摘要 : Two necessary conditions for barotropic instability were obtained by L. Rayleight and R. Fjortoft. Then, P. S. Lu and Q. C. Zeng, and J. K. Chen got the sufficient and necessary conditions for barotropic instability with first deg... 展开 Two necessary conditions for barotropic instability were obtained by L. Rayleight and R. Fjortoft. Then, P. S. Lu and Q. C. Zeng, and J. K. Chen got the sufficient and necessary conditions for barotropic instability with first degree of approximation by the perturbation methods. But, they did not point out how to find 收起