The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments
Marine radiocarbon bomb-pulse time histories of annually resolved archives from temperate regions have been underexploited. We present here series of Δ 14 C excess from known-age annual increments of the long-lived bivalve mollusk Arctica islandica from 4 sites across the coastal North Atlantic (Ger...
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Cambridge University Press (CUP)
2012
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Online Access: | http://dx.doi.org/10.1017/s0033822200046907 |
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crcambridgeupr:10.1017/s0033822200046907 2024-09-15T17:54:28+00:00 The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments Scourse, James D Wanamaker, Alan D Weidman, Chris Heinemeier, Jan Reimer, Paula J Butler, Paul G Witbaard, Rob Richardson, Christopher A 2012 http://dx.doi.org/10.1017/s0033822200046907 en eng Cambridge University Press (CUP) Radiocarbon volume 54, issue 02, page 165-186 ISSN 0033-8222 1945-5755 journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0033822200046907 2024-08-07T04:03:33Z Marine radiocarbon bomb-pulse time histories of annually resolved archives from temperate regions have been underexploited. We present here series of Δ 14 C excess from known-age annual increments of the long-lived bivalve mollusk Arctica islandica from 4 sites across the coastal North Atlantic (German Bight, North Sea; Troms⊘, north Norway; Siglufjordur, north Icelandic shelf; Grimsey, north Icelandic shelf) combined with published series from Georges Bank and Sable Bank (NW Atlantic) and the Oyster Ground (North Sea). The atmospheric bomb pulse is shown to be a step-function whose response in the marine environment is immediate but of smaller amplitude and which has a longer decay time as a result of the much larger marine carbon reservoir. Attenuation is determined by the regional hydrographic setting of the sites, vertical mixing, processes controlling the isotopic exchange of 14 C at the air-sea boundary, 14 C content of the freshwater flux, primary productivity, and the residence time of organic matter in the sediment mixed layer. The inventories form a sequence from high magnitude-early peak (German Bight) to low magnitude-late peak (Grimsey). All series show a rapid response to the increase in atmospheric Δ 14 C excess but a slow response to the subsequent decline resulting from the succession of rapid isotopic air-sea exchange followed by the more gradual isotopic equilibration in the mixed layer due to the variable marine carbon reservoir and incorporation of organic carbon from the sediment mixed layer. The data constitute calibration scries for the use of the bomb pulse as a high-resolution dating tool in the marine environment and as a tracer of coastal ocean water masses. Article in Journal/Newspaper Arctica islandica North Atlantic North Norway Troms Cambridge University Press Radiocarbon 54 02 165 186 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Marine radiocarbon bomb-pulse time histories of annually resolved archives from temperate regions have been underexploited. We present here series of Δ 14 C excess from known-age annual increments of the long-lived bivalve mollusk Arctica islandica from 4 sites across the coastal North Atlantic (German Bight, North Sea; Troms⊘, north Norway; Siglufjordur, north Icelandic shelf; Grimsey, north Icelandic shelf) combined with published series from Georges Bank and Sable Bank (NW Atlantic) and the Oyster Ground (North Sea). The atmospheric bomb pulse is shown to be a step-function whose response in the marine environment is immediate but of smaller amplitude and which has a longer decay time as a result of the much larger marine carbon reservoir. Attenuation is determined by the regional hydrographic setting of the sites, vertical mixing, processes controlling the isotopic exchange of 14 C at the air-sea boundary, 14 C content of the freshwater flux, primary productivity, and the residence time of organic matter in the sediment mixed layer. The inventories form a sequence from high magnitude-early peak (German Bight) to low magnitude-late peak (Grimsey). All series show a rapid response to the increase in atmospheric Δ 14 C excess but a slow response to the subsequent decline resulting from the succession of rapid isotopic air-sea exchange followed by the more gradual isotopic equilibration in the mixed layer due to the variable marine carbon reservoir and incorporation of organic carbon from the sediment mixed layer. The data constitute calibration scries for the use of the bomb pulse as a high-resolution dating tool in the marine environment and as a tracer of coastal ocean water masses. |
format |
Article in Journal/Newspaper |
author |
Scourse, James D Wanamaker, Alan D Weidman, Chris Heinemeier, Jan Reimer, Paula J Butler, Paul G Witbaard, Rob Richardson, Christopher A |
spellingShingle |
Scourse, James D Wanamaker, Alan D Weidman, Chris Heinemeier, Jan Reimer, Paula J Butler, Paul G Witbaard, Rob Richardson, Christopher A The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
author_facet |
Scourse, James D Wanamaker, Alan D Weidman, Chris Heinemeier, Jan Reimer, Paula J Butler, Paul G Witbaard, Rob Richardson, Christopher A |
author_sort |
Scourse, James D |
title |
The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
title_short |
The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
title_full |
The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
title_fullStr |
The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
title_full_unstemmed |
The Marine Radiocarbon Bomb Pulse Across the Temperate North Atlantic: A Compilation of Δ14C Time Histories from Arctica Islandica Growth Increments |
title_sort |
marine radiocarbon bomb pulse across the temperate north atlantic: a compilation of δ14c time histories from arctica islandica growth increments |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0033822200046907 |
genre |
Arctica islandica North Atlantic North Norway Troms |
genre_facet |
Arctica islandica North Atlantic North Norway Troms |
op_source |
Radiocarbon volume 54, issue 02, page 165-186 ISSN 0033-8222 1945-5755 |
op_doi |
https://doi.org/10.1017/s0033822200046907 |
container_title |
Radiocarbon |
container_volume |
54 |
container_issue |
02 |
container_start_page |
165 |
op_container_end_page |
186 |
_version_ |
1810430792216608768 |