| 2009年6月5日安徽致灾大风天气过程分析 |
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| 引用本文： | 李劲,顾松山.2009年6月5日安徽致灾大风天气过程分析[J].安徽农业科学,2010,38(14):7443-7445,7457. |
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| 作者姓名： | 李劲 顾松山 |
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| 作者单位： | 1. 南京信息工程大学,江苏南京,210044;安徽省气象台,安徽合肥,230031
2. 南京信息工程大学,江苏南京,210044 |
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| 摘 要： | 利用常规气象资料、红外卫星云图,结合新一代天气雷达资料,对2009年6月5日发生在安徽的致灾大风天气过程进行分析。此次大风过程是由发展强烈的强对流系统引起的,其产生于对流层中高层槽后干冷空气向南大范围扩散,低层辐合,大气层结非常不稳定,深层大气垂直风切变中等的背景下。高空冷平流和低空暖平流产生的对流不稳定是强对流天气系统形成的基本条件。低层存在干线和风向辐合为强对流发生提供了触发机制。对流风暴下部强烈冷性下沉气流形成了地面雷暴高压,雷暴高压与周边低压区之间较大的气压梯度是形成地面大风的主要原因。
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| 关 键 词： | 致灾大风 阵风锋 干线 海风锋 |
Analysis of a Disaster-causing Wind Process in Anhui on June 5th,2009 |
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| LI Jin et al.Analysis of a Disaster-causing Wind Process in Anhui on June 5th,2009[J].Journal of Anhui Agricultural Sciences,2010,38(14):7443-7445,7457. |
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| Authors: | LI Jin |
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| Institution: | LI Jin et al (Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044) |
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| Abstract: | Based on the routine upper-air and surface data,infrared satellite image and new generation weather radar data,a disaster-causing wind process in Anhui on June 5th,2009 was analyzed. The results showed that the synoptic background was featured by the southward invasion of mid-level troposphere dry and cold air behind the westward moving trough,lower level convergence,extreme unstable air and moderate vertical wind shear. High-altitude cold advection and low-altitude warm advection generated by convective in... |
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| Keywords: | Disaster-causing wind Gust front Dry line Sea breeze front |
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