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Coastal cliff ground motions and response to extreme storm waves

Earlie, Claire S. ORCID:, Young, Adam P., Masselink, Gerd and Russell, Paul E. 2015. Coastal cliff ground motions and response to extreme storm waves. Geophysical Research Letters 42 (3) , pp. 847-854. 10.1002/2014GL062534

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Coastal cliff erosion from storm waves is observed worldwide, but the processes are notoriously difficult to measure during extreme storm wave conditions when most erosion normally occurs, limiting our understanding of cliff processes. Over January–February 2014, during the largest Atlantic storms in at least 60 years with deepwater significant wave heights of 6–8 m, cliff-top ground motions showed vertical ground displacements in excess of 50–100 µm; an order of magnitude larger than observations made previously. Repeat terrestrial laser scanner surveys over a 2 week period encompassing the extreme storms gave a cliff face volume loss of 2 orders of magnitude larger than the long-term erosion rate. The results imply that erosion of coastal cliffs exposed to extreme storm waves is highly episodic and that long-term rates of cliff erosion will depend on the frequency and severity of extreme storm wave impacts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Environmental Sciences
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Publisher: American Geophysical Union (AGU)
ISSN: 0094-8276
Date of First Compliant Deposit: 16 January 2017
Date of Acceptance: 14 January 2015
Last Modified: 06 Jan 2024 03:16

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