| Summary: | Snow chemistry data collected along traverses in spring 2013 and 2014 from the NW sector of the Greenland ice sheet, including both soluble ions and black carbon. In 2013, approximately 550 samples, collected at 25 sites, with sampling at 3 cm vertical resolution targeting the uppermost 21 cm of snow and the region around the 2012 melt layer. In 2014, approximately 2000 samples collected at 37 sites, with sampling intended to capture at least one year's accumulation at each site at 3 cm vertical resolution. Samples mostly represent snow which fell in 2012-2014, except a few older samples in sites of low accumulation.
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