Figure 5: SIF-GPP relationships under different land cover types for March to May (MAM) (a), June to August (JJA) (b), September to November (SON) (c), and December to February (DJF) (d) of 2013. The full names for land cover types are, Croplands (Crop), Grassland (Grass), Mixed Forest (MF), Evergreen Broadleaf Forest (EBF), Deciduous Needleleaf Forest (DNF), Deciduous Broadleaf Forest (DBF), Woody Savannas (WSavanna), and Open Shrublands (OShrub).