity imposed (unitless)
550	!$OMP THREADPRIVATE(emis_scal)
551
552	REAL(r_std), SAVE :: c1 = 0.32 !! Constant used in the formulation of the ratio of
553	!$OMP THREADPRIVATE(c1) !! friction velocity to the wind speed at the canopy top
554	!! see Ershadi et al. (2015) for more info
555	REAL(r_std), SAVE :: c2 = 0.264 !! Constant used in the formulation of the ratio of
556	!$OMP THREADPRIVATE(c2) !! friction velocity to the wind speed at the canopy top
557	!! see Ershadi et al. (2015) for more info
558	REAL(r_std), SAVE :: c3 = 15.1 !! Constant used in the formulation of the ratio of
559	!$OMP THREADPRIVATE(c3) !! friction velocity to the wind speed at the canopy top
560	!! see Ershadi et al. (2015) for more info
561	REAL(r_std), SAVE :: Cdrag_foliage = 0.2 !! Drag coefficient of the foliage
562	!$OMP THREADPRIVATE(Cdrag_foliage) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
563	REAL(r_std), SAVE :: Ct = 0.01 !! Heat transfer coefficient of the leaf
564	!$OMP THREADPRIVATE(Ct) !! See Ershadi et al. (2015) and Su et. al (2001) for more info
565	REAL(r_std), SAVE :: Prandtl = 0.71 !! Prandtl number used in the calculation of Ct_star
566	!$OMP THREADPRIVATE(Prandtl) !! See Su et. al (2001) for more info
567
568
569
570	! 2. Arrays
571
572	REAL(r_std), SAVE, DIMENSION(2) :: alb_deadleaf = (/ .12, .35/) !! albedo of dead leaves, VIS+NIR (unitless)
573	!$OMP THREADPRIVATE(alb_deadleaf)
574	REAL(r_std), SAVE, DIMENSION(2) :: alb_ice = (/ .60, .20/) !! albedo of ice, VIS+NIR (unitless)
575	!$OMP THREADPRIVATE(alb_ice)
576	REAL(r_std), SAVE, DIMENSION(2) :: albedo_scal = (/ 0.25, 0.25 /) !! Albedo values for visible and near-infrared
577	!! used imposed (unitless)
578	!$OMP THREADPRIVATE(albedo_scal)
579	REAL(r_std) , SAVE, DIMENSION(classnb) :: vis_dry = (/0.24,&
580	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.27/) !! Soil albedo values to soil colour classification:
581	!! dry soil albedo values in visible range
582	!$OMP THREADPRIVATE(vis_dry)
583	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_dry = (/0.48,&
584	&0.44, 0.40, 0.36, 0.32, 0.28, 0.24, 0.20, 0.55/) !! Soil albedo values to soil colour classification:
585	!! dry soil albedo values in near-infrared range
586	!$OMP THREADPRIVATE(nir_dry)
587	REAL(r_std), SAVE, DIMENSION(classnb) :: vis_wet = (/0.12,&
588	&0.11, 0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.15/) !! Soil albedo values to soil colour classification:
589	!! wet soil albedo values in visible range
590	!$OMP THREADPRIVATE(vis_wet)
591	REAL(r_std), SAVE, DIMENSION(classnb) :: nir_wet = (/0.24,&
592	&0.22, 0.20, 0.18, 0.16, 0.14, 0.12, 0.10, 0.31/) !! Soil albedo values to soil colour classification:
593	!! wet soil albedo values in near-infrared range
594	!$OMP THREADPRIVATE(nir_wet)
595	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_vis = (/ &
596	&0.18, 0.16, 0.16, 0.15, 0.12, 0.105, 0.09, 0.075, 0.25/) !! Soil albedo values to soil colour classification:
597	!! Averaged of wet and dry soil albedo values
598	!! in visible and near-infrared range
599	!$OMP THREADPRIVATE(albsoil_vis)
600	REAL(r_std), SAVE, DIMENSION(classnb) :: albsoil_nir = (/ &
601	&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:
602	!! Averaged of wet and dry soil albedo values
603	!! in visible and near-infrared range
604	!$OMP THREADPRIVATE(albsoil_nir)
605
606	!
607	! diffuco.f90
608	!
