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Tracer‐derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007
Author(s) -
Abrahamsen E. Povl,
Meredith Michael P.,
Falkner Kelly Kenison,
TorresValdes Sinhue,
Leng Melanie J.,
Alkire Matthew B.,
Bacon Sheldon,
Laxon Seymour W.,
Polyakov Igor,
Ivanov Vladimir
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl037341
Subject(s) - oceanography , arctic , tracer , geology , ridge , sea ice , continental shelf , water mass , the arctic , barium , climatology , paleontology , physics , nuclear physics , inorganic chemistry , chemistry
We investigate the freshwater composition of the shelf and slope of the Arctic Ocean north of the New Siberian Islands using geochemical tracer data ( δ 18 O, Ba, and PO* 4 ) 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.