热带气象学报2017，Vol.33Issue(6)：896-902,7.DOI:10.16032/j.issn.1004-4965.2017.06.010
热带气旋低层水平流场的平面动力系统分析
ANALYSIS OF THE PLANE DYNAMIC SYSTEM OF LOW-LEVEL STREAMLINE FIELD OF TROPICAL CYCLONE
摘要
Abstract
Based on the CMA-STI tropical cyclone best track data,cloud atlas data,weather radar echo data and the reanalysis of wind field data by ECMWF ERA-Interim,and with the atmospheric motion equations and synoptic principle,we analyzed the structure of the low-level horizontal flow field of tropical cyclone (TC),and established a plane nonlinear autonomous dynamic system according to the flow field.The results show that the horizontal flow is determined by two groups of two-dimensional stationary differential equations when the TC is in the mature stage of development or a strong period;the air flows clockwise within the eye area but counterclockwise outside it.Between the wind fields of opposite direction that are inside and outside the eye zone there is a wind shear ring on which cyclones are formed consecutively,and there is a low-level jet where rough weather appears.The results are consistent with the observation by synthetic radar echoes.关键词
热带气旋/动力系统/台风眼/低层流场Key words
tropical cyclone/dynamical system/typhoon eye/low-level streamline field分类
天文与地球科学引用本文复制引用
吴有训,朱彬,林晓剑,黄乾,陈晓红..热带气旋低层水平流场的平面动力系统分析[J].热带气象学报,2017,33(6):896-902,7.基金项目
国家自然科学基金项目(41271545)资助 （41271545）
