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Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007

Abrahamsen, EP; Meredith, MP; Falkner, KK; Torres-Valdes, S; Leng, MJ; Alkire, MB; ... Ivanov, V; + view all (2009) Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007. Geophysical Research Letters , 36 , Article L07602. 10.1029/2009GL037341. Green open access

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Abstract

We investigate the freshwater composition of the shelf and slope of the Arctic Ocean north of the New Siberian Islands using geochemical tracer data (delta O-18, Ba, and PO4*) collected following the extreme summer of 2007. We find that the anomalous wind patterns that partly explained the sea ice minimum at this time also led to significant quantities of Pacific-derived surface water in the westernmost part of the Makarov Basin. We also find larger quantities of meteoric water near Lomonosov Ridge than were found in 1995. Dissolved barium is depleted in the upper layers in one region of our study area, probably as a result of biological activity in open waters. Increasingly ice-free conditions compromise the quantitative use of barium as a tracer of river water in the Arctic Ocean. Citation: Abrahamsen, E. P., M. P. Meredith, K. K. Falkner, S. Torres-Valdes, M. J. Leng, M. B. Alkire, S. Bacon, S. W. Laxon, I. Polyakov, and V. Ivanov (2009), Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007, Geophys. Res. Lett., 36, L07602, doi:10.1029/2009GL037341.

Type:Article
Title:Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007
Open access status:An open access version is available from UCL Discovery
DOI:10.1029/2009GL037341
Publisher version:http://dx.doi.org/10.1029/2009GL037341
Language:English
Additional information:Copyright 2009 by the American Geophysical Union.
Keywords:DISSOLVED BARIUM, RIVER-RUNOFF, OCEAN, HALOCLINE, SEA, TRANSPORT, LAYER
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences

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