【摘要】 本文从理论上证明斜压非静力平衡大气中飑线的形成与演变和正压大气中一样可以归结为一类由K-dV方程所描述的大气孤波.讨论了在具有垂直切变的基本气流中这类孤波的结构特征,并与观测事实作了对比.当沿着低空急流出现有限宽度的初始扰动时,这种孤波可以被激发出来.当扰动的强度与宽度达到一定值时,还将形成一种孤波队列.这正是大气中所观测到的飑线或雷雨列队现象.更多还原

【Abstract】 This paper theoritically proves that the formation and the evolution of squall lines in the baroclinic, non-static atmosphere, as in the barotropic atmosphere, may be referred to a kind of atmospheric solitary wave described by the K-dV equation. The baroclinity and the non-static state of the atmosphere as well as the vertical shear of basic flow have influences on the characteristics and the structure of the solitary wave. When an initial disturbance with limited width occurs along the lower jet, this kind of solitary wave may be excited. If the strength and the width of the disturbance reach definite values, a train of solitary waves lined up forms. This is just the arrangement phenomenon of squall lines or thunderstorm complex observed in the atmosphere.更多还原