安徽农业科学Issue(18)：9802-9804,3.
2009年8月吉林省东南部霜冻天气分析
Analysis on Frost Weather in Southeast Jilin Province in August of 2009
摘要
Abstract
[Objective] The research aimed to analyze frost weather in southeast Jilin Province in August of 2009. [Method] Based on NECP reanalysis data and routine observation data, by using synoptic analysis and diagnosis methods, generation of the frost weather in southeast Jilin in August of 2009 was analyzed from circulation situation, weather factor characteristics and so on. [ Result] It was a strong cold air influence process with cold wave outbreak property. In prior period, upper situation was stable. It was high-temperature and rainless in Jilin. In later period, polar vortex and big trough deepened and developed, and strong cold air went south. After big trough and cold front moved eastward, cold air outbroke in the province. Generation condition of the frost weather in southeast Jilin was that East Asian big trough and strong cold front transited, and high altitude of Jilin was controlled by northwest airflow. 850 hPa temperature =4 ℃ in central east Jilin. Center intensity of the cold high reached 1 020 hPa, and it was just in central east Jilin. When control time of the cold air =36 h, rainfall < 10 mm in 48 h. [ Conclusion] Weather and factor conditions in the process had important significance for future frost weather forecast in summer.关键词
霜冻天气/强冷空气/吉林省东南部Key words
Frost weather/Strong cold air/Southeast Jilin分类
农业科技引用本文复制引用
云天,刘铮..2009年8月吉林省东南部霜冻天气分析[J].安徽农业科学,2012,(18):9802-9804,3.
