Unusual Evolution of the Multiple Eyewall Cycles in Super Typhoon Hinnamnor(2022)  

作　　者：Hui WANG Yubin YU Dajun ZHAO Tzu-Hsiung YEN Hongxiong XU Qian WANG Zhiqiang CAO 

机构地区：[1]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081 [2]China Meteorological Administration Training Centre,Beijing 100081 [3]Shanghai Typhoon Institute,China Meteorological Administration,Shanghai 200030 [4]Department of Atmospheric Sciences,“National”Taiwan University,Taipei 10617 [5]National Meteorological Centre,China Meteorological Administration,Beijing 100081 [6]Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites,National Satellite Meteorological Center/National Center for Space Weather,China Meteorological Administration,Beijing 100081

出　　处：《Journal of Meteorological Research》2023年第4期431-440,共10页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(42175008,42192554,and 41730960);Shanghai Typhoon Research Foundation(TFJJ202201);Basic Research Fund of Chinese Academy of Meteorological Sciences(CAMS)(2020Y015);Open Fund of the State Key Laboratory of Severe Weather of CAMS(2021LASW-A14)。

摘　　要：Hinnamnor was the first super typhoon in the western North Pacific basin in 2022.It had several prominent characteristics,such as rapid intensification after its formation,three eyewall cycles,and a sudden recurvature of its track.Based on multi-source observational and reanalysis datasets,two secondary eyewall formation(SEF)cycles occurred during Super Typhoon Hinnamnor’s lifetime.The first SEF happened near the time when Hinnamnor achieved its maximum intensity,and it seems that its internal dynamics dominated the SEF process after the development of shear-induced asymmetric spiral rainbands.The merger of a tropical depression with Hinnamnor led to a continuous increase in both its inner-core size and outer-core circulation,causing generation of the second SEF.It is inferred that the external and internal dynamics worked together during the second SEF process.The concentric eyewall structure maintained for approximately 84 h under the moderate vertical wind shear.Also,unique changes in intensity accompanied the two structural changes.

关 键 词：concentric eyewall secondary eyewall formation tropical cyclone intensity change 

分 类 号：P444[天文地球—大气科学及气象学]