中国西部降水和树轮关系及传输函数探讨

THE RELATION BETWEEN PRECIPITATION AND TREE-RING IN THE WEST CHINA AND TRANSFORMATION FUNCTION

本文利用EOF展开,对我国西部树轮指数和降水场进行了讨论,分别计算了降水和树轮的第一、第二主成份的周期。结果表明我国西部树轮和降水在空间与时间上都有着较好的对应关系。在此基础上,通过稳健回归方法对树轮和降水的传输函数进行了研究。

In this paper, tree-ring indexes and precipitation of the west China are decomposed into space field and time coefficients by EOF method. On this basis,some features about space field and time coefficients of tree-ring indexes and precipitation using typical field and spectrum analysis are discussed. The results indicate that there is a good relation between tree-ring indexes and precipitation in the west China. Finally, the transformation function of time coefficients between tree-ring indexes and precipitation applying robust regression is devised.