Light-Absorbing Impurities in Snow: Origins, Radiative Processes, and Climate Impacts

20 Sep
Atmospheric & Environmental Chemistry Seminar
Mark Flanner, University of Michigan
Friday, September 20, 2019 - 12:00pm to 1:00pm
Pierce Hall 100F

Types of light absorbing impurities found in snow include black carbon, brown carbon, mineral dust, volcanic ash, and snow algae.  Small concentrations of these impurities can have a large impact on the reflectance and melt timing of snow.  This talk will explore the radiative processes that govern snow albedo, the origins and types of key impurities, processes that determine the concentrations of impurities within snow, and the climate impacts of snow darkening as simulated with Earth system models.