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  The importance of the Irminger Gyre to the subpolar North Atlantic overturning on monthly timescales

Sanchez-Franks, A., Holliday, P., Evans, D. G., Fried, N., Tooth, O., Chafik, L., Fu, Y., Li, F., De Jong, M. F., Johnson, H. (2023): The importance of the Irminger Gyre to the subpolar North Atlantic overturning on monthly timescales, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0971

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016503 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016503_2
Genre: Conference Paper

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 Creators:
Sanchez-Franks, Alejandra1, Author
Holliday, Penny1, Author
Evans, Dafydd Gwyn1, Author
Fried, Nora1, Author
Tooth, Oliver1, Author
Chafik, Leon1, Author
Fu, Yao1, Author
Li, Feili1, Author
De Jong, M. Femke1, Author
Johnson, Helen1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: The lower limb of the Atlantic meridional overturning circulation (AMOC) is the net equatorward flow of dense waters that have been transformed due to the cooling and freshening of the lighter, poleward-flowing, upper limb waters. In the subpolar North Atlantic (SPNA), upper limb variability is primarily set by the North Atlantic Current, whereas lower limb variability is less well understood, particularly at subseasonal timescales. Using observations from a SPNA mooring array between Greenland and Scotland, we show that variability of the AMOC’s lower limb is connected to poleward flow in the interior Irminger Sea. We identify this flow as the northward branch of the Irminger Gyre (IG), accounting for over 55% of the AMOC’s lower limb variability on monthly timescales. Increasing thickness of intermediate water within the Irminger Sea coincides with decreasing IG recirculation on interannual timescales. Wind stress curl fluctuations over the Labrador Sea, associated with the North Atlantic Oscillation, drive the IG on monthly timescales.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0971
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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