| 2013年初桂北寒潮天气过程分析 |
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| 引用本文： | 张凌云,李宜爽,王艺.2013年初桂北寒潮天气过程分析[J].气象研究与应用,2014,35(4):40-43. |
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| 作者姓名： | 张凌云 李宜爽 王艺 |
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| 作者单位： | 柳州市气象局,广西柳州,545001 |
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| 摘 要： | 运用Micaps资料和地面观测实况资料,对2013年1月3-5日桂北寒潮天气过程进行了诊断分析,结果表明：（1）此次寒潮天气过程的特点是降温快、回温慢,且过程日平均气温低;（2）此次寒潮过程的冷空气堆积过程完成后,是由横槽转竖引导槽后冷空气大举南下入侵广西,造成的桂北寒潮天气;（3）中暖下冷的逆温层结维持时间与降雪冻雨时段对应较好,逆温层结被破坏后,桂北的持续雨雪天气也宣告结束,气温开始逐步回升;（4）中低层水汽辐合及较强的槽前正涡度平流也是产生降雪的必要条件之一。
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| 关 键 词： | 横槽转竖 水汽辐合 中层逆温 |
Analysis on a cold weather process of northern Guangxi in early of 2013 |
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| Zhang Ling-yun,Li Yi-shuang,Wang Yi.Analysis on a cold weather process of northern Guangxi in early of 2013[J].Journal of Guangxi Meteorology,2014,35(4):40-43. |
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| Authors: | Zhang Ling-yun Li Yi-shuang Wang Yi |
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| Institution: | (Liuzhou Municipal Meteorological Service, Liuzhou Guangxi 545001) |
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| Abstract: | Based on the Micaps data and live data of ground observation,cold weather process on January3 - 5,2013 of north Guangxi are analyzed and diagnosed,the results show that：（1） the characteristics of this cold weather process are rapid cooling,slow rebounding and the low average daily temperature;（2） After the cold air accumulation process,the transverse trough turned vertical trough and the cold air behind trough moved southward and invade heavily,which led to the cold weather in north of Guangxi;（3） there is good correspondence between the holding time of thermal inversion layer and the time maintaining freezing rain and snow,after the inversion layer breaking up,the continuous rain and snow weather in north of Guangxi also came to an end,and the temperature began to gradually pick up;（4）the low-level moisture convergence and strong positive vortex advection before slot are also one of the necessary condition to snow. |
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| Keywords: | transverse trough turning vertical water-vapor convergence middle temperature inversion |
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