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

被引:0
|
作者
Hui Wang
Yubin Yu
Dajun Zhao
Tzu-Hsiung Yen
Hongxiong Xu
Qian Wang
Zhiqiang Cao
机构
[1] China Meteorological Administration,State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences
[2] China Meteorological Administration Training Centre,Shanghai Typhoon Institute
[3] China Meteorological Administration,Department of Atmospheric Sciences
[4] “National” Taiwan University,National Meteorological Centre
[5] China Meteorological Administration,Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center/National Center for Space Weather
[6] China Meteorological Administration,undefined
来源
Journal of Meteorological Research | 2023年 / 37卷
关键词
concentric eyewall; secondary eyewall formation; tropical cyclone; intensity change;
D O I
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中图分类号
学科分类号
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.
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页码:431 / 440
页数:9
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