依据山西省1961-2012年17个气象站的逐日气温数据,运用Mann-Kendall突变检验法、EOF、线性趋势分析法,对52a来山西气温异常的时空变化特征进行了分析。结果显示:①研究时段内山西气温呈波动上升趋势,在1994年发生暖性气温突变;②山西省气温变化分布场具有明显的空间分异特征,主要表现为全区升温趋势整体一致。受地形影响,气温变化各自形成中心,呈地形影响型以及因受季风、纬度等不同因素影响的南北分布型;③山西省极端最低气温与极端最高气温均呈上升趋势,极端最低气温的上升速率高于极端最高气温,说明山西省极端最低气温的上升在全区的气温上升趋势中起主要作用。
Based on daily temperatures of the last 52 years from 17 climatic stations in Shanxi, the spatial and temporal variation characteristics of temperature anomalies were analyzed by using Mann-Kendall-abrupt-change test, the method of Empirical Orthogonal Function (EOF) analysis and linear trend analysis. The variation of the temperature in Shanxi presented the following characteristics over the study period. The temperature wavelike rising tendency had an abrupt change point in 1994 and showed a continuously warming trend since then. Although hav- ing a rising tendency in general over entire region, the distribution of the temperature presented an obvious spatial variations with varied terrain features. Under the influences of topography, monsoon and latitude, several tempera- ture centers were distributed from the south to the north. Both the extreme minimum temperature and extreme maxi- mum temperature in Shanxi had been rising over the study period and the increase of the extreme low temperature was higher than the increase of the extreme high temperature.