| 北上低涡引发辽宁历史罕见暴雪天气过程的分析 |
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| 引用本文： | 刘宁微,齐琳琳,韩江文.北上低涡引发辽宁历史罕见暴雪天气过程的分析[J].大气科学,2009,33(2):275-284. |
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| 作者姓名： | 刘宁微 齐琳琳 韩江文 |
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| 作者单位： | 1.中国气象局沈阳大气环境研究所, 沈阳,110016 |
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| 基金项目： | 国家自然科学基金资助项目40605016 |
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| 摘 要： | 2007年3月3～5日, 辽宁大部分地区普降大到暴雪。本文对此次暴雪过程及其成因进行了初步分析, 通过对各种资料, 包括营口多普勒雷达资料的分析, 认为500 hPa南北支槽合并带来的强冷暖空气交汇及北上低涡的发展是产生暴雪天气的主要背景; 地面气旋北上带来的南来倒槽是产生暴雪的天气特征; 低空急流输送水汽和低层上升运动是增强降雪强度的有利条件, 这一分析结果对预报暴雪天气具有指示意义。
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| 关 键 词： | 暴雪 低涡 槽 |
The Analyses of an Unusual Snowstorm Caused by the Northbound Vortex over Liaoning Province in China |
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| LIU Ningwei,QI Linlin and HAN Jiangwen.The Analyses of an Unusual Snowstorm Caused by the Northbound Vortex over Liaoning Province in China[J].Chinese Journal of Atmospheric Sciences,2009,33(2):275-284. |
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| Authors: | LIU Ningwei QI Linlin and HAN Jiangwen |
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| Institution: | 1.Institute of Atmospheric Environment, China Meteorological Administration, Shenyang,1100162.Institute of Aeronautical Meteorology and Chemical Defence, Equipment Agency of Air Force, Beijing 1000853.Shenyang Central Observatory, Shenyang 110016 |
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| Abstract: | The satellite,radar and NCEP data are used to analyze an unusual snowstorm over Liaoning Province during 3-5 March 2007. The analysis shows that the combination of south and north troughs at 500 hPa,the northbound vortex at 850 hPa and the cyclone at the surface are very favorable to the occurrence of snowstorm. The intense low level jets and ascending motion at 850 hPa are in favor of the moisture transportation and the intensification of snow. The low level jets and the convergence of wind may be consider... |
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| Keywords: | snowstorm vortex trough |
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