## Appendix A Input Data Description  
Table 1 contains a description of eddy covariance study sites from Fluxnet (2000-2014) involved in training process (84 stations left after data filtering). The total amount of data for each land cover was as follows: CRO (948 data points), GRA (803 data points), DBF (1023 data points), EBF (709 data points), ENF (675 data points), MF (750 data points), WET (801 data points), and SAV (887 data points).  
Figure 6: Comparison of observed and predicted mean NEE for different land covers in this study. Error bars of each land cover are the standard deviation of observed and predicted daily NEE.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Site Code** & **Lat** & **Lon** & **IGBP** & **Start Year** & **End Year** \\ \hline BE-Lon & 50.5516 & 4.7462 & CRO & 2004 & 2014 \\ CH-Oe2 & 47.2864 & 7.7337 & CRO & 2004 & 2014 \\ DE-Geb & 51.0997 & 10.9146 & CRO & 2001 & 2014 \\ DE-Kli & 50.8931 & 13.5224 & CRO & 2004 & 2014 \\ FR-Gri & 48.8442 & 1.9519 & CRO & 2004 & 2014 \\ IT-BCi & 40.5237 & 14.9574 & CRO & 2004 & 2014 \\ IT-CA2 & 42.3772 & 12.026 & CRO & 2011 & 2014 \\ US-ARM & 36.6058 & \(-\)97.4888 & CRO & 2003 & 2012 \\ US-CRT & 41.6285 & \(-\)83.3471 & CRO & 2011 & 2013 \\ US-Lin & 36.3566 & \(-\)119.0922 & CRO & 2009 & 2010 \\ US-Ne1 & 41.1651 & \(-\)96.4766 & CRO & 2001 & 2013 \\ US-Ne2 & 41.1649 & \(-\)96.4701 & CRO & 2001 & 2013 \\ US-Ne3 & 41.1797 & \(-\)96.4397 & CRO & 2001 & 2013 \\ US-Twt & 38.1087 & \(-\)121.6531 & CRO & 2009 & 2014 \\ DE-Hai & 51.0792 & 10.4522 & DBF & 2000 & 2012 \\ DE-Lnf & 51.3282 & 10.3678 & DBF & 2002 & 2012 \\ DK-Sor & 55.4859 & 11.6446 & DBF & 2000 & 2014 \\ FR-Fon & 48.4764 & 2.7801 & DBF & 2005 & 2014 \\ IT-CA1 & 42.3804 & 12.0266 & DBF & 2011 & 2014 \\ IT-CA3 & 42.38 & 12.0222 & DBF & 2011 & 2014 \\ IT-Col & 41.8494 & 13.5881 & DBF & 2000 & 2014 \\ IT-Isp & 45.8126 & 8.6336 & DBF & 2013 & 2014 \\ IT-PT1 & 45.2009 & 9.061 & DBF & 2002 & 2004 \\ IT-Rol & 42.4081 & 11.93 & DBF & 2000 & 2008 \\ IT-Roz & 42.3903 & 11.9209 & DBF & 2002 & 2012 \\ US-Ha1 & 42.5378 & \(-\)72.1715 & DBF & 2000 & 2012 \\ US-Oho & 41.5545 & \(-\)83.8438 & DBF & 2004 & 2013 \\ US-UMB & 45.5598 & \(-\)84.7138 & DBF & 2000 & 2014 \\ US-UMd & 45.5625 & \(-\)84.6975 & DBF & 2007 & 2014 \\ US-WCr & 45.8059 & \(-\)90.0799 & DBF & 2000 & 2014 \\ AU-Cum & \(-\)33.6152 & 150.7236 & EBF & 2012 & 2014 \\ AU-Wac & \(-\)37.4259 & 145.1878 & EBF & 2005 & 2008 \\ AU-Whr & \(-\)36.6732 & 145.0294 & EBF & 2011 & 2014 \\ AU-Wom & \(-\)37.4222 & 144.0944 & EBF & 2010 & 2014 \\ CN-Din & 23.1733 & 112.5361 & EBF & 2003 & 2005 \\ FR-Pue & 43.7413 & 3.5957 & EBF & 2000 & 2014 \\ IT-Cpz & 41.7052 & 12.3761 & EBF & 2000 & 2009 \\ CZ-BK1 & 49.5021 & 18.5369 & ENF & 2004 & 2014 \\ DE-Obe & 50.7867 & 13.7213 & ENF & 2008 & 2014 \\ DE-Tha & 50.9626 & 13.5651 & ENF & 2000 & 2014 \\ IT-Ren & 46.5869 & 11.4337 & ENF & 2000 & 2013 \\ IT-SRo & 43.7279 & 10.2844 & ENF & 2000 & 2012 \\ US-Blo & 38.8953 & \(-\)120.6328 & ENF & 2000 & 2007 \\ AU-DaP & \(-\)14.0633 & 131.3181 & GRA & 2007 & 2013 \\ AU-Stp & \(-\)17.1507 & 133.3502 & GRA & 2008 & 2014 \\ AU-TTE & \(-\)22.287 & 133.64 & GRA & 2012 & 2014 \\ CH-Cha & 47.2102 & 8.4104 & GRA & 2005 & 2014 \\ CH-Fru & 47.1158 & 8.5378 & GRA & 2005 & 2014 \\ CH-Oe1 & 47.2858 & 7.7319 & GRA & 2002 & 2008 \\ CN-Cng & 44.5934 & 123.5092 & GRA & 2007 & 2010 \\ ES-Amo & 36.8336 & \(-\)2.2523 & OSH & 2007 & 2012 \\ ES-IJu & 36.9266 & \(-\)2.7521 & OSH & 2004 & 2013 \\ US-AR1 & 36.4267 & \(-\)99.42 & GRA & 2009 & 2012 \\ US-AR2 & 36.6358 & \(-\)99.5975 & GRA & 2009 & 2012 \\ US-Goo & 34.2547 & \(-\)89.8735 & GRA & 2002 & 2006 \\ US-Igreen & 41.8406 & \(-\)88.241 & GRA & 2004 & 2011 \\ US-SRC & 31.9083 & \(-\)110.8395 & OSH & 2008 & 2014 \\ US-SRG & 31.7894 & \(-\)110.8277 & GRA & 2008 & 2014 \\ \hline \hline \end{tabular}
\end{table}
Table 1: List of eddy covariance sites after quality control procedure.  
For remote sensing data, we processed 20,438 scenes from different Landsat products (TM, ETM+, and OLI).