| 一次冷空气强风的成因分析 |
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| 引用本文： | 王雷.一次冷空气强风的成因分析[J].海洋预报,2005,22(4):96-101. |
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| 作者姓名： | 王雷 |
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| 作者单位： | 舟山市气象局,浙江,舟山,316004 |
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| 摘 要： | 文章分析了2004年12月底的一次冷空气强风过程,揭示了冷空气南下与东海低压的发展造成的气压梯度、高低空较强的冷平流以及中低空辐合辐散差异引起的动力强迫下沉作用所造成的动量下传是造成本次猛烈强风的主要原因.最大强风发生区域和发生时间既与低层和中层700hPa分别转为辐散和辐合中心对应,又与中低层700hPa以下正好处于下沉速度中心附近对应.
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| 关 键 词： | 冷空气大风 高空横槽 东海低压 物理量场 动量下传 |
| 文章编号： | 1003-0239（2005）4-0096-06 |
| 收稿时间： | 2005-02-08 |
| 修稿时间： | 2005-02-08 |
THE REASON ANALYSIS OF A CASE OF STRONG COLD AIR GALE |
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| WANG Lei.THE REASON ANALYSIS OF A CASE OF STRONG COLD AIR GALE[J].Marine Forecasts,2005,22(4):96-101. |
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| Authors: | WANG Lei |
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| Institution: | Zhoushan Meteorological Bureau, Zhejiang Province 316004 China |
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| Abstract: | In this paper a strong cold air gale process occurred at the end of December in 2004 is analyzed. It reveals that the main reason of this strong gale is the pressure gradient caused by cold air and the depression in East China Sea, the strong cold temperature advection in upper and lower layer and the middle momentum transportation downward because of the dynamic forcing descending caused by the divergence at the lower lever and the convergence at the middle lever. The occurring area and time of the maximal ground gale are just in the area and at the time of the divergence and descending center at the lower level below 700 hPa and the convergence center at the 700hPa lever. |
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| Keywords: | Cold air gale Horizontal trough at the upper level Depression in East China Seat Physical elements Momentum transportation downward |
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