The Control of Tropical Cyclone Wind Structure on Inner and Outer Rainband Formation: A Balanced Dynamics Perspective.
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| Title: | The Control of Tropical Cyclone Wind Structure on Inner and Outer Rainband Formation: A Balanced Dynamics Perspective. |
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| Authors: | Yang, Bolei1,2 (AUTHOR) yang.bolei@nju.edu.cn |
| Source: | Journal of the Atmospheric Sciences. May2026, Vol. 83 Issue 5, p1-17. 17p. |
| Subjects: | Tropical cyclones, Windstorms, Steady-state flow, Fluid mechanics |
| Abstract: | Inner and outer rainbands are ubiquitous features of tropical cyclones (TCs) and can induce significant intensity fluctuations. While previous studies have indicated that broad TC wind profiles favor outer rainbands and narrow profiles favor inner rainbands, the underlying dynamical mechanism has remained unclear. This study elucidates this relationship using idealized simulations and the Sawyer-Eliassen equation. We demonstrate that a narrow wind profile's response to eyewall heating is a strong, low-level convergence in the inner core, which sustains inner rainbands. In contrast, a broad wind profile produces an inner-core divergence and outer-core convergence, thereby promoting a subsident moat and outer rainbands. This fundamental difference arises from how the radial gradient of inertial stability resists boundary layer inflow. This work provides a new axisymmetric dynamical perspective on TC rainband organization and secondary eyewall formation, highlighting the inertial stability gradient as a critical control. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194578221 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Control of Tropical Cyclone Wind Structure on Inner and Outer Rainband Formation: A Balanced Dynamics Perspective. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yang%2C+Bolei%22">Yang, Bolei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yang.bolei@nju.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Atmospheric+Sciences%22">Journal of the Atmospheric Sciences</searchLink>. May2026, Vol. 83 Issue 5, p1-17. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Tropical+cyclones%22">Tropical cyclones</searchLink><br /><searchLink fieldCode="DE" term="%22Windstorms%22">Windstorms</searchLink><br /><searchLink fieldCode="DE" term="%22Steady-state+flow%22">Steady-state flow</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+mechanics%22">Fluid mechanics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Inner and outer rainbands are ubiquitous features of tropical cyclones (TCs) and can induce significant intensity fluctuations. While previous studies have indicated that broad TC wind profiles favor outer rainbands and narrow profiles favor inner rainbands, the underlying dynamical mechanism has remained unclear. This study elucidates this relationship using idealized simulations and the Sawyer-Eliassen equation. We demonstrate that a narrow wind profile's response to eyewall heating is a strong, low-level convergence in the inner core, which sustains inner rainbands. In contrast, a broad wind profile produces an inner-core divergence and outer-core convergence, thereby promoting a subsident moat and outer rainbands. This fundamental difference arises from how the radial gradient of inertial stability resists boundary layer inflow. This work provides a new axisymmetric dynamical perspective on TC rainband organization and secondary eyewall formation, highlighting the inertial stability gradient as a critical control. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1175/JAS-D-25-0185.1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 1 Subjects: – SubjectFull: Tropical cyclones Type: general – SubjectFull: Windstorms Type: general – SubjectFull: Steady-state flow Type: general – SubjectFull: Fluid mechanics Type: general Titles: – TitleFull: The Control of Tropical Cyclone Wind Structure on Inner and Outer Rainband Formation: A Balanced Dynamics Perspective. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yang, Bolei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00224928 Numbering: – Type: volume Value: 83 – Type: issue Value: 5 Titles: – TitleFull: Journal of the Atmospheric Sciences Type: main |
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