Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea
The Beaufort Gyre (BG) and the Bering Strait inflow (BSI) are important elements of the Arctic Ocean circulation system and major controls on the distribution of Arctic sea ice. We report records of the quartz ∕ feldspar and chlorite ∕ illite ratios in three sediment cores from the northern Chukchi...
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ftdoajarticles:oai:doaj.org/article:d91b0127b9ac445ca0fd739593e554eb 2023-05-15T14:51:57+02:00 Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea M. Yamamoto S.-I. Nam L. Polyak D. Kobayashi K. Suzuki T. Irino K. Shimada 2017-09-01T00:00:00Z https://doi.org/10.5194/cp-13-1111-2017 https://doaj.org/article/d91b0127b9ac445ca0fd739593e554eb EN eng Copernicus Publications https://www.clim-past.net/13/1111/2017/cp-13-1111-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1111-2017 1814-9324 1814-9332 https://doaj.org/article/d91b0127b9ac445ca0fd739593e554eb Climate of the Past, Vol 13, Pp 1111-1127 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-1111-2017 2022-12-31T14:47:37Z The Beaufort Gyre (BG) and the Bering Strait inflow (BSI) are important elements of the Arctic Ocean circulation system and major controls on the distribution of Arctic sea ice. We report records of the quartz ∕ feldspar and chlorite ∕ illite ratios in three sediment cores from the northern Chukchi Sea, providing insights into the long-term dynamics of the BG circulation and the BSI during the Holocene. The quartz ∕ feldspar ratio, interpreted as a proxy of the BG strength, gradually decreased during the Holocene, suggesting a long-term decline in the BG strength, consistent with an orbitally controlled decrease in summer insolation. We propose that the BG rotation weakened as a result of the increasing stability of sea-ice cover at the margins of the Canada Basin, driven by decreasing insolation. Millennial to multi-centennial variability in the quartz ∕ feldspar ratio (the BG circulation) is consistent with fluctuations in solar irradiance, suggesting that solar activity affected the BG strength on these timescales. The BSI approximation by the chlorite ∕ illite record, despite a considerable geographic variability, consistently shows intensified flow from the Bering Sea to the Arctic during the middle Holocene, which is attributed primarily to the effect of higher atmospheric pressure over the Aleutian Basin. The intensified BSI was associated with decrease in sea-ice concentrations and increase in marine production, as indicated by biomarker concentrations, suggesting a major influence of the BSI on sea-ice and biological conditions in the Chukchi Sea. Multi-century to millennial fluctuations, presumably controlled by solar activity, were also identified in a proxy-based BSI record characterized by the highest age resolution. Article in Journal/Newspaper Arctic Arctic Ocean Bering Sea Bering Strait canada basin Chukchi Chukchi Sea Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Bering Sea Bering Strait Canada Chukchi Sea Climate of the Past 13 9 1111 1127 |
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collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 M. Yamamoto S.-I. Nam L. Polyak D. Kobayashi K. Suzuki T. Irino K. Shimada Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The Beaufort Gyre (BG) and the Bering Strait inflow (BSI) are important elements of the Arctic Ocean circulation system and major controls on the distribution of Arctic sea ice. We report records of the quartz ∕ feldspar and chlorite ∕ illite ratios in three sediment cores from the northern Chukchi Sea, providing insights into the long-term dynamics of the BG circulation and the BSI during the Holocene. The quartz ∕ feldspar ratio, interpreted as a proxy of the BG strength, gradually decreased during the Holocene, suggesting a long-term decline in the BG strength, consistent with an orbitally controlled decrease in summer insolation. We propose that the BG rotation weakened as a result of the increasing stability of sea-ice cover at the margins of the Canada Basin, driven by decreasing insolation. Millennial to multi-centennial variability in the quartz ∕ feldspar ratio (the BG circulation) is consistent with fluctuations in solar irradiance, suggesting that solar activity affected the BG strength on these timescales. The BSI approximation by the chlorite ∕ illite record, despite a considerable geographic variability, consistently shows intensified flow from the Bering Sea to the Arctic during the middle Holocene, which is attributed primarily to the effect of higher atmospheric pressure over the Aleutian Basin. The intensified BSI was associated with decrease in sea-ice concentrations and increase in marine production, as indicated by biomarker concentrations, suggesting a major influence of the BSI on sea-ice and biological conditions in the Chukchi Sea. Multi-century to millennial fluctuations, presumably controlled by solar activity, were also identified in a proxy-based BSI record characterized by the highest age resolution. |
format |
Article in Journal/Newspaper |
author |
M. Yamamoto S.-I. Nam L. Polyak D. Kobayashi K. Suzuki T. Irino K. Shimada |
author_facet |
M. Yamamoto S.-I. Nam L. Polyak D. Kobayashi K. Suzuki T. Irino K. Shimada |
author_sort |
M. Yamamoto |
title |
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
title_short |
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
title_full |
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
title_fullStr |
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
title_full_unstemmed |
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea |
title_sort |
holocene dynamics in the bering strait inflow to the arctic and the beaufort gyre circulation based on sedimentary records from the chukchi sea |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-1111-2017 https://doaj.org/article/d91b0127b9ac445ca0fd739593e554eb |
geographic |
Arctic Arctic Ocean Bering Sea Bering Strait Canada Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Bering Sea Bering Strait Canada Chukchi Sea |
genre |
Arctic Arctic Ocean Bering Sea Bering Strait canada basin Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Bering Sea Bering Strait canada basin Chukchi Chukchi Sea Sea ice |
op_source |
Climate of the Past, Vol 13, Pp 1111-1127 (2017) |
op_relation |
https://www.clim-past.net/13/1111/2017/cp-13-1111-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1111-2017 1814-9324 1814-9332 https://doaj.org/article/d91b0127b9ac445ca0fd739593e554eb |
op_doi |
https://doi.org/10.5194/cp-13-1111-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
9 |
container_start_page |
1111 |
op_container_end_page |
1127 |
_version_ |
1766323085369147392 |