Multidecadal preconditioning of the Maud Rise polynya region
In this paper, we consider Maud Rise polynya formation in a long (250-year) high-resolution (ocean 0.1 ∘ , atmosphere 0.5 ∘ horizontal model resolution) of the Community Earth System Model. We find a dominant multidecadal timescale in the occurrence of these Maud Rise polynyas. Analysis of the resul...
Published in: | Ocean Science |
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
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Subjects: | |
Online Access: | https://doi.org/10.5194/os-16-1443-2020 https://doaj.org/article/41549f34f1744a6a8d02b648adc34859 |
Summary: | In this paper, we consider Maud Rise polynya formation in a long (250-year) high-resolution (ocean 0.1 ∘ , atmosphere 0.5 ∘ horizontal model resolution) of the Community Earth System Model. We find a dominant multidecadal timescale in the occurrence of these Maud Rise polynyas. Analysis of the results leads us to the interpretation that a preferred timescale can be induced by the variability of the Weddell Gyre, previously identified as the Southern Ocean Mode. The large-scale pattern of heat content variability associated with the Southern Ocean Mode modifies the stratification in the Maud Rise region and leads to a preferred timescale in convection through preconditioning of the subsurface density and consequently to polynya formation. |
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