一次冷涡背景下强对流不稳定条件的成因分析

李云静; 张建春; 王捷纯; 方纯纯

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DOI:10.7519/j.issn.1000-0526.2013.02.010

气象:2013,39(2):210-217

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一次冷涡背景下强对流不稳定条件的成因分析

李云静^1,2, 张建春³, 王捷纯⁴, 方纯纯²

(1.北京大学物理学院大气与海洋科学系，北京 100871;2.民航东北地区空中交通管理局，沈阳 110043;3.民航天津空管分局，天津 300300;4.广州气象卫星地面站，广州 510640)

Causative Analysis of Strong Convective Unstable Conditions Under a Cold Vortex

LI Yunjing^1,2, ZHANG Jianchun³, WANG Jiechun⁴, FANG Chunchun²

(1.Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871;2.Air Traffic Management Bureau of Northeast CAAC, Shenyang 110043;3.Air Traffic Management Subbureau of CAAC, Tianjin 300300;4.Guangzhou Meteorological Satellite Ground Station, Guangzhou 510640)

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投稿时间：2012-09-03 修订日期：2012-11-18

中文摘要: 利用常规观测资料及NCEP再分析资料，在分析环流背景、探空资料的基础上，通过选取不同的高度和温度，对比研究四种CAPE以及CAPE场与地面要素场的关系，对发生在辽宁沈阳的一次冷涡背景下的强对流天气进行不稳定条件成因分析。结果表明，水汽潜热是不稳定能量的主要组成部分，冷涡背景下低层暖湿平流、高层冷干平流有利于不稳定能量的累积，从而导致强对流天气的发生;对流温度CAPE可以反映午后发生强对流所必需的不稳定能量，对强对流天气预报具有一定指示意义。

中文关键词: 强对流，不稳定条件， CAPE，冷涡

Abstract:Using conventional observation data and NCEP reanalysis data, the causes for unstable conditions of a strong convective weather under the background of the cold vortex in Shenyang City of Liaoning Province were analyzed by studying four kinds of CAPE and the relationship of CAPE field and surface meteorological factors. The results show that the water vapor latent heat is the main part of the unstable energy. Under the background of the cold vortex, the low level warm and moist advection, and high level cold and dry advection were advantageous to unstable energy accumulation, which leads to the occurrence of strong convective weather. The convective temperature CAPE can refect the unstable energy required by the afternoon strong convective occurrence, and it has a certain significance to the forecast of strong convective weather.

keywords: strong convection, unstable conditions, CAPE (convective available potential energy), cold vortex

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基金项目:国家科技支撑项目(2008BAC37B00)，公益性行业(气象)科研专项（GYHY200906003），国家自然科学基金（41075011）资助

作者	单位
李云静	北京大学物理学院大气与海洋科学系，北京 100871 民航东北地区空中交通管理局，沈阳 110043
张建春	民航天津空管分局，天津 300300
王捷纯	广州气象卫星地面站，广州 510640
方纯纯	民航东北地区空中交通管理局，沈阳 110043

Author Name	Affiliation
LI Yunjing	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871 Air Traffic Management Bureau of Northeast CAAC, Shenyang 110043
ZHANG Jianchun	Air Traffic Management Subbureau of CAAC, Tianjin 300300
WANG Jiechun	Guangzhou Meteorological Satellite Ground Station, Guangzhou 510640
FANG Chunchun	Air Traffic Management Bureau of Northeast CAAC, Shenyang 110043

引用文本：
李云静,张建春,王捷纯,方纯纯,2013.一次冷涡背景下强对流不稳定条件的成因分析[J].气象,39(2):210-217.
LI Yunjing,ZHANG Jianchun,WANG Jiechun,FANG Chunchun,2013.Causative Analysis of Strong Convective Unstable Conditions Under a Cold Vortex[J].Meteor Mon,39(2):210-217.