Zhong, Y;
Liu, Y;
Gong, X;
Wilson, D;
Lu, Z;
Liu, J;
Song, T;
... Liu, Q; + view all
(2021)
Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean.
Geophysical Research Letters
, 48
(19)
, Article e2021GL095312. 10.1029/2021GL095312.
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Abstract
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 that this coupled ocean-atmosphere system may have acted as a regional amplifier of global climate variability.
Type: | Article |
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Title: | Coupled impacts of atmospheric circulation and sea-ice on late Pleistocene terrigenous sediment dynamics in the subarctic Pacific Ocean |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1029/2021GL095312 |
Publisher version: | https://doi.org/10.1029/2021GL095312 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10134419 |
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