临界稳定性 meaning in English

critical stability
critical stable state
marginal stability

Starting from a two - layer nonlinear quasi - geostrophic baroclinic vorticity equation containing ekman friction , a new generalized energy is proposed to act as lyapunov function and thus a new criterion of nonlinear baroclinic subcritical instability containing two inequalities is obtained
从含ekman摩擦的二层非线性准地转斜压涡度方程出发，提出了一种新的广义能量作为lyapunov函数，导出了非线性斜压亚临界稳定性判据。该判据含有两个不等式： ( 1 )
First using analytical method , we obtained the nonlinear baroclinic subcritical instability criterion and symmetric subcritical instability criterion . second using numerical experiments , we analyzed the influenced fact on the baroclinic subcritical instability , and we also analyzed what the nonlinear subcritical symmetric instability effects on a rainstorm , and advanced a new mechanism produced the rainstorm
本文利用解析方法导得了大气中非线性斜压亚临界稳定性判据和对称亚临界稳定性判据；并分别用数值试验方法分析了斜压亚临界不稳定的影响因素以及亚临界对称不稳定在一场暴雨过程中所起的作用，提出了产生暴雨的新的物理机制。