Fig. 3From: Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern IndiaSPI time series for GWB between 1901-2002 for (a) 3-, (b) 12-, (c) 24- and (d) 48- months time scales. Note: -ve SPI value indicates dry condition and +ve SPI value indicates wet condition, If SPI become more –ve or +ve, the conditions become more severely dry or wetBack to article page