| 梅雨锋低空急流发展过程中非地转风特征的合成分析 |
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| 引用本文： | 董加斌,斯公望.梅雨锋低空急流发展过程中非地转风特征的合成分析[J].科技通报,1998,14(6):413-418. |
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| 作者姓名： | 董加斌 斯公望 |
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| 作者单位： | 浙江省气象台!杭州310021(董加斌)，杭州大学地理系!杭州310028(斯公望) |
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| 摘 要： | 通过对 5次梅雨锋低空急流发展过程中非地转风的合成分析 ,证实低空急流 ( L L J)的发展存在着次地转阶段和超地转阶段 .次地转阶段是在它的发展期 ,主要表现在风场的 u分量上 ;超地转阶段是在它的成熟期和以后 ,其超地转性在成熟期主要表现在风场的 v分量上 ,成熟期以后减弱期则主要表现在风场的 u分量上 .指出梅雨锋低空急流发展是在先由地转风加强的条件下产生的 ,其发展机制与风场围绕地转风作惯性振荡的机制相似 .此外 ,还对 5次低空急流的成熟期与高空急流中心及 6小时降水中心的相对位置进行比较 ,从而发现以往关于低空急流在高空急流右侧发展、暴雨发生在低空急流左前侧等概念与事实不尽相符
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| 关 键 词： | 梅雨锋 合成分析 低空急流 非地转风 |
Composite Analysisabout Ageostrophic Wind in Development of the Low-level Jet Associated with Meiyu Front |
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| Dong Jiabin Zhejiang Meteorological Observatory,Hangzhou Si Gongwang.Composite Analysisabout Ageostrophic Wind in Development of the Low-level Jet Associated with Meiyu Front[J].Bulletin of Science and Technology,1998,14(6):413-418. |
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| Authors: | Dong Jiabin Zhejiang Meteorological Observatory Hangzhou Si Gongwang |
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| Institution: | Dong Jiabin Zhejiang Meteorological Observatory,Hangzhou 310 0 2 1 Si Gongwang Department of Geography,Hangzhou University,Hangzhou 310 0 2 8 |
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| Abstract: | A composite analysis of5cases has been carried out.The result identifies thatthere are subgeostrophic and supergeostrophic stages in the development of low- level jet.Subgeostrophic,which mainly shows in u- compo- nent,is in the developing stage of low- level jet.Supergeostrophic,which mainly shows in v- component,is in the mature stage of low- level jet,and it mainly shows in u- component in the decaying stage.The possible physical mechanism of the development of low- level jet is inertial oscillation of the wind field around the geostrophic wind. |
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| Keywords: | Meiyu front Compose analysis L ow- level jet Ageostrophic wind |
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