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|a Significant contribution of the 18.6 year tidal cycle to regional coastal changes |h [electronic resource]. |
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|a [S.l.] : |b Nature Publishing Group, |c 2008. |
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|a Nature Geoscience Volume 1. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Although rising global sea levels will affect the shape of
coastlines over the coming decades1,2, the most severe and
catastrophic shoreline changes occur as a consequence of local
and regional-scale processes. Changes in sediment supply3 and
deltaic subsidence4,5, both natural or anthropogenic, and the
occurrences of tropical cyclones4,5 and tsunamis6 have been
shown to be the leading controls on coastal erosion. Here, we
use satellite images of South American mangrove-colonizedmud
banks collected over the past twenty years to reconstruct changes
in the extent of the shoreline between the Amazon and Orinoco
rivers. The observed timing of the redistribution of sediment and
migration of the mud banks along the 1,500km muddy coast
suggests the dominant control of ocean forcing by the 18.6 year
nodal tidal cycle7. Other factors affecting sea level such as global
warming or El Ni˜no and La Ni˜na events show only secondary
influences on the recorded changes. In the coming decade, the
18.6 year cycle will result in an increase of mean high water levels
of 6 cm along the coast of FrenchGuiana,whichwill lead to a 90m
shoreline retreat |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|t Significant contribution of the 18.6 year tidal cycle to regional coastal changes |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061955/00001 |y Click here for full text |
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|3 Host material |u http://www.nature.com/ngeo/journal/v1/n3/full/ngeo127.html |y Significant contribution of the 18.6 year tidal cycle to regional coastal changes |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/19/55/00001/FI15061955thm.jpg |
