Articles | Volume 23, issue 2
https://doi.org/10.5194/acp-23-1769-2023
https://doi.org/10.5194/acp-23-1769-2023
Research article
 | 
01 Feb 2023
Research article |  | 01 Feb 2023

Projected increases in wildfires may challenge regulatory curtailment of PM2.5 over the eastern US by 2050

Chandan Sarangi, Yun Qian, L. Ruby Leung, Yang Zhang, Yufei Zou, and Yuhang Wang

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Cited articles

Abatzoglou, J. T. and Williams, A. P.: Impact of anthropogenic climate change on wildfire across western US forests, P. Natl. Acad. Sci. USA, 113, 11770–11775, https://doi.org/10.1073/pnas.1607171113, 2016. 
Black, C., Tesfaigzi, Y., Bassein, J. A., and Miller, L. A.: Wildfire smoke exposure and human health: Significant gaps in research for a growing public health issue, Environ. Toxicol. Pharmacol., 55, 186–195, https://doi.org/10.1016/j.etap.2017.08.022, 2017. 
Brey, S. J., Ruminski, M., Atwood, S. A., and Fischer, E. V.: Connecting smoke plumes to sources using Hazard Mapping System (HMS) smoke and fire location data over North America, Atmos. Chem. Phys., 18, 1745–1761, https://doi.org/10.5194/acp-18-1745-2018, 2018. 
Colarco, P. R., Schoeberl, M. R., Doddridge, B. G., Marufu, L. T., Torres, O., and Welton, E. J.: Transport of smoke from Canadian forest fires to the surface near Washington, D.C., Injection height, entrainment, and optical properties, J. Geophys. Res.-Atmos., 109, https://doi.org/10.1029/2003JD004248, 2004. 
Dempsey, F.: Forest Fire Effects on Air Quality in Ontario: Evaluation of Several Recent Examples, Bull. Am. Meteorol. Soc., 94, 1059–1064, https://doi.org/10.1175/BAMS-D-11-00202.1, 2013. 
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Short summary
We show that for air quality, the densely populated eastern US may see even larger impacts of wildfires due to long-distance smoke transport and associated positive climatic impacts, partially compensating the improvements from regulations on anthropogenic emissions. This study highlights the tension between natural and anthropogenic contributions and the non-local nature of air pollution that complicate regulatory strategies for improving future regional air quality for human health.
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