| 2010年4月27日莱州湾大风过程诊断分析 |
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| 引用本文： | 尹尽勇,曹越男,赵伟.2010年4月27日莱州湾大风过程诊断分析[J].气象,2011,37(7):897-905. |
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| 作者姓名： | 尹尽勇 曹越男 赵伟 |
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| 作者单位： | 国家气象中心,北京,100081 |
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| 基金项目： | 公益性行业（气象）科研专项“黄渤海高影响天气预报中的关键技术研究”（GYHY201106006）资助 |
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| 摘 要： | 利用NCEP资料对2010年4月27日莱州湾大风过程进行了诊断分析。结果表明,气旋的爆发性发展导致气旋冷锋后部的锋生加强引发的变压梯度加大是造成此次莱州湾地区大风过程的直接原因。通过大尺度环境场分析,以及温度平流、涡度平流、高空急流、高层位涡异常的诊断分析,认为强的大气斜压性和其所伴随的冷、暖平流使高空槽发展;高低层涡度平流差异是地面气旋发展初期的主要因子;高空槽前急流轴向极一侧的非地转分量所引起的辐散有助于气旋发展;高层高值位涡下传激发了气旋性环流,造成地面气旋爆发性发展。
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| 关 键 词： | 莱州湾 气旋 大风 诊断分析 |
| 收稿时间： | 2010/12/3 0:00:00 |
| 修稿时间： | 2011/4/16 0:00:00 |
A Diagnostic Analysis of the Gale Process in Laizhou Gulf on April 27, 2010 |
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| YIN Jinyong,CAO Yuenan and ZHAO Wei.A Diagnostic Analysis of the Gale Process in Laizhou Gulf on April 27, 2010[J].Meteorological Monthly,2011,37(7):897-905. |
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| Authors: | YIN Jinyong CAO Yuenan and ZHAO Wei |
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| Institution: | National Meteorological Centre, Beijing 100081;National Meteorological Centre, Beijing 100081;National Meteorological Centre, Beijing 100081 |
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| Abstract: | The gale process which happened in Laizhou Gulf on April 27, 2010 was analyzed diagnostically by using the NCEP data. This study shows that the explosive extratropical cyclone strengthened the frontogenesis behind the cyclonic cold front, thus increased the pressure tendency gradient which was the main reason for this gale process. By analyzing the synopsis environmental field, the temperature advection, the vorticity advection, the high level jet stream and the anomaly of the high level potential vorticity diagnostically, it is concluded that the strong barocline and the accompanied cold and warm advections made the high level trough develop. In the initial stage the vorticity advection difference between the high and low levels played an important role in the surface extratropical cyclone development. Then the cyclone developed further because of the divergence caused by the ageostrophic components to the left of the jet stream in front of the trough. The downward propagation of the potential vorticity on top of the troposphere triggered the surface cyclonic current and thus the cyclone developed explosively. |
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| Keywords: | Laizhou Gulf cyclone gale diagnostic analysis |
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