Palmer干旱指数、地表湿润指数与降水距平的比较

doi:10.11821/xb20037s014

地理学报 ›› 2003, Vol. 58 ›› Issue (7s): 117-124.doi: 10.11821/xb20037s014

Palmer干旱指数、地表湿润指数与降水距平的比较

卫捷¹, 马柱国²

1. 中国科学院大气物理研究所，北京 100029；
2. 中国科学院东亚区域气候-环境重点实验室，中国科学院大气物理研究所东亚中心，北京 100029

收稿日期:2003-02-17 修回日期:2003-07-20 出版日期:2003-12-25 发布日期:2003-12-25
作者简介:卫捷 (1966-), 女, 助研。 E-mail: wjie@mail.iap.ac.cn
基金资助:
国家重点基础研究发展规划项目(G1999043405)；中国科学院知识创新工程重要方向项目 (ZKCX2-SW-210)

Comparison of Palmer Drought Severity Index, Percentage of Precipitation Anomaly and Surface Humid Index

WEI Jie¹, MA Zhuguo²

1. Institute of Atmospheric Physics, CAS, Beijing 100029, China;
2. Chinese Academy of Sciences Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, START Regional Center for East Asia, Institute of Atmospheric Physics, CAS, Beijing 100029, China

Received:2003-02-17 Revised:2003-07-20 Published:2003-12-25 Online:2003-12-25
Supported by:
National Key Planning Development for Basic Research, No.G1999043405; Knowlege Innovation Project of CAS, No ZKCX2-SW-210

摘要/Abstract

摘要：

利用中国气象局整编的1951年1月～1999年12月中国160站气温、降水月平均资料，计算了我国160站近49年逐月帕尔默干旱指数、地表湿润指数和降水距平百分率。对比研究表明：PDSI指数和地表湿润指数能抓住降水是干旱最重要的决定因素这一特征，并且，能反映出干旱过程具有更大的时空尺度。在实际蒸发较大的地区，PDSI指数比降水距平百分率描述干旱强度更准确。对于华北地区，在20世纪80年代以前，降水偏多，气温偏低，最大潜在蒸发较小，处于相对湿润的时段；80年代以后，降水偏少，加之气温的升高，华北的干旱越来越严重。

关键词: Palmer干旱指数, 地表湿润指数, 降水距平百分率, 中国

Abstract:

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.

Key words: Palmer drought severity index, percentage of precipitation anomaly, surface humid index, China

卫捷,马柱国. Palmer干旱指数、地表湿润指数与降水距平的比较[J]. 地理学报, 2003, 58(7s): 117-124.

WEI Jie, MA Zhuguo. Comparison of Palmer Drought Severity Index, Percentage of Precipitation Anomaly and Surface Humid Index[J]. Acta Geographica Sinica, 2003, 58(7s): 117-124.

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Palmer干旱指数、地表湿润指数与降水距平的比较

Comparison of Palmer Drought Severity Index, Percentage of Precipitation Anomaly and Surface Humid Index

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