Anthropogenic emission controls reduce summertime ozone–temperature sensitivity in the United States

Li, Shuai; Wang, Haolin; Lu, Xiao

doi:https://doi.org/10.5194/acp-25-2725-2025

Articles | Volume 25, issue 4

https://doi.org/10.5194/acp-25-2725-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-2725-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 4

Research article

|

03 Mar 2025

Research article |

| 03 Mar 2025

Anthropogenic emission controls reduce summertime ozone–temperature sensitivity in the United States

Shuai Li, Haolin Wang, and Xiao Lu

Supplement

https://doi.org/10.5194/acp-25-2725-2025-supplement

Data sets

Dataset for "Anthropogenic emission controls reduce summertime ozone-temperature sensitivity in the United States" Shuai Li et al. https://doi.org/10.5281/zenodo.14250128

MERRA-2 tavg1_2d_slv_Nx: 2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Single-Level Diagnostics V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/VJAFPLI1CSIV

CEDS v-2021-04-21 Emission Data 1975-2019 (Version Apr-21-2021) P. R. O'Rourke et al. https://doi.org/10.25584/PNNLDataHub/1779095

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Short summary

Summertime ozone–temperature sensitivity has decreased by 50 % from 3.0 ppbv per K in 1990 to 1.5 ppb per K in 2021 in the US. GEOS-Chem simulations show that anthropogenic nitrogen oxide emission reduction is the dominant driver of ozone–temperature sensitivity decline by influencing both temperature direct and temperature indirect processes. Reduced ozone–temperature sensitivity has decreased ozone enhancement from low to high temperatures by an average of 6.8 ppbv across the US.