排序方式: 共有8条查询结果,搜索用时 15 毫秒
1
1.
By using a two-level quasi-geostrophic truncated spectral model taking account of the nonlinear interaction between different wave components (i. e. basic current, ultra-long waves and long waves), the index cycle of general circulation is investigated. The calculated results show that the circulation index has a, quasi-periodic vacillation with a period of 8 to 16 days, which can be created by the nonlinear interaction and that the nonlinear interaction between different wave components may cause the tilted-trough vacillation, amplitude vacillation of wave pattern and quasi-periodic change of wave number of flow pattern. 相似文献
2.
3.
地形和热源对冬季定常行星波形成的影响 总被引:2,自引:1,他引:2
本文用二层非线性原始方程谱模式,并在方程中考虑了Rayleigh摩擦、Newton冷却和温度水平扩散,在伟向均匀的初始场下,积分40天,分别模拟了地形、热源单独作用和共同作用对冬季定常行星波形成的影响,尤其考虑了不同尺度地形和非定常热源的影响。 相似文献
4.
5.
本文用两层准地转截谱模式,考虑基本气流、超长波和长波之间的非线性相互作用,得出了大气环流指数循环这种准周期振荡过程,其周期为8—15天.数值计算表明:非线性相互作用可以产生大气行星波螺旋状槽线倾斜的谐振、不同尺度波动的振幅谐振以及大型环流波数变化的准周期振荡. 相似文献
6.
7.
8.
1