Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation
The Bering Sea is one of the most biologically productive regions in the marine system and plays a key role in regulating the flow of waters to the Arctic Ocean and into the subarctic North Pacific Ocean. Cores from IODP Expedition 323 to the Bering Sea provide the first opportunity to obtain recons...
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American Geophysical Union
2016
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ftnerc:oai:nora.nerc.ac.uk:514398 2023-05-15T15:09:44+02:00 Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation Swann, George E.A. Snelling, Andrea M. Pike, Jennifer 2016 text http://nora.nerc.ac.uk/id/eprint/514398/ https://nora.nerc.ac.uk/id/eprint/514398/1/Swann%20et%20al_Bering%20Sea_OA.pdf https://doi.org/10.1002/2016PA002978 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/514398/1/Swann%20et%20al_Bering%20Sea_OA.pdf Swann, George E.A.; Snelling, Andrea M.; Pike, Jennifer. 2016 Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation. Paleoceanography, 31 (9). 1261-1269. https://doi.org/10.1002/2016PA002978 <https://doi.org/10.1002/2016PA002978> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2016PA002978 2023-02-04T19:43:29Z The Bering Sea is one of the most biologically productive regions in the marine system and plays a key role in regulating the flow of waters to the Arctic Ocean and into the subarctic North Pacific Ocean. Cores from IODP Expedition 323 to the Bering Sea provide the first opportunity to obtain reconstructions from the region that extend back to the Pliocene. Previous research at Bowers Ridge, south Bering Sea, has revealed stable levels of siliceous productivity over the onset of major Northern Hemisphere Glaciation (NHG) (c. 2.85-2.73 Ma). However, diatom silica isotope records of oxygen (δ18Odiatom) and silicon (δ30Sidiatom) presented here demonstrate that this interval was associated with a progressive increase in the supply of silicic acid to the region, superimposed on shift to a more dynamic environment characterized by colder temperatures and increased sea ice. This concluded at 2.58 Ma with a sharp increase in diatom productivity, further increases in photic zone nutrient availability and a permanent shift to colder sea surface conditions. These transitions are suggested to reflect a gradually more intense nutrient leakage from the subarctic northwest Pacific Ocean, with increases in productivity further aided by increased sea-ice and wind-driven mixing in the Bering Sea. In suggesting a linkage in biogeochemical cycling between the south Bering Sea and subarctic Northwest Pacific Ocean, mainly via the Kamchatka Strait, this work highlights the need to consider the inter-connectivity of these two systems when future reconstructions are carried out in the region. Article in Journal/Newspaper Arctic Arctic Ocean Bering Sea Kamchatka Sea ice Subarctic Natural Environment Research Council: NERC Open Research Archive Arctic Arctic Ocean Bering Sea Pacific Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Paleoceanography 31 9 1261 1269 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Bering Sea is one of the most biologically productive regions in the marine system and plays a key role in regulating the flow of waters to the Arctic Ocean and into the subarctic North Pacific Ocean. Cores from IODP Expedition 323 to the Bering Sea provide the first opportunity to obtain reconstructions from the region that extend back to the Pliocene. Previous research at Bowers Ridge, south Bering Sea, has revealed stable levels of siliceous productivity over the onset of major Northern Hemisphere Glaciation (NHG) (c. 2.85-2.73 Ma). However, diatom silica isotope records of oxygen (δ18Odiatom) and silicon (δ30Sidiatom) presented here demonstrate that this interval was associated with a progressive increase in the supply of silicic acid to the region, superimposed on shift to a more dynamic environment characterized by colder temperatures and increased sea ice. This concluded at 2.58 Ma with a sharp increase in diatom productivity, further increases in photic zone nutrient availability and a permanent shift to colder sea surface conditions. These transitions are suggested to reflect a gradually more intense nutrient leakage from the subarctic northwest Pacific Ocean, with increases in productivity further aided by increased sea-ice and wind-driven mixing in the Bering Sea. In suggesting a linkage in biogeochemical cycling between the south Bering Sea and subarctic Northwest Pacific Ocean, mainly via the Kamchatka Strait, this work highlights the need to consider the inter-connectivity of these two systems when future reconstructions are carried out in the region. |
format |
Article in Journal/Newspaper |
author |
Swann, George E.A. Snelling, Andrea M. Pike, Jennifer |
spellingShingle |
Swann, George E.A. Snelling, Andrea M. Pike, Jennifer Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
author_facet |
Swann, George E.A. Snelling, Andrea M. Pike, Jennifer |
author_sort |
Swann, George E.A. |
title |
Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
title_short |
Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
title_full |
Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
title_fullStr |
Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
title_full_unstemmed |
Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation |
title_sort |
biogeochemical cycling in the bering sea over the onset of major northern hemisphere glaciation |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/514398/ https://nora.nerc.ac.uk/id/eprint/514398/1/Swann%20et%20al_Bering%20Sea_OA.pdf https://doi.org/10.1002/2016PA002978 |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) |
geographic |
Arctic Arctic Ocean Bering Sea Pacific Bowers |
geographic_facet |
Arctic Arctic Ocean Bering Sea Pacific Bowers |
genre |
Arctic Arctic Ocean Bering Sea Kamchatka Sea ice Subarctic |
genre_facet |
Arctic Arctic Ocean Bering Sea Kamchatka Sea ice Subarctic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/514398/1/Swann%20et%20al_Bering%20Sea_OA.pdf Swann, George E.A.; Snelling, Andrea M.; Pike, Jennifer. 2016 Biogeochemical cycling in the Bering Sea over the onset of major Northern Hemisphere Glaciation. Paleoceanography, 31 (9). 1261-1269. https://doi.org/10.1002/2016PA002978 <https://doi.org/10.1002/2016PA002978> |
op_doi |
https://doi.org/10.1002/2016PA002978 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
9 |
container_start_page |
1261 |
op_container_end_page |
1269 |
_version_ |
1766340868029022208 |