609
610	! 0. Constants
611
612	REAL(r_std), PARAMETER :: Tetens_1 = 0.622 !! Ratio between molecular weight of water vapor and molecular weight
613	!! of dry air (unitless)
614	REAL(r_std), PARAMETER :: Tetens_2 = 0.378 !!
615	REAL(r_std), PARAMETER :: ratio_H2O_to_CO2 = 1.6 !! Ratio of water vapor diffusivity to the CO2 diffusivity (unitless)
616	REAL(r_std), PARAMETER :: mol_to_m_1 = 0.0244 !!
617	REAL(r_std), PARAMETER :: RG_to_PAR = 0.5 !!
618	REAL(r_std), PARAMETER :: W_to_mol = 4.6 !! W_to_mmol * RG_to_PAR = 2.3
619
620	! 1. Scalar
621
622	INTEGER(i_std), SAVE :: nlai = 20 !! Number of LAI levels (unitless)
623	!$OMP THREADPRIVATE(nlai)
624	LOGICAL, SAVE :: ldq_cdrag_from_gcm = .FALSE. !! Set to .TRUE. if you want q_cdrag coming from GCM
625	!$OMP THREADPRIVATE(ldq_cdrag_from_gcm)
626	REAL(r_std), SAVE :: laimax = 12. !! Maximal LAI used for splitting LAI into N layers (m^2.m^{-2})
627	!$OMP THREADPRIVATE(laimax)
628	LOGICAL, SAVE :: downregulation_co2 = .TRUE. !! Set to .TRUE. if you want CO2 downregulation version used for CMIP6 6.1.0-6.1.10
629	!$OMP THREADPRIVATE(downregulation_co2)
630	LOGICAL, SAVE :: downregulation_co2_new = .FALSE. !! Set to .TRUE. if you want CO2 downregulation version revised for CMIP6 6.1.11
631	!$OMP THREADPRIVATE(downregulation_co2_new)
632	REAL(r_std), SAVE :: downregulation_co2_baselevel = 380. !! CO2 base level (ppm)
633	!$OMP THREADPRIVATE(downregulation_co2_baselevel)
634	REAL(r_std), SAVE :: downregulation_co2_minimum = 280. !! CO2 value above which downregulation is taken into account
635	!$OMP THREADPRIVATE(downregulation_co2_minimum)
636
637	REAL(r_std), SAVE :: gb_ref = 1./25. !! Leaf bulk boundary layer resistance (s m-1)
638	!$OMP THREADPRIVATE(gb_ref)
639
640	! 3. Coefficients of equations
641
642	REAL(r_std), SAVE :: lai_level_depth = 0.15 !!
643	!$OMP THREADPRIVATE(lai_level_depth)
644	!
645	REAL(r_std), SAVE, DIMENSION(6) :: dew_veg_poly_coeff = & !! coefficients of the 5 degree polynomomial used
646	& (/ 0.887773, 0.205673, 0.110112, 0.014843, 0.000824, 0.000017 /) !! in the equation of coeff_dew_veg
647	!$OMP THREADPRIVATE(dew_veg_poly_coeff)
648	!
649	REAL(r_std), SAVE :: Oi=210000. !! Intercellular oxygen partial pressure (ubar)
650	!$OMP THREADPRIVATE(Oi)
651	!
652	! slowproc.f90
653	!
654
655	! 1. Scalar
656
657	INTEGER(i_std), SAVE :: veget_year_orig = 0 !! first year for landuse (number)
658	!$OMP THREADPRIVATE(veget_year_orig)
659
660	REAL(r_std), SAVE :: min_vegfrac = 0.001 !! Minimal fraction of mesh a vegetation type can occupy (0-1, unitless)
661	!$OMP THREADPRIVATE(min_vegfrac)
662	REAL(r_std), SAVE :: frac_nobio_fixed_test_1 = 0.0 !! Value for frac_nobio for tests in 0-dim simulations (0-1, unitless)
663	!$OMP THREADPRIVATE(frac_nobio_fixed_test_1)
664
665	REAL(r_std), SAVE :: stempdiag_bid = 280. !! only needed for an initial LAI if there is no restart file
666	!$OMP THREADPRIVATE(stempdiag_bid)
667
668
669	!-----------------------------!
670	! STOMATE AND LPJ PARAMETERS !
671	!-----------------------------!
672
673
674	!
675	! lpj_constraints.f90
676	!
677
678	! 1. Scalar
679
680	REAL(r_std), SAVE :: too_long = 5. !! longest sustainable time without
681	!! regeneration (vernalization) (years)
682	!$OMP THREADPRIVATE(too_long)
683
684
685	!
686	! lpj_establish.f90
687	!
