利用1961-2010年四川141个气象观测站逐日气温观测资料， 分析了四川近50年的高温变化规律及其影响。结果表明， 50年来四川高温初日表现为提前趋势， 每10年提前1.2天； 高温终日则表现为推迟趋势， 每10年推迟1.8天； 高温日数总体呈显著增加趋势， 每10年增加0.7天； 高温最长持续日数总体也呈显著增加趋势， 每10年增加0.3天。从区域分布上来看， 50年来四川盆地南部是高温天数增加、 强度增强最显著的区域； 盆地西部、 中部地区是高温天数增加和强度增强趋势第二显著的区域。20世纪90年代以来， 盆地南部高温天气显著增多、 增强， 大气降水明显减少， 高温干旱灾害严重； 盆地西部、 中部地区高温天气灾害增多、 增强的同时， 伴随着大气降水的显著减少， 区域水资源形势严峻。
Abstract: Based on the daily temperature data of 141 stations in Sichuan from 1961 to 2010, variation features of the high temperature and the impact were analyzed. The results show that, from 1961 to 2010, the occurrence time of the first high temperature day in Sichuan had shifted to an earlier date with a speed of every 10 years ahead of 1.2 d, and the occurrence time of the last high temperature day had shown a postponed trend of every 10 years to defer 1.8 d. The high temperature days showed a significant increasing trend of every 10 years to increase 0.7 d, and the longest continuous days of the high temperature also showed a significant increasing trend, with an increase of 0.3 d every 10 years. For the whole Sichuan Province, during the past 50 years, the southern part of Sichuan Basin is the region where the high temperature days and the intensity showing the most significant increase trend, and the area of the western and central part of the Basin is the second obvious region. Since the 1990s, to the southern region of the Basin, the significantly increased and enhanced high temperature weather and obvious reduced precipitation had led to more frequent high temperature and drought disaster with more seriously affect; To the western and central region of the Basin, the obvious increased and enhanced high temperature weather and signicantly reduced precipitation had led to a grim regional water resources situation.
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