摘要
利用1961—2013年中国743个测站的逐日气温资料、NCEP/NCAR再分析资料,采用EOF分解、相关、回归、合成等方法分析了华南冬季气温异常的气候特征及其与同期大气环流和前期海温的关系。结果表明,华南冬季气温总体一致性偏高,近52年来华南冬季平均气温以0.26℃/(10 a)的速率上升,但显著低于全国平均的冬季增温速率,并在1989年发生升温突变。华南冬季平均气温具有显著的年际和年代际变化。当西伯利亚高压和乌拉尔山阻塞高压均偏弱、阿留申低压偏强、东亚大槽偏弱、太平洋副热带高压加强、冷空气活动偏弱时,有利于华南冬季气温偏暖。华南冬季气温在年际尺度上与ENSO和西伯利亚高压联系更密切,在年代际尺度上,华南冬季气温增暖趋势与鄂霍次克海海温偏低、东亚大槽减弱密切相关。
Based on the daily temperature data of 743 observational stations in China and NCEP/NCAR reanalysis data during 1961--2013, the climatic characteristics of winter temperature anomalies in South China and their relation to the concurrent atmospheric circulation and precedent SST were analyzed by EOF analysis, correlation, regression, and composite analysis, among others. The results showed that winter temperature in South China changes in high consistency, which increases obviously at a rate of 0.26 ℃/（10 a） in the past 52 years, much lower than the mean of China. The winter mean temperature in South China has an abrupt turn for rising in 1989, showing significant interannual and interdecadal variations. It is in favor of the winter temperature rising in South China when the Siberian High and the Ural Mountains blocking high are weaker, the Aleutian low is stronger, the East Asia trough is weaker, the Pacific subtropical high is stronger and the cold air activity is weaker. On the interannual scale, winter temperature in South China is closely related with the ENSO and Siberian High. On the interdecadal scale, there is a close correlation between increasing winter temperature in South China and cold SST of the Sea of Okhotsk and a weak East Asia trough.
出处
《热带气象学报》
CSCD
北大核心
2014年第6期1061-1068,共8页
Journal of Tropical Meteorology
基金
国家重大科学研究计划973项目(2014CB953900)
国家自然科学基金项目(41375081)
公益性行业(气象)科研专项(GYHY201106024)
华南区域气象中心科技攻关项目(GRMC2014M01)
广东气象局科技项目(2013B11)
广东省科技计划项目(2012A061400012)共同资助
关键词
气候学
统计特征
冬季气温
大气环流
海温
年际和年代际变化
climatology
statistical feature
winter temperature
atmospheric circulation
SSTinterannual and interdecadal variation
