| 小尺度系统对涡旋自组织的影响 |
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| 引用本文： | 代刊,罗哲贤,滕代高.小尺度系统对涡旋自组织的影响[J].南京气象学院学报,2008,31(2):158-166. |
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| 作者姓名： | 代刊 罗哲贤 滕代高 |
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| 作者单位： | 1. 南京信息工程大学,江苏省气象灾害重点实验室,江苏,南京,210044
2. 南京信息工程大学,遥感学院,江苏,南京,210044 |
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| 摘 要： | 在涡旋自组织动力学的框架内，利用．厂平面准地转正压模式讨论小尺度涡旋系统对两个中β尺度涡旋的自组织过程的影响。4组数值试验表明：小尺度涡旋的存在，可能会改变双涡相互作用的终态，使原本不合并的两个涡旋组织起来；双涡相互作用的终态对小尺度涡旋的初始位置敏感；存在“Z”型敏感区域，当小尺度涡旋出现在这一区域时，就有可能改变双涡相互作用的终态；小尺度涡旋对双涡相互作用产生影响需具备4个条件，即初始位于敏感区内，有足够的强度，距离适当且生存时间足够长。
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| 关 键 词： | 涡旋 自组织 多尺度 |
| 文章编号： | 1000-2022(2008)02-0158-09 |
| 修稿时间： | 2006年12月22 |
Influences of a Small-Scale System on the Self-Organization of Vortices |
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| DAI Kan,LUO Zhe-xian,TENG Dai-gao.Influences of a Small-Scale System on the Self-Organization of Vortices[J].Journal of Nanjing Institute of Meteorology,2008,31(2):158-166. |
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| Authors: | DAI Kan LUO Zhe-xian TENG Dai-gao |
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| Institution: | DAI Kan , LUO Zhe-xian, TENG Dai-gao ( 1. Jiangsu Key Laboratory of Meteorological Disaster;2. School of Remote Sensing,NUIST,Nanjing 210044 ,China) |
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| Abstract: | In the framework of vortex self-organization dynamics,the influences of a small-scale system on the self-organization process of two meso-β vortices are investigated by utilizing an f-plane 2D quasi-geostrophic barotropic vorticity equation model. Four groups of numerical experiments are performed, and the results show that： the small-scale system may change the two vortices interaction and trigger the merging process;the final state is sensitive to the initial location of the small-scale system; there is a ＂Z＂ shape sensitive region, when a small-scale vortex initially appears there, resulting in the fact that the interaction stage of the two vortexes is more likely to be changed;for altering the vortices interaction results, the small-scale system should satisfy the following three necessary conditions：an initial position in the ＂Z＂ shape sensitive region, proper distances to other two vortices, enough intensity and longer life cycle. |
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| Keywords: | vortex self-organization multi-scale |
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