摘要
本文通过一系列敏感性试验探究台风"烟花"移动缓慢的可能机理.结果表明:台风"烟花"的移动对台风"尼伯特"的强度较为敏感."尼伯特"强度主要通过影响其附近大尺度低压系统的强度与范围,间接影响"烟花"的大尺度引导气流,进而影响"烟花"的移动.具体而言,"尼伯特"与其附近大尺度低压系统环流共同激发西北风引导气流,抵消了部分副高西南侧的东南风引导气流,从而造成"烟花"受到的大尺度引导气流偏弱,致使其移动缓慢,路径复杂.此外,当"尼伯特"强度越大时,以上过程对"烟花"移动的影响也越大.因此,当两个台风相距较远时,双台风相互作用可能通过影响周围的大尺度系统,间接对台风路径产生较大影响.
Abstract
This study employed a series of sensitivity experiments to investigate the potential mechanisms of the slow movement of Typhoon"In-fa".The findings show that the movement of Typhoon"In-fa"is influenced by the intensity of Typhoon"Nepartak".The intensity of"Nepartak"mainly affects the strength and range of the nearby large-scale low-pressure system,indirectly affecting the large-scale guiding airflow of"In-fa"and then affects its movement.In particular,the northwest wind-steering flow generated by"Nepartak"and low-pressure system partially neutralizes the southeast wind-steering flow on the southwest side of the subtropical high.This neutralization leads to the reduction in the large-scale steering flow of"In-fa",resulting in its slow movement and a complex track.Moreover,the study points out that the stronger"Nepartak"is,the greater its influences on movement of"In-fa"are.Results emphasize that interaction between distant typhoons can indirectly affect typhoon tracks by influencing the large-scale systems in its vicinity.
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