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Interannual Sea Level Variability Along the Southeastern Seaboard of the United States in Relation to the Gyre-Scale Heat Divergence in the North Atlantic
  • Published Date:
    2019
  • Source:
    Geophysical Research Letters, 46(13), 7481-7490.
Filetype[PDF-1.47 MB]


Details:
  • Description:
    Abstract The low-amplitude, large-scale, interannual, and longer-term sea level changes are linked to the variations of ocean heat and freshwater content and strongly controlled by ocean dynamics. Near the coast, especially in low-lying and flood-vulnerable regions, these changes can provide background conditions favorable for the occurrence of extreme sea levels that represent a threat for coastal communities and ecosystems. In this study, we identify a tripole mode of the ocean gyre-scale sea surface height variability in the North Atlantic and show that this mode is responsible for most of the interannual-to-decadal sea surface height changes along the southeast coast of the United States, including the Gulf of Mexico. We also show that these changes are largely driven by the large-scale heat divergence related to the Atlantic Meridional Overturning Circulation and linked to the low-frequency North Atlantic Oscillation.

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