Satellite-based terrestrial production efficiency modeling

Table 1 Attributes and results of six global PEMs available from the literature.

*PEM*	*Study period*	*Timestep*	*Cell-size*	*LUE Scalars*	*LUE-GPP* (*g C MJ*^-1)	*NPP* (*Pg C yr*^-1)	*Reference*
CASA	1982-1998	Month	0.5°	T, AET, PET	0.39^e	48.0^c	[46]
GLO-PEM	1981-2000	10 days	8 km	T, SW, VPD	1.03-1.64^a	69.7^b	[48]
TURC	1998	Month	1°	No Scalars	1.10	64.0	[49]
C-Fix	1998-2008	10 days	1 km	T, CO₂, SW, EF	1.10	NA^f	[14]
MOD17	2000-2008	Day/Year	1 km	T, VPD	0.68-1.159	56.0^d	[18]
BEAMS	1982-2000	Month	1°	T, h, SW	0.0-1.0		[53]

^a [13]; ^b [31]; ^c [78]; ^d [51]; ^e based on NPP; ^fNA (globally not available in published literature)
T Temperature; SW Soil Water; VPD Vapour Pressure Deficit; AET Actual Evapotranspiration; PET Potential Evapotranspiration; CO₂ fertilization factor; EF Evaporative Fraction; h Relative Humidity

ISSN: 1750-0680