Ammonia sources in the California South Coast Air Basin and their impact on ammonium nitrate formation
作者： J. B. Nowak , J. A. Neuman , R. Bahreini , A. M. Middlebrook , J. S. Holloway
DOI: 10.1029/2012GL051197
关键词:
摘要: [1] Observations from the NOAA WP-3D aircraft during CalNex in May and June 2010 are used to quantify ammonia (NH3) emissions automobiles dairy facilities California South Coast Air Basin (SoCAB) assess their impact on particulate ammonium nitrate (NH4NO3) formation. These airborne measurements SoCAB estimate automobile NH3 emissions, 62 ± 24 metric tons day−1, facility 33 ± 16 176 ± 88 day−1. Emission inventories agree with observed NH3:CO emission ratio, but substantially underpredict emissions. Conditions downwind of were always thermodynamically favorable for NH4NO3 formation due high mixing ratios concentrated sources. Although generated lower ratios, they also can favor As an aerosol control strategy, addressing source would have larger reducing
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