Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean
Processes controlling environmental change in the subarctic Pacific Ocean on millennial-to-orbital timescales are not well understood. Here we use a 230-kyr sedimentary record from the northwest Pacific Ocean to assess the response of late Pleistocene sediment dynamics to orbital forcing. Combining...
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ftzenodo:oai:zenodo.org:5111468 2023-05-15T13:14:57+02:00 Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean Yi Zhong 2021-07-17 https://zenodo.org/record/5111468 https://doi.org/10.5281/zenodo.5111468 unknown doi:10.5281/zenodo.5111467 https://zenodo.org/record/5111468 https://doi.org/10.5281/zenodo.5111468 oai:zenodo.org:5111468 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/article publication-article 2021 ftzenodo https://doi.org/10.5281/zenodo.511146810.5281/zenodo.5111467 2023-03-10T20:51:39Z Processes controlling environmental change in the subarctic Pacific Ocean on millennial-to-orbital timescales are not well understood. Here we use a 230-kyr sedimentary record from the northwest Pacific Ocean to assess the response of late Pleistocene sediment dynamics to orbital forcing. Combining a source-to-sink perspective based on sedimentological records with climate model reanalysis, we reveal that fluctuations in sediment provenance were closely linked to obliquity-forced changes in atmospheric circulation modes. Specifically, the position of the Aleutian Low controlled sediment transport from the Bering Sea and Aleutian arc sources. Furthermore, a distinct shift in North Pacific ocean circulation during the Last Glacial Maximum may have been related to a strengthened Siberian High. The coincidence of atmospheric mode switches with changes in sea-ice extent and North Pacific Intermediate Water formation in the marginal seas, suggests such coupled ocean-atmosphere system as a amplifier for the regional climate variability from global background. Article in Journal/Newspaper aleutian low Bering Sea Sea ice Subarctic Zenodo Bering Sea Pacific |
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ftzenodo |
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Processes controlling environmental change in the subarctic Pacific Ocean on millennial-to-orbital timescales are not well understood. Here we use a 230-kyr sedimentary record from the northwest Pacific Ocean to assess the response of late Pleistocene sediment dynamics to orbital forcing. Combining a source-to-sink perspective based on sedimentological records with climate model reanalysis, we reveal that fluctuations in sediment provenance were closely linked to obliquity-forced changes in atmospheric circulation modes. Specifically, the position of the Aleutian Low controlled sediment transport from the Bering Sea and Aleutian arc sources. Furthermore, a distinct shift in North Pacific ocean circulation during the Last Glacial Maximum may have been related to a strengthened Siberian High. The coincidence of atmospheric mode switches with changes in sea-ice extent and North Pacific Intermediate Water formation in the marginal seas, suggests such coupled ocean-atmosphere system as a amplifier for the regional climate variability from global background. |
format |
Article in Journal/Newspaper |
author |
Yi Zhong |
spellingShingle |
Yi Zhong Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
author_facet |
Yi Zhong |
author_sort |
Yi Zhong |
title |
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
title_short |
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
title_full |
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
title_fullStr |
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
title_full_unstemmed |
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
title_sort |
coupled impacts of atmospheric circulation and sea-ice on late pleistocene terrigenous sediment dynamics in the subarctic pacific ocean |
publishDate |
2021 |
url |
https://zenodo.org/record/5111468 https://doi.org/10.5281/zenodo.5111468 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
aleutian low Bering Sea Sea ice Subarctic |
genre_facet |
aleutian low Bering Sea Sea ice Subarctic |
op_relation |
doi:10.5281/zenodo.5111467 https://zenodo.org/record/5111468 https://doi.org/10.5281/zenodo.5111468 oai:zenodo.org:5111468 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.511146810.5281/zenodo.5111467 |
_version_ |
1766266236496248832 |