Mesoscale Analysis on the Asymmetric Rainband of Typhoon Matmo(2014)and the Related Weather Situations for the GE222 Aircraft Crash Case
The study focuses on the mesoscale analysis of convective cells embedded within the rainbands accompanied by Typhoon Matmo(2014)which was in moderate intensity(38 m/s in maximum wind speed and 960 hPa in minimum pressure)and penetrated the Taiwan area in the north-northwestward propagation.After it passed the Central Mountain Range,the organized convective cells inside the outer rainbands became several line echo wave patterns(LEWP)in the northeast-southwest orientation.The wave-like echoes gradually moved northeastward,and featured a key factor on the development of rainbands in use of mesonet surface data analysis and dual-Doppler radar analysis.Also,it is feasible to investigate the possible situations for the TNA flight GE222 aircraft crash case from the perspective of abrupt mesoscale weather variations.Based upon the preliminary findings,we learned that the wave-like echoes were quite similar to the bow echo pattern while the typhoon system kept moving northwestward.The mesonet surface data analysis told that each echo in the LEWP consisted of several convective cells bringing heavy rainfall and the resulting temperature drops on the ground along the west coast of Taiwan.The radar analysis delineated that the inflow,the vertical convection and the secondary circulation at the rear flank of LEWP became more obvious and well organized.The wave-like echoes in maximum intensity were accompanied with intense horizontal and vertical wind shears which will threat the aviation safety greatly.
LEWP rainband mesonet surface data analysis dual-Doppler radar analysis
Tai-Hwa HOR Chih-Hsien WEI Tian-Yow Shyu
Lunghwa University of Science and Technology Taiwan Airlines
国内会议
厦门
英文
36-42
2019-06-01（万方平台首次上网日期，不代表论文的发表时间）