Spiral rainbands in a numerical simulation of Hurricane Bill (2009). Part II

Propagation of inner rainbands

Yumin Moon, David S Nolan

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

This is the second part of a study that examines spiral rainbands in a numerical simulation of Hurricane Bill (2009). This paper evaluates whether the propagation of inner rainbands in the Hurricane Bill simulation is consistent with previously proposed hypotheses. Results indicate that the propagation of inner rainbands is not consistent with gravity waves, vortex Rossby waves, or squall lines. An alternative hypothesis is offered, arguing that inner rainbands are simply convective clouds that are advected by the rapidly rotating tropical cyclone wind field while being deformed into spiral shapes. A summary and a discussion of the results of both Parts I and II are provided.

Original languageEnglish (US)
Pages (from-to)191-215
Number of pages25
JournalJournal of the Atmospheric Sciences
Volume72
Issue number1
DOIs
StatePublished - 2015

Fingerprint

rainband
hurricane
simulation
squall line
convective cloud
Rossby wave
tropical cyclone
wind field
gravity wave
vortex

Keywords

  • Hurricanes
  • Hurricanes/typhoons
  • Tropical cyclones

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

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abstract = "This is the second part of a study that examines spiral rainbands in a numerical simulation of Hurricane Bill (2009). This paper evaluates whether the propagation of inner rainbands in the Hurricane Bill simulation is consistent with previously proposed hypotheses. Results indicate that the propagation of inner rainbands is not consistent with gravity waves, vortex Rossby waves, or squall lines. An alternative hypothesis is offered, arguing that inner rainbands are simply convective clouds that are advected by the rapidly rotating tropical cyclone wind field while being deformed into spiral shapes. A summary and a discussion of the results of both Parts I and II are provided.",
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AB - This is the second part of a study that examines spiral rainbands in a numerical simulation of Hurricane Bill (2009). This paper evaluates whether the propagation of inner rainbands in the Hurricane Bill simulation is consistent with previously proposed hypotheses. Results indicate that the propagation of inner rainbands is not consistent with gravity waves, vortex Rossby waves, or squall lines. An alternative hypothesis is offered, arguing that inner rainbands are simply convective clouds that are advected by the rapidly rotating tropical cyclone wind field while being deformed into spiral shapes. A summary and a discussion of the results of both Parts I and II are provided.

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KW - Tropical cyclones

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