Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007
Article first published online: 2 APR 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 7, April 2009
How to Cite
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., , , , , , , , , and (
- Issue published online: 2 APR 2009
- Article first published online: 2 APR 2009
- Manuscript Accepted: 5 MAR 2009
- Manuscript Revised: 20 FEB 2009
- Manuscript Received: 18 JAN 2009
- stable isotopes;
- dissolved barium
 We investigate the freshwater composition of the shelf and slope of the Arctic Ocean north of the New Siberian Islands using geochemical tracer data (δ18O, 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.