688
689	! 1. Scalar
690
691	REAL(r_std), SAVE :: estab_max_tree = 0.12 !! Maximum tree establishment rate (ind/m2/dt_stomate)
692	!$OMP THREADPRIVATE(estab_max_tree)
693	REAL(r_std), SAVE :: estab_max_grass = 0.12 !! Maximum grass establishment rate (ind/m2/dt_stomate)
694	!$OMP THREADPRIVATE(estab_max_grass)
695
696	! 3. Coefficients of equations
697
698	REAL(r_std), SAVE :: establish_scal_fact = 5. !!
699	!$OMP THREADPRIVATE(establish_scal_fact)
700	REAL(r_std), SAVE :: max_tree_coverage = 0.98 !! (0-1, unitless)
701	!$OMP THREADPRIVATE(max_tree_coverage)
702	REAL(r_std), SAVE :: ind_0_estab = 0.2 !! = ind_0 * 10.
703	!$OMP THREADPRIVATE(ind_0_estab)
704
705
706	!
707	! lpj_fire.f90
708	!
709
710	! 1. Scalar
711
712	REAL(r_std), SAVE :: tau_fire = 30. !! Time scale for memory of the fire index (days).
713	!$OMP THREADPRIVATE(tau_fire)
714	REAL(r_std), SAVE :: litter_crit = 200. !! Critical litter quantity for fire
715	!! below which iginitions extinguish
716	!! @tex $(gC m^{-2})$ @endtex
717	!$OMP THREADPRIVATE(litter_crit)
718	REAL(r_std), SAVE :: fire_resist_struct = 0.5 !!
719	!$OMP THREADPRIVATE(fire_resist_struct)
720	! 2. Arrays
721
722	REAL(r_std), SAVE, DIMENSION(nparts) :: co2frac = & !! The fraction of the different biomass
723	& (/ .95, .95, 0., 0.3, 0., 0., .95, .95 /) !! compartments emitted to the atmosphere
724	!$OMP THREADPRIVATE(co2frac) !! when burned (unitless, 0-1)
725
726	! 3. Coefficients of equations
727
728	REAL(r_std), SAVE, DIMENSION(3) :: bcfrac_coeff = (/ .3, 1.3, 88.2 /) !! (unitless)
729	!$OMP THREADPRIVATE(bcfrac_coeff)
730	REAL(r_std), SAVE, DIMENSION(4) :: firefrac_coeff = (/ 0.45, 0.8, 0.6, 0.13 /) !! (unitless)
731	!$OMP THREADPRIVATE(firefrac_coeff)
732
733	!
734	! lpj_gap.f90
735	!
736
737	! 1. Scalar
738
739	REAL(r_std), SAVE :: ref_greff = 0.035 !! Asymptotic maximum mortality rate
740	!! @tex $(year^{-1})$ @endtex
741	!$OMP THREADPRIVATE(ref_greff)
742
743	!
744	! lpj_light.f90
745	!
746
747	! 1. Scalar
748
749	LOGICAL, SAVE :: annual_increase = .TRUE. !! for diagnosis of fpc increase, compare today's fpc to last year's maximum (T) or
750	!! to fpc of last time step (F)? (true/false)
751	!$OMP THREADPRIVATE(annual_increase)
752	REAL(r_std), SAVE :: min_cover = 0.05 !! For trees, minimum fraction of crown area occupied
753	!! (due to its branches etc.) (0-1, unitless)
754	!! This means that only a small fraction of its crown area
755	!! can be invaded by other trees.
756	!$OMP THREADPRIVATE(min_cover)
757	!
758	! lpj_pftinout.f90
759	!
760
761	! 1. Scalar
762
763	REAL(r_std), SAVE :: min_avail = 0.01 !! minimum availability
764	!$OMP THREADPRIVATE(min_avail)
765	REAL(r_std), SAVE :: ind_0 = 0.02 !! initial density of individuals
766	!$OMP THREADPRIVATE(ind_0)
767	! 3. Coefficients of equations
768
769	REAL(r_std), SAVE :: RIP_time_min = 1.25 !! test whether the PFT has been eliminated lately (years)
770	!$OMP THREADPRIVATE(RIP_time_min)
771	REAL(r_std), SAVE :: npp_longterm_init = 10. !! Initialisation value for npp_longterm (gC.m^{-2}.year^{-1})
772	!$OMP THREADPRIVATE(npp_longterm_init)
773	REAL(r_std), SAVE :: everywhere_init = 0.05 !!
774	!$OMP THREADPRIVATE(everywhere_init)
775
776
777	!
778	! stomate_alloc.f90
779	!
