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台风涡旋自组织过程的研究 【作者】滕代高 【导师】罗哲贤

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【作者】滕代高导师罗哲贤
Y*h#Go~'r5ox0【作者基本信息】南京信息工程大学,气候系统与全球变化,2007年,博士水利论文v,jY7Gh{l*CP/ug

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B&U8^#L&Od4]Pv0【中文摘要】 涡旋自组织是2003年国际涡旋动力学会议的第一优先课题。在涡旋自组织动力学框架内,目前对双涡自组织过程、多涡自组织过程、不同初始涡参数对涡旋自组织的影响、多尺度涡旋自组织过程、涡旋自组织的可能机制,以及涡旋自组织过程的复杂性和多样性等的研究已取得了一系列的成果。在此基础上,本文通过数值试验和诊断分析方法对台风涡旋自组织过程做了进一步的研究。得到以下主要结果:首先,用PSU/NCAR第五代中尺度数值天气预报模式MM5(V3),实施了10个数值试验。试验3中,没有引进一个半径为80km的小涡旋,两个初始分离的半径为500km的涡旋,一边互旋,一边相互排斥,两个涡中心之间的距离不断加大。试验8中,引进了一个半径为80km的小涡旋,其它条件同试验3,两个初始分离的涡旋一边互旋,一边相互逼近,经自组织形成了一个由内区和螺旋带组成的类似于台风环流的较大尺度的涡旋。其次,选取近年来对我国造成重要影响的3个典型台风个例,分析涡旋自组织与台风形成的问题。3个台风个例的形成过程可以分为两类,其中,0505号台风“海棠”和0601号台风“珍珠”的形成主要是与双涡自组织有关;而0515号台风“卡努”的形成过程...更多则与多涡自组织过程相联系。第三,台风暴雨的增幅受诸多因素的影响,相应地对台风暴雨增幅的物理成因也存在多种解释。本文分析了涡旋自组织过程与0604号强热带风暴“碧丽斯”暴雨增幅的关系。得出:涡旋自组织是此次台风暴雨增幅的主要原因之一。本文在涡旋自组织动力学框架内,基于已有研究成果,通过数值试验和诊断分析方法进一步研究了台风涡旋自组织的问题,所得结果在台风复杂精细结构理论的指引下对研究台风的形成以及台风暴雨增幅提供了一个新的思路。  还原水利论文){'~@:pe/HR8d/t

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【英文摘要】 The vortex self-organization is the priority research subject of the internationalvortex dynamic conference in 2003. In the context of vortex self-organizationdynamics, there are some achievements for the double-and multi-vorticesself-organization, the effect of diffirent initial vortex parameters on the vortexself-organization, multi-scale vortex self-organization process, and complexity anddiversity of self-organization presently. Based on these achievements, further studieson the typhoon vortex self-organization have been made by numerical simulation anddiagnostic methods. The main results as follows:Firstly, based on the MM5, ten numerical experiments have bee made. Inexperiment 1, there is no a small vortex with a radius of 80kin, and the two separatedmeso-scale vortices with a radius of 500km exclude from each other duringco-rotation, and finally, the distance between the two meso-scale vortices increases.There are a small vortex and two meso-scale vortices in the initial field o...更多f experiment2. The only difference between Experiment 2 and 1 is that a small vortex is added inthe initial field of experiment 2. The aim of experiment 2 is to study two separatedvortices in initial field approach each other during co-rotation, and then self-organizeinto a typhoon-like and larger-scale vortex consisting of inner area and spiral bands.Subsequently, we choose 3 typhoon cases which produce heavy disaster on Chinato study the effect of the vortex self-organization on the typhoon formation withdiagnostic method. They can be divided two categories for the processes of 3 typhooncases formation. The double vortices self-organization process controls the formationsof the number 5 typhoon named Haitang in 2005 and the number 1 typhoon namedChannun, and the formation processes of the number 15 typhoon named Khanun in2005 are manipulate by the process of multi- vortices self-organization.Finally, the role of the vortex self-organization between meso- and small-scalevortices and storm vortex in the amplification of the rainstorm for the 4th stormnamed Bilis in 2006 has been analyzed. The diagnostic results of relative vorticiy,vertical velocity, and TBB of FY2C show that the interaction between storm and several mesoo and small-scale vortices in southwest of Bilis storm is one of the mainreasons resulting in the dramatic increase of torrential rain related to Bilis storm.The study on the questions about typhoon's formation, abrupt amplification oftyphoon's rainstorm just start in the context of the theories of typhoons's fine andsophisticed structure and vortex self-organization dynamics. The present dissertationjust offers preliminary results, which does not cover all the issue of typhoon vortexself-organiztion involving many sophisticated physical mechanisms. We will continuemake further research on this topic in the future work.  还原水利论文7K!Y8lP1k s Ku

:U#{%J)x?0【中文关键词】 涡旋自组织; 台风形成; 暴雨增幅
+lqh!?N"B^G Y0【英文关键词】 vortex self-organization; typhoon formation; rainstorm amplification水利论文e2O/] SAL(S(h A3O
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TAG: 导师 台风 涡旋 罗哲贤 滕代高
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