GSTDTAP  > 气候变化
DOI10.1029/2018GL080739
Examining Storm Asymmetries in Hurricane Irma (2017) Using Polarimetric Radar Observations
Didlake, Anthony C., Jr.; Kumjian, Matthew R.
2018-12-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:24页码:13513-13522
文章类型Article
语种英语
国家USA
英文摘要

Dual-polarization radar observations of Hurricane Irma (2017) provide new insight into the microphysical structure of a mature tropical cyclone that can be tied to the cyclone dynamics. The primary eyewall exhibited a radar signature of hydrometeor size sorting, which implied that large drops fell out near persistent upward motion in the front-right quadrant of the storm, while smaller drops were advected downstream. In the outer rainbands, convective initiation was also preferred in the front-right quadrant, whereas stratiform precipitation was predominant downwind. For both the primary eyewall and outer rainbands, the preferred quadrant for convective initiation was consistent with the expected kinematic asymmetry of a tropical cyclone in weak environmental wind shear but with moderate translation speed. The developing secondary eyewall exhibited a different asymmetry that indicated a stratiform-to-convective transition associated with heavy precipitation in the rear quadrants. This transition is consistent with hypothesized dynamical theories for secondary eyewall formation.


Plain Language Summary Understanding the sizes, shapes, and types of precipitating particles in tropical cyclones is important for understanding how tropical cyclones change intensity and structure. This study uses radar observations of Hurricane Irma (2017) to explore these precipitating particles as the storm tracked north of Puerto Rico. We found that the precipitation particles of the primary eyewall, secondary eyewall, and outer rainbands were all distributed asymmetrically around the storm. Their specific distributions were tied to the evolving wind field, and provided new insight to the interconnected physical processes that govern the precipitation features of a tropical cyclone. The results from this study can be used for validating weather models used for tropical cyclone prediction.


英文关键词tropical cyclone precipitation radar convection microphysics
领域气候变化
收录类别SCI-E
WOS记录号WOS:000456404600037
WOS关键词SECONDARY EYEWALL FORMATION ; TROPICAL CYCLONE CORE ; BOUNDARY-LAYER JETS ; PART I ; MICROPHYSICAL PROCESSES ; KINEMATIC STRUCTURE ; WINTER STORMS ; ICE ; DYNAMICS ; SIGNATURES
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/26414
专题气候变化
作者单位Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA
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Didlake, Anthony C., Jr.,Kumjian, Matthew R.. Examining Storm Asymmetries in Hurricane Irma (2017) Using Polarimetric Radar Observations[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(24):13513-13522.
APA Didlake, Anthony C., Jr.,&Kumjian, Matthew R..(2018).Examining Storm Asymmetries in Hurricane Irma (2017) Using Polarimetric Radar Observations.GEOPHYSICAL RESEARCH LETTERS,45(24),13513-13522.
MLA Didlake, Anthony C., Jr.,et al."Examining Storm Asymmetries in Hurricane Irma (2017) Using Polarimetric Radar Observations".GEOPHYSICAL RESEARCH LETTERS 45.24(2018):13513-13522.
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