Role of chemical production and depositional losses on formaldehyde in the Community Regional Atmospheric Chemistry Multiphase Mechanism (CRACMM)

Skipper, T. Nash; D'Ambro, Emma L.; Wiser, Forwood C.; McNeill, V. Faye; Schwantes, Rebecca H.; Henderson, Barron H.; Piletic, Ivan R.; Baublitz, Colleen B.; Bash, Jesse O.; Whitehill, Andrew R.; Valin, Lukas C.; Mouat, Asher P.; Kaiser, Jennifer; Wolfe, Glenn M.; St. Clair, Jason M.; Hanisco, Thomas F.; Fried, Alan; Place, Bryan K.; Pye, Havala O.T.

doi:https://doi.org/10.5194/acp-24-12903-2024

Articles | Volume 24, issue 22

https://doi.org/10.5194/acp-24-12903-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-12903-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 22

Research article

|

21 Nov 2024

Research article |

| 21 Nov 2024

Role of chemical production and depositional losses on formaldehyde in the Community Regional Atmospheric Chemistry Multiphase Mechanism (CRACMM)

T. Nash Skipper, Emma L. D'Ambro, Forwood C. Wiser, V. Faye McNeill, Rebecca H. Schwantes, Barron H. Henderson, Ivan R. Piletic, Colleen B. Baublitz, Jesse O. Bash, Andrew R. Whitehill, Lukas C. Valin, Asher P. Mouat, Jennifer Kaiser, Glenn M. Wolfe, Jason M. St. Clair, Thomas F. Hanisco, Alan Fried, Bryan K. Place, and Havala O.T. Pye

Supplement

https://doi.org/10.5194/acp-24-12903-2024-supplement

Data sets

NASA FIREX-AQ 2019 DC8 Aircraft Data FIREX-AQ Team https://www-air.larc.nasa.gov/cgi-bin/ArcView/firexaq

KaiserLab-GeorgiaTech/long-term-HCHO-monitoring_efforts_datasets Kaiser Lab Georgia Tech https://doi.org/10.5281/zenodo.10855090

NASA GROUND-GOETHALS-FIELD 2023 Data NASA https://www-air.larc.nasa.gov/cgi-bin/ArcView/listos.2023

UWFPS 2017 Ground Sites Data Download UWFPS Team https://csl.noaa.gov/groups/csl7/measurements/2017uwfps/Ground/DataDownload/

Data supporting CRACMM2 formaldehyde updates H. Pye https://doi.org/10.23719/1531018

Model code and software

CMAQ Github Repository US Environmental Protection Agency https://github.com/USEPA/CMAQ

CMAQ Version 5.4 US EPA Office of Research and Development https://doi.org/10.5281/zenodo.7218076

CRACMM Github Repository US Environmental Protection Agency https://github.com/USEPA/CRACMM

Framework for 0-D Atmospheric Modeling (F0AM) Github Repository Glenn M. Wolfe https://github.com/AirChem/F0AM

HCHO Manuscript figure code T. Nash Skipper https://github.com/tnskipper/hcho_cracmm2_paper

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Short summary

We develop the Community Regional Atmospheric Chemistry Multiphase Mechanism (CRACMM) version 2 to improve predictions of formaldehyde in ambient air compared to satellite-, aircraft-, and ground-based observations. With the updated chemistry, we estimate the cancer risk from inhalation exposure to ambient formaldehyde across the contiguous USA and predict that 40 % of this risk is controllable through reductions in anthropogenic emissions of nitrogen oxides and reactive organic carbon.