Comparison of Palmer Drought Severity Index,Percentage of Precipitation Anomaly and Surface Humid Index
Comparison of Palmer Drought Severity Index,Percentage of Precipitation Anomaly and Surface Humid Index
复制标题
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
W. Jie;S. Regional
中科院分区：
文献类型：
--
作者：
W. Jie;S. Regional
The monthly PDSI, surface moisture index and percentage of precipitation anomaly are calculated for the past 49 years with data from 160 stations in China. The result shows that PDSI and surface moisture index can grasp rainfall, a decisive factor of drought. Moreover, they reflect the process of drought on a greater space and time scale. In the region with more actual evaporation, PDSI describes the severity of drought more precisely than percentage of precipitation anomaly. In North China, before the 1980s, the rainfall was more sufficient, the temperature was higher and the potential evaporation was lower. It was a relatively moist period. Since the 1980s, the rainfall has been less sufficient together with higher temperature, the drought in North China has become more and more severe.
