1 | ! Stomate: Land cover change |
---|
2 | ! |
---|
3 | ! authors: M. Boisserie, P. Friedlingstein, P. Smith |
---|
4 | ! |
---|
5 | ! |
---|
6 | ! |
---|
7 | ! |
---|
8 | ! version 1.0: May 2008 |
---|
9 | ! |
---|
10 | !< $HeadURL$ |
---|
11 | !< $Date$ |
---|
12 | !< $Author$ |
---|
13 | !< $Revision$ |
---|
14 | ! IPSL (2006) |
---|
15 | ! This software is governed by the CeCILL licence see ORCHIDEE/ORCHIDEE_CeCILL.LIC |
---|
16 | ! |
---|
17 | MODULE stomate_lcchange |
---|
18 | |
---|
19 | |
---|
20 | ! modules used: |
---|
21 | |
---|
22 | USE ioipsl |
---|
23 | USE stomate_data |
---|
24 | USE pft_parameters |
---|
25 | USE constantes |
---|
26 | |
---|
27 | IMPLICIT NONE |
---|
28 | |
---|
29 | |
---|
30 | PRIVATE |
---|
31 | PUBLIC lcchange_main |
---|
32 | |
---|
33 | CONTAINS |
---|
34 | |
---|
35 | SUBROUTINE lcchange_main ( npts, dt_days, veget_max, veget_max_new,& |
---|
36 | biomass, ind, age, PFTpresent, senescence, when_growthinit, everywhere, veget,& |
---|
37 | co2_to_bm, bm_to_litter, turnover_daily, bm_sapl, tree, cn_ind,flux10,flux100, & |
---|
38 | prod10,prod100,& |
---|
39 | !!$,prod10_total,prod100_total,& |
---|
40 | convflux,& |
---|
41 | !!$,cflux_prod_total, |
---|
42 | cflux_prod10,cflux_prod100, leaf_frac,& |
---|
43 | npp_longterm, lm_lastyearmax, litter, carbon) |
---|
44 | |
---|
45 | IMPLICIT NONE |
---|
46 | ! 0 declarations |
---|
47 | |
---|
48 | ! 0.1 input |
---|
49 | |
---|
50 | ! Domain size |
---|
51 | INTEGER, INTENT(in) :: npts |
---|
52 | |
---|
53 | ! Time step (days) |
---|
54 | REAL(r_std), INTENT(in) :: dt_days |
---|
55 | |
---|
56 | ! new "maximal" coverage fraction of a PFT (LAI -> infinity) on ground |
---|
57 | REAL(r_std), DIMENSION(npts,nvm), INTENT(INOUT) :: veget_max_new |
---|
58 | ! biomass of sapling (gC/individu) |
---|
59 | REAL(r_std) , DIMENSION (nvm, nparts), INTENT(in) :: bm_sapl |
---|
60 | |
---|
61 | ! is pft a tree |
---|
62 | LOGICAL, DIMENSION(nvm), INTENT(in) :: tree |
---|
63 | |
---|
64 | ! 0.2 modified fields |
---|
65 | |
---|
66 | ! fractional coverage on natural/agricultural ground, taking into |
---|
67 | ! account LAI (=grid-scale fpc) |
---|
68 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: veget |
---|
69 | |
---|
70 | ! "maximal" coverage fraction of a PFT (LAI -> infinity) on nat/agri ground |
---|
71 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: veget_max |
---|
72 | |
---|
73 | ! biomass (gC/(m**2 of nat/agri ground)) |
---|
74 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(inout) :: biomass |
---|
75 | |
---|
76 | ! density of individuals 1/m**2 |
---|
77 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: ind |
---|
78 | |
---|
79 | ! mean age (years) |
---|
80 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: age |
---|
81 | |
---|
82 | ! is the plant senescent? (only for deciduous trees - carbohydrate reserve) |
---|
83 | ! set to .FALSE. if PFT is introduced or killed |
---|
