罗哲贤. 2003. 守恒系统中台风强度变化及其可能因子的数值研究[J]. 气象学报, 61(3):302-311, doi:10.11676/qxxb2003.029
守恒系统中台风强度变化及其可能因子的数值研究
A NUMERICAL STUDY ON THE CHANGE OF TYPHOON INTENSITY AND ITS POSSIBLE FACTORS WITHOUT FORCING AND DISSIPATION
投稿时间:2002-12-05  修订日期:2003-05-03
DOI:10.11676/qxxb2003.029
中文关键词:  台风  涡旋  强度变化  非线性
英文关键词:Typhoon  Mesoscale vortices  Intensity change  Nonlinear relation
基金项目:国家自然科学基金项目(40075012);国家科学技术部专项项目(2001DIA20026)
作者单位
罗哲贤 南京气象学院, 南京, 210044 
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中文摘要:
      用一个高分辨率的f平面正压涡度方程模式,实施了时间积分为36h的21组试验,研究相邻中尺度涡旋与台风涡旋的相互作用。结果指出:这种相互作用能否导致台风加强,取决于两类因子:一是台风涡旋最大风速的取值以及圆形基流切变的强弱;二是切变基流中的中尺度涡旋的自身条件,包括中尺度涡旋的分布、尺度、强度和结构。台风强度与初始中尺度涡旋的尺度、强度之间存在着非线性的联系。
英文摘要:
      By using an f-plane barotropic quasigeostrophic model with the grid space being 5 km, twenty one experiments whose integration times are 36 h are performed in order to investigate the interactions between a typhoon vortex with the radius of maximum tangential wind equal to 100 km and adjacent mesoscale vortices which are located in the outer region initally. The distance between two centers of typhoon and mesoscale vortex is 200 km. Results show that whether the interaction can result in the typhoon intensification depends on two kinds of factors, one of them is the condition of the typhoon circulation, which contains the velocity maximum and the shearing of circular basic current, the other is the self condition of the mesoscale vortices, which contains the distribution, horizontal scale, intensity, and structure of the vortices.
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