Wang, Wen; Zhu, Ye; Xu, Rengui; Liu, Jintao - In: Natural Hazards 75 (2015) 3, pp. 2437-2451
Using monthly meteorological observation data at 633 sites in China during 1961–2012, the drought severity change has been investigated in terms of the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI) with potential evapotranspiration...
