Relative sea-level change in Newfoundland, Canada during the past ∼3000 years.
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 recogn...
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Online Access: | http://dro.dur.ac.uk/26493/ http://dro.dur.ac.uk/26493/1/26493.pdf https://doi.org/10.1016/j.quascirev.2018.10.012 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:26493 2023-05-15T17:21:55+02:00 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. 2018-12-01 application/pdf http://dro.dur.ac.uk/26493/ http://dro.dur.ac.uk/26493/1/26493.pdf https://doi.org/10.1016/j.quascirev.2018.10.012 unknown Elsevier dro:26493 issn:0277-3791 doi:10.1016/j.quascirev.2018.10.012 http://dro.dur.ac.uk/26493/ https://doi.org/10.1016/j.quascirev.2018.10.012 http://dro.dur.ac.uk/26493/1/26493.pdf © 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/ CC-BY-NC-ND Quaternary science reviews, 2018, Vol.201, pp.89-110 [Peer Reviewed Journal] Article PeerReviewed 2018 ftunivdurham https://doi.org/10.1016/j.quascirev.2018.10.012 2020-06-04T22:25:06Z 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. Article in Journal/Newspaper Newfoundland North Atlantic Durham University: Durham Research Online Big River ENVELOPE(-125.196,-125.196,72.501,72.501) Canada Quaternary Science Reviews 201 89 110 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
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. |
format |
Article in Journal/Newspaper |
author |
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. |
spellingShingle |
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. Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
author_facet |
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. |
author_sort |
Kemp, A.C. |
title |
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
title_short |
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
title_full |
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
title_fullStr |
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
title_full_unstemmed |
Relative sea-level change in Newfoundland, Canada during the past ∼3000 years. |
title_sort |
relative sea-level change in newfoundland, canada during the past ∼3000 years. |
publisher |
Elsevier |
publishDate |
2018 |
url |
http://dro.dur.ac.uk/26493/ http://dro.dur.ac.uk/26493/1/26493.pdf https://doi.org/10.1016/j.quascirev.2018.10.012 |
long_lat |
ENVELOPE(-125.196,-125.196,72.501,72.501) |
geographic |
Big River Canada |
geographic_facet |
Big River Canada |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
Quaternary science reviews, 2018, Vol.201, pp.89-110 [Peer Reviewed Journal] |
op_relation |
dro:26493 issn:0277-3791 doi:10.1016/j.quascirev.2018.10.012 http://dro.dur.ac.uk/26493/ https://doi.org/10.1016/j.quascirev.2018.10.012 http://dro.dur.ac.uk/26493/1/26493.pdf |
op_rights |
© 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/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.10.012 |
container_title |
Quaternary Science Reviews |
container_volume |
201 |
container_start_page |
89 |
op_container_end_page |
110 |
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1766107931247378432 |