大气科学学报2012，Vol.35Issue(3)：295-303,9.
中国冬季气温异常EOF分析的改进
Improvements of empirical orthogonal function analysis for winter temperature anomaly over China
摘要
Abstract
Temperature anomaly series at 160 stations of China in winter（ December,January and Febru- ary） from 1951 to 2010 are processed by the station homogeneity adjustment scheme. The adjusted se-ries for dealing with the variance heterogeneity distribution caused by station network heterogeneity are more effective. EOF（empirical orthogonal function） analysis method is used to study the original and adjusted temperature anomaly series. Results show that： 1 ） There is better organization for high absolute value areas of the first two typical fields of the adjusted data than those of the original data because the high absolute value areas of the typical fields locate mainly in the three north region（ Northwest China, North China and Northeast China） and the Tibetan Plateau ,which are consistent with the high value ar- eas of mean square deviation field. 2） The evolution features of main mode time coefficients of before and after adjustment are similar （rh≥0.886,h=^-1,2） ,but the variance contribution of linear and inter-decadal components of the first two time coefficients for the adjusted data much more focus on the first mode. 3 ） The linear components of the first typical fields and their time coefficients for the adjusted data can display the main strong warming areas over China in winter during the past 60 years, and their inter-decadal components are more consistent with the evident interdecadal variation areas over China than those of the original.关键词
中国160站站网/站网均匀化订正/冬季气温异常/EOF分析改进Key words
160-station network of China/network homogeneity adjustment/air temperature anomaly inwinter/improvement of EOF analysis分类
天文与地球科学引用本文复制引用
周国华,罗小莉,王盘兴,李丽平,谢瑶瑶..中国冬季气温异常EOF分析的改进[J].大气科学学报,2012,35(3):295-303,9.基金项目
国家重点基础研究发展计划项目 （）
公益性行业（气象）科研专项（GYHY（QX）200806009 （）
GYHY（QX）201006038 （）
GYHY（QX）20L006020） （）
江苏高校优势学科建设工程资助项目 （）