780
781	! 0. Constants
782
783	REAL(r_std), PARAMETER :: max_possible_lai = 10. !! (m^2.m^{-2})
784	REAL(r_std), PARAMETER :: Nlim_Q10 = 10. !!
785
786	! 1. Scalar
787
788	LOGICAL, SAVE :: ok_minres = .TRUE. !! [DISPENSABLE] Do we try to reach a minimum reservoir even if
789	!! we are severely stressed? (true/false)
790	!$OMP THREADPRIVATE(ok_minres)
791	REAL(r_std), SAVE :: reserve_time_tree = 30. !! Maximum number of days during which
792	!! carbohydrate reserve may be used for
793	!! trees (days)
794	!$OMP THREADPRIVATE(reserve_time_tree)
795	REAL(r_std), SAVE :: reserve_time_grass = 20. !! Maximum number of days during which
796	!! carbohydrate reserve may be used for
797	!! grasses (days)
798	!$OMP THREADPRIVATE(reserve_time_grass)
799
800	REAL(r_std), SAVE :: f_fruit = 0.1 !! Default fruit allocation (0-1, unitless)
801	!$OMP THREADPRIVATE(f_fruit)
802	REAL(r_std), SAVE :: alloc_sap_above_grass = 1.0 !! fraction of sapwood allocation above ground
803	!! for grass (0-1, unitless)
804	!$OMP THREADPRIVATE(alloc_sap_above_grass)
805	REAL(r_std), SAVE :: min_LtoLSR = 0.2 !! Prescribed lower bounds for leaf
806	!! allocation (0-1, unitless)
807	!$OMP THREADPRIVATE(min_LtoLSR)
808	REAL(r_std), SAVE :: max_LtoLSR = 0.5 !! Prescribed upper bounds for leaf
809	!! allocation (0-1, unitless)
810	!$OMP THREADPRIVATE(max_LtoLSR)
811	REAL(r_std), SAVE :: z_nitrogen = 0.2 !! Curvature of the root profile (m)
812	!$OMP THREADPRIVATE(z_nitrogen)
813
814	! 3. Coefficients of equations
815
816	REAL(r_std), SAVE :: Nlim_tref = 25. !! (C)
817	!$OMP THREADPRIVATE(Nlim_tref)
818
819
820	!
821	! stomate_data.f90
822	!
823
824	! 1. Scalar
825
826	! 1.1 Parameters for the pipe model
827
828	REAL(r_std), SAVE :: pipe_tune1 = 100.0 !! crown area = pipe_tune1. stem diameter**(1.6) (Reinicke's theory) (unitless)
829	!$OMP THREADPRIVATE(pipe_tune1)
830	REAL(r_std), SAVE :: pipe_tune2 = 40.0 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
831	!$OMP THREADPRIVATE(pipe_tune2)
832	REAL(r_std), SAVE :: pipe_tune3 = 0.5 !! height=pipe_tune2 * diameter**pipe_tune3 (unitless)
833	!$OMP THREADPRIVATE(pipe_tune3)
834	REAL(r_std), SAVE :: pipe_tune4 = 0.3 !! needed for stem diameter (unitless)
835	!$OMP THREADPRIVATE(pipe_tune4)
836	REAL(r_std), SAVE :: pipe_density = 2.e5 !! Density
837	!$OMP THREADPRIVATE(pipe_density)
838	REAL(r_std), SAVE :: pipe_k1 = 8.e3 !! one more SAVE
839	!$OMP THREADPRIVATE(pipe_k1)
840	REAL(r_std), SAVE :: pipe_tune_exp_coeff = 1.6 !! pipe tune exponential coeff (unitless)
841	!$OMP THREADPRIVATE(pipe_tune_exp_coeff)
842
843	! 1.2 climatic parameters
844
845	REAL(r_std), SAVE :: precip_crit = 100. !! minimum precip, in (mm/year)
846	!$OMP THREADPRIVATE(precip_crit)
847	REAL(r_std), SAVE :: gdd_crit_estab = 150. !! minimum gdd for establishment of saplings
848	!$OMP THREADPRIVATE(gdd_crit_estab)
849	REAL(r_std), SAVE :: fpc_crit = 0.95 !! critical fpc, needed for light competition and establishment (0-1, unitless)
850	!$OMP THREADPRIVATE(fpc_crit)
851
852	! 1.3 sapling characteristics
853
854	REAL(r_std), SAVE :: alpha_grass = 0.5 !! alpha coefficient for grasses (unitless)
