| 黄渤海一次强风天气成因分析 |
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| 引用本文： | 韩永清,张少林,郭俊建.黄渤海一次强风天气成因分析[J].气象科技,2015,43(2):283-288. |
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| 作者姓名： | 韩永清 张少林 郭俊建 |
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| 作者单位： | 山东省气象台，济南 250031,山东省气象台，济南 250031,山东省气象台，济南 250031 |
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| 基金项目： | 山东省气象局预报员专项“山东春季北大风关键预报技术研究”（sdyby2012 18）、公益性行业（气象）科研专项（GYHY201306034）资助 |
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| 摘 要： | 利用常规气象观测资料和NECP/NCAR1°×1°再分析资料,对2012年12月5—6日山东黄渤海强风天气过程进行了天气动力学分析。结果表明:较强冷空气与地面气旋相互影响造成大的气压梯度是造成此次海上强风的直接原因。变压梯度使得强风爆发初期风速迅速加大。单站3h变压越大,变压梯度越大,风速的变化就越大。当地面盛行北风时,正变压梯度方向与风向一致,变压梯度对北风风速的增幅作用就越明显。中高层冷平流的补充下传作用和低层冷平流的扩散均对此次强风过程具有重要影响。
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| 关 键 词： | 黄渤海强风 气压梯度 变压风 冷平流 |
| 收稿时间： | 2014/3/29 0:00:00 |
| 修稿时间： | 2014/8/29 0:00:00 |
Causal Analysis of a Strong Wind Process over Yellow and Bohai Seas |
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| Han Yongqing,Zhang Shaolin and Guo Junjian.Causal Analysis of a Strong Wind Process over Yellow and Bohai Seas[J].Meteorological Science and Technology,2015,43(2):283-288. |
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| Authors: | Han Yongqing Zhang Shaolin and Guo Junjian |
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| Institution: | Shandong Provincial Meteorological Service, Jinan 250031,Shandong Provincial Meteorological Service, Jinan 250031 and Shandong Provincial Meteorological Service, Jinan 250031 |
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| Abstract: | Based on the conventional observational data and NECP/NCAR 1°×1° reanalysis data, a strong wind process happened over the Yellow and Bohai Seas on 5 and 6 December 2012 is analyzed. Results show that there were three phases: the large scale baric gradient wind caused by cold air and surface cyclone led to the gale; the surface allobaric field and its gradient resulted in rapidly increased wind speed during the initial stage; the greater the 3 hour pressure change, the larger the allobaric gradient, the greater the change in wind speed. When the north wind prevailed, the positive gradient was consistent with wind direction, and the role of transforming speed growth was more obvious. The complement of high level cold advection and the diffusion of lower downstream cold advection have important influence on the course of the strong wind process. |
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| Keywords: | strong wind process pressure gradient allobaric wind cold temperature advection |
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