Congratulations to Ross Petersen and Dr. Gannet Hallar for their work on the recently published paper titled “The Role of Coarse Aerosol Particles as a Sink of HNO3 in Wintertime Pollution Events in the Salt Lake Valley.”
Ross and Gannet are both co-authors on the publication which analyzes the chemistry that accompanies wintertime pollution events, also referred to as inversions, in the Salt Lake Valley. The paper finds that nitric acid (HNO3) is removed from the atmosphere by coarse aerosol particles. Since HNO3 reacts with ammonia (NH3) to form ammonium nitrate (NH4NO3), the uptake of HNO3 limits the formation of NH4NO3, which is a significant contributor to wintertime PM2.5 pollution. The paper can be found here: https://acp.copernicus.org/preprints/acp-2020-21/acp-2020-21.pdf.
Ross, who graduated from the University of Utah with an M.S. in Atmospheric Sciences, is currently pursuing a Ph.D. at the University of Lund in Sweden.