Characterizing the eddy field in the Arctic Ocean halocline
Cole, Sylvia T.
Krishfield, Richard A.
Toole, John M.
MetadataShow full item record
Ice-Tethered Profilers (ITP), deployed in the Arctic Ocean between 2004 and 2013, have provided detailed temperature and salinity measurements of an assortment of halocline eddies. A total of 127 mesoscale eddies have been detected, 95% of which were anticyclones, the majority of which had anomalously cold cores. These cold-core anticyclonic eddies were observed in the Beaufort Gyre region (Canadian water eddies) and the vicinity of the Transpolar Drift Stream (Eurasian water eddies). An Arctic-wide calculation of the first baroclinic Rossby deformation radius Rd has been made using ITP data coupled with climatology; Rd ∼ 13 km in the Canadian water and ∼8 km in the Eurasian water. The observed eddies are found to have scales comparable to Rd. Halocline eddies are in cyclogeostrophic balance and can be described by a Rankine vortex with maximum azimuthal speeds between 0.05 and 0.4 m/s. The relationship between radius and thickness for the eddies is consistent with adjustment to the ambient stratification. Eddies may be divided into four groups, each characterized by distinct core depths and core temperature and salinity properties, suggesting multiple source regions and enabling speculation of varying formation mechanisms.
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 119 (2014): 8800–8817, doi:10.1002/2014JC010488.
Suggested CitationArticle: Zhao, Mengnan, Timmermans, Mary-Louise, Cole, Sylvia T., Krishfield, Richard A., Proshutinsky, Andrey, Toole, John M., "Characterizing the eddy field in the Arctic Ocean halocline", Journal of Geophysical Research: Oceans 119 (2014): 8800–8817, DOI:10.1002/2014JC010488, https://hdl.handle.net/1912/7164
Showing items related by title, author, creator and subject.
Eddy transport of organic carbon and nutrients from the Chukchi Shelf : impact on the upper halocline of the western Arctic Ocean Mathis, Jeremy T.; Pickart, Robert S.; Hansell, Dennis A.; Kadko, David; Bates, Nicholas R. (American Geophysical Union, 2007-05-04)In September 2004 a detailed physical and chemical survey was conducted on an anticyclonic, cold-core eddy located seaward of the Chukchi Shelf in the western Arctic Ocean. The eddy had a diameter of ∼16 km and was centered ...
Shimada, Koji; Itoh, Motoyo; Nishino, Shigeto; McLaughlin, Fiona A.; Carmack, Eddy C.; Proshutinsky, Andrey (American Geophysical Union, 2005-02-05)We examine the varieties and spatial distributions of Pacific and Eastern Arctic origin halocline waters in the Canada Basin using 2002–2003 hydrographic data. The halocline structure in the Canada Basin is different from ...
Brown, Kristina A.; McLaughlin, Fiona A.; Tortell, Philippe D.; Yamamoto-Kawai, Michiyo; Francois, Roger (John Wiley & Sons, 2016-05-04)We examine the dissolved inorganic carbon maximum in the Canada Basin halocline using a suite of geochemical tracers to gain insight into the factors that contribute to the persistence of this feature. Hydrographic and ...