855	!$OMP THREADPRIVATE(alpha_grass)
856	REAL(r_std), SAVE :: alpha_tree = 1. !! alpha coefficient for trees (unitless)
857	!$OMP THREADPRIVATE(alpha_tree)
858	REAL(r_std), SAVE :: mass_ratio_heart_sap = 3. !! mass ratio (heartwood+sapwood)/sapwood (unitless)
859	!$OMP THREADPRIVATE(mass_ratio_heart_sap)
860
861	! 1.4 time scales for phenology and other processes (in days)
862
863	REAL(r_std), SAVE :: tau_hum_month = 20. !! (days)
864	!$OMP THREADPRIVATE(tau_hum_month)
865	REAL(r_std), SAVE :: tau_hum_week = 7. !! (days)
866	!$OMP THREADPRIVATE(tau_hum_week)
867	REAL(r_std), SAVE :: tau_t2m_month = 20. !! (days)
868	!$OMP THREADPRIVATE(tau_t2m_month)
869	REAL(r_std), SAVE :: tau_t2m_week = 7. !! (days)
870	!$OMP THREADPRIVATE(tau_t2m_week)
871	REAL(r_std), SAVE :: tau_tsoil_month = 20. !! (days)
872	!$OMP THREADPRIVATE(tau_tsoil_month)
873	REAL(r_std), SAVE :: tau_soilhum_month = 20. !! (days)
874	!$OMP THREADPRIVATE(tau_soilhum_month)
875	REAL(r_std), SAVE :: tau_gpp_week = 7. !! (days)
876	!$OMP THREADPRIVATE(tau_gpp_week)
877	REAL(r_std), SAVE :: tau_gdd = 40. !! (days)
878	!$OMP THREADPRIVATE(tau_gdd)
879	REAL(r_std), SAVE :: tau_ngd = 50. !! (days)
880	!$OMP THREADPRIVATE(tau_ngd)
881	REAL(r_std), SAVE :: coeff_tau_longterm = 3. !! (unitless)
882	!$OMP THREADPRIVATE(coeff_tau_longterm)
883	REAL(r_std), SAVE :: tau_longterm_max !! (days)
884	!$OMP THREADPRIVATE(tau_longterm_max)
885
886	! 3. Coefficients of equations
887
888	REAL(r_std), SAVE :: bm_sapl_carbres = 5. !!
889	!$OMP THREADPRIVATE(bm_sapl_carbres)
890	REAL(r_std), SAVE :: bm_sapl_sapabove = 0.5 !!
891	!$OMP THREADPRIVATE(bm_sapl_sapabove)
892	REAL(r_std), SAVE :: bm_sapl_heartabove = 2. !!
893	!$OMP THREADPRIVATE(bm_sapl_heartabove)
894	REAL(r_std), SAVE :: bm_sapl_heartbelow = 2. !!
895	!$OMP THREADPRIVATE(bm_sapl_heartbelow)
896	REAL(r_std), SAVE :: init_sapl_mass_leaf_nat = 0.1 !!
897	!$OMP THREADPRIVATE(init_sapl_mass_leaf_nat)
898	REAL(r_std), SAVE :: init_sapl_mass_leaf_agri = 1. !!
899	!$OMP THREADPRIVATE(init_sapl_mass_leaf_agri)
900	REAL(r_std), SAVE :: init_sapl_mass_carbres = 5. !!
901	!$OMP THREADPRIVATE(init_sapl_mass_carbres)
902	REAL(r_std), SAVE :: init_sapl_mass_root = 0.1 !!
903	!$OMP THREADPRIVATE(init_sapl_mass_root)
904	REAL(r_std), SAVE :: init_sapl_mass_fruit = 0.3 !!
905	!$OMP THREADPRIVATE(init_sapl_mass_fruit)
906	REAL(r_std), SAVE :: cn_sapl_init = 0.5 !!
907	!$OMP THREADPRIVATE(cn_sapl_init)
908	REAL(r_std), SAVE :: migrate_tree = 10.*1.E3 !!
909	!$OMP THREADPRIVATE(migrate_tree)
910	REAL(r_std), SAVE :: migrate_grass = 10.*1.E3 !!
911	!$OMP THREADPRIVATE(migrate_grass)
912	REAL(r_std), SAVE :: lai_initmin_tree = 0.3 !!
913	!$OMP THREADPRIVATE(lai_initmin_tree)
914	REAL(r_std), SAVE :: lai_initmin_grass = 0.1 !!
915	!$OMP THREADPRIVATE(lai_initmin_grass)
916	REAL(r_std), SAVE, DIMENSION(2) :: dia_coeff = (/ 4., 0.5 /) !!
917	!$OMP THREADPRIVATE(dia_coeff)
918	REAL(r_std), SAVE, DIMENSION(2) :: maxdia_coeff =(/ 100., 0.01/) !!
919	!$OMP THREADPRIVATE(maxdia_coeff)
920	REAL(r_std), SAVE, DIMENSION(4) :: bm_sapl_leaf = (/ 4., 4., 0.8, 5./) !!
921	!$OMP THREADPRIVATE(bm_sapl_leaf)
922
923
924
925	!
