ORCHIDEE response to CO2 rise
(1% increase per year after 2017)

Old formula : \( \mathsf{Vcmax} = \mathsf{Vcmax25} \cdot (1 - \mathsf{coef\_down\_reg} \cdot \log(\mathsf{CO2} / 380) ) \)

New formula : \( \mathsf{Vcmax} = \mathsf{Vcmax25} \cdot (1 - \mathsf{coef\_down\_reg} \cdot (\mathsf{CO2}-380) / (\mathsf{CO2}+\mathsf{coef\_curve}) ) \)

PFT	PFT2	PFT3	PFT4	PFT5	PFT6	PFT7	PFT8	PFT9	PFT10	PFT11	PFT12	PFT13	PFT14	PFT15
Vcmax	45	45	35	40	50	45	35	35	50	50	60	60	50	50
OLD coef_down_reg	0.38	0.38	0.28	0.28	0.28	0.22	0.22	0.22	0.26	0.03	0.26	0.03	0.26	0.26
NEW0 coef_down_reg	0.35	0.35	0.26	0.26	0.26	0.20	0.20	0.20	0.24	0.03	0.24	0.03	0.24	0.24
NEW0 coef_curve	20	20	20	20	20	20	20	20	20	20	20	20	20	20
NEW1 coef_down_reg	0.44	0.44	0.32	0.32	0.32	0.25	0.25	0.25	0.30	0.03	0.30	0.03	0.30	0.30
NEW1 coef_curve	96	96	96	96	96	96	96	96	96	96	96	96	96	96
NEW2 coef_down_reg	0.68	0.68	0.50	0.50	0.50	0.39	0.39	0.39	0.46	0.05	0.46	0.05	0.46	0.46
NEW2 coef_curve	305	305	305	305	305	305	305	305	305	305	305	305	305	305

BR-Sa3 (lat : -3.018, lon : -54.971) PFT2 Forcing : 2000-2003	ID-Pag (lat : 2.345, lon : 114.036) PFT2 Forcing : 2002-2003	FR-LBr (lat : 44.717, lon : -0.769) PFT4 Forcing : 1996-2006	AU-Tum (lat : -35.656, lon : 148.152) PFT5 Forcing : 2001-2006	FR-Hes (lat : 48.674, lon : 7.065) PFT6 Forcing : 1997-2006	CA-Qfo (lat : 49.693, lon : -74.342) PFT7 Forcing : 2003-2006	DE-Meh (lat : 51.275, lon : 10.656) PFT10 Forcing : 2003-2006	FR-Gri (lat : 48.844, lon : 1.952) PFT12 Forcing : 2005-2006	US-Bo1 (lat : 40.006, lon : -88.290) PFT13 Forcing : 1996-2007	US-Bkg (lat : 44.345, lon : -96.836) PFT15 Forcing : 2004-2006

Site	Forcing year	Simulation year / CO2	NPP [kgC/m2/y] no downreg	NPP [kgC/m2/y] old	NPP [kgC/m2/y] new0	NPP [kgC/m2/y] new1	NPP [kgC/m2/y] new2	GPP [kgC/m2/y] no downreg	GPP [kgC/m2/y] old	GPP [kgC/m2/y] new0	GPP [kgC/m2/y] new1	GPP [kgC/m2/y] new2
BR-Sa3	2000	2000 / 368.23 2076 / 727.45	1.06 1.36 (29%)	1.06 1.15 (8%)	1.06 1.21 (14%)	1.06 1.18 (11%)	1.06 1.16 (8.9%)	2.89 3.98 (38%)	2.91 3.47 (19%)	2.91 3.63 (25%)	2.91 3.58 (23%)	2.91 3.51 (20%)
ID-Pag	2002	2002 / 371.93 2078 / 742.07	0.733 1.27 (73%)	0.737 1.04 (41%)	0.736 1.12 (53%)	0.736 1.1 (50%)	0.737 1.06 (43%)	2.63 4.11 (56%)	2.65 3.5 (32%)	2.65 3.73 (41%)	2.65 3.67 (39%)	2.65 3.55 (34%)
FR-LBr	1996	1996 / 361.2 2073 / 706.06	0.59 0.929 (57%)	0.602 0.713 (18%)	0.601 0.771 (28%)	0.601 0.755 (26%)	0.602 0.725 (21%)	1.51 2.26 (49%)	1.54 1.85 (20%)	1.53 1.96 (28%)	1.53 1.93 (26%)	1.54 1.87 (22%)
AU-Tum	2001	2001 / 369.79 2079 / 749.49	0.662 0.86 (30%)	0.664 0.702 (5.7%)	0.664 0.758 (14%)	0.664 0.745 (12%)	0.664 0.715 (7.7%)	1.57 2.01 (28%)	1.58 1.69 (6.7%)	1.58 1.8 (14%)	1.58 1.77 (12%)	1.58 1.71 (8.3%)
FR-Hes	1997	1997 / 362.51 2077 / 734.73	0.823 1.09 (32%)	0.831 0.944 (14%)	0.829 0.997 (20%)	0.83 0.985 (19%)	0.831 0.956 (15%)	1.54 1.99 (29%)	1.56 1.75 (13%)	1.55 1.84 (18%)	1.55 1.82 (17%)	1.56 1.77 (14%)
CA-Qfo	2003	2003 / 374.39 2079 / 749.49	0.303 0.47 (55%)	0.351 0.4 (14%)	0.351 0.426 (21%)	0.351 0.42 (20%)	0.352 0.407 (16%)	0.919 1.27 (38%)	1 1.11 (11%)	1 1.17 (17%)	1 1.16 (16%)	1 1.13 (13%)
DE-Meh	2003	2003 / 374.39 2079 / 749.49	0.304 0.633 (1.1e+02%)	0.312 0.539 (73%)	0.313 0.575 (84%)	0.312 0.567 (82%)	0.312 0.551 (76%)	0.575 1.1 (91%)	0.588 0.956 (63%)	0.589 1.01 (71%)	0.588 0.998 (70%)	0.588 0.973 (66%)
FR-Gri	2005	2005 / 378.23 2079 / 749.49	0.65 1.26 (94%)	0.643 1.09 (70%)	0.643 1.15 (79%)	0.643 1.14 (77%)	0.643 1.11 (72%)	1.17 2.15 (84%)	1.17 1.89 (62%)	1.17 1.98 (70%)	1.17 1.96 (68%)	1.17 1.91 (64%)
US-Bo1	1996	1996 / 361.2 2080 / 756.99	1.04 1.12 (7.2%)	1.04 1.1 (5.6%)	1.04 1.11 (6.2%)	1.04 1.11 (6.2%)	1.04 1.1 (5.8%)	1.72 1.83 (6.3%)	1.72 1.81 (4.9%)	1.72 1.82 (5.4%)	1.72 1.82 (5.4%)	1.72 1.81 (5%)
US-Bkg	2004	2004 / 376.12 2079 / 749.49	0.238 0.392 (65%)	0.239 0.314 (32%)	0.239 0.341 (43%)	0.239 0.334 (40%)	0.239 0.321 (35%)	0.567 0.852 (50%)	0.568 0.713 (25%)	0.568 0.762 (34%)	0.568 0.749 (32%)	0.568 0.727 (28%)