关中地区近48年来气温时空变化特征

Characteristics of air temperature change in Guanzhong region in recent 48 years

通过关中地区29个气象站点1960-2007年的气温资料,采用气温倾向率、线性回归分析、距平分析、趋势分析、气温异常分析、小波分析和普通克里格插值等方法,对关中地区近48 a来的气温变化规律进行分析了研究。结果表明,关中地区近48 a来气温在整体上呈波动上升趋势,速率高于全球气温上升水平。近48 a来气温出现异常或极端的年份共有17 a,气温异常发生概率相对较高。气温变化存在显著的15~17 a和25~27 a的振荡周期。关中中部地区的多年平均气温最高,东部地区的气温上升最快,西部地区的气温最低、增长最慢。

Based on the temperature data from 29 weather stations between 1960 and 2007 in Guanzhong region,and use methods of climate tendency rate,linear regressive analysis,anomaly analysis,the climate trend analysis,temperature anomaly analysis,wavelet analysis,Kriging interpolation and so on,air temperature change in recent48 years were analyzed in this paper. The results show that,the air temperature of Guanzhong region fluctuates in the overall upward trend in recent 48 years,and the rate of which is higher than the level of global. There are 17 years that the temperature is abnormal or extreme in the past 48 years; The probability of anomalies is relatively high. There are obvious 15- 17 a and 25- 27 a oscillation periods of annual air temperature. The temperature is the highest in the midland region and it grows the fastest in the east region of Guanzhong,but it is the lowest and grows the slowest in the west region.