Trends in atmospheric ammonia at urban, rural, and remote sites across North
America

Yao, Xiaohong; Zhang, Leiming

doi:https://doi.org/10.5194/acp-16-11465-2016

Articles | Volume 16, issue 17

https://doi.org/10.5194/acp-16-11465-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-16-11465-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 17

Research article

|

14 Sep 2016

Research article |

| 14 Sep 2016

Trends in atmospheric ammonia at urban, rural, and remote sites across North America

Xiaohong Yao and Leiming Zhang

Supplement

https://doi.org/10.5194/acp-16-11465-2016-supplement

Data sets

The NAtChem Data Canadian Air and Precipitation Monitoring Network (CAPMoN) http://www.ec.gc.ca/natchem/default.asp?lang=En&n=90EDB4BC-1

Ammonia Monitoring Network (AMoN) D. Gay, R. Claybrooke, B. Larson, M. Rhodes, L. Volk, and C. Lehmann http://nadp.sws.uiuc.edu/AMoN

Atmospheric NH3 National Air Pollution Surveillance Program (NAPS) http://www.ec.gc.ca/rnspa-naps/

Emission date of NH3 National Pollutant Release Inventory (NPRI) http://www.ec.gc.ca/inrp-npri/default.asp?lang=En&n=4A577BB9-1

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Short summary

Atmospheric NH₃ plays an important role in forming secondary aerosols and has a direct impact on sensitive ecosystems. This study aims to study its long-term variation and find that the long-term trend can be affected by climate change as well as other anthropogenic factors, depending on sites. A large percentage increase of atmospheric NH₃ at remote American sites is surprising and may cause a potential threat to sensitive ecosystems in the future.