摘要
基于广西、广东、湖南和福建62个台站1979—2005年的前汛期平均总降水量,利用EOF分解方法,分析了华南前汛期降水的时空分布特征和时间分布特征.EOF分解显示前3个方差贡献比例为54.74%;第一特征向量场空间分布均为正值,方差贡献比例为32.49%,说明华南前汛期平均总降水量变化具有一致性,但是各特征向量场之间的差异明显;第一时间系数的变化等同于华南前汛期降水量距平的变化;第二、第三时间系数的变化有明显的年际变化特征.
Based on the data of the mean total precipitation of about 62 weather stations in Guangxi,Guangdong,Hunan and Fujian from 1979 to 2005,temporal and spatial distribution characteristics of pre-rainy season in South China are analyzed with EOF methods.EOF analysis shows that the ratio of the front 3 eigenvectors with total square error is 54.79%.The first eigenvector field is positive,and the variance contribution ratio is 32.49%,reflecting that the description of the mean total precipitation is consistency,but the characteristic of each eigenvector field is different.The change of the first temporal coefficient variation is analogous with the change of the annual average total precipitation anomaly of pre-rainy season in South China on all stations.The changes of the second and the third temporal coefficient variation have the obvious characteristics of interannual variation.
出处
《河南科学》
2012年第10期1511-1515,共5页
Henan Science
关键词
EOF
前汛期
方差贡献
特征向量场
时间系数
EOF
pre-rainy season in South China
variance contribution
eigenvector field
temporal coefficient
