2008年云南滇东北电线覆冰的气象条件

Meteorological Conditions of Wire Ice Coating in Northeastern Yunnan in 2008

通过对2008年1-2月云南滇东北电线覆冰(雨凇)气象条件的分析,得到:①2008年云南滇东北雨凇持续时间是有气象记录以来最长是的一年,所造成的电线覆冰灾害非常严重的;②雨凇持续时间与ENSO有密切对应关系;③2008年滇东北电线覆冰期间昆明准静止锋异常活跃,是最重要的影响天气系统;④2008年滇东北的电线覆冰是在气温偏低、降水偏小、风速不大(或静风)及空气较为潮湿的气象条件下发生的。电线覆冰的厚度与气温成显著负相关,与风速成显著正相关。

The meteorological conditions of wire ice coating in northeastern Yunnan in January and February of 2008 are analyzed. The following results are obtained： in 2008 is the longest in meteorological record and the second, there is a close relationship between the glazed The first, the glazed frost duration in northeastern Yunnan disasters caused by wire ice coating is very serious. The frost duration and ENSO. The third, the quasi-stationary front （KQSF） in Kunming is abnormally active during wire ice coating in northeastern Yunnan in 2008. It is the most important influencing synoptic system. The fourth, the wire ice coating in northeastern Yunnan in 2008 occurred under the condition of lower air temperature, less precipitation, lower wind speed and higher air humidity. There is a distinct negative correlation between wire ice coating thickness and the air temperature, and a distinct positive correlation between wire ice coating thickness and the wind speed.