Seasonally derived components of the Canada Basin halocline
Name
Marshall Timmermans_et_al-2017-Geophysical_Research_Letters.pdf
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1.76 MB
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Author(s)
Timmermans, Mary-Louise
Proshutinsky, Andrey
Marshall, John C
Scott, Jeremy
Date Issued
April 2017
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Timmermans, Mary-Louise, John Marshall, Andrey Proshutinsky, and Jeffery Scott. “Seasonally Derived Components of the Canada Basin Halocline.” Geophysical Research Letters 44, no. 10 (May 26, 2017): 5008–5015.
Version
Final published version
Abstract
The Arctic halocline stratification is an important barrier to the transport of deep ocean heat to the underside of sea ice. Surface water in the Chukchi Sea, warmed in summer by solar radiation, ventilates the Canada Basin halocline to create a warm layer below the mixed‐layer base. The year‐round persistence of this layer is shown to be consistent with the seasonal cycle of halocline ventilation. We present hydrographic observations and model results to show how Chukchi Sea density outcrops migrate seasonally as surface fluxes modify salinity and temperature. This migration is such that in winter, isopycnals bounding the warm halocline are blocked from ventilation, while the cool, relatively salty and deeper halocline layers are ventilated. In this way, the warm halocline is isolated by stratification (both vertically and laterally) each winter. Results shed light on the fate and impact to sea ice of the warm halocline under future freshening and warming of the surface Arctic Ocean.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1002/2017GL073042
