Regional applicability of seven meteorological
drought indices in China
YANG Qing;LI MingXing;ZHENG ZiYan;MA ZhuGuo;
【期刊名称】《中国科学》 【年(卷),期】2017(060)004
【摘要】The definition of a drought index is the foundation of drought research.However,because of the complexity of drought,there is no a unified drought index appropriate for different drought types and objects at the same time.Therefore,it is crucial to determine the regional applicability of various drought indices.Using terrestrial water storage obtained from the Gravity Recovery And Climate Experiment,and the observed soil moisture and streamflow in China,we evaluated the regional applicability of seven meteorological drought indices:the Palmer Drought Severity Index(PDSI),modified PDSI(PDSI_CN) based on observations in China,self-calibrating PDSI(scPDSI),Surface Wetness Index(SWI),Standardized Precipitation
Precipitation
Index(SPI),Standardized
soil
moisture
Evapotranspiration Index(SPEI),and
simulations conducted using the community land model driven by observed atmospheric forcing(CLM3.5/ObsFC).The results showed that the scPDSI is most appropriate for China.However,it should be noted that the scPDSI reduces the value range slightly compared with the PDSI and PDSI_CN;thus,the classification of dry and wet conditions should be
Regional applicability of seven meteorological drought indices in China
