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  Effect of Hudson Bay closure on global and regional climate under different astronomical configurations

Wu, Z., Yin, Q., Ganopolski, A., Berger, A., Guo, Z. (2023): Effect of Hudson Bay closure on global and regional climate under different astronomical configurations. - Global and Planetary Change, 222, 104040.
https://doi.org/10.1016/j.gloplacha.2023.104040

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 Creators:
Wu, Zhipeng1, Author
Yin, Qiuzhen1, Author
Ganopolski, Andrey2, Author              
Berger, André1, Author
Guo, Zhengtang1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              

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 Abstract: During the Quaternary, the Hudson Bay switched between closed (covered by ice sheet) and open (ice sheet-free) conditions due to large variations of ice sheets. However, how the closure and opening of the Hudson Bay have affected the local and global climates is still poorly understood. Using the LOVECLIM1.3 model, here we investigate the effect of the Hudson Bay closure under glacial conditions with different astronomical configurations, greenhouse gases (GHG) concentrations and Northern Hemisphere (NH) ice volume. Our model results show that the closure of the Hudson Bay could lead to a strengthening of the Atlantic Meridional Overturning Circulation (AMOC), which in turn leads to a warming in the NH with notable warming in the Labrador Sea and northeast North Atlantic, a cooling in the Southern Hemisphere (SH) and a northward shift of the Inter-tropical Convergence Zone (ITCZ). In addition to the large-scale climate changes, the closure of Hudson Bay also leads to a strong cooling over the Hudson Bay region due to changes of surface properties and a cooling to the southeast of Greenland due to more wind-driven sea ice export from the Arctic. However, the effect of the Hudson Bay closure depends on background climate conditions, and it could weaken or slightly reinforce the effect of the ice sheets for different astronomical configurations.

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Language(s): eng - English
 Dates: 2023-02-102023-03-01
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.gloplacha.2023.104040
PIKDOMAIN: RD1 - Earth System Analysis
Organisational keyword: RD1 - Earth System Analysis
Working Group: Long-Term Dynamics of the Earth System
MDB-ID: pending
 Degree: -

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Title: Global and Planetary Change
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 222 Sequence Number: 104040 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals190
Publisher: Elsevier