Wintertime Ambient Ammonia Concentrations in Northern Utah’s Urban Valleys

Ian Andrew Hammond, Utah State University, Logan, UT, United States, Randal S Martin, Utah State Univ, Logan, UT, United States, Philip Silva, USDA ARS, Bowling Green, KY, United States and Munkhbayar Baasandorj, University of Utah, Department of Atmospheric Science, Salt Lake City, UT, United States