NASA issued a Press Release on Arctic mercury at

http://www.nasa.gov/jpl/news/arctic-mercury-20140115/#.UtbYsPZ96nU
http://www.jpl.nasa.gov/news/news.php?release=2014-012

This is based on a new paper published on Nature which Son V. Nghiem co-authored presenting results from the BROMEX field campaign in 2012.

New science understanding of Arctic mercury processes may help in the efficacy assessment of the Minamata Convention to curb mercury pollution which specifically calls out the problem in the Arctic