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    Basin-width dependence of northern deep convection

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    Date
    2020-07-08
    Author
    Youngs, Madeleine K.  Concept link
    Ferrari, Raffaele  Concept link
    Flierl, Glenn R.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/26231
    As published
    https://doi.org/10.1029/2020GL089135
    DOI
    10.1029/2020GL089135
    Abstract
    Convection penetrates to the ocean bottom in the North Atlantic but not in the North Pacific. This study examines the role of basin width in shutting down high‐latitude ocean convection. Deep convection is triggered by polar cooling, but it is opposed by precipitation. A two‐layer analytical model illustrates that the overturning circulation acts to mitigate the effect of precipitation by advecting salty, dense water from subtropical latitudes to polar latitudes. The nonlinear dependence of the overturning strength on basin width makes it more efficient in a narrow basin, resulting in a convection shutdown at a stronger freshwater forcing. These predictions are confirmed by simulations with a general circulation model configured with a single closed basin to the north and a reentrant channel to the south. This suggests that basin width may play a role in suppressing convection in the North Pacific but not in the North Atlantic.
    Description
    Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 47(15), (2020): e2020GL089135, doi:10.1029/2020GL089135.
    Publisher Embargo:
    The publisher requires that this item be embargoed until 2025-07-13. Please check back after 2025-07-13.
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    • Physical Oceanography (PO)
    Suggested Citation
    Youngs, M. K., Ferrari, R., & Flierl, G. R. (2020). Basin-width dependence of northern deep convection. Geophysical Research Letters, 47(15), e2020GL089135.
     
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