新疆春季气温异常的区域特征

利用新疆52个测站1961～2000年3～5月逐日平均气温资料，采用旋转经验正交展开（REOF）方法对新疆春季气温场进行客观分区，分析了各区域春季气温的不同时间尺度变化趋势。结果表明：新疆春季气温场可分为3个区域，北疆区和南疆区的长期变化呈下降趋势，而东疆区呈上升趋势；各区域存在明显不同的年际、年代际方差构成和多尺度振荡周期。

Regional Features of Spring Temperature Anomaly in Xinjiang

Using the temperature data at 52 observational stations from 1961 to 2000,the Xinjiang spring temperature field is divided objectively into 3 regions by rotated empirical orthogonal function(REOF)method.Based on this,the long-term trend in different time scale of each region spring temperature is analyzed.Results indicate that the spring temperature field in 3 regions have distinct characteristics of interdecadal change in the recent 40 years,and there is obvious area difference:the long-term trend of north area' s and south area' s spring temperature is decreasing,but that of east area' s is markedly ascending.The interannual(interdecadal)variance construct and variation period in 3 regions exhibit remarkable diversity.