1960—2011年甘肃省夏季极端高温事件的空间特征分析  

Analysis on Spatial-Temporal Features of Extreme High Temperature Event in Summer in Gansu Province of China during 1960-2011

作　　者：蔡文香[1] 卢万合[2] 刘吉平[2] 

机构地区：[1]对外经济贸易大学国际经济贸易学院,北京100029 [2]吉林师范大学旅游与地理科学学院,吉林四平136000

出　　处：《农业灾害研究》2016年第3期38-42,共5页Journal of Agricultural Catastrophology

基　　金：国家社会科学基金重大项目(11&ZD167);对外经济贸易大学优秀博士学位论文培育基金资助

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。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.

关 键 词：极端高温事件 空间特征 夏季 甘肃省 

分 类 号：P467[天文地球—大气科学及气象学]