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Sea ice production and water mass modification in the eastern Laptev Sea

Krumpen, Thomas und Hölemann, Jens A. und Willmes, Sascha und Morales Maqueda, Miguel A. und Busche, Thomas und Dmitrenko, Igor A. und Gerdes, Rüdiger und Haas, Christian und Heinemann, Günther und Hendricks, Stefan und Kassens, Heidemarie und Rabenstein, Lasse und Schröder, David (2011) Sea ice production and water mass modification in the eastern Laptev Sea. Journal of Geophysical Research - Oceans, 116 (C05014), Seiten 1-17. American Geophysical Union. DOI: 10.1029/2010JC006545. ISSN 0148-0227.

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Offizielle URL: http://www.agu.org/journals/jc/jc1105/2010JC006545/

Kurzfassung

A simple polynya flux model driven by standard atmospheric forcing is used to investigate the ice formation that took place during an exceptionally strong and consistent western New Siberian (WNS) polynya event in 2004 in the Laptev Sea. Whether formation rates are high enough to erode the stratification of the water column beneath is examined by adding the brine released during the 2004 polynya event to the average winter density stratification of the water body, preconditioned by summers with a cyclonic atmospheric forcing (comparatively weakly stratified water column). Beforehand, the model performance is tested through a simulation of a well-documented event in April 2008. Neglecting the replenishment of water masses by advection into the polynya area, we find the probability for the occurrence of density-driven convection down to the bottom to be low. Our findings can be explained by the distinct vertical density gradient that characterizes the area of the WNS polynya and the apparent lack of extreme events in the eastern Laptev Sea. The simple approach is expected to be sufficiently rigorous, since the simulated event is exceptionally strong and consistent, the ice production and salt rejection rates are likely to be overestimated, and the amount of salt rejected is distrusted over a comparatively weakly stratified water column. We conclude that the observed erosion of the halocline and formation of vertically mixed water layers during a WNS polynya event is therefore predominantly related to wind- and tidally driven turbulent mixing processes.

Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:Copyright 2011 by the American Geophysical Union.
Titel:Sea ice production and water mass modification in the eastern Laptev Sea
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Krumpen, ThomasDepartment of Sea Ice Physics, Alfred Wegener Institute, Bremerhaven, Germany
Hölemann, Jens A. Department of Observational Oceanography, Alfred Wegener Institute, Bremerhaven, Germany
Willmes, SaschaDepartment of Environmental Meteorology, University of Trier, Trier, Germany
Morales Maqueda, Miguel A. National Oceanography Centre, Liverpool, UK
Busche, ThomasMicrowave and Radar Institute, German Aerospace Center, Wessling, Germany
Dmitrenko, Igor A.Leibniz Institute of Marine Sciences, University of Kiel, Kiel, Germany
Gerdes, RüdigerDepartment of Sea Ice Physics, Alfred Wegener Institute, Bremerhaven, Germany
Haas, ChristianDepartment of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada
Heinemann, GüntherDepartment of Environmental Meteorology, University of Trier, Trier, Germany
Hendricks, StefanDepartment of Sea Ice Physics, Alfred Wegener Institute, Bremerhaven, Germany
Kassens, HeidemarieLeibniz Institute of Marine Sciences, University of Kiel, Kiel, Germany
Rabenstein, LasseInstitute of Geophysics, ETH Zurich, Zurich, Switzerland
Schröder, DavidDepartment of Environmental Meteorology, University of Trier, Trier, Germany
Datum:21 Mai 2011
Erschienen in:Journal of Geophysical Research - Oceans
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:116
DOI :10.1029/2010JC006545
Seitenbereich:Seiten 1-17
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Barton, Eric DesDepartamento de Oceanografía Instituto Investigaciones Marinas (CSIC)
Verlag:American Geophysical Union
ISSN:0148-0227
Status:veröffentlicht
Stichwörter:polynya, flux model, Laptev Sea, ice production
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Geowissenschaftl. Fernerkundungs- und GIS-Verfahren (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Thomas Edmund Busche
Hinterlegt am:07 Dez 2011 11:30
Letzte Änderung:23 Jan 2014 11:38

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