Dynamics of the direct intrusion of Gulf Stream ring water onto the Mid-Atlantic Bight shelf
MetadataShow full item record
KeywordMid-Atlantic Bight; Cross-shelf exchange; Onshore intrusion; Warm-core ring; OOI Pioneer Array; Vorticity dynamics
Onshore intrusions of offshore waters onto the Mid-Atlantic Bight shelf can greatly affect shelf circulation, biogeochemistry, and fisheries. Previous studies have concentrated on onshore intrusions of slope water. Here we present a direct intrusion of Gulf Stream warm-core ring water onto the shelf representing a previously unknown exchange process at the shelfbreak. Impingement of warm-core rings at the shelfbreak generates along-isobath intrusions that grow like Pinocchio's nose, extending hundreds of kilometers to the southwest. By combining satellite and Ocean Observatory Initiative Pioneer Array data and idealized numerical simulations, we discover that the intrusion results from topographically induced vorticity variation of the ring water, rather than from entrainment of the shelfbreak frontal jet. This intrusion of the Gulf Stream ring water has important biogeochemical implications and could facilitate migration of marine species across the shelfbreak barrier and transport low-nutrient surface Gulf Stream ring water to the otherwise productive shelfbreak region.
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Geophysical Research Letters 42 (2015): 7687–7695, doi:10.1002/2015GL065530.
Suggested CitationGeophysical Research Letters 42 (2015): 7687–7695
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International
Showing items related by title, author, creator and subject.
Gulf Stream ring water intrusion on the Mid-Atlantic Bight continental shelf break affects microbially driven carbon cycling Hoarfrost, Adrienne; Balmonte, John Paul; Ghobrial, Sherif; Ziervogel, Kai; Bane, John M.; Gawarkiewicz, Glen G.; Arnosti, Carol (Frontiers Media, 2019-07-11)Warm core, anticyclonic rings that spin off from the Gulf Stream circulate through the region directly offshore of the Mid-Atlantic Bight. If a warm core ring reaches the continental shelf break, its warm, highly saline ...
Intrinsic nonlinearity and spectral structure of internal tides at an idealized Mid-Atlantic Bight shelf break Zhang, Weifeng G.; Duda, Timothy F. (American Meteorological Society, 2013-12)To quantify dynamical aspects of internal-tide generation at the Mid-Atlantic Bight shelf break, this study employs an idealized ocean model initialized by climatological summertime stratification and forced by monochromatic ...
Zhang, Weifeng G.; Partida, Jacob (American Geophysical Union, 2018-10-15)This work studies the subduction of the shelf water along the onshore edge of a warm‐core ring that impinges on the edge of the Mid‐Atlantic Bight continental shelf. The dynamical analysis is based on observations by ...