基本流和切变流影响下的南亚季风

SOUTH ASIA MONSOON AFFECTED BY BASIC AND SHEAR FLOW

关键词:  南亚季风  低阶谱方法  切变流

Key words:  Monsoon in South Asia  Low order spectral method  Shear flow

摘要:

采用赤道平衡模式及低阶谱方法,考虑基本气流、一次切变流和二次切变流的影响,给出了描写南亚冬夏季风的非线性方程。重点讨论了基本气流和一、二次切变流对南亚季风形成、转换和强度的影响,井指出一次切变流对南亚季风影响与基本流及二次切变流对南亚季风的影响明显不同。

Abstract:

By using an equatorial balanced model and low order spectral method and considering the effect of the basic flow, the first-order and second-order shear, the nonlinear equation describing the winter and summer monsoon in South Asia is derived. We mainly discuss the influence of the basic flow, first-and second-order shear on the formation, transformation and intensity of monsoon in South Asia. The results show that there is an evident difference between the influence of first-order shear on monsoon in South Asia and that of the basic flow and second-order shear on monsoon in South Asia.