926	! stomate_litter.f90
927	!
928
929	! 0. Constants
930
931	REAL(r_std), PARAMETER :: Q10 = 10. !!
932
933	! 1. Scalar
934
935	REAL(r_std), SAVE :: z_decomp = 0.2 !! Maximum depth for soil decomposer's activity (m)
936	!$OMP THREADPRIVATE(z_decomp)
937
938	! 2. Arrays
939
940	REAL(r_std), SAVE :: frac_soil_struct_aa = 0.55 !! corresponding to frac_soil(istructural,iactive,iabove)
941	!$OMP THREADPRIVATE(frac_soil_struct_aa)
942	REAL(r_std), SAVE :: frac_soil_struct_ab = 0.45 !! corresponding to frac_soil(istructural,iactive,ibelow)
943	!$OMP THREADPRIVATE(frac_soil_struct_ab)
944	REAL(r_std), SAVE :: frac_soil_struct_sa = 0.7 !! corresponding to frac_soil(istructural,islow,iabove)
945	!$OMP THREADPRIVATE(frac_soil_struct_sa)
946	REAL(r_std), SAVE :: frac_soil_struct_sb = 0.7 !! corresponding to frac_soil(istructural,islow,ibelow)
947	!$OMP THREADPRIVATE(frac_soil_struct_sb)
948	REAL(r_std), SAVE :: frac_soil_metab_aa = 0.45 !! corresponding to frac_soil(imetabolic,iactive,iabove)
949	!$OMP THREADPRIVATE(frac_soil_metab_aa)
950	REAL(r_std), SAVE :: frac_soil_metab_ab = 0.45 !! corresponding to frac_soil(imetabolic,iactive,ibelow)
951	!$OMP THREADPRIVATE(frac_soil_metab_ab)
952	REAL(r_std), SAVE, DIMENSION(nparts) :: CN = & !! C/N ratio of each plant pool (0-100, unitless)
953	& (/ 40., 40., 40., 40., 40., 40., 40., 40. /)
954	!$OMP THREADPRIVATE(CN)
955	REAL(r_std), SAVE, DIMENSION(nparts) :: LC = & !! Lignin/C ratio of different plant parts (0,22-0,35, unitless)
956	& (/ 0.22, 0.35, 0.35, 0.35, 0.35, 0.22, 0.22, 0.22 /)
957	!$OMP THREADPRIVATE(LC)
958
959	! 3. Coefficients of equations
960
961	REAL(r_std), SAVE :: metabolic_ref_frac = 0.85 !! used by litter and soilcarbon (0-1, unitless)
962	!$OMP THREADPRIVATE(metabolic_ref_frac)
963	REAL(r_std), SAVE :: metabolic_LN_ratio = 0.018 !! (0-1, unitless)
964	!$OMP THREADPRIVATE(metabolic_LN_ratio)
965	REAL(r_std), SAVE :: tau_metabolic = 0.066 !!
966	!$OMP THREADPRIVATE(tau_metabolic)
967	REAL(r_std), SAVE :: tau_struct = 0.245 !!
968	!$OMP THREADPRIVATE(tau_struct)
969	REAL(r_std), SAVE :: soil_Q10 = 0.69 !!= ln 2
970	!$OMP THREADPRIVATE(soil_Q10)
971	REAL(r_std), SAVE :: tsoil_ref = 30. !!
972	!$OMP THREADPRIVATE(tsoil_ref)
973	REAL(r_std), SAVE :: litter_struct_coef = 3. !!
974	!$OMP THREADPRIVATE(litter_struct_coef)
975	REAL(r_std), SAVE, DIMENSION(3) :: moist_coeff = (/ 1.1, 2.4, 0.29 /) !!
976	!$OMP THREADPRIVATE(moist_coeff)
977	REAL(r_std), SAVE :: moistcont_min = 0.25 !! minimum soil wetness to limit the heterotrophic respiration
978	!$OMP THREADPRIVATE(moistcont_min)
979
980
981	!
982	! stomate_lpj.f90
983	!
984
985	! 1. Scalar
986
987	REAL(r_std), SAVE :: frac_turnover_daily = 0.55 !! (0-1, unitless)
988	!$OMP THREADPRIVATE(frac_turnover_daily)
989
990
991	!
992	! stomate_npp.f90
993	!
