Articles | Volume 19, issue 13
https://doi.org/10.5194/acp-19-8863-2019
https://doi.org/10.5194/acp-19-8863-2019
Research article
 | 
12 Jul 2019
Research article |  | 12 Jul 2019

Using satellite observations of tropospheric NO2 columns to infer long-term trends in US NOx emissions: the importance of accounting for the free tropospheric NO2 background

Rachel F. Silvern, Daniel J. Jacob, Loretta J. Mickley, Melissa P. Sulprizio, Katherine R. Travis, Eloise A. Marais, Ronald C. Cohen, Joshua L. Laughner, Sungyeon Choi, Joanna Joiner, and Lok N. Lamsal

Viewed

Total article views: 4,492 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
2,893 1,545 54 4,492 73 100
  • HTML: 2,893
  • PDF: 1,545
  • XML: 54
  • Total: 4,492
  • BibTeX: 73
  • EndNote: 100
Views and downloads (calculated since 25 Feb 2019)
Cumulative views and downloads (calculated since 25 Feb 2019)

Viewed (geographical distribution)

Total article views: 4,492 (including HTML, PDF, and XML) Thereof 4,301 with geography defined and 191 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Latest update: 18 Jul 2024
Download
Short summary
The US EPA reports a steady decrease in nitrogen oxide (NOx) emissions from fuel combustion over the 2005–2017 period, while satellite observations show a leveling off after 2009, suggesting emission reductions and related air quality gains have halted. We show the sustained decrease in NOx emissions is in fact consistent with observed trends in surface NO2 and ozone concentrations and that the flattening of the satellite trend reflects a growing influence from the non-anthropogenic background.
Altmetrics
Final-revised paper
Preprint