摘要
对采自天目山的柳杉树轮进行交叉定年后 ,得到树轮的δ1 3C年序列。将δ1 3C年序列去除大气 CO2 的影响 ,保留其高频振荡部分。利用华东地区部分气象站的降水资料 ,通过主成份分析 ,分析了降水与树轮δ1 3C之间的关系。考虑滞后效应 ,利用回归方法重建了过去一百多年来的华东地区不同时段的降水序列 ,并分析其变化特征。
The δ 13 C time series obtained from trees in the Tianmu Mountains of Zhejiang Province contain high frequency variations and a long term decrease trend .By removing the long term decrease trend related to the δ 13 C variation with atmospheric CO 2,it is found that the high frequency variation is determined by the precipitation.Relation between the precipitation and the δ 13 C is analysed using PCA in terms of precipitation data in east China.The multiple regression method is employed to reconstruct the historical precipitation in east China,with a view to analyze the climatic change of centuries and evolution trend.
出处
《南京气象学院学报》
CSCD
北大核心
2001年第3期350-355,共6页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金项目 49771 0 0 1
