| 台风登陆背景下陕西两次大暴雨过程对比分析 |
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| 引用本文： | 侯建忠,陈小婷,刘瑞芳,雷斌.台风登陆背景下陕西两次大暴雨过程对比分析[J].成都信息工程学院学报,2011,26(5):494-500. |
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| 作者姓名： | 侯建忠 陈小婷 刘瑞芳 雷斌 |
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| 作者单位： | 陕西省气象台,陕西西安,710015 |
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| 基金项目： | 2011年中国气象局预报员专项资助项目(CMAYB2011-50) |
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| 摘 要： | 采用天气学、动力诊断等方法对2010年7月陕西出现两次大暴雨过程综合分析。目的在于揭示近海台风活动对陕西区域性暴雨作用和影响，结果表明：近海台风活动是影响造成两次大暴雨的一个关键因子。两次暴雨的水汽输送均由登陆后的台风低压环流东侧的偏南急流来实现，且以700hPa表现最为显著。前一次暴雨过程中热力条件和高层抽吸对增强上升运动和对流作用明显。后一次暴雨过程是因持续、深厚和稳定少动的河套低压自身不断发展加深的作用，加剧了上升运动发展，其上升运动区与暴雨区吻合较好。
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| 关 键 词： | 气象学 天气诊断分析 登陆台风 西南涡 河套低压 陕西大暴雨 对比分析 |
Comparative Analysis of Two Heavy Rainstorms in Shaanxi under Typhoon Landfalling Background |
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| HOU Jian-zhong,CHEN Xiao-ting,LIU Rui-fang,LEI Bin.Comparative Analysis of Two Heavy Rainstorms in Shaanxi under Typhoon Landfalling Background[J].Journal of Chengdu University of Information Technology,2011,26(5):494-500. |
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| Authors: | HOU Jian-zhong CHEN Xiao-ting LIU Rui-fang LEI Bin |
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| Institution: | (Shaanxi Meteorological Observatory,Xian 710015,China) |
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| Abstract: | Using synoptic analysis and dynamical diagnosis methods, a comparison between two heavy rainstorms occurred in Shaanxi in July 2010 is carried out in order to study the impact of landfalling Typhoon on rainstorms. The result shows that influence of typhoon landfalling is a key factor in causing both these two heavy rainstorms. Water vapor was transferred by southerly jet which located east of low pressure around typhoon in both cases and is most notable on 700hPa. Thermal conditions and upper-level pumping play an important role in enhancing ascending motion and convection in the first rainstorm. Continuous development and deepens of Hetao low pressure which is sustained, profound and stable aggravated the ascending motion which is the main cause of the later one. And its ascending mo- tion region was consistent with the heavy rain area. |
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| Keywords: | meteorology synoptic diagnostic analysis landfalling typhoon southwest vortex hetao low pressure heavy rainstorm in shaanxi province comparative analysis |
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