Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 9
Articles | Volume 26, issue 9
https://doi.org/10.5194/acp-26-5901-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-5901-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 9
Research article
 | 
04 May 2026
Research article |  | 04 May 2026

Processes driving the regional sensitivities of summertime PM2.5 to temperature across the US: new insights from model simulations

Lifei Yin, Yiqi Zheng, Bin Bai, Bingqing Zhang, Rachel F. Silvern, Jingqiu Mao, Loretta J. Mickley, and Pengfei Liu

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Short summary
This study improves GEOS-Chem simulations of PM2.5–temperature sensitivity and identifies key processes driving regional variability across the US. We show that chemical production dominates in the east, primary emissions in the west, and transport processes affect interannual variability. Results highlight the need for accurate temperature-dependent process representation in air quality models.
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