84 | LOGICAL, DIMENSION(npts,nvm), INTENT(inout) :: senescence |
---|
85 | |
---|
86 | ! PFT exists |
---|
87 | LOGICAL, DIMENSION(npts,nvm), INTENT(inout) :: PFTpresent |
---|
88 | |
---|
89 | ! is the PFT everywhere in the grid box or very localized (after its introduction) |
---|
90 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: everywhere |
---|
91 | |
---|
92 | ! how many days ago was the beginning of the growing season |
---|
93 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: when_growthinit |
---|
94 | |
---|
95 | ! biomass uptaken (gC/(m**2)/day) |
---|
96 | !NV passage 2D |
---|
97 | |
---|
98 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: co2_to_bm |
---|
99 | |
---|
100 | ! conversion of biomass to litter (gC/(m**2 of nat/agri ground)) / day |
---|
101 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(inout) :: bm_to_litter |
---|
102 | |
---|
103 | ! crown area (m**2) per ind. |
---|
104 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: cn_ind |
---|
105 | |
---|
106 | ! products remaining in the 10/100 year-turnover pool after the annual release for each compartment |
---|
107 | ! (10 or 100 + 1 : input from year of land cover change) |
---|
108 | REAL(r_std), DIMENSION(npts,0:10), INTENT(inout) :: prod10 |
---|
109 | REAL(r_std), DIMENSION(npts,0:100), INTENT(inout) :: prod100 |
---|
110 | |
---|
111 | ! annual release from the 10/100 year-turnover pool compartments |
---|
112 | REAL(r_std), DIMENSION(npts,10), INTENT(inout) :: flux10 |
---|
113 | REAL(r_std), DIMENSION(npts,100), INTENT(inout) :: flux100 |
---|
114 | |
---|
115 | ! fraction of leaves in leaf age class |
---|
116 | REAL(r_std), DIMENSION(npts,nvm,nleafages), INTENT(inout) :: leaf_frac |
---|
117 | |
---|
118 | ! last year's maximum leaf mass, for each PFT (gC/(m**2 of nat/agri ground)) |
---|
119 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: lm_lastyearmax |
---|
120 | |
---|
121 | ! "long term" net primary productivity (gC/(m**2 of nat/agri ground)/year) |
---|
122 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: npp_longterm |
---|
123 | |
---|
124 | ! metabolic and structural litter, above and below ground (gC/(m**2 of ground)) |
---|
125 | REAL(r_std),DIMENSION(npts,nlitt,nvm,nlevs), INTENT(inout) :: litter |
---|
126 | ! carbon pool: active, slow, or passive,(gC/(m**2 of ground)) |
---|
127 | REAL(r_std),DIMENSION(npts,ncarb,nvm), INTENT(inout) :: carbon |
---|
128 | |
---|
129 | ! 0.3 output |
---|
130 | |
---|
131 | ! release during first year following land cover change |
---|
132 | REAL(r_std), DIMENSION(npts), INTENT(out) :: convflux |
---|
133 | |
---|
134 | ! total annual release from the 10/100 year-turnover pool |
---|
135 | REAL(r_std), DIMENSION(npts), INTENT(out) :: cflux_prod10, cflux_prod100 |
---|
136 | |
---|
137 | !!$ ! total products remaining in the pool after the annual release |
---|
138 | !!$ REAL(r_std), DIMENSION(npts), INTENT(out) :: prod10_total, prod100_total |
---|
139 | !!$ |
---|
