| 偶极子移动的三种类型 |
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| 引用本文： | 罗哲贤.偶极子移动的三种类型[J].气象学报,1998,56(3):362-368. |
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| 作者姓名： | 罗哲贤 |
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| 作者单位： | 南京气象学院 |
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| 摘 要： | 用β平面准地转正压模式，实施了１８组积分时间为４至６个模式日的试验。从偏离偶极子解析解的流型启动，得到了偶极子移动的３种类型，即东进型、西进型和经向型。在一定的参数集合，在涡旋对总体上向外频散能量的同时，偶极子气旋涡旋的强度不但不随时间衰减，而且可以增强。
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| 关 键 词： | 偶极子，能量频散，非线性作用 |
| 收稿时间： | 1996/10/18 0:00:00 |
| 修稿时间： | 1997/7/21 0:00:00 |
THREE MOVEMENT KINDS OF DIPOLE FLOW PATTERNS |
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| Luo Zhexian.THREE MOVEMENT KINDS OF DIPOLE FLOW PATTERNS[J].Acta Meteorologica Sinica,1998,56(3):362-368. |
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| Authors: | Luo Zhexian |
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| Institution: | Nanjing Institute of Meteorology, Nanjing, 210044 |
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| Abstract: | Using a beta-plane quasigeostrophic barotropic vorticity model, eighteen experiments with the initial fields that are deviated from that correspo nding to the dipole pattern described by the analytical solution of the vorticity equation whose integration times are from 4 to 6 model days are performed. Three movenent kinds of the vortices have been exhibited, that is, west wards, eastwards, and north or southwards. In certain ranges of the parameters in the model, while the total dipole energy is dispersed away, the cyclonic vortex can intensify, which is different with that the vortex int ensity decreases with time because of the energy dispersion. |
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| Keywords: | Dipole Energy dispersion Nonlinear interaction |
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