Articles | Volume 20, issue 5
https://doi.org/10.5194/acp-20-3107-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-3107-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
16 Mar 2020
Research article |
| 16 Mar 2020
| 16 Mar 2020
Air quality in the eastern United States and Eastern Canada for 1990–2015: 25 years of change in response to emission reductions of SO2 and NOx in the region
Jian Feng
CORRESPONDING AUTHOR
Air Quality Measurement and Analysis Research Section, Atmospheric
Science and Technology Directorate, Environment and Climate Change Canada,
Toronto, Canada
Elton Chan
Measurements, Modelling and Interpretation Section, Atmospheric
Science and Technology Directorate, Environment and Climate Change Canada,
Toronto, Canada
Robert Vet
Air Quality Measurement and Analysis Research Section, Atmospheric
Science and Technology Directorate, Environment and Climate Change Canada,
Toronto, Canada
retired from Environment and Climate Change Canada in 2018.
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- Triple oxygen isotope composition of combustion sulfate X. Sun et al. 10.1016/j.atmosenv.2023.120095
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- FVM-RANS Modeling of Air Pollutants Dispersion and Traffic Emission in Dhaka City on a Suburb Scale M. Ali et al. 10.3390/su15010673
- Inorganic chemical components in precipitation in the eastern U.S. and Eastern Canada during 1989–2016: Temporal and regional trends of wet concentration and wet deposition from the NADP and CAPMoN measurements J. Feng et al. 10.1016/j.atmosenv.2021.118367
- Role of Dust and Iron Solubility in Sulfate Formation during the Long-Range Transport in East Asia Evidenced by 17O-Excess Signatures S. Itahashi et al. 10.1021/acs.est.2c03574
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Latest update: 23 Nov 2024
Short summary
In this study, we analyzed air concentration data on SO42-, NO3-, NH4+, HNO3, and SO2 measured by CASTNET in the US and by CAPMoN in Canada to reveal the temporal and spatial trends of air pollutants over the eastern US and Eastern Canada. We also explained (1) why the reductions of SO2 were faster than SO42- and (2) why NO3- did not decrease during the cold season except in the Midwest and southern Ontario despite
NOx emissions being significantly reduced for the whole region.
In this study, we analyzed air concentration data on SO42-, NO3-, NH4+, HNO3, and SO2 measured...
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