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Coupled Impacts of Atmospheric Circulation and Sea-Ice on Late Pleistocene Terrigenous Sediment Dynamics in the Subarctic Pacific Ocean

Zhong, Yi ; Liu, Yanguang ; Gong, Xun ; Wilson, David J. ; Lu, Zhengyao LU ; Liu, Jiabo ; Song, Tengfei ; Gorbarenko, Sergey A. ; Shi, Xuefa and Yang, Xiaoqiang , et al. (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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organization
publishing date
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}},
}