140 | !!$ ! total flux from conflux and the 10/100 year-turnover pool |
---|
141 | !!$ REAL(r_std), DIMENSION(npts), INTENT(out) :: cflux_prod_total |
---|
142 | |
---|
143 | ! Turnover rates (gC/(m**2 of ground)/day) |
---|
144 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(inout) :: turnover_daily |
---|
145 | |
---|
146 | ! 0.4 local |
---|
147 | |
---|
148 | ! indices |
---|
149 | INTEGER(i_std) :: i, j, k, l, m |
---|
150 | |
---|
151 | ! biomass increase (gC/(m**2 of ground)) |
---|
152 | REAL(r_std) :: bm_new |
---|
153 | ! biomass loss (gC /(m² of ground)) |
---|
154 | REAL(r_std),DIMENSION(npts,nparts) :: biomass_loss |
---|
155 | REAL(r_std) :: above |
---|
156 | ! Litter dilution (gC/m²) |
---|
157 | REAL(r_std),DIMENSION(npts,nlitt,nlevs) :: dilu_lit |
---|
158 | ! Soil Carbondilution (gC/m²) |
---|
159 | REAL(r_std),DIMENSION(npts,ncarb) :: dilu_soil_carbon |
---|
160 | |
---|
161 | ! vecteur de conversion |
---|
162 | REAL(r_std),DIMENSION(nvm) :: delta_veg |
---|
163 | ! vecteur de conversion |
---|
164 | REAL(r_std) :: delta_veg_sum |
---|
165 | ! change in number of individuals |
---|
166 | REAL(r_std),DIMENSION(npts,nvm) :: delta_ind |
---|
167 | |
---|
168 | ! ========================================================================= |
---|
169 | |
---|
170 | IF (bavard.GE.3) WRITE(numout,*) 'Entering lcchange_main' |
---|
171 | |
---|
172 | ! yearly initialisation |
---|
173 | prod10(:,0) = zero |
---|
174 | prod100(:,0) = zero |
---|
175 | above = zero |
---|
176 | convflux(:) = zero |
---|
177 | cflux_prod10(:) = zero |
---|
178 | cflux_prod100(:) = zero |
---|
179 | !!$ prod10_total(:) = zero |
---|
180 | !!$ prod100_total(:) = zero |
---|
181 | !!$ cflux_prod_total(:) = zero |
---|
182 | |
---|
183 | delta_ind(:,:) = zero |
---|
184 | delta_veg(:) = zero |
---|
185 | |
---|
186 | DO i = 1, npts |
---|
187 | |
---|
188 | ! Génération du vecteur de conversion |
---|
189 | |
---|
190 | delta_veg(:) = veget_max_new(i,:)-veget_max(i,:) |
---|
191 | delta_veg_sum = SUM(delta_veg,MASK=delta_veg.LT.0.) |
---|
192 | |
---|
193 | dilu_lit(i,:,:) = zero |
---|
194 | dilu_soil_carbon(i,:) = zero |
---|
195 | biomass_loss(i,:) = zero |
---|
196 | |
---|
197 | DO j=2, nvm |
---|
198 | IF ( delta_veg(j) < -min_stomate ) THEN |
---|
199 | dilu_lit(i,:,:)= dilu_lit(i,:,:) + delta_veg(j)*litter(i,:,j,:) / delta_veg_sum |
---|
200 | dilu_soil_carbon(i,:)= dilu_soil_carbon(i,:) + delta_veg(j) * carbon(i,:,j) / delta_veg_sum |
---|
201 | biomass_loss(i,:)=biomass_loss(i,:) + biomass(i,j,:)*delta_veg(j) / delta_veg_sum |
---|
202 | ENDIF |
---|
203 | ENDDO |
---|
204 | |
---|
205 | DO j=2, nvm |
---|
206 | IF ( delta_veg(j) > min_stomate) THEN |
---|
207 | ! in case of establishment of a new PFT or extension of its coverage in a gridcell |
---|
208 | IF (veget_max(i,j) .LT. min_stomate) THEN |
---|
209 | IF (tree(j)) THEN |
---|
210 | cn_ind(i,j) = cn_sapl(j) |
---|
211 | ELSE |
---|
212 | cn_ind(i,j) = un |
---|
213 | ENDIF |
---|
