Extreme coastal erosion enhanced by anomalous extratropical storm wave direction

Abstract Extratropical cyclones (ETCs) are the primary driver of large-scale episodic beach erosion along coastlines in temperate regions. However, key drivers of the magnitude and regional variability in rapid morphological changes caused by ETCs at the coast remain poorly understood. Here we analy...

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Autores principales:	Mitchell D. Harley, Ian L. Turner, Michael A. Kinsela, Jason H. Middleton, Peter J. Mumford, Kristen D. Splinter, Matthew S. Phillips, Joshua A. Simmons, David J. Hanslow, Andrew D. Short
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/80971cccd0c540189ed450371b6c70d4
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spelling	oai:doaj.org-article:80971cccd0c540189ed450371b6c70d42021-12-02T15:04:54ZExtreme coastal erosion enhanced by anomalous extratropical storm wave direction10.1038/s41598-017-05792-12045-2322https://doaj.org/article/80971cccd0c540189ed450371b6c70d42017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05792-1https://doaj.org/toc/2045-2322Abstract Extratropical cyclones (ETCs) are the primary driver of large-scale episodic beach erosion along coastlines in temperate regions. However, key drivers of the magnitude and regional variability in rapid morphological changes caused by ETCs at the coast remain poorly understood. Here we analyze an unprecedented dataset of high-resolution regional-scale morphological response to an ETC that impacted southeast Australia, and evaluate the new observations within the context of an existing long-term coastal monitoring program. This ETC was characterized by moderate intensity (for this regional setting) deepwater wave heights, but an anomalous wave direction approximately 45 degrees more counter-clockwise than average. The magnitude of measured beach volume change was the largest in four decades at the long-term monitoring site and, at the regional scale, commensurate with that observed due to extreme North Atlantic hurricanes. Spatial variability in morphological response across the study region was predominantly controlled by alongshore gradients in storm wave energy flux and local coastline alignment relative to storm wave direction. We attribute the severity of coastal erosion observed due to this ETC primarily to its anomalous wave direction, and call for greater research on the impacts of changing storm wave directionality in addition to projected future changes in wave heights.Mitchell D. HarleyIan L. TurnerMichael A. KinselaJason H. MiddletonPeter J. MumfordKristen D. SplinterMatthew S. PhillipsJoshua A. SimmonsDavid J. HanslowAndrew D. ShortNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mitchell D. Harley Ian L. Turner Michael A. Kinsela Jason H. Middleton Peter J. Mumford Kristen D. Splinter Matthew S. Phillips Joshua A. Simmons David J. Hanslow Andrew D. Short Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
description	Abstract Extratropical cyclones (ETCs) are the primary driver of large-scale episodic beach erosion along coastlines in temperate regions. However, key drivers of the magnitude and regional variability in rapid morphological changes caused by ETCs at the coast remain poorly understood. Here we analyze an unprecedented dataset of high-resolution regional-scale morphological response to an ETC that impacted southeast Australia, and evaluate the new observations within the context of an existing long-term coastal monitoring program. This ETC was characterized by moderate intensity (for this regional setting) deepwater wave heights, but an anomalous wave direction approximately 45 degrees more counter-clockwise than average. The magnitude of measured beach volume change was the largest in four decades at the long-term monitoring site and, at the regional scale, commensurate with that observed due to extreme North Atlantic hurricanes. Spatial variability in morphological response across the study region was predominantly controlled by alongshore gradients in storm wave energy flux and local coastline alignment relative to storm wave direction. We attribute the severity of coastal erosion observed due to this ETC primarily to its anomalous wave direction, and call for greater research on the impacts of changing storm wave directionality in addition to projected future changes in wave heights.
format	article
author	Mitchell D. Harley Ian L. Turner Michael A. Kinsela Jason H. Middleton Peter J. Mumford Kristen D. Splinter Matthew S. Phillips Joshua A. Simmons David J. Hanslow Andrew D. Short
author_facet	Mitchell D. Harley Ian L. Turner Michael A. Kinsela Jason H. Middleton Peter J. Mumford Kristen D. Splinter Matthew S. Phillips Joshua A. Simmons David J. Hanslow Andrew D. Short
author_sort	Mitchell D. Harley
title	Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
title_short	Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
title_full	Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
title_fullStr	Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
title_full_unstemmed	Extreme coastal erosion enhanced by anomalous extratropical storm wave direction
title_sort	extreme coastal erosion enhanced by anomalous extratropical storm wave direction
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/80971cccd0c540189ed450371b6c70d4
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_version_	1718389026890711040

Extreme coastal erosion enhanced by anomalous extratropical storm wave direction

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