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dc.contributor.authorMagar, Ven
dc.contributor.authorLefranc, Men
dc.contributor.authorHoyle, RBen
dc.contributor.authorReeve, DEen
dc.date.accessioned2013-06-01T12:55:58Z
dc.date.available2013-06-01T12:55:58Z
dc.date.issued2012-06-26en
dc.identifier.other1107.0486v1en
dc.identifier.urihttp://hdl.handle.net/10026.1/1482
dc.description.abstract

Local bathymetric quasi-periodic patterns of oscillation are identified from monthly profile surveys taken at two shore-perpendicular transects at the USACE field research facility in Duck, North Carolina, USA, spanning 24.5 years and covering the swash and surf zones. The chosen transects are the two furthest (north and south) from the pier located at the study site. Research at Duck has traditionally focused on one or more of these transects as the effects of the pier are least at these locations. The patterns are identified using singular spectrum analysis (SSA). Possible correlations with potential forcing mechanisms are discussed by 1) doing an SSA with same parameter settings to independently identify the quasi-periodic cycles embedded within three potentially linked sequences: monthly wave heights (MWH), monthly mean water levels (MWL) and the large scale atmospheric index known as the North Atlantic Oscillation (NAO) and 2) comparing the patterns within MWH, MWL and NAO to the local bathymetric patterns. The results agree well with previous patterns identified using wavelets and confirm the highly nonstationary behaviour of beach levels at Duck; the discussion of potential correlations with hydrodynamic and atmospheric phenomena is a new contribution. The study is then extended to all measured bathymetric profiles, covering an area of 1100m (alongshore) by 440m (cross-shore), to 1) analyse linear correlations between the bathymetry and the potential forcings using multivariate empirical orthogonal functions (MEOF) and linear correlation analysis and 2) identify which collective quasi-periodic bathymetric patterns are correlated with those within MWH, MWL or NAO, based on a (nonlinear) multichannel singular spectrum analysis (MSSA). (...continued in submitted paper)

en
dc.format.extent? - ? (50)en
dc.languageEnglishen
dc.language.isoEnglishen
dc.subjectcoastal morphologyen
dc.subjectbeach dynamicsen
dc.subjectMSSAen
dc.subjectSSAen
dc.subjectspectral analysisen
dc.titleSpectral quantification of nonlinear behaviour of the nearshore seabed and correlations with potential forcings at Duck, N.C., U.S.A.en
dc.typeJournal Article
plymouth.author-urlhttp://www.plymouth.ac.uk/staff/vmagaren
plymouth.publisher-urlhttp://www.arxiv.org/en
plymouth.publication-statusPublisheden
plymouth.journalArXiven
plymouth.organisational-group/Plymouth
dc.identifier.eissn1932-6203en
dc.rights.embargoperiodNot knownen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.typeJournal Article/Reviewen


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