【摘要】 通过统计分析2001—2012年内蒙古地区的地面和高空观测资料，深入研究了内蒙古地区雨夹雪的时空分布特征。结果显示：(1)雨夹雪在内蒙古地区呈现出由东北向西南递减的分布趋势。(2)2008年雨夹雪最多，整体上存在5年为1个周期的年际变化规律。(3)雨夹雪主要集中在春秋两季，尤以春季3月份最多。(4)雨夹雪的日变化特征与温度变化高度一致。研究识别出影响雨夹雪分布的关键因素，并建立相应的预报指标体系，为提高雨雪转换季节的预报水平提供参考。更多还原

【Abstract】 This article conducted a statistical analysis of ground and highaltitude observation data in Inner Mongolia from 2001 to 2012, and deeply studies the spatiotemporal distribution characteristics of sleet in Inner Mongolia. The results showed that:(1) The distribution of sleet in Inner Mongolia showed a decreasing trend from northeast to southwest.(2) In 2008, there was the highest amount of sleet and sleet,with an overall interannual variation pattern of 5 years.(3) The sleet mainly concentrates in spring and autumn, with the highest concentration occurring in March.(4) The daily variation characteristics of sleet are highly consistent with temperature changes.The study identified the key factors affecting the distribution of sleet and established a corresponding forecasting index system,providing a reference for improving the forecasting level of rain and snow transition seasons.更多还原