Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism
On glacial-interglacial and millennial timescales, sea ice is an important player in the circulation and primary productivity of high latitude oceans, affecting regional and global biogeochemical cycling. In the modern North Pacific, brine rejection during sea-ice freezing in the Sea of Okhotsk driv...
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/134775/ https://doi.org/10.1016/j.quascirev.2020.106549 https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:134775 2023-08-27T04:08:45+02:00 Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism Detlef, Henrieka Sosdian, Sindia M. Belt, Simon T. Smik, Lukas Lear, Caroline H. Kender, Sev Pearce, Christof Hall, Ian R. 2020-11-15 application/pdf https://orca.cardiff.ac.uk/id/eprint/134775/ https://doi.org/10.1016/j.quascirev.2020.106549 https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf en eng Elsevier https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf Detlef, Henrieka, Sosdian, Sindia M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Belt, Simon T., Smik, Lukas, Lear, Caroline H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430, Kender, Sev, Pearce, Christof and Hall, Ian R. https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2020. Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism. Quaternary Science Reviews 248 , 106549. 10.1016/j.quascirev.2020.106549 https://doi.org/10.1016/j.quascirev.2020.106549 file https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf doi:10.1016/j.quascirev.2020.106549 cc_by_nc_nd Article PeerReviewed 2020 ftunivcardiff https://doi.org/10.1016/j.quascirev.2020.106549 2023-08-10T22:35:39Z On glacial-interglacial and millennial timescales, sea ice is an important player in the circulation and primary productivity of high latitude oceans, affecting regional and global biogeochemical cycling. In the modern North Pacific, brine rejection during sea-ice freezing in the Sea of Okhotsk drives the formation of North Pacific Intermediate Water (NPIW) that ventilates the North Pacific Ocean at 300 m to 1000 m water depth. Glacial intervals of the late Quaternary, however, experienced a deepening of glacial NPIW to at least 2000 m, with the strongest ventilation observed during cold stadial conditions of the last deglaciation. However, the origin of the shifts in NPIW ventilation is poorly understood. Numerical simulations suggest an atmospheric teleconnection between the North Atlantic and the North Pacific, in response to a slowdown or shutdown of the Atlantic meridional overturning circulation. This leads to a build-up of salinity in the North Pacific surface ocean, triggering deep ventilation. Alternatively, increased sea-ice formation in the North Pacific and its marginal seas may have caused strengthened overturning in response to enhanced brine rejection. Here we use a multi-proxy approach to explore sea-ice dynamics, sedimentary redox chemistry, and benthic ecology at Integrated Ocean Drilling Program Site U1343 in the eastern Bering Sea across the last 40 ka. Our results suggest that brine rejection from enhanced sea-ice formation during early Heinrich Stadial 1 locally weakened the halocline, aiding in the initiation of deep overturning. Additionally, deglacial sea-ice retreat likely contributed to increased primary productivity and expansion of mid-depth hypoxia at Site U1343 during interstadials, confirming a vital role of sea ice in the deglacial North Pacific carbon cycle. Article in Journal/Newspaper Bering Sea North Atlantic Sea ice Cardiff University: ORCA (Online Research @ Cardiff) Bering Sea Okhotsk Pacific Quaternary Science Reviews 248 106549 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
description |
On glacial-interglacial and millennial timescales, sea ice is an important player in the circulation and primary productivity of high latitude oceans, affecting regional and global biogeochemical cycling. In the modern North Pacific, brine rejection during sea-ice freezing in the Sea of Okhotsk drives the formation of North Pacific Intermediate Water (NPIW) that ventilates the North Pacific Ocean at 300 m to 1000 m water depth. Glacial intervals of the late Quaternary, however, experienced a deepening of glacial NPIW to at least 2000 m, with the strongest ventilation observed during cold stadial conditions of the last deglaciation. However, the origin of the shifts in NPIW ventilation is poorly understood. Numerical simulations suggest an atmospheric teleconnection between the North Atlantic and the North Pacific, in response to a slowdown or shutdown of the Atlantic meridional overturning circulation. This leads to a build-up of salinity in the North Pacific surface ocean, triggering deep ventilation. Alternatively, increased sea-ice formation in the North Pacific and its marginal seas may have caused strengthened overturning in response to enhanced brine rejection. Here we use a multi-proxy approach to explore sea-ice dynamics, sedimentary redox chemistry, and benthic ecology at Integrated Ocean Drilling Program Site U1343 in the eastern Bering Sea across the last 40 ka. Our results suggest that brine rejection from enhanced sea-ice formation during early Heinrich Stadial 1 locally weakened the halocline, aiding in the initiation of deep overturning. Additionally, deglacial sea-ice retreat likely contributed to increased primary productivity and expansion of mid-depth hypoxia at Site U1343 during interstadials, confirming a vital role of sea ice in the deglacial North Pacific carbon cycle. |
format |
Article in Journal/Newspaper |
author |
Detlef, Henrieka Sosdian, Sindia M. Belt, Simon T. Smik, Lukas Lear, Caroline H. Kender, Sev Pearce, Christof Hall, Ian R. |
spellingShingle |
Detlef, Henrieka Sosdian, Sindia M. Belt, Simon T. Smik, Lukas Lear, Caroline H. Kender, Sev Pearce, Christof Hall, Ian R. Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
author_facet |
Detlef, Henrieka Sosdian, Sindia M. Belt, Simon T. Smik, Lukas Lear, Caroline H. Kender, Sev Pearce, Christof Hall, Ian R. |
author_sort |
Detlef, Henrieka |
title |
Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
title_short |
Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
title_full |
Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
title_fullStr |
Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
title_full_unstemmed |
Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism |
title_sort |
late quaternary sea-ice and sedimentary redox conditions in the eastern bering sea – implications for ventilation of the mid-depth north pacific and an atlantic-pacific seesaw mechanism |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://orca.cardiff.ac.uk/id/eprint/134775/ https://doi.org/10.1016/j.quascirev.2020.106549 https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf |
geographic |
Bering Sea Okhotsk Pacific |
geographic_facet |
Bering Sea Okhotsk Pacific |
genre |
Bering Sea North Atlantic Sea ice |
genre_facet |
Bering Sea North Atlantic Sea ice |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf Detlef, Henrieka, Sosdian, Sindia M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Belt, Simon T., Smik, Lukas, Lear, Caroline H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430, Kender, Sev, Pearce, Christof and Hall, Ian R. https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2020. Late quaternary sea-ice and sedimentary redox conditions in the eastern Bering Sea – implications for ventilation of the mid-depth North Pacific and an Atlantic-Pacific seesaw mechanism. Quaternary Science Reviews 248 , 106549. 10.1016/j.quascirev.2020.106549 https://doi.org/10.1016/j.quascirev.2020.106549 file https://orca.cardiff.ac.uk/id/eprint/134775/2/Detlef_et_al_QSR_accepted.pdf doi:10.1016/j.quascirev.2020.106549 |
op_rights |
cc_by_nc_nd |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106549 |
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Quaternary Science Reviews |
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248 |
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106549 |
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1775349624161173504 |