Timing and magnitude of recent accelerated sea-level rise (North Carolina, United States)

We provide records of relative sea level since A.D. 1500 from two salt marshes in North Carolina to complement existing tide-gauge records and to determine when recent rates of accelerated sea-level rise commenced. Reconstructions were developed using foraminifera-based transfer functions and compos...

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Bibliographic Details
Published in:Geology (Boulder) 2009-11, Vol.37 (11), p.1035-1038
Main Authors: Kemp, Andrew C, Horton, Benjamin P, Culver, Stephen J, Corbett, D. Reide, van de Plassche, Orson, Gehrels, W. Roland, Douglas, Bruce C, Parnell, Andrew C
Format: Article
Language:English
Subjects:
Atlantic Coastal Plain
Carteret County North Carolina
Cenozoic
Dare County North Carolina
elevation
Geological time
geomorphology
Holocene
landform evolution
Marine
marshes
mires
North Carolina
Oceans
Outer Banks
Paleobiology
Pamlico Sound
Quaternary
Quaternary geology
rates
salt marshes
Sand Point
Sea level
sea-level changes
shore features
Tump Point
United States
upper Holocene
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Summary:We provide records of relative sea level since A.D. 1500 from two salt marshes in North Carolina to complement existing tide-gauge records and to determine when recent rates of accelerated sea-level rise commenced. Reconstructions were developed using foraminifera-based transfer functions and composite chronologies, which were validated against regional twentieth century tide-gauge records. The measured rate of relative sea-level rise in North Carolina during the twentieth century was 3.0-3.3 mm/a, consisting of a background rate of approximately 1 mm/a, plus an abrupt increase of 2.2 mm/a, which began between A.D. 1879 and 1915. This acceleration is broadly synchronous with other studies from the Atlantic coast. The magnitude of the acceleration at both sites is larger than at sites farther north along the U.S. and Canadian Atlantic coast and may be indicative of a latitudinal trend.
ISSN:0091-7613
1943-2682
DOI:10.1130/G30352A.1