Coupled Impacts of Atmospheric Circulation and Sea-Ice on Late Pleistocene Terrigenous Sediment Dynamics in the Subarctic Pacific Ocean
(2021) In Geophysical Research Letters 48(19).- 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... (More)
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.
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- author
- organization
- publishing date
- 2021-10-16
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Geophysical Research Letters
- volume
- 48
- issue
- 19
- article number
- e2021GL095312
- publisher
- American Geophysical Union (AGU)
- external identifiers
-
- scopus:85116770144
- ISSN
- 0094-8276
- DOI
- 10.1029/2021GL095312
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021. American Geophysical Union. All Rights Reserved.
- id
- 10173fd4-e987-4934-9c4c-80107fc5fe95
- date added to LUP
- 2021-10-26 11:24:27
- date last changed
- 2023-02-21 10:31:49
@article{10173fd4-e987-4934-9c4c-80107fc5fe95, abstract = {{<p>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.</p>}}, author = {{Zhong, Yi and Liu, Yanguang and Gong, Xun and Wilson, David J. and Lu, Zhengyao and Liu, Jiabo and Song, Tengfei and Gorbarenko, Sergey A. and Shi, Xuefa and Yang, Xiaoqiang and Liu, Qingsong}}, issn = {{0094-8276}}, language = {{eng}}, month = {{10}}, number = {{19}}, publisher = {{American Geophysical Union (AGU)}}, series = {{Geophysical Research Letters}}, title = {{Coupled Impacts of Atmospheric Circulation and Sea-Ice on Late Pleistocene Terrigenous Sediment Dynamics in the Subarctic Pacific Ocean}}, url = {{http://dx.doi.org/10.1029/2021GL095312}}, doi = {{10.1029/2021GL095312}}, volume = {{48}}, year = {{2021}}, }