Influences of the ocean surface mixed layer and thermohaline stratification on Arctic Sea ice in the central Canada Basin
Toole, John M.
Perovich, Donald K.
Krishfield, Richard A.
Richter-Menge, Jackie A.
MetadataShow full item record
Variations in the Arctic central Canada Basin mixed layer properties are documented based on a subset of nearly 6500 temperature and salinity profiles acquired by Ice-Tethered Profilers during the period summer 2004 to summer 2009 and analyzed in conjunction with sea ice observations from ice mass balance buoys and atmosphere-ocean heat flux estimates. The July–August mean mixed layer depth based on the Ice-Tethered Profiler data averaged 16 m (an overestimate due to the Ice-Tethered Profiler sampling characteristics and present analysis procedures), while the average winter mixed layer depth was only 24 m, with individual observations rarely exceeding 40 m. Guidance interpreting the observations is provided by a 1-D ocean mixed layer model. The analysis focuses attention on the very strong density stratification at the base of the mixed layer in the Canada Basin that greatly impedes surface layer deepening and thus limits the flux of deep ocean heat to the surface that could influence sea ice growth/decay. The observations additionally suggest that efficient lateral mixed layer restratification processes are active in the Arctic, also impeding mixed layer deepening.
Author Posting. © American Geophysical Union, 2010. 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 115 (2010): C10018, doi:10.1029/2009JC005660.
Suggested CitationArticle: Toole, John M., Timmermans, Mary-Louise, Perovich, Donald K., Krishfield, Richard A., Proshutinsky, Andrey, Richter-Menge, Jackie A., "Influences of the ocean surface mixed layer and thermohaline stratification on Arctic Sea ice in the central Canada Basin", Journal of Geophysical Research 115 (2010): C10018, DOI:10.1029/2009JC005660, https://hdl.handle.net/1912/4287
Showing items related by title, author, creator and subject.
Numerical investigation of the Arctic ice–ocean boundary layer and implications for air–sea gas fluxes Bigdeli, Arash; Loose, Brice; Nguyen, An T.; Cole, Sylvia T. (Copernicus Publications on behalf of the European Geosciences Union, 2017-01-23)In ice-covered regions it is challenging to determine constituent budgets – for heat and momentum, but also for biologically and climatically active gases like carbon dioxide and methane. The harsh environment and relative ...
The seasonal variability of the Arctic Ocean Ekman transport and its role in the mixed layer heat and salt fluxes Yang, Jiayan (American Meteorological Society, 2006-10-15)The oceanic Ekman transport and pumping are among the most important parameters in studying the ocean general circulation and its variability. Upwelling due to the Ekman transport divergence has been identified as a leading ...
Timmermans, Mary-Louise; Cole, Sylvia T.; Toole, John M. (American Meteorological Society, 2012-04)Ice-tethered profiler (ITP) measurements from the Arctic Ocean’s Canada Basin indicate an ocean surface layer beneath sea ice with significant horizontal density structure on scales of hundreds of kilometers to the order ...