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  Deducing causal mechanisms of rising sea level and increasing freshwater content of the Beaufort Sea

Fukumori, I., Wang, O., Fenty, I. (2023): Deducing causal mechanisms of rising sea level and increasing freshwater content of the Beaufort Sea, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3181

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020374 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020374_1
Genre: Conference Paper

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 Creators:
Fukumori, Ichiro1, Author
Wang, Ou1, Author
Fenty, Ian1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Over the last two decades, sea level across the Beaufort Sea has been rising an order of magnitude faster than its global mean. This rapid regional sea level rise is mainly a halosteric change, reflecting an increase in freshwater content comparable to the Great Salinity Anomaly. Here we provide a new perspective of these variations using a global data-constrained ocean and sea ice model of the Estimating the Circulation and Climate of the Ocean (ECCO) consortium. Causal relationships are quantified using the model’s adjoint and controlling processes are identified analyzing property budgets. The study reveals wind stress and sea ice melt jointly driving the multi-decadal variation. Strengthening anticyclonic winds surrounding the Beaufort Sea intensify lateral Ekman convergence of relatively fresh near-surface water. The strengthening winds also enhance convergence of sea ice and ocean heat that increase the region’s sea ice melt. A growing disparity between where sea ice forms and where it melts results in this rare example of melting floating ice causing large-scale sea level rise. ECCO is implementing a novel “point-and-click” interface for analyzing its model, such as conducted here. We encourage and invite exploration of these tools which will be demoed (https://ecco-group.org).

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-3181
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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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