UW News
black carbon
January 8, 2015
Epic survey finds regional patterns of soot and dirt on North American snow
![person cutting snow](https://uw-s3-cdn.s3.us-west-2.amazonaws.com/wp-content/uploads/sites/6/2015/01/04174714/Site39_Sampling2_BySteve-150x150.jpg)
University of Washington scientists published the first large-scale survey of impurities in North American snow. An almost 10,000-mile road trip showed that disturbed soil often mattered as much as air pollution for the whiteness of the snow.
January 15, 2013
International study: Where there’s smoke or smog, there’s climate change
![Scientists taking snow samples in Greenland.](https://uw-s3-cdn.s3.us-west-2.amazonaws.com/wp-content/uploads/sites/6/2013/01/04202341/BlackCarbon-tile-150x150.jpg)
A new international assessment found that soot, or black carbon, is a major contributor to global warming — second only to carbon dioxide.