An Investigation on NH sub(3) Emissions and Particulate NH super(+) sub(4)-NO super(-) sub(3) Formation in East Asia

• Published in: Atmospheric environment (1994) Vol. 40; no. 12; p. 2139
• Main Authors: Kim, J Y, Song, CH, Ghim, Y S, Won, J G, Yoon, S C, Carmichael, G R, Woo, J-H
• Format: Journal Article
• Language: English
• Published: 01.04.2006
• ISSN: 1352-2310

The accuracy of ammonia emissions in East Asia by comparison of measured and predicted NH sub(4)NO sub(3) concentrations, was evaluated. The characteristics of the formation of NH super(+) sub(4) and NO super(-) sub(3) were also discussed. The measurement data were collected from 4 ground-based stations and ACE-ASIA C130 Flights No.7, and No.10. According to the results, the predicted fine-mode NH super(+) sub(4) concentrations were 1.2-3.8 times overestimated compared to those measured on the mass basis, and fine-mode NO super(-) sub(3) concentrations were 1.9-7.6 times overestimated on the mass basis. It was revealed that aberrantly high predicted fine-mode NO super(-) sub(3) concentrations in East Asia could be attributed to the overestimated NH sub(3) emissions. It was recommended that approximately 20-75 percent reduced NH sub(3) emission fields should be used in future modeling studies for East Asia.