张家界近50年气温变化特征分析

根据张家界市永定区观测站1961～2010年间年、季气温资料,运用线性回归、滑动平均、累积距平等分析方法,研究了永定区50年来气温变化特征。结果表明,近50年来永定区气温总体具有波动上升趋势,年平均气温增长速率为0.23℃/10a,期间以20世纪90年代中期为界限,体现为"前冷后暖"趋势,其中永定气候变暖主要是由冬季、春季和秋季增暖造成的,冬季增温速率最大,达0.28℃/10a。

Analysis on the Temperature Variation Characteristics in Zhangjiajie in Recent 50 Years

Acoording to temperature data collected from weather stations in Yongding District, Zhangjiajie City, using linear regression, mov- ing average and accumulative anomalies, the temperature variation characteristics in Yongding District in recent 50 years were studied. The re- suits showed that the average temperature rising at a rate of 0.23 ℃/10a. Specifically, the period before the mid-1990s was considerably col- der than the period since. The increase in temperature since the mid-1990s can be contributed into the non-summer seasons among which the increasing speed in winter is the highest at 0. 28 ℃/10a.