波与基流相互作用下的对称不稳定中尺度环流的发展

寇正; 陆汉城; 宋晓亮; 刘凯

波与基流相互作用下的对称不稳定中尺度环流的发展

解放军理工大学气象学院, 江苏, 南京, 211101

基金项目: 国家自然科学基金项目(40175012)资助

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出版历程
- 收稿日期: 2002-12-23
- 修回日期: 2003-03-02

EVOLUTION OF SYMMETRICALLY UNSTABLE MESOSCALE CIRCULATION UNDER THE INTERACTIONS BETWEEN WAVES AND BASIC FLOWS

Meteorological College, PLA Science and Engineering University, Nanjing 211101, China

摘要

摘要: 通过建立包含扰动和基流方程组的数值模式,全面讨论了扰动与对称不稳定纬向基流的相互作用。研究表明:扰动与基流的相互作用表现为以下两个方面:(1) 扰动改变了基流,而改变了的基流又对扰动有反馈作用;(2) 扰动的平均输送同时也改变扰动自身的结构,从而影响扰动的发展。由对称不稳定基流激发的扰动倾斜环流使基流环境场发生的改变不利于对称不稳定的进一步发展;而由扰动的平均输送所产生的影响则有利于对称不稳定的进一步发展,并且后者的作用强于前者。
- 对称不稳定 /
- 基流 /
- 扰动 /
- 相互作用
Abstract: In a numerical model especially set up in the work that includes disturbance and basic flows, the interactions between disturbances and symmetric instability are discussed comprehensively. The study shows that the interactions display the following features that (1) the basic flow, changed by the disturbance, has feedback on the latter, and (2) the mean transfer of disturbance changes the very structure of the disturbance to affect its evolution. Slantwise circulation of disturbance as excited by symmetrically unstable basic flows has changed the ambient field so that the symmetrical instability keeps evolving. On the other hand, the influence as produced by mean transfer of disturbance is favorable for deeper evolution of the symmetrical instability, with the latter being more important than the former.
- symmetrical instability /
- basic flows /
- disturbance /
- interactions

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参考文献(12)

[1]	BENNETTS D A, HOSKINS B J. Conditional symmetric instability-a possible explanation for frontal rainbands[J].Quart J Roy Met Soc, 1979, 105: 945-962.
[2]	XU Q. Conditional symmetric instability and mesoscale rainbands[J].Quart J Roy Met Soc, 1986, 112: 315-334.
[3]	张可苏. 斜压气流中的中尺度稳定性I:对称不稳定[J].气象学报,1988, 46: 258-266.
[4]	陆汉城, 杨国祥. 中尺度天气原理和预报[M].北京: 气象出版社,2000. 31-38.
[5]	高守亭,朱文姝,董敏. 大气低频变异中的波流相互作用[J].气象学报,1998,56: 665-679.
[6]	WU Guoxiong, CHEN Bia. Non-acceleration theorem in a primitive equation system. Part I: Acceleration of zonal meanflow[J].Adv Atmos Sci, 1989,6: 1-14.
[7]	曾庆存,卢佩生. 非均匀基流上扰动的演变[J].中国科学,1980,3: 1193-1202.
[8]	沈新勇,丁一汇. 对称扰动与纬向基流的相互作用II:粘性波包的发展与弥散[J].大气科学,1998,22: 839-848.
[9]	丁一汇,沈新勇. 对称扰动与纬向基流的相互作用I:倾斜E-P通量理论[J].大气科学,1998,22: 735-743.
[10]	曾庆存. 数值天气预报的数学物理基础,第一卷[M].北京: 科学出版社, 1979. 471-475.
[11]	宋晓亮,陆汉城. 二维非静力深厚湿倾斜对流数值模式设计与条件性对称不稳定数值试验[J].大气科学,2001,25: 503-514.
[12]	LIPPS F. On the anelastic approximation[J].J Atmos Sci, 1990, 47: 1794-1798.