中文摘要：

基于22个气象站点逐日地面气温数据,以日最高温度（DMT）35℃以上和38℃以上的极端高温事件（EHTE）的发生频次作为研究指标,运用空间自相关方法,分析了甘肃省1960—2011年夏季极端高温事件的空间特征。结果表明,35℃以上极端高温事件的发生频次在空间上存在着明显的正相关,且聚集程度不断增强,＂低-低＂区有12个,＂高-高＂区3个,＂低-高＂区3个,＂高-低＂区4个,在甘肃省最西端存在1个显著＂高-高＂区,西南部存在2个相邻的显著＂低-低＂区,最南端存在1个显著的＂高-低＂区。38℃以上极端高温事件的发生频次在空间上存在着明显的正相关,＂低-低＂区域14个,＂高-高＂区有2个,＂低-高＂区域3个,＂高-低＂区域为3个,在最西端存在1个显著的＂高-高＂区,甘肃西南部存在1个显著的＂低-低＂区。

英文摘要：

Based on the daily temperature data at 22 meteorological stations,the occurrence frequencies of extreme high temperature event（EHTE） which daily maximum temperature（DMT） exceeding 35℃ and 38℃ were computed respectively as studying targets. Employing the methods of M-K test, sliding ttest, wavelet analysis, and spatial autocorrelation, we explored the spatial and temporal variability of EHTE of Gansu Province in the period 1960-2011. The results were as follows： The occurrence frequencies of EHTE which DMT exceeding 35℃ existed significant positive and increasing correlations in space.There were 12 ＂low-low＂ areas, 3 ＂highhigh＂ areas, 3 ＂low-high＂ areas, and 4 ＂high-low＂ areas. In addition, there was 1 significant ＂high-high＂ area in the west of Gansu Province, 2 adjacent significant ＂low-low＂ areas in the south-west, 1 significant ＂high-low＂ area in the south.The occurrence frequencies of daily maximum temperature exceeding 38℃ existed significant positive correlation in space. There were 14 ＂low-low＂ areas, 2 ＂high-high＂ areas, 3 ＂low-high＂ areas,and 3 ＂high-low＂ areas. There were 1 significant ＂high-high＂ area in the west,and 1 significant ＂low-low＂ area in the south-west of Gansu Province.