Journal
CONTINENTAL SHELF RESEARCH
Volume 52, Issue -, Pages 39-45Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.csr.2012.10.015
Keywords
Chukchi Sea; Submesoscales; Horizontal wavenumber spectra
Categories
Funding
- National Science Foundation Office of Polar Programs Arctic Sciences Section [ARC-11076237]
- Bureau of Ocean Energy Management
- Shell Oil company
- ConocoPhillips
- Directorate For Geosciences [1107623] Funding Source: National Science Foundation
- Office of Polar Programs (OPP) [0856531] Funding Source: National Science Foundation
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Horizontal density structure in the surface Chukchi Sea (in ice-free conditions) is investigated through analysis of high-resolution CTD data from two glider surveys. Temperature and salinity fields in the summer/fall surface layer indicate that horizontal temperature, salinity and density variability extends down to O(1) km submesoscales. Horizontal temperature and salinity gradients in the surface layer are universally non-compensating, with salinity dominating the density variability. Spectral slopes of k(-3) (k is horizontal wavenumber) of horizontal potential density variance in the surface layer were found over 0.5 to 20 km wavelengths, consistent with quasi-geostrophic turbulence scaling. The character of horizontal density structure in the surface Arctic Ocean differs from k(-2) spectra commonly observed in the lower latitudes. The observed submesoscale fronts play a role in setting surface-layer properties by restratifying the surface layer, in opposition to forcing such as winds that vertically mix the surface ocean. (c) 2012 Elsevier Ltd. All rights reserved.
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