| "8·16"暴雨过程的湿位涡诊断分析 |
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| 引用本文： | 李新生,杨世刚,赵桂香. "8·16"暴雨过程的湿位涡诊断分析[J]. 山西气象, 2006, 0(2): 6-8 |
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| 作者姓名： | 李新生 杨世刚 赵桂香 |
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| 作者单位： | 山西省晋中市气象局 山西晋中030600(李新生)，山西省雷电防护监测中心 山西太原030002(杨世刚)，山西省气象台 山西太原030006(赵桂香) |
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| 摘 要： | 本文利用实况资料和T213输出资料,对发生在2005年8月16日～17日的华北暴雨过程进行了湿位涡数值诊断分析,结果表明,强降水落在湿相对位涡的负值中心附近,且湿相对位涡场的特征主要取决于其正压项的贡献。在暴雨出现前期,湿对称不稳定主要在高层,湿位涡的下传可能是产生暴雨的重要原因之一。湿位涡的负值中心与中低层涡度的增大及暴雨的增强存在密切的关系。
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| 关 键 词： | 湿位涡 暴雨 涡度 |
| 文章编号： | 1004-5732(2006)02-0006-03 |
| 修稿时间： | 2006-02-20 |
The Analysis of the Moist Potential Vorticity of the "8.16" Rainstorm Event |
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| Li Xinsheng,Yang Shigang,Zhao Guixiang. The Analysis of the Moist Potential Vorticity of the "8.16" Rainstorm Event[J]. Shanxi Meteorological Quarterly, 2006, 0(2): 6-8 |
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| Authors: | Li Xinsheng Yang Shigang Zhao Guixiang |
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| Abstract: | Using the live data and the output data of the model T312,the moist potential vorticity of the rainstorm occurred On August 16 2005 over North China is studied.The results show that the heavy rain exists nearby the negative center of moist relative potential vorticity,and the characteristics of moist relative potential vorticity field lie on the contribution of barotropic term.Before the rainstorm,the moist symmetry instability exists over the upper troposphere and the down-transmitting of moist potential vorticity is one of the main reasons.The relationship between the negative center of moist relative potential vorticity and the increasing of vorticity over middle and lower troposphere and the precipitation is very close. |
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| Keywords: | Moist geopotential Vorticity Rainstorm Vorticity |
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