欧亚地区植被变化特征分析

Analysis of the Characteristics of Vegetation Changes in Eurasia

利用1982—2002年的LAI资料,采用EOF、最小二乘法等方法,研究了欧亚中高纬地区春、夏季植被的变化情况。分析结果表明,近20年来,欧亚地区春季植被变化最显著的地区在东欧平原和西西伯利亚平原;欧亚地区春季植被异常有"全区一致型"、"东西两端与中间差异型"和"东西差异型"3种模态;欧亚地区夏季植被异常有"全区一致型"、"东西两端与中间差异型"两种模态;总体来看,近20年欧亚地区植被呈现增多的趋势。

Based on the Leaf Area Index（LAI） 1982—2002,changes of vegetation in Spring and Summer over Eurasia were analyzed.The result indicated that the vegetation in the East European Plain and the West Siberia Plain had changed distinctly.The vegetation over Eurasia in spring had three modes,the same type over the area,the type of difference between the intermediate and East/West ends,and the type of difference between East and West.The vegetation over Eurasia in Summer had two modes,the same type over the area,the type of difference between the intermediate and East/West ends.The vegetation over Eurasia keeps increasing in these years.