| 含经圈环流的基流的斜压不稳定 |
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| 引用本文： | 缪锦海,宋燕.含经圈环流的基流的斜压不稳定[J].气象学报,1993,51(1):12-20. |
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| 作者姓名： | 缪锦海 宋燕 |
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| 作者单位： | 北京气象学院 100081
(缪锦海)，北京气象学院 100081(宋燕) |
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| 摘 要： | 基本气流含有经圈环流的斜压不稳定充要条件为:K~2<2F和(U_sk+V_s1)~2>U_0k~2.因而,对纯经向基流也可以出现斜压不稳定。在西风基流和给定经向波数1>0情况下,正经圈环流使不稳定区域增大,反经圈环流使不稳定区域减小,而在东风基流情况下,特征相反。 含有经圈环流的基流的不稳定增长率随波数变化特征与纯纬向基流的情况有着显著的不同。
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| 关 键 词： | 环流 斜压不稳定 条件 |
| 收稿时间： | 1990/11/20 0:00:00 |
| 修稿时间： | 1991/5/24 0:00:00 |
BAROCLINIC INSTABILIY OF THE BASIC STATE WITH MERIDIONAL CIRCULATION |
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| Miao Jinhai and Song Yan.BAROCLINIC INSTABILIY OF THE BASIC STATE WITH MERIDIONAL CIRCULATION[J].Acta Meteorologica Sinica,1993,51(1):12-20. |
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| Authors: | Miao Jinhai and Song Yan |
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| Institution: | Beijing Institute of Meteorology, Beijing 100081;Beijing Institute of Meteorology, Beijing 100081 |
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| Abstract: | The sufficient and necessary conditions of baroclinic instability of the basic flow including meridional circulation are K2<2F and (Usk+Vsl)2>c2k2.The baroclinic instability can occur in only meridional flows. If the meridional wavenumber 1(1>0) is known in westerlies, the direct meridional circulation expands the unstable area and the indirect meridional circulation reduces it oppositely.But the features are contrary in easterlies.The instability growth rate of the basic flow including meridional circulation varying with wavenumber K is remarkably different from that of only zonal basic flow. |
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| Keywords: | Circulation Baroclinic instabitity Condition |
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