Table 2 A selection of published error sources and variability from various input variables used in PEMs.

Meteorology

16 - 43% difference in NPP

[58]

28% difference in GPP

[18]

PAR

35-62% over predicted NPP

[107]

13% difference in NPP

[33]

LUE

0.2 - 1.8 g C MJ^-1 (in-situ)

[3]

FAPAR

RMSE 0.1 - 0.12

[108]

8-20% greater than in-situ

[109]