Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Transactions of Atmospheric Sciences》 2018-05
Add to Favorite Get Latest Update

Structure characteristics and cause analysis of catastrophic wind caused by super typhoon Meranti

CHEN Dehua;ZHANG Ling;ZHANG Wei;ZHAO Yuchun;JIANG Yongcheng;ZHENG Hui;Laboratory of Straits Meteorology,Xiamen Meteorological Bureau;  
Based on the observed data and simulated results,this paper studies the structure characteristics and cause of catastrophic wind caused by super typhoon Meranti(typhoon"1614").It is the strongest typhoon affecting Xiamen since typhoon"5903",and its impact radius is relatively small.Before landing,the local strong wind in typhoon circulation is characterized by periodic fluctuation.The azimuth change of the local strong wind relative to the typhoon first turns clockwise,then turns counterclockwise with the typhoon approaching.Simulated strength of typhoon Meranti based on the wind-pressure relation is in good agreement with the observed result.After landing,typhoon Meranti is affected by terrain friction,which makes the wind speed on the left side of typhoon stronger than that on the right side.Numerical simulation analysis shows that the horizontal advection of wind vector and the pressure gradient term are the main physical factors causing the local catastrophic wind.The strong wind area of typhoon Meranti shows obvious meso-scale characteristics.Wind around the eye wall is strengthened by the vertical air transportation with higher momentum and the momentum downward propagation effect.
【Fund】: 国家自然科学基金资助项目(41705045);; 福建省自然科学基金资助项目(2016J01182);; 厦门市科学技术局科技惠民项目(3502Z20164083);; 中国气象局预报员专项(CMAYBY2017-036);; 福建省气象局开放基金项目(2016K02);; 福建省强降水机理研究创新团队;; 厦门市气象局海洋精细化预报创新团队
【CateGory Index】: P444
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved