帕默尔旱度模式的修正

本文阐述了帕默尔干旱指标的原理、优点及其计算方法。根据其思路，我们用济南和郑州两站的资料对帕默尔模式进行了修正，建立了我国的气象旱度模式，并利用此模式计算了我国140个站点（1951年1月～1980年12月）的帕默尔指数值。我们发现计算的帕默尔指数值与一些文献记载的旱情和实际调查的旱情是较一致的。这表明，修正的帕默尔气象旱度模式能够用于我国。

A Modified Palmer’s Drought Index

This paper expounded the principle and the advantage of the Palmer’s drought index and its procedure of computation of the index. Based on the analysis of the observational data from Jinan and Zhengzhou we modified the Palmer’s drought index to fit the observation data. With this modified index we have calculated the drought index for 140 stations in China from Jan. 1951 to Dec. 1980. It is found that the computed drought indices are consistent with the descritions on drought conditions in some official publications and with the actual observations on drought conditions by the authors, we have the opinion that the modified Palmer’s drought index is suitable for use in China