巢纪平,王彰贵. 1993. 简单的热带海气耦合波——Rossby波的相互作用[J]. 气象学报, 51(4):365-393, doi:10.11676/qxxb1993.049 |
简单的热带海气耦合波——Rossby波的相互作用 |
SIMPLE AIR-SEA COUPLED WAVES IN THE TROPICS——The Interaction Between Rossby Waves |
投稿时间:1991-07-05 修订日期:1991-10-31 |
DOI:10.11676/qxxb1993.049 |
中文关键词: 海气耦合波 Rossby波 不稳定耦合波 |
英文关键词:Air-sea coupled waves Rossby waves Unstable coupled waves |
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中文摘要: |
在本文中分析了当大气和海洋中未经耦合前的自由波均为Rossby模时,经相互作用后所激发出的耦合波的物理性质。结果表明,由于大气和海洋的背景状态不同,可以激发出两类不稳定耦合Rossby波。一类波要求大气的背景场是斜压的,而海洋的混合层较深,即热容量较大。这是一类弱相互作用的不稳定波。另一类要求大气的背景场趋于正压性,而海洋的混合层较浅,即热容量较小。这是一类强相互作用的不稳定波。色散关系的计算表明,这两类不稳定波产生的物理机制也不相同。文中对解不同截断模的本征值问题提出了几种数学方法,同时还进一步提出了一种使大气和海洋自由Rossby模的色散关系不受歪曲的处理方法。 |
英文摘要: |
Analysis is focused on the physical properties of coupled waves which result from interaction of the free Rossby waves for atmosphere and ocean respectively.It is shown that in the shallow water models exist two kinds of unstable coupled waves,which depend on the atmospheric and oceanic background state.One is the weak interaction coupled wave with the background state of baroclinic atmosphere and deep mixed layer.Other is the strong one with that of barotropic atmosphere and shallow mixed layer.The dispersion relation also shows that unstable coupled waves are responsive for various physical processes.Three mathematical methods are offered to test the truncation errors from truncated models.At the same time,a reasonable method is taken so as to make the free Rossby waves of atmosphere and ocean be correct. |
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