Woods Hole Oceanographic Institution

Anthony Kirincich

»Inner Shelf Lateral Variability
»Image Processing First Order Limits for HF radar
»HFR-based Surface Winds
»Small-scale Eddies on the Inner shelf
»Eddy Diffusivity in the Coastal Ocean
»Outer Cape Along-shelf Stress and Pressure Gradients
»Tidal and mean circulation over the inner shelf off Martha's Vineyard.
»Results from a mass drifter deployment near Martha's Vineyard
»Observations of Reynolds stresses in the inner shelf.
»Improving HF radar estimates of surface currents using signal quality metrics.
»Reynolds stress method comparison
»ADCP-based stress with the cospectra-fit method
»Oregon Wave-driven exchange
»Along-shelf Variability
»Inner-shelf eddy viscosity
»Cross-shelf transport
»Anoxia in the CCLME
»Current reversals as determinants of intertidal recruitment
»Delayed upwelling
»Long Island Sound Front

A. Kirincich and S. Lentz, The Importance of Lateral Variability on Exchange Across the Inner Shelf South of Martha’s Vineyard, MA., Journal of Geophysical Research: Oceans, (submitted)

Lateral variations in inner-shelf circulation have the potential to augment the across-shelf exchange primarily driven by the wind. This study uses a combination of high-resolution HF radar-based surface currents and a dense array of moorings south of Martha's Vineyard, MA to document the lateral variability present on the inner shelf and quantify its importance to across-shelf exchange. Averaged over an along-shelf scale of 14 km, the cumulative wind-driven across-shelf transport over the summer was less than the volume of the inner-shelf onshore of the 25-m isobath. Along-shelf variations in the wind-driven exchange were as large as the spatial mean. Independent of the wind forcing, a spatially varying time-averaged circulation, driven by a combination of tidal rectification and horizontal density gradients, resulted in along-shelf density variability, and across-shelf exchange larger than that due to wind forcing. Coherent submesoscale eddies also occurred frequently within the domain due to flow-topography effects onshore and horizontal density gradients offshore, generally with lifespans shorter than 10 hours, diameters smaller than 6 km, and vertical depths shallower than 10 meters. The across-shelf volume transport due to eddies, estimated by seeding particles within the surface current fields, was more than half the wind-driven depth-dependent exchange. Thus, accounting for the potential coherent along-shelf variability present over the inner-shelf can significantly increase estimates of the across-shelf transfer of water masses and particles.

FILE » MVCO_lattrans_v3_242825.pdf

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