Intrinsic dynamics and long-term evolution of a convectively generated oceanic vortex in the Greenland Sea

Details Intrinsic dynamics and long-term evolution of a convectively generated oceanic vortex in the Greenland Sea Intrinsic dynamics and long-term evolution of a convectively generated oceanic vortex in the Greenland Sea

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416607r&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 16, CiteID L16607

Physics

3

Oceanography: General: Analytical Modeling And Laboratory Experiments, Oceanography: General: Water Masses, Oceanography: General: Numerical Modeling (0545, 0560), Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Internal And Inertial Waves

Scientific paper

Nonstationary dynamics, realistic long-term evolution, and influence on local convection characterizing an oceanic vortex similar to those observed in the central Greenland Sea were investigated using in situ data, a hierarchy of numerical models, and an analytical theory. A non-hydrostatic model for the simulation of convective plumes was nested into a regional ocean-ice model forced and initialized by a global, atmosphere/ocean/ice model. In the central Greenland Sea, water masses similar to those observed in a convectively-generated vortex and a corresponding numerically reconstructed 3D velocity were imposed in the non-hydrostatic model. Under atmospheric/oceanic realistic conditions and forcing, the simulated vortex evolved as an almost circular, nonstationary, long-lived, predominantly anticyclonically rotating feature. As time elapsed, it detached from the sea surface and became an intermediate vortex, which influenced the local convective preconditioning. Its inertial pulsations, shape, and velocity structure closely resemble corresponding characteristics of recently discovered theoretic nonstationary anticyclones.

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