Symmetric and antisymmetric motions of stratospheric lower level in equatorial area
热带平流层低层的对称运动和反对称运动

Equations of symmetric motion and antisymmetric one are obtained. Through solving equations analytically, it is proved theoretically that there are two special motions-symmetric motion and antisymmetric one.The effects of diabatic heating on the symmetric motion and the antisymmetric motion are also discussed. The symmetric diabatic-heating is responsible for the Kelvin wave, and the antisymmetric diabatic-heating for the mixed Rossby-gravity wave. The amplitudes of symmetric and antisymmetric motions increase with the increasing of diabatic-heating intensity .