The occurrence, drivers, and implications of submesoscale eddies on the Martha’s Vineyard Inner Shelf
Kirincich, Anthony R.
MetadataShow full item record
KeywordGeographic location/entity; Continental shelf/slope; Circulation/ Dynamics; Currents; Eddies; Observational techniques and algorithms; Radars/Radar observations
The occurrence, drivers, and implications of small-scale O(2–5) km diameter coherent vortices, referred to as submesoscale eddies, over the inner shelf south of Martha’s Vineyard, Massachusetts, are examined using high-frequency (HF), radar-based, high-resolution (400 m) observations of surface currents. Within the 300 km2 study area, eddies occurred at rates of 1 and 4 day−1 in winter and summer, respectively. Most were less than 5 h in duration, smaller than 4 km in diameter, and rotated less than once over their lifespan; 60% of the eddies formed along the eastern edge of study area, adjacent to Wasque Shoal, and moved westward into the interior, often with relative vorticity greater than f. Eddy generation was linked to vortex stretching on the ebb and flood tide as well as the interaction of the spatially variable tide and the wind-driven currents; however, these features had complex patterns of surface divergence and stretching. Eddies located away from Wasque Shoal were related to the movement of wind-driven surface currents, as wind direction controlled where eddies formed as well as density effects. Using an analysis of particles advected within the radar-based surface currents, the observed eddies were found to be generally leaky, losing 60%–80% of particles over their lifespan, but still more retentive than the background flow. As a result, the combined translation and rotational effects of the observed eddies were an important source of lateral exchange for surface waters over the inner shelf.
Author Posting. © American Meteorological Society, 2016. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 46 (2016): 2645-2662, doi:10.1175/JPO-D-15-0191.1.
Suggested CitationJournal of Physical Oceanography 46 (2016): 2645-2662
Showing items related by title, author, creator and subject.
SEASTAR: A mission to study ocean submesoscale dynamics and small-scale atmosphere-ocean processes in coastal, shelf and polar seas Gommenginger, Christine; Chapron, Bertrand; Hogg, Andy; Buckingham, Christian; Fox-Kemper, Baylor; Eriksson, Leif; Soulat, Francois; Ubelmann, Clement; Ocampo-Torres, Francisco; Nardelli, Bruno Buongiorno; Griffin, David; Lopez-Dekker, Paco; Knudsen, Per; Andersen, Ole; Stenseng, Lars; Stapleton, Neil; Perrie, Will; Violante-Carvalho, Nelson; Schulz-Stellenfleth, Johannes; Woolf, David K.; Isern-Fontanet, Jordi; Ardhuin, Fabrice; Klein, Patrice; Mouche, Alexis; Pascual, Ananda; Capet, Xavier; Hauser, Daniele; Stoffelen, Ad; Morrow, Rosemary; Aouf, Lotfi; Breivik, Øyvind; Fu, Lee-Lueng; Johannessen, Johnny A.; Aksenov, Yevgeny; Bricheno, Lucy; Hirschi, Joel; Martin, Adrien C. H.; Martin, Adrian P.; Nurser, A. J. George; Polton, Jeff; Wolf, Judith; Johnsen, Harald; Soloviev, Alexander; Jacobs, Gregg A.; Collard, Fabrice; Groom, Steve; Kudryavtsev, Vladimir; Wilkin, John L.; Navarro, Victor; Babanin, Alexander; Martin, Matthew; Siddorn, John; Saulter, Andrew; Rippeth, Tom; Emery, Bill; Maximenko, Nikolai; Romeiser, Roland; Graber, Hans C.; Alvera Azcarate, Aida; Hughes, Chris W.; Vandemark, Douglas; da Silva, Jose; Van Leeuwen, Peter Jan; Naveira Garabato, Alberto C.; Gemmrich, Johannes; Mahadevan, Amala; Marquez, Jose; Munro, Yvonne; Doody, Sam; Burbidge, Geoff (Frontiers Media, 2019-08-13)High-resolution satellite images of ocean color and sea surface temperature reveal an abundance of ocean fronts, vortices and filaments at scales below 10 km but measurements of ocean surface dynamics at these scales are ...
Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models Medley, Brooke; Joughin, Ian; Das, Sarah B.; Steig, Eric J.; Conway, Howard; Gogineni, S.; Criscitiello, Alison S.; McConnell, Joseph R.; Smith, B. E.; van den Broeke, Michiel R.; Lenaerts, Jan T. M.; Bromwich, D. H.; Nicolas, J. P. (John Wiley & Sons, 2013-07-26)We use an airborne-radar method, verified with ice-core accumulation records, to determine the spatiotemporal variations of snow accumulation over Thwaites Glacier, West Antarctica between 1980 and 2009. We also present a ...
Synthetic Aperture Radar observations of resonantly generated internal solitary waves at Race Point Channel (Cape Cod) da Silva, Jose C. B.; Helfrich, Karl R. (American Geophysical Union, 2008-11-20)Synthetic Aperture Radar images revealed the two-dimensional propagation characteristics of short-period internal solitary waves in Race Point Channel in Massachusetts Bay. The images and in situ measurements of the flow ...