Large role of anthropogenic climate change in driving smoke concentrations across the western United States from 1992 to 2020.

Proc Natl Acad Sci U S A · 2025 · PMC12704757 · PMID 41329743

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a decreasing trendno p-value reported

Consistent with such studies, our results reveal an increase in smoke PM 2.5 around 2010, reversing a decreasing trend in total PM 2.5 across the western United States.

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an increasing trendno p-value reported

The contribution of smoke PM 2.5 to total PM 2.5 exhibits large interannual variability from 1997 to 2020, ranging from 5 to 62%, again with an increasing trend over the most recent decade ( SI Appendix , Fig.

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