Ecosystem Drought Response Timescales from Thermal Emission versus Shortwave Remote Sensing

Figure 5

Average correlation for TCI (with SPEI at 2-month aggregation timescale), VCI (with 13-month timescale SPEI), and VHI (with 4-month timescale SPEI) by latitude. The aggregation times shown are those for which the global mean correlations are highest. The dotted lines show the range over which mean correlations would be not significantly different from zero. This range broadens at high southern latitudes because fewer pixels are available there for averaging.