ARL News Ammonia Intercomparison at Beltsville   November 30, 2001 NOAA scientists are participating in an experimental comparison of chemical methods to measure ammonia in the atmosphere. Ammonia is the most abundant basic gas in the troposphere, and is responsible for new particle formation (in reaction with sulfur oxidation products) and ecosystem eutrophication. Despite its … Continue reading ARL News: Ammonia Intercomparison at Beltsville, MD – November 30, 2001