Sea-ice production over the Laptev Sea shelf inferred from historical summer-to-winter hydrographic observations of 1960s-1990s.

Dmitrenko, Igor A., Kirillov, Sergey A., Tremblay, L. Bruno, Bauch, Dorothea and Willmes, Sascha (2009) Sea-ice production over the Laptev Sea shelf inferred from historical summer-to-winter hydrographic observations of 1960s-1990s. Open Access Geophysical Research Letters, 36 (13). L13605. DOI 10.1029/2009GL038775.

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Abstract

The winter net sea-ice production (NSIP) over the Laptev Sea shelf is inferred from continuous summer-to-winter historical salinity records of 1960s–1990s. While the NSIP strongly depends on the assumed salinity of newly formed ice, the NSIP quasi-decadal variability can be linked to the wind-driven circulation anomalies in the Laptev Sea region. The increased wind-driven advection of ice away from the Laptev Sea coast when the Arctic Oscillation (AO) is positive implies enhanced coastal polynya sea-ice production and brine release in the shelf water. When the AO is negative, the NSIP and seasonal salinity amplitude tends to weaken. These results are in reasonable agreement with sea-ice observations and modeling.

Document Type: Article
Keywords: Seasonal salinity difference; Sea-ice formation; Coastal polynya; Arctic and Antarctic oceanography; Continental shelf and slope processes; Decadal ocean variability; Ice mechanics and air/sea/ice exchange processes
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2009GL038775
ISSN: 1944–8007
Projects: Laptev Sea System, Permafrost
Date Deposited: 01 Sep 2009 16:01
Last Modified: 07 Nov 2017 13:16
URI: http://oceanrep.geomar.de/id/eprint/2800

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