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Description
This dataset provides the mixing ratios of reactive nitrogen and halogen species measured by the NOAA Iodide Ion Time-of-Flight Chemical Ionization Mass Spectrometer (NOAA CIMS) during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission for ATom-3 and ATom-4 campaigns. The NOAA CIMS uses chemical ionization mass spectrometric detection of gas phase organic and inorganic analytes via I- adduct formation. Measurements for ATom include N2O5 (dinitrogen pentoxide), ClNO2 (chloro nitrite), Cl2 (Chlorine), HCOOH (formic acid), C2H4O3S (hydroperoxymethyl thioformate), BrCl (bromine monochloride), BrCN (cyanogen bromide), and BrO (bromine monoxide). ATom deploys an extensive gas and aerosol payload on the NASA DC-8 aircraft for systematic, global-scale sampling of the atmosphere, profiling continuously from 0.2-13 km altitude. This comprehensive dataset will be used to improve the representation of chemically reactive gases and short-lived climate forcers in global models of atmospheric chemistry and climate.
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Veres, P. R., Neuman, J. A., & Ryerson, T. B. (2021). ATom: L2 Measurements from NOAA ToF Chemical Ionization Mass Spectrometer, Version 2 (Version 2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1921 Date Accessed: 2026-05-02
Veres, P.R., J.A. Neuman, and T.B. Ryerson. “ATom: L2 Measurements from NOAA ToF Chemical Ionization Mass Spectrometer, Version 2.” ORNL Distributed Active Archive Center, January 1, 2021. doi:10.3334/ORNLDAAC/1921. Date Accessed: 2026-05-02
Veres, P. R., et al. ATom: L2 Measurements from NOAA ToF Chemical Ionization Mass Spectrometer, Version 2. 2, ORNL Distributed Active Archive Center, 1 Jan. 2021, doi:10.3334/ORNLDAAC/1921. Date Accessed: 2026-05-02
Roozitalab, Behrooz, Hornbrook, Rebecca S., Kinnison, Douglas E., Fernandez, Rafael P., Gaubert, Benjamin, Cuevas, Carlos A., