| 基于GPS/Pwv资料的上海地区2004年一次夏末暴雨的水汽输送分析 |
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| 引用本文： | 杨露华,叶其欣,邬锐,黄宁立,徐秀芳.基于GPS/Pwv资料的上海地区2004年一次夏末暴雨的水汽输送分析[J].气象科学,2006,26(5):502-508. |
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| 作者姓名： | 杨露华 叶其欣 邬锐 黄宁立 徐秀芳 |
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| 作者单位： | 上海中心气象台,上海,200030 |
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| 基金项目： | 国家自然科学基金;国家科技部世博专项项目;上海市科委资助项目 |
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| 摘 要： | 本文应用GPS探测的可降水水汽资料Pwv对上海地区2004年一次夏末暴雨的水汽输送特征进行了分析。结果表明:此次暴雨过程的水汽输送路径有两条,一条是西南水汽输送路径,一条是东南水汽输送路径。指出边界层的偏东急流是此次暴雨过程的主要增雨机制。分析还表明:每30 min一次的GPS/Pwv资料能直观地、及时地反映大气中水汽的时间变化和空间变化;GPS/Pwv资料随时间的演变特征与降水有较好的对应关系;GPS/Pwv的散度资料可以反映大气中水汽的辐合、辐散分布情况。
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| 关 键 词： | GPS 可降水水汽 水汽输送 暴雨 |
| 收稿时间： | 2005-03-30 |
| 修稿时间： | 2005-09-26 |
ANALYSES OF WATER VAPOR TRANSPORT IN A HEAVY RAIN IN THE LATE SUMMER OF 2004 IN SHANGHAI BASED ON GPS/PWV DATA |
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| Yang Luhu,Ye Qixin,Wu Rui,Huang Ningli and Xu Xiufang.ANALYSES OF WATER VAPOR TRANSPORT IN A HEAVY RAIN IN THE LATE SUMMER OF 2004 IN SHANGHAI BASED ON GPS/PWV DATA[J].Scientia Meteorologica Sinica,2006,26(5):502-508. |
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| Authors: | Yang Luhu Ye Qixin Wu Rui Huang Ningli and Xu Xiufang |
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| Institution: | Shanghai Meteorological Center, Shanghai 200030 |
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| Abstract: | With the use of Precipitable Water Vapor(PWV) data from GPS,analyses were performed to study the features of water vapor transport in a heavy rain case that occurred during the late summer of 2004 in Shanghai.Results indicated that two paths of water vapor transport existed in the case;one is southwestwardly path in the synoptic-scale,the other is southeastwardly path in the meso-scale.Easterly jet stream in the boundary layer was a main mechanism of increasing rainfall.It is shown that GPS/PWV data with an time interval of 30 minutes reflected spatial and temporal changes of atmospheric vapor intuitionally and duly,the features of GPS/PWV changes had corresponding relations with the precipitation,the divergence of GPS/PWV showed the distributions of the convergence and divergence of atmospheric vapor. |
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| Keywords: | GPS Precipitable water vapor Vapour-transport Heavy rain |
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