994
995	! 1. Scalar
996
997	REAL(r_std), SAVE :: tax_max = 0.8 !! Maximum fraction of allocatable biomass used
998	!! for maintenance respiration (0-1, unitless)
999	!$OMP THREADPRIVATE(tax_max)
1000
1001
1002	!
1003	! stomate_phenology.f90
1004	!
1005
1006	! 1. Scalar
1007
1008	REAL(r_std), SAVE :: min_growthinit_time = 300. !! minimum time since last beginning of a growing season (days)
1009	!$OMP THREADPRIVATE(min_growthinit_time)
1010	REAL(r_std), SAVE :: moiavail_always_tree = 1.0 !! moisture monthly availability above which moisture tendency doesn't matter
1011	!! - for trees (0-1, unitless)
1012	!$OMP THREADPRIVATE(moiavail_always_tree)
1013	REAL(r_std), SAVE :: moiavail_always_grass = 0.6 !! moisture monthly availability above which moisture tendency doesn't matter
1014	!! - for grass (0-1, unitless)
1015	!$OMP THREADPRIVATE(moiavail_always_grass)
1016	REAL(r_std), SAVE :: t_always !! monthly temp. above which temp. tendency doesn't matter
1017	!$OMP THREADPRIVATE(t_always)
1018	REAL(r_std), SAVE :: t_always_add = 10. !! monthly temp. above which temp. tendency doesn't matter (C)
1019	!$OMP THREADPRIVATE(t_always_add)
1020
1021	! 3. Coefficients of equations
1022
1023	REAL(r_std), SAVE :: gddncd_ref = 603. !!
1024	!$OMP THREADPRIVATE(gddncd_ref)
1025	REAL(r_std), SAVE :: gddncd_curve = 0.0091 !!
1026	!$OMP THREADPRIVATE(gddncd_curve)
1027	REAL(r_std), SAVE :: gddncd_offset = 64. !!
1028	!$OMP THREADPRIVATE(gddncd_offset)
1029
1030
1031	!
1032	! stomate_prescribe.f90
1033	!
1034
1035	! 3. Coefficients of equations
1036
1037	REAL(r_std), SAVE :: bm_sapl_rescale = 40. !!
1038	!$OMP THREADPRIVATE(bm_sapl_rescale)
1039
1040
1041	!
1042	! stomate_resp.f90
1043	!
1044
1045	! 3. Coefficients of equations
1046
1047	REAL(r_std), SAVE :: maint_resp_min_vmax = 0.3 !!
1048	!$OMP THREADPRIVATE(maint_resp_min_vmax)
1049	REAL(r_std), SAVE :: maint_resp_coeff = 1.4 !!
1050	!$OMP THREADPRIVATE(maint_resp_coeff)
1051
1052
1053	!
1054	! stomate_soilcarbon.f90
1055	!
1056
1057	! 2. Arrays
1058
1059	! 2.1 frac_carb_coefficients
1060
1061	REAL(r_std), SAVE :: frac_carb_ap = 0.004 !! from active pool: depends on clay content (0-1, unitless)
1062	!! corresponding to frac_carb(:,iactive,ipassive)
1063	!$OMP THREADPRIVATE(frac_carb_ap)
1064	REAL(r_std), SAVE :: frac_carb_sa = 0.42 !! from slow pool (0-1, unitless)
1065	!! corresponding to frac_carb(:,islow,iactive)
1066	!$OMP THREADPRIVATE(frac_carb_sa)
1067	REAL(r_std), SAVE :: frac_carb_sp = 0.03 !! from slow pool (0-1, unitless)
1068	!! corresponding to frac_carb(:,islow,ipassive)
1069	!$OMP THREADPRIVATE(frac_carb_sp)
1070	REAL(r_std), SAVE :: frac_carb_pa = 0.45 !! from passive pool (0-1, unitless)
1071	!! corresponding to frac_carb(:,ipassive,iactive)
1072	!$OMP THREADPRIVATE(frac_carb_pa)
1073	REAL(r_std), SAVE :: frac_carb_ps = 0.0 !! from passive pool (0-1, unitless)
1074	!! corresponding to frac_carb(:,ipassive,islow)
1075	!$OMP THREADPRIVATE(frac_carb_ps)
1076
1077	! 3. Coefficients of equations
1078
1079	REAL(r_std), SAVE :: active_to_pass_clay_frac = 0.68 !! (0-1, unitless)
1080	!$OMP THREADPRIVATE(active_to_pass_clay_frac)
1081	!! residence times in carbon pools (days)
1082	REAL(r_std), SAVE :: carbon_tau_iactive = 0.149 !! residence times in active pool (days)
1083	!$OMP THREADPRIVATE(carbon_tau_iactive)
1084	REAL(r_std), SAVE :: carbon_tau_islow = 7.0 !! residence times in slow pool (days)
1085	!$OMP THREADPRIVATE(carbon_tau_islow)
1086	REAL(r_std), SAVE :: carbon_tau_ipassive = 300. !! residence times in passive pool (days)
1087	!$OMP THREADPRIVATE(carbon_tau_ipassive)
1088	REAL(r_std), SAVE, DIMENSION(3) :: flux_tot_coeff = (/ 1.2, 1.4, .75/)
1089	!$OMP THREADPRIVATE(flux_tot_coeff)
1090
1091	!
