A.C. Kemp
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years
Kemp, A.C.; Wright, A.J.; Edwards, R.J.; Barnett, R.L.; Brain, M.J.; Kopp, R.E.; Cahill, N.; Horton, B.P.; Charman, D.J.; Hawkes, A.D.; Hill, T.D.; van de Plassche, O.
Authors
A.J. Wright
R.J. Edwards
R.L. Barnett
Dr Matthew Brain matthew.brain@durham.ac.uk
Associate Professor
R.E. Kopp
N. Cahill
B.P. Horton
D.J. Charman
A.D. Hawkes
T.D. Hill
O. van de Plassche
Abstract
Several processes contributing to coastal relative sea-level (RSL) change in the North Atlantic Ocean are observed and/or predicted to have distinctive spatial expressions that vary by latitude. To expand the latitudinal range of RSL records spanning the past ∼3000 years and the likelihood of recognizing the characteristic fingerprints of these processes, we reconstructed RSL at two sites (Big River and Placentia) in Newfoundland from salt-marsh sediment. Bayesian transfer functions established the height of former sea level from preserved assemblages of foraminifera and testate amoebae. Age-depth models constrained by radiocarbon dates and chronohorizons estimated the timing of sediment deposition. During the past ∼3000 years, RSL rose by ∼3.0 m at Big River and by ∼1.5 m at Placentia. A locally calibrated geotechnical model showed that post-depositional lowering through sediment compaction was minimal. To isolate and quantify contributions to RSL from global, regional linear, regional non-linear, and local-scale processes, we decomposed the new reconstructions (and those in an expanded, global database) using a spatio-temporal statistical model. The global component confirms that 20th century sea-level rise occurred at the fastest, century-scale rate in over 3000 years (P > 0.999). Distinguishing the contributions from local and regional non-linear processes is made challenging by a sparse network of reconstructions. However, only a small contribution from local-scale processes is necessary to reconcile RSL reconstructions and modeled RSL trends. We identified three latitudinally-organized groups of sites that share coherent regional non-linear trends and indicate that dynamic redistribution of ocean mass by currents and/or winds was likely an important driver of sea-level change in the North Atlantic Ocean during the past ∼3000 years.
Citation
Kemp, A., Wright, A., Edwards, R., Barnett, R., Brain, M., Kopp, R., …van de Plassche, O. (2018). Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. Quaternary Science Reviews, 201, 89-110. https://doi.org/10.1016/j.quascirev.2018.10.012
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 10, 2018 |
Online Publication Date | Oct 20, 2018 |
Publication Date | Dec 1, 2018 |
Deposit Date | Oct 11, 2018 |
Publicly Available Date | Oct 20, 2019 |
Journal | Quaternary Science Reviews |
Print ISSN | 0277-3791 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 201 |
Pages | 89-110 |
DOI | https://doi.org/10.1016/j.quascirev.2018.10.012 |
Files
Accepted Journal Article
(2.3 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by-nc-nd/4.0/
Copyright Statement
© 2018 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
You might also like
Foreword: Remembering Professor David Scott's Contribution to the IGCP Community
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search