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

被引：40

作者：

Abrahamsen, E. Povl ^{[1
]}

Meredith, Michael P. ^{[1
]}

Falkner, Kelly Kenison ^{[2
]}

Torres-Valdes, Sinhue ^{[3
]}

Leng, Melanie J. ^{[6
]}

Alkire, Matthew B. ^{[2
]}

Bacon, Sheldon ^{[3
]}

Laxon, Seymour W. ^{[5
]}

Polyakov, Igor ^{[7
]}

Ivanov, Vladimir ^{[4
]}

机构：

[1] British Antarctic Survey, Nat Environm Res Council, Cambridge CB3 0ET, England

[2] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA

[3] Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England

[4] Scottish Assoc Marine Sci, Oban PA37 1QA, Argyll, Scotland

[5] UCL, Ctr Polar Observat & Modelling, London WC1E 6BT, England

[6] British Geol Survey, NERC Isotope Geosciences Lab, Keyworth NG12 5GG, Notts, England

[7] Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK 99775 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

英国自然环境研究理事会; 美国国家科学基金会;

关键词：

DISSOLVED BARIUM; RIVER-RUNOFF; HALOCLINE; OCEAN; TRANSPORT; LAYER; SEA;

D O I：

10.1029/2009GL037341

中图分类号：

P [天文学、地球科学];

学科分类号：

070403 [天体物理学];

摘要：

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.

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