ANALYSIS OF THE PLANE DYNAMIC SYSTEM OF LOW-LEVEL STREAMLINE FIELD OF TROPICAL CYCLONE
WU You-xun
ZHU Bin
LIN Xiao-jian
HUANG Qian
CHEN Xiao-hong
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.
Keywords：tropical cyclonedynamical systemtyphoon eyelow-level streamline field
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 896-902 )