Analysis of a Southerly Buster Event and Associated Solitary Waves

Wang, S; Leslie, L; Rai, T; Speer, M; Kuleshov, Y

Analysis of a Southerly Buster Event and Associated Solitary Waves

Wang, S Leslie, L

Rai, T

Speer, M Kuleshov, Y

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Publisher:: Australian Bureau of Meteorology
Publication Type:: Journal Article
Citation:: Journal of Southern Hemisphere Earth Systems Science, 2020
Issue Date:: 2020

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Field	Value	Language
dc.contributor.author	Wang, S	en_US
dc.contributor.author	Leslie, L https://orcid.org/0000-0001-5616-2330	en_US
dc.contributor.author	Rai, T https://orcid.org/0000-0003-1610-8983	en_US
dc.contributor.author	Speer, M	en_US
dc.contributor.author	Kuleshov, Y	en_US
dc.date.available	2019-10-07	en_US
dc.date.issued	2020	en_US
dc.identifier.citation	Journal of Southern Hemisphere Earth Systems Science, 2020	en_US
dc.identifier.issn	2206-5865	en_US
dc.identifier.uri	http://hdl.handle.net/10453/138144
dc.description.abstract	This paper is a detailed case study of the southerly buster of October 6-7, 2015, along the New South Wales coast. It takes advantage of recently available Himawari-8 high temporal- and spatial-resolution satellite data, and other observational data. The data analyses support the widespread view that the southerly buster is a density current, coastally trapped by the Great Dividing Range. In addition, it appears that solitary waves develop in this event because the prefrontal boundary layer is shallow and stable. A simplified density current model produced speeds matching well with observational southerly buster data, at both Nowra and Sydney airports. Extending the density current theory, to include inertia-gravity effects, suggests that the solitary waves travel at speeds approximately 20% faster than the density current. This speed difference is consistent with the high-resolution satellite data, which shows the solitary waves moving increasingly ahead of the leading edge of the density current.	en_US
dc.publisher	Australian Bureau of Meteorology	en_US
dc.relation.ispartof	Journal of Southern Hemisphere Earth Systems Science	en_US
dc.relation.isbasedon	10.22499/3.6901.015	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Analysis of a Southerly Buster Event and Associated Solitary Waves	en_US
dc.type	Journal Article
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
pubs.organisational-group	/University of Technology Sydney/DVC (Research)/Graduate Research School
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	open_access	*
pubs.consider-herdc	true	en_US
pubs.publication-status	Published online	en_US

Abstract:

This paper is a detailed case study of the southerly buster of October 6-7, 2015, along the New South Wales coast. It takes advantage of recently available Himawari-8 high temporal- and spatial-resolution satellite data, and other observational data. The data analyses support the widespread view that the southerly buster is a density current, coastally trapped by the Great Dividing Range. In addition, it appears that solitary waves develop in this event because the prefrontal boundary layer is shallow and stable. A simplified density current model produced speeds matching well with observational southerly buster data, at both Nowra and Sydney airports. Extending the density current theory, to include inertia-gravity effects, suggests that the solitary waves travel at speeds approximately 20% faster than the density current. This speed difference is consistent with the high-resolution satellite data, which shows the solitary waves moving increasingly ahead of the leading edge of the density current.

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http://hdl.handle.net/10453/138144