214 | ind(i,j)= delta_veg(j) / cn_ind(i,j) |
---|
215 | PFTpresent(i,j) = .TRUE. |
---|
216 | everywhere(i,j) = un |
---|
217 | senescence(i,j) = .FALSE. |
---|
218 | age(i,j) = zero |
---|
219 | |
---|
220 | when_growthinit(i,j) = large_value |
---|
221 | leaf_frac(i,j,1) = un |
---|
222 | npp_longterm(i,j) = npp_longterm_init |
---|
223 | lm_lastyearmax(i,j) = bm_sapl(j,ileaf) * ind(i,j) |
---|
224 | ENDIF |
---|
225 | IF ( cn_ind(i,j) > min_stomate ) THEN |
---|
226 | delta_ind(i,j) = delta_veg(j) / cn_ind(i,j) |
---|
227 | ENDIF |
---|
228 | |
---|
229 | DO k = 1, nparts |
---|
230 | !added shilong 060316 |
---|
231 | bm_new = delta_ind(i,j) * bm_sapl(j,k) |
---|
232 | IF (veget_max(i,j) .GT. min_stomate) THEN |
---|
233 | IF ((bm_new/delta_veg(j)) > biomass(i,j,k)) THEN |
---|
234 | bm_new = biomass(i,j,k)*delta_veg(j) |
---|
235 | ENDIF |
---|
236 | ENDIF |
---|
237 | biomass(i,j,k) = ( biomass(i,j,k) * veget_max(i,j) + bm_new ) / veget_max_new(i,j) |
---|
238 | !NV passage 2D |
---|
239 | co2_to_bm(i,j) = co2_to_bm(i,j)+ (bm_new* dt_days) / (one_year * veget_max_new(i,j)) |
---|
240 | ENDDO |
---|
241 | |
---|
242 | ! Dilution des reservoirs |
---|
243 | |
---|
244 | ! Litter |
---|
245 | litter(i,:,j,:)=(litter(i,:,j,:) * veget_max(i,j) + & |
---|
246 | dilu_lit(i,:,:) * delta_veg(j)) / veget_max_new(i,j) |
---|
247 | |
---|
248 | ! Soil carbon |
---|
249 | carbon(i,:,j)=(carbon(i,:,j) * veget_max(i,j) + dilu_soil_carbon(i,:) * delta_veg(j)) / veget_max_new(i,j) |
---|
250 | |
---|
251 | ! Litter input |
---|
252 | bm_to_litter(i,j,isapbelow) = bm_to_litter(i,j,isapbelow) + & |
---|
253 | & biomass_loss(i,isapbelow)*delta_veg(j) / veget_max_new(i,j) |
---|
254 | bm_to_litter(i,j,iheartbelow) = bm_to_litter(i,j,iheartbelow) + biomass_loss(i,iheartbelow) *delta_veg(j) & |
---|
255 | & / veget_max_new(i,j) |
---|
256 | bm_to_litter(i,j,iroot) = bm_to_litter(i,j,iroot) + biomass_loss(i,iroot)*delta_veg(j) / veget_max_new(i,j) |
---|
257 | bm_to_litter(i,j,ifruit) = bm_to_litter(i,j,ifruit) + biomass_loss(i,ifruit)*delta_veg(j) / veget_max_new(i,j) |
---|
258 | bm_to_litter(i,j,icarbres) = bm_to_litter(i,j,icarbres) + & |
---|
259 | & biomass_loss(i,icarbres) *delta_veg(j) / veget_max_new(i,j) |
---|
260 | bm_to_litter(i,j,ileaf) = bm_to_litter(i,j,ileaf) + biomass_loss(i,ileaf)*delta_veg(j) / veget_max_new(i,j) |
---|
261 | age(i,j)=age(i,j)*veget_max(i,j)/veget_max_new(i,j) |
---|
262 | ! End if PFT extension |
---|
263 | ELSE ! PFT in reduction |
---|
264 | |
---|
265 | above = biomass(i,j,isapabove) + biomass(i,j,iheartabove) |
---|
266 | convflux(i) = convflux(i) - ( coeff_lcchange_1(j) * above * delta_veg(j) ) ! - car delta_veg <0 |
---|
267 | prod10(i,0) = prod10(i,0) - ( coeff_lcchange_10(j) * above * delta_veg(j) ) |
---|
268 | prod100(i,0) = prod100(i,0) - ( coeff_lcchange_100(j) * above * delta_veg(j) ) |
---|
269 | |
---|
270 | ! End Biomass Export |
---|
271 | |
---|
272 | IF ( veget_max_new(i,j) .LT. min_stomate ) THEN ! Total reduction |
