近似实际风场条件下台风中扰动的稳定性

INSTABILITY OF PERTURBATION IN TYPHOONS UNDER THE CONDITIONS OF APPROXIMATE ACTUAL WIND FIELD

在与实际台风风场近似一致的环境流场条件下，应用柱坐标中的正压无辐散模式，讨论了台风中扰动的稳定性问题．研究表明，台风暖心结构和台风外围适当强度的冷空气活动有利于台风中扰动发展，且台风愈强（气压愈低），台风中扰动愈易发展．

With conditions of approximately actual beckground wind field in typhoons and a barotropic nondivergent model in a cylindlical coodinate, the Problem of instability of the Perturbation in tyPhoons is discussed. The resultS show that the warm core structure of typhoons and the activity of Properly strong cold air in the periphery are advantageous to the Perturbation development in typhoons, and the stronger the typhoons, i. e. the lowet the pressure, the easier the perturbation in typhoons would develop.