近50年江西省雨凇过程气候特征分析

基于江西省83个常规气象站近50年雨凇观测资料，分析了江西省雨凇天气的时空分布规律。利用Gumbel分布函数，对全省历年雨凇过程的持续时间、影响范围和年雨凇天数等时间序列进行了重现期分析，并对2008年初江西省出现的持续低温雨雪冰冻天气进行了定量的分析评估。结果表明：①江西省雨凇主要出现在冬季，以2月为最多，春、秋季在高海拔站偶有发生；②全省雨凇发生概率以中部和北部鄱阳湖北段沿岸最多，赣东北、赣西北和赣南最少，山区多于平原和丘陵；③2008年初江西省出现的低温雨雪冰冻天气主要致灾因子是大范围、长时间的雨凇天气，其影响范围、持续时间之长均创近50年之最，雨凇过程持续天数之长超过100年一遇，影响范围之广超过30年一遇。

Climatic Characteristics of Glaze Weather in Jiangxi in Past 50 Years

Based on the glaze data of 83 weather stations,an analysis is made of the glaze weather processes in the past 50 years,and the temporal and spatial distribution of glaze is revealed.By means of the self-developed automatic weather information analysis methods,the historical glaze data are processed,and some key information is extracted,such as the dates of beginning and ending,durations and affected areas of glaze events.The reoccurrence period analysis of glaze is made of the durations,affected areas of gl...