UW News

Sarah Doherty


November 5, 2025

The chilling effect of air pollution

White streaks in the clouds above Earth show where ships have passed.

New University of Washington-led research attributes accelerated warming to reduced cloud reflectivity. As efforts to improve air quality have reduced pollution, clouds became less mirror-like, letting more solar radiation reach Earth and revealing the true impact of greenhouse gases.


September 12, 2016

UW scientist helping direct NASA field study of clouds off Namibia

plane on tarmac

UW atmospheric scientists are part of a month-long NASA effort to learn how smoke and clouds interact.


March 9, 2016

Darkening of Greenland ice sheet due mainly to older, melting snow

ice with dark patches

A study by the UW and others finds that the darkening of the Greenland ice sheet is not due to an increase in wildfires, but is a side effect of a warming climate.


January 8, 2015

Epic survey finds regional patterns of soot and dirt on North American snow

person cutting snow

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.

A new international assessment found that soot, or black carbon, is a major contributor to global warming — second only to carbon dioxide.