1092	! stomate_turnover.f90
1093	!
1094
1095	! 3. Coefficients of equations
1096
1097	REAL(r_std), SAVE :: new_turnover_time_ref = 20. !!(days)
1098	!$OMP THREADPRIVATE(new_turnover_time_ref)
1099	REAL(r_std), SAVE :: leaf_age_crit_tref = 20. !! (C)
1100	!$OMP THREADPRIVATE(leaf_age_crit_tref)
1101	REAL(r_std), SAVE, DIMENSION(3) :: leaf_age_crit_coeff = (/ 1.5, 0.75, 10./) !! (unitless)
1102	!$OMP THREADPRIVATE(leaf_age_crit_coeff)
1103
1104
1105	!
1106	! stomate_vmax.f90
1107	!
1108
1109	! 1. Scalar
1110
1111	REAL(r_std), SAVE :: vmax_offset = 0.3 !! minimum leaf efficiency (unitless)
1112	!$OMP THREADPRIVATE(vmax_offset)
1113	REAL(r_std), SAVE :: leafage_firstmax = 0.03 !! relative leaf age at which efficiency
1114	!! reaches 1 (unitless)
1115	!$OMP THREADPRIVATE(leafage_firstmax)
1116	REAL(r_std), SAVE :: leafage_lastmax = 0.5 !! relative leaf age at which efficiency
1117	!! falls below 1 (unitless)
1118	!$OMP THREADPRIVATE(leafage_lastmax)
1119	REAL(r_std), SAVE :: leafage_old = 1. !! relative leaf age at which efficiency
1120	!! reaches its minimum (vmax_offset)
1121	!! (unitless)
1122	!$OMP THREADPRIVATE(leafage_old)
1123	!
1124	! stomate_season.f90
1125	!
1126
1127	! 1. Scalar
1128
1129	REAL(r_std), SAVE :: gppfrac_dormance = 0.2 !! report maximal GPP/GGP_max for dormance (0-1, unitless)
1130	!$OMP THREADPRIVATE(gppfrac_dormance)
1131	REAL(r_std), SAVE :: tau_climatology = 20. !! tau for "climatologic variables (years)
1132	!$OMP THREADPRIVATE(tau_climatology)
1133	REAL(r_std), SAVE :: hvc1 = 0.019 !! parameters for herbivore activity (unitless)
1134	!$OMP THREADPRIVATE(hvc1)
1135	REAL(r_std), SAVE :: hvc2 = 1.38 !! parameters for herbivore activity (unitless)
1136	!$OMP THREADPRIVATE(hvc2)
1137	REAL(r_std), SAVE :: leaf_frac_hvc = 0.33 !! leaf fraction (0-1, unitless)
1138	!$OMP THREADPRIVATE(leaf_frac_hvc)
1139	REAL(r_std), SAVE :: tlong_ref_max = 303.1 !! maximum reference long term temperature (K)
1140	!$OMP THREADPRIVATE(tlong_ref_max)
1141	REAL(r_std), SAVE :: tlong_ref_min = 253.1 !! minimum reference long term temperature (K)
1142	!$OMP THREADPRIVATE(tlong_ref_min)
1143
1144	! 3. Coefficients of equations
1145
1146	REAL(r_std), SAVE :: ncd_max_year = 3.
1147	!$OMP THREADPRIVATE(ncd_max_year)
1148	REAL(r_std), SAVE :: gdd_threshold = 5.
1149	!$OMP THREADPRIVATE(gdd_threshold)
1150	REAL(r_std), SAVE :: green_age_ever = 2.
1151	!$OMP THREADPRIVATE(green_age_ever)
1152	REAL(r_std), SAVE :: green_age_dec = 0.5
1153	!$OMP THREADPRIVATE(green_age_dec)
1154
1155	END MODULE constantes_var

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