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. 2012 Dec 17;110(1):52–57. doi: 10.1073/pnas.1207068110

Fig. 3.

Fig. 3.

(A) Relationships between the average SPEI time-scales at which the maximum SPEI/GIMMS-NDVI correlation is found and the average annual water balance across eco-regions considering separately negative and positive water balances. (B) Relationship between the average SPEI time-scale at which maximum SPEI/tree-ring correlation is found and the average annual water balance across eco-regions. (C) Relationship between the average SPEI time-scale at which maximum SPEI/ANPP correlation is found and the average annual water balance across eco-regions for negative and positive water balances. Error bars represent ±1/2 SDs. The linear fits and the coefficients of determination are also shown in all graphs. See corresponding colors in the legend of Fig. 2.