海～气耦合振荡的非绝热慢波

本文从大气能量平衡方程和海温变化方程出发,得到海～气耦合的多频振荡系统,分析此多频系统的特殊频率方程得到: 1)当大气视为非定常,海洋视为定常的情况下,得到的波动本质上是非绝热的Rossby波。 2)当大气定常,海洋非定常的情况下,得到两类性质相异的波动;一类是周期为准半年(4～9月)的非绝热慢波,另一类是周期为准两年(2～3年)的非绝热慢波;两类慢波的传播方向完全相反,准两年波比准半年波传播得更慢(两者几乎相差一个量级)。

DIABATIC SLOW WAVES IN THE OCEAN-ATMOSPHERE COUPLING OSCILLATIONS

Using the atmospheric heat balance equation and the equation of sea surface temperature variation, the multi-frequency oscillations of the ocean-atmosphere coupling are explored in this paper. It is found that; 1) If the oceanic variable is constant with the varying of time and the atmospheric varys with time, the wave is diabatic Rossby wave in nature; 2) If the atmospheric variable is constant with the varying of time and the oceanic variable varys with time, two waves of different characters may be found; one is the quasi-half year (about 4-9 months ) diabatic slow wave,the other is the quasi-two year(2-3 years) diabatic slow wave. Their propagating directions are diverse,and the latter is slower than the former.