Fig. 6From: Characterizing extreme drought and wetness in Guangdong, China using global navigation satellite system and precipitation dataSPCI1-24, SSMI1, and SRI1 time series in Guangdong (a), and the respective correlations between SPCIn and SSMI1, as well as SRI1Â (b). SPCI: Standardized Precipitation Conversion Index; SSMI: Standardized Soil Moisture Index; SRI: Standardized Runoff IndexBack to article page