气象2017，Vol.43Issue(6)：756-761,6.DOI:10.7519/j.issn.1000-0526.2017.06.012
一种浙江省冻雨落区的推算方法
A New Method of Calculating Falling Zone of Freezing Rain in Zhejiang
摘要
Abstract
In 2008 ,the thick ice-coating caused by the severe freezing rain covered power transmission line in Zhejiang,leading to enormous damages to Zhejiang power grid.However,only one third of the weather stations observed the glaze with a short duration.In this paper,two severe freezing rain processes which occurred in 2008 and 2013 were analyzed using the global reanalysis data ERA-Interim and the disaster re-cords of ice-coating on Zhejiang power grid.The results show that there are three layers of cold-warm-cold with the warm layer's temperature above 0℃ during the heavy freezing rain process in Zhejiang Province. In Zhejiang,the liquid water falling from the warm layer would be frozen into ice particles because the temperature in warm layer is lower and the thickness of the bottom ice layer is thicker.Sometimes,the ground temperature is above 0℃,so rain would be observed at weather stations during freezing rain. However,the thickness of bottom ice layer become thinner at high elevation,then tiny liquid water can be frozen into ice particles after it passes through the bottom ice layer.The freezing rain can be found mostly above 400 m elevation of central Zhejiang and above 600 m elevation of southern Zhejiang.According to thefreezing rain characteristics in Zhejiang,the falling zone of freezing rain can be calculated based on the global reanalysis data,and the results match the disaster records of ice-coating well.In general,this is a new method for freezing rain monitoring and forecasting,especially for some mountainous provinces like Zhejiang.关键词
浙江省/冻雨/雨凇/再分析资料/冻雨落区Key words
Zhejiang Province/freezing rain/glaze/global reanalysis data/falling zone of freezing rain分类
天文与地球科学引用本文复制引用
康丽莉,邓芳萍,岳平,姜文东,王灿灿..一种浙江省冻雨落区的推算方法[J].气象,2017,43(6):756-761,6.基金项目
浙江省气象局科技项目(2013ZD09)和浙江省电力公司科技项目(微气象数据的架空线路单点覆冰模型研究及分析)共同资助 （2013ZD09）
