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  Thermal Rossby waves explain multidecadal upper ocean heat content variability in the Subpolar North Atlantic

Sinha, B., Moat, B., Fraser, N., Hermanson, L., Josey, S., Macintosh, C., Berry, D., Jones, D., Sanders, R., Drijfhout, S. (2023): Thermal Rossby waves explain multidecadal upper ocean heat content variability in the Subpolar North Atlantic, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3525

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020554 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020554_1
Genre: Conference Paper

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 Creators:
Sinha, Bablu1, Author
Moat, Ben1, Author
Fraser, Neil1, Author
Hermanson, Leon1, Author
Josey, Simon1, Author
Macintosh, Claire1, Author
Berry, Dave1, Author
Jones, Dan1, Author
Sanders, Rachael1, Author
Drijfhout, Sybren1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: It is important to understanding the mechanism behind multidecadal changes in North Atlantic ocean heat storage as these directly impact the climate of the surrounding continents. We construct a multidecadal upper ocean heat budget for the North Atlantic for the period 1950 to 2020 based on multiple observational datasets and a state of the art forced global ocean model. On multidecadal timescales ocean heat transport convergence is the dominant term in all regions of the North Atlantic. In the subpolar region (north of 45N) the heat transport convergence is largely explained by anomalous geostrophic currents acting on the mean temperature gradient. The timescale and spatial distribution of the anomalous geostrophic currents are consistent with basin scale ‘thermal’ Rossby waves propagating westwards/northwestwards in the subpolar gyre. Using a forced ocean model we link the ocean heat transport convergence with variations in the Atlantic Meridional Overturning Circulation.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-3525
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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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