Modified halocline water over the Laptev Sea continental margin : historical data analysis.

Dmitrenko, Igor A., Kirillov, Sergey A., Ivanov, Vladimir V., Rudels, Bert, Nuno, Serra and Koldunov, Nikolay V. (2012) Modified halocline water over the Laptev Sea continental margin : historical data analysis. Open Access Journal of Climate, 25 . pp. 5556-5565. DOI 10.1175/JCLI-D-11-00336.1.

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Abstract

Historical hydrographic data (1940s–2010) show a distinct cross-slope difference of the lower halocline water (LHW) over the Laptev Sea continental margins. Over the slope, the LHW is on average warmer and saltier by 0.2°C and 0.5 psu, respectively, relative to the off-slope LHW. The LHW temperature time series constructed from the on-slope historical records are related to the temperature of the Atlantic Water (AW) boundary current transporting warm water from the North Atlantic Ocean. In contrast, the on-slope LHW salinity is linked to the sea ice and wind forcing over the potential upstream source region in the Barents and northern Kara Seas, as also indicated by hydrodynamic model results. Over the Laptev Sea continental margin, saltier LHW favors weaker salinity stratification that, in turn, contributes to enhanced vertical mixing with underlying AW.

Document Type: Article
Keywords: Arctic; Boundary currents; Water masses; Numerical analysis/modeling; Interannual variability
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1175/JCLI-D-11-00336.1
ISSN: 0894-8755
Projects: Polynya, Laptev Sea System
Date Deposited: 02 Dec 2014 11:52
Last Modified: 24 Aug 2017 12:46
URI: http://oceanrep.geomar.de/id/eprint/25989

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