锋生过程对扰动发展的影响  

The Effects of Frontogenetical Process on the Development of Disturbance

作　　者：王兴宝[1] 

机构地区：[1]空军气象学院

出　　处：《大气科学》1997年第4期472-484,共13页Chinese Journal of Atmospheric Sciences

基　　金：大气科学和地球流体力学数值模拟国家重点实验室(LASG)与空军司令部气象局共同资助

摘　　要：本文用ＷＫＢＪ方法讨论了叠加在Ｈｏｓｋｉｎｓ－Ｂｒｅｔｈｅｒｔｏｎ［１］锋生模型背景上的小扰动发展问题。考虑了大尺度变形场、锋区斜压气流及锋生环流对扰动发展的作用，发现锋生过程有利于与锋平行的中小尺度扰动发展。The development of infinilesimal disturbances in the form of wave packet superposed on the frontogenetically forced basic state of Hoskins-Bretherton frontogenesis model is investigated by means of the WKBJ method. The effects of large scale deformation field, the baroclinic flow of frontal zone and non-geostrophic circulation of frontogenesis on the development of disturbances are discussed, respectively. It is found that the frontogenesis is in favour of the development of the disturbance propagating parallelly to the front, while frontolysis is in favour of the development of the disturbance propagating along the front.

关 键 词：锋生锋消 扰动发展 WKBJ方法 

分 类 号：P441[天文地球—大气科学及气象学]