| 涡旋Rossby波传播的不同特征 |
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| 引用本文： | 周后福,马镜娴.涡旋Rossby波传播的不同特征[J].南京气象学院学报,2002,25(3):342-350. |
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| 作者姓名： | 周后福 马镜娴 |
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| 作者单位： | 南京气象学院气象灾害和环境变化开放研究实验室,江苏南京,210044 |
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| 基金项目： | 国家科技部专项项目 2 0 0 1 DIA2 0 0 2 6，国家自然科学基金项目 4 0 0 75 0 1 2 |
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| 摘 要： | 用一个柱坐标系涡度正压方程的半谱模式，实施了4组试验，研究了不同初始扰动涡旋分布条件下，涡旋Rossby波的传播特征问题。结果指出：正值、负值相间的沿方向角二波分布的初始场，与只有正值涡旋的初始场相比，其后涡旋Rossby波的传播有明显的差别，即前者向内传播的涡量比后者衰减得快，而且前者是单峰传播，后者是双峰传播。
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| 关 键 词： | 涡旋Rossby波 初始扰动分布 径向传播 台风环流 半谱模式 |
| 文章编号： | 1000-2022(2002)03-0342-09 |
| 修稿时间： | 2001年9月6日 |
Different Characteristics of the Propagation of Vortex Rossby Waves |
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| ZHOU Hou-fu,MA Jing-xian.Different Characteristics of the Propagation of Vortex Rossby Waves[J].Journal of Nanjing Institute of Meteorology,2002,25(3):342-350. |
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| Authors: | ZHOU Hou-fu MA Jing-xian |
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| Abstract: | Using a semi-spectral barotropic quasigeostrophic vorticity equation in the cylindrical coordinates,four experiments whose integration time is seven model hours are performed in order to study the propagation characteristics of vortex Rossby waves in different initial distributions of perturbation vorticity. Results show that propagation of vortex Rossy waves in an initial perturbation vorticity field of azimuthal wave-number 2(i.e positive alternating with negative) is obviously different from that in an intial field of only positive perturbation vorticity.The inward propagation vorticity decays more rapidly in the former case than in the latter case.And the inward propagation of vorticity exhibits a single peak form,but it shows a double peak form in the latter case. |
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| Keywords: | vortex Rossby waves initial distribution of perturbations radial propagation |
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