长白山春季林火气候的主成分(PCA)分析

本文选用长白山地区27个国家气象站近30年资料,13项气候因子和1969—1982年的林火资料,用相关法筛选出8个因子进行主成分分析,得到三个新的综合因子,包含了原变量87.5%的信息。结果指出,影响春季林火的主导因子是最高气温和降水量,并划分出春季三类不同的林火气候区。

THE PRINCIPAL CONPONENT ANALYSIS OF FOREST FIRE CONCERNED SPRING WEATHER IN JILIN

we have been collected recent 30 years climatic data from 27 natio- nal climatic stations about 13 climatic factors and the record of forest fire from 1969 to 1982. Using those data the PCA method had been calculated Three new conponents contained 87.5% informations of the original variance has been selected. The result is shown that the lead- ing factors caused forest fire in spring are maximum temperature of year and precipitation Acording to the calculating result we may divi- ded into three climatic regions in where have the different hazard of forest fire in Jilin.