【摘要】 在全球变暖背景下，极端气候事件问题逐渐显著，岷江流域作为川滇生态屏障区的重要组成部分，受气候变化的影响较大，研究该流域极端气候事件时空变化规律，能为未来气象灾害防治等提供科学依据。基于1966—2018年岷江流域62个气象站点的气温资料，选用“气候变化检测和指标”专家组所确定的16个极端气温指数，采用一元回归方程、Sen斜率、反距离权重空间插值法和Mann-Kendall检验法分析极端气温指数的时空变化规律。结果显示：岷江流域极端气温事件存在明显的时间变化特征，并且变化趋势在空间分布上存在一定的差异性。结果表明：（1）岷江流域极端高温事件显著增加，极端低温事件显著减少；极端气温指数的突变年份主要集中在1990—2000年左右，其中极端低温指数均在突变后呈现显著下降趋势，极端高温指数、极值指数、其他指数中除了日较差指数，均在突变后呈显著上升趋势；（2）极端低温指数在流域内大部分地区呈下降趋势，平均年变化率为-0.98 d·（10a）^-1;极端高温指数、极值指数和作物生长期指数大部分地区呈上升趋势，其中极端高温指数上升趋势在流域内呈西低东高的分布，作物生长期指数在流域内呈北高南低的分布；日较差指数在流域上游地区呈下降趋势，中下游地区呈上升趋势。更多还原

【Abstract】 In the context of global warming, the issue of extreme climate events is becoming increasingly prominent. As an important component of the Sichuan Yunnan ecological barrier, the Minjiang River Basin is greatly affected by climate change. Studying the spatiotemporal variation patterns of extreme climate events in this basin can provide scientific basis for future meteorological disaster prevention and control. Based on temperature data from 62 meteorological stations in the Minjiang River Basin from 1966 to 2018, 16 extreme temperature indices determined by the "Climate Change Detection and Indicators" expert group were selected. The spatiotemporal variation patterns of extreme temperature indices were analyzed using univariate regression equation, Sen slope, inverse distance weight spatial interpolation method, and Mann Kendall test method. The result show that there was an obvious annual trend of extreme temperature events in the Minjiang River Basin, and there were certain differences in the spatial distribution of extreme temperature events. The result indicate that:（1） The extreme high temperature events and extreme low temperature events in the Minjiang River Basin increased significantly. The abrupt years of extreme temperature index were mainly concentrated around 1990-2000. After the mutation, the extreme low temperature index significantly decreased, while the extreme high temperature index, extreme value index, and other indices except for the schedule index all significantly increased.（2） The extreme low temperature index showed a decreasing trend in most areas of the watershed, with an average annual change rate of-0.98 d·（10a）^-1; The extreme high temperature index, extreme value index, and crop growth period index showed an upward trend in most regions, and the upward trend of extreme high temperature index showed a distribution of low in the west and high in the east within the watershed, while the crop growth period index showed a distribution of high in the north and low in the south within the watershed; The daily range index showed a downward trend in the upper reaches of the basin, and an upward trend in the middle and lower reaches.更多还原