华北地区500年滑动平均降水场序列重建

基于533年旱涝指数场序列，采用了滑动累积频率法用于降水序列重建工作，并选用了3种不同均值用于序列重建试验，得到了1499～2002年共504年连续的滑动平均降水场序列。分析表明，重建的504年降水场序列与49年实测降水场序列相关性较好，其平均相对均方误差在1．89％以下；重建的序列与原旱涝指数序列的非线性关系，表明重建序列是合理的，为华北地区长期旱涝变化规律的研究提供了基础资料。

Reconstruction of 500-Year Moving-Average Precipitation Field Series in North China

Based on the 533 year dryness and wetness grades series, the Moving Cumulative Frequency Method (MCFM) was developed, and a moving average precipitation field series from 1499 to 2002 was reconstructed. The results show that there is good relationship between the reconstructed series and the primitive 49 year observation precipitation series, their relative root mean square errors are below 1 89%; and the reconstructed series has a nonlinear relation to the dryness and wetness grades series. It means that the reconstructed series is reliable. The reconstruction of the moving average precipitation field series laid a foundation for researching the regularities of drought and flood evolution.