---|
273 | |
---|
274 | veget_max_new(i,j)= zero |
---|
275 | ind(i,j) = zero |
---|
276 | biomass(i,j,:) = zero |
---|
277 | PFTpresent(i,j) = .FALSE. |
---|
278 | senescence(i,j) = .FALSE. |
---|
279 | age(i,j) = zero |
---|
280 | when_growthinit(i,j) = undef |
---|
281 | everywhere(i,j) = zero |
---|
282 | carbon(i,:,j) = zero |
---|
283 | litter(i,:,j,:) = zero |
---|
284 | bm_to_litter(i,j,:) = zero |
---|
285 | turnover_daily(i,j,:) = zero |
---|
286 | |
---|
287 | ENDIF |
---|
288 | |
---|
289 | ENDIF ! End if PFT's coverage reduction |
---|
290 | |
---|
291 | ENDDO ! End loop on PFTs |
---|
292 | |
---|
293 | ! each year, update 10 year-turnover pool content following flux emission |
---|
294 | ! (linear decay (10%) of the initial carbon input) |
---|
295 | DO l = 0, 8 |
---|
296 | m = 10 - l |
---|
297 | cflux_prod10(i) = cflux_prod10(i) + flux10(i,m) |
---|
298 | prod10(i,m) = prod10(i,m-1) - flux10(i,m-1) |
---|
299 | !MM=>stomate_lpj.f90 prod10_total(i) = prod10_total(i) + prod10(i,m) |
---|
300 | flux10(i,m) = flux10(i,m-1) |
---|
301 | |
---|
302 | IF (prod10(i,m) .LT. 1.0) prod10(i,m) = zero |
---|
303 | !MM => quid de prod10_total ??? |
---|
304 | ENDDO |
---|
305 | |
---|
306 | cflux_prod10(i) = cflux_prod10(i) + flux10(i,1) |
---|
307 | flux10(i,1) = 0.1 * prod10(i,0) |
---|
308 | prod10(i,1) = prod10(i,0) |
---|
309 | !MM => quid du test IF (prod10(i,1) .LT. 1.0) prod10(i,1) = 0.0 ???? |
---|
310 | !MM=>stomate_lpj.f90 prod10_total(i) = prod10_total(i) + prod10(i,1) |
---|
311 | |
---|
312 | DO l = 0, 98 |
---|
313 | m = 100 - l |
---|
314 | cflux_prod100(i) = cflux_prod100(i) + flux100(i,m) |
---|
315 | prod100(i,m) = prod100(i,m-1) - flux100(i,m-1) |
---|
316 | !MM=>stomate_lpj.f90 prod100_total(i) = prod100_total(i) + prod100(i,m) |
---|
317 | flux100(i,m) = flux100(i,m-1) |
---|
318 | |
---|
319 | IF (prod100(i,m).LT.1.0) prod100(i,m) = zero |
---|
320 | |
---|
321 | ENDDO |
---|
322 | |
---|
323 | cflux_prod100(i) = cflux_prod100(i) + flux100(i,1) |
---|
324 | flux100(i,1) = 0.01 * prod100(i,0) |
---|
325 | prod100(i,1) = prod100(i,0) |
---|
326 | !MM=> IF (prod100(i,1).LT.1.0) prod100(i,1) = zero |
---|
327 | !MM=>stomate_lpj.f90 prod100_total(i) = prod100_total(i) + prod100(i,1) |
---|
328 | prod10(i,0) = zero |
---|
329 | prod100(i,0) = zero |
---|
330 | |
---|
331 | ENDDO ! End loop on npts |
---|
332 | |
---|
333 | veget_max(:,:) = veget_max_new(:,:) |
---|
334 | |
---|
335 | ! convert flux from /year into /time step |
---|
336 | convflux = convflux/one_year*dt_days |
---|
337 | cflux_prod10 = cflux_prod10/one_year*dt_days |
---|
338 | cflux_prod100 = cflux_prod100/one_year*dt_days |
---|
339 | !MM=>stomate_lpj.f90 cflux_prod_total(:) = convflux(:) + cflux_prod10(:) + cflux_prod100(:) |
---|
340 | |
---|
341 | IF (bavard.GE.4) WRITE(numout,*) 'Leaving lcchange_main' |
---|
342 | |
---|
343 | END SUBROUTINE lcchange_main |
---|
344 | |
---|
345 | END MODULE stomate_lcchange |
---|