我国气温长期变化的区域特征
投稿时间:1996-01-23  修订日期:1996-07-28  点此下载全文
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作者单位
辛若桂 南京气象学院应用气象学系, 南京 210044 
屠其璞 南京气象学院应用气象学系, 南京 210044 
基金项目:中国气象局八五重点课题“短期气候变化预测理论和方法研究”资助
中文摘要:采用旋转经验正交展开(REOF)的方法,对我国160个测站39年(1951~1989)的年平均气温场和冬、夏季平均气温场分别作了空间分型。得到年和夏季平均气温场均可分为7个区;冬季则分为4个区。同时对有长期观测资料区的主成分进行了多元回归延长。研究表明,冬、夏季及年平均气温场各区之间近40年来的差别较大,我国大部分地区均有增温趋势;但在四川盆地(年平均气温场)、长江中下游(夏季平均气温场)则表现为降温趋势。近百年来我国的气温变化趋势及位相与北半球一致,40年代前后为高温期,70年代为低温期。
中文关键词:旋转经验正交展开  气温  变化趋势  区域特征
 
REGIONAL FEATURES OF LONG-TERM CHANGESIN TEMPERATURE OVER CHINA
Abstract:1951~1985 annual,winter and summer mean temperatures of 160 stations over China are REOF-invest igated with the resulting fields spatialy classified,leading to 7 segments for both the yearly and summer temperature compared to 4 for the winter mean,and multivariate regression extension is conducted of principal components for the areas with long-range observations.Evidence suggests greater difference in these mean fields among the different regions for the past 4 decades,indicating a warming trend in much of the country as opposed to Sichuan basin(annual average temperat ure)and mid-lower Chang jiang valleys(summer mean field),It is found that the temperature trend and phase over China agree with those in the Northern Hemisphere,disclosing a high(low)temperature regime around the 1940s(1970s).
keywords:rotated empirical orthogonal function(REOF)  temperature  changing trend  regional feature
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