Publication:
Tropical cyclogenesis: a numerical diagnosis based on helical flow organization

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Authors
Levina, G. V.
Montgomery, M. T.
Subjects
Advisors
Date of Issue
2014
Date
Publisher
IOP Publishing
Language
Abstract
A numerical diagnosis for tropical cyclogenesis is proposed based on near-cloud-resolving atmosphere simulation. Calculation and analyses of helical and energetic characteristics together with hydro- and thermodynamic flow fields aloe the diagnosis of tropical cyclogenesis as an event when the primary and secondary circulations become linked on systems scales thereby making the nascent large-scale vortex helical. A key process of vertical vorticity generation from horizontal components and its amplification by special convective coherent structures - Vortex Hot Towers (VHTs) - is highlighted. The process is found to be a pathway for generation of a velocity field with linked vortex lines of horizontal and vertical vorticity on local and systems scales. the role of VHTs as connectors of the primary and secondary circulation is emphasized.
Type
Article
Description
The article of record as published may be found at http://doi:10.1088/1742-6596/544/1/012013
Series/Report No
Department
Department of Meteorology
Other Units
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
The work is supported by the Russian Academy of Sciences, Program of OEMMPU 12-T-1-1008, and the U.S. National Science Foundation, Grant ATM-07333808
Funder
The work is supported by the Russian Academy of Sciences, Program of OEMMPU 12-T-1-1008, and the U.S. National Science Foundation, Grant ATM-07333808
Format
10 p.
Citation
Journal of Physcis Conference Series 544, (2014) 012013 doi:10.1088/1742-6595/544/1/012013
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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