| 0205号台风"威马逊"北上过程中强度减弱缓慢的原因分析 |
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| 引用本文： | 徐燕峰,叶君武,林伟.0205号台风"威马逊"北上过程中强度减弱缓慢的原因分析[J].海洋预报,2003,20(3):1-6. |
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| 作者姓名： | 徐燕峰 叶君武 林伟 |
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| 作者单位： | 1. 南京大学大气科学系,江苏,南京,210093
2. 舟山市气象台,浙江,舟山,316000 |
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| 摘 要： | 0205号台风“威马逊”于7月初沿海北上影响浙江舟山。影响浙江舟山时台风中心气压仍有940hPa,在历史同期是少见的。本文初步分析认为,台风在北上过程中强度保持不变的原因是由于台风本身结构规则、尺度大,强而大的台风环流提供了广泛的辐合流入。台风外围深厚的暖湿水汽输送带为台风强度的维持提供了水汽和能量,台风强度维持与低层辐合高层辐散有关,高层辐散同时加剧了低层辐合。涡度场的对称分布,使水汽和能量向台风中心旋转,旋转风动能得以维持。弱的垂直切变和暖洋面的存在也是台风强度维持的原因之一。
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| 关 键 词： | 台风 强度 结构 辐合辐散 暖洋面 “威马逊” |
| 文章编号： | 1003-0239(2003)03-0001-06 |
| 修稿时间： | 2002年10月14 |
THE ANALYSES OF TYPHOON "RAMASUN" INTENSITY WEAKEN SLOWLY IN THE NORTHWARD COURSE |
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| XU Yang-feng,YE Jun-wu,LIN Wei.THE ANALYSES OF TYPHOON "RAMASUN" INTENSITY WEAKEN SLOWLY IN THE NORTHWARD COURSE[J].Marine Forecasts,2003,20(3):1-6. |
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| Authors: | XU Yang-feng YE Jun-wu LIN Wei |
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| Abstract: | Typhoon "Ramasun" effected Zhoushan in the early July, 2002When it went northward, it remained strong intensity. By analyzing typhoon structure itself and other surrounding situation, we found that typhoon regularly structure, large scale and strong typhoon circulation provided extensive convergence, necessary water vapor and energy by the warm and damp vapor transfer zone surrounding typhoon. Upper air divergence enhanced lower air convergence, symmetrical vorticity distribution made vapor and energy revolving to typhoon center. Weak vertical shear and warm sea surface are other reasons to remain the intensity of typhoon. |
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| Keywords: | typhoon intensity structure convergence and divergence warm sea surface |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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