| 2009年7月17日唐山地区强降水成因分析 |
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| 引用本文： | 张晓东.2009年7月17日唐山地区强降水成因分析[J].气象与环境学报,2011,27(1):48-53. |
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| 作者姓名： | 张晓东 |
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| 作者单位： | 唐山市气象局 河北 唐山 063000 |
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| 基金项目： | 河北省气象局科技发展基金 |
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| 摘 要： | 利用常规天气资料和NCEP/NCAR再分析资料,对2009年7月17日唐山地区暴雨天气过程进行分析.结果表明:强降水是暖湿空气向北输送与低层冷空气交汇引起的.降水前期,唐山地区中低层水汽强辐合为强降水提供了水汽条件.冷空气从底层侵入,抬升暖湿气流,低层暖锋锋生使对流不稳定性增大,上升运动加强,降水量增大.强降水区存在低...
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| 关 键 词： | 强降水 环流形势 物理量场 西南气流 切变线 湿位涡 |
| 收稿时间： | 2010-08-11 |
Analysis of severe precipitation on July 17,2009 in Tangshan, Hebei province |
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| ZHANG Xiao-dong.Analysis of severe precipitation on July 17,2009 in Tangshan, Hebei province[J].Journal of Meteorology and Environment,2011,27(1):48-53. |
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| Authors: | ZHANG Xiao-dong |
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| Institution: | Tangshan Meteorological Bureau, Tangshan 063000, China |
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| Abstract: | Based on the conventional meteorological data from weather station and NCEP/NCAR reanalysis data,the severe precipitation event in Tangshan on July 17,2009 was analyzed.The results indicate that the severe precipitation event happens because warm and wet air moves to the north and it gathers together with cold air in the low level.Strong vapor convergence in the middle and low levels is necessary prior to precipitation.Cold air invades from the bottom and uplifts the warm and wet current,warm front frontoge... |
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| Keywords: | Severe precipitation Circulation situation Physical field Southwest current Shear line Moist potential vorticity |
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