Type

Journal Article

Authors

Benjamin P. Horton
Ryan P. Mulligan
Anna L. Woodson
Stanley R. Riggs
Niamh Cahill
Christopher E. Bernhardt
Eduardo Leorri
David J. Mallinson
Donald C. Barber
Stephen J. Culver
and 2 others

Subjects

Geology

Topics
usa non linear processes relative sea level scale north carolina late holocene north sea

Extended late Holocene relative sea-level histories for North Carolina, USA (2017)

Abstract We produced ∼3000-year long relative sea-level (RSL) histories for two sites in North Carolina (USA) using foraminifera preserved in new and existing cores of dated salt-marsh sediment. At Cedar Island, RSL rose by ∼2.4 m during the past ∼3000 years compared to ∼3.3 m at Roanoke Island. This spatial difference arises primarily from differential GIA that caused late Holocene RSL rise to be 0.1–0.2 mm/yr faster at Roanoke Island than at Cedar Island. However, a non-linear difference in RSL between the two study regions (particularly from ∼0 CE to ∼1250 CE) indicates that additional local- to regional-scale processes drove centennial-scale RSL change in North Carolina. Therefore, the Cedar Island and Roanoke Island records should be considered as independent of one another. Between-site differences on sub-millennial timescales cannot be adequately explained by non-stationary tides, sediment compaction, or local sediment dynamics. We propose that a period of accelerating RSL rise from ∼600 CE to 1100 CE that is present at Roanoke Island (and other sites north of Cape Hatteras at least as far as Connecticut), but absent at Cedar Island (and other sites south of Cape Hatteras at least as far as northeastern Florida) is a local-to regional-scale effect of dynamic ocean and/or atmospheric circulation.
Collections Ireland -> Maynooth University -> Type = Article
Ireland -> Maynooth University -> Academic Unit = Faculty of Science and Engineering: Research Institutes: Hamilton Institute
Ireland -> Maynooth University -> Status = Published
Ireland -> Maynooth University -> Academic Unit = Faculty of Science and Engineering: Mathematics and Statistics

Full list of authors on original publication

Benjamin P. Horton, Ryan P. Mulligan, Anna L. Woodson, Stanley R. Riggs, Niamh Cahill, Christopher E. Bernhardt, Eduardo Leorri, David J. Mallinson, Donald C. Barber, Stephen J. Culver and 2 others

Experts in our system

1
Benjamin P. Horton
Maynooth University
Total Publications: 11
 
2
Niamh Cahill
Maynooth University
Total Publications: 16