Anomalous characters of 2009/2010 winter (from lst November to next 31 st March) climate in northern Xinjiang were quantitatively analyzed based on the observations of 43 meteorological stations in 1961-2010 in terms of extreme precipitation and temperature events defined by WMO.The results show that in the 2009/2010 winter, precipitation in northern Xinjiang was heavy, snow cover was thick with a long duration, changes in temperature were very large, and several meteorological variables describing precipitation and snow cover broke their historical extremes; extreme events was characteristic of high frequency, wide spatial range, and the coexistence of extreme cold and warm events.Under the large scale background of climate wanning, the occurrence of such extreme climate events that brought about heavy snow, thick snow cover, and severe disasters in the 2009/2010 winter has been seldom seen in northern Xinjiang, which indicates the diversity and complicity of extreme climate events.%利用新疆北部43个气象观测站资料,引用异常气候事件和极端气候事件的判别标准,定量分析了2009/2010年冬季新疆北部的异常气候特征,总结了这一阶段的降水、气温的极端事件特征.分析表明,新疆北部2009/2010年冬季降水量大,积雪厚,积雪时间长,气温变化幅度大,多种表征降水和积雪的气象要素突破历史极值;极端事件发生频次高、范围广,极端冷事件与暖事件并存.在全球气候变暖的大尺度背景下出现降雪如此大、积雪如此厚,灾害如此重的极端气候事件,在新疆实属罕见,这也凸显了极端气候事件的多元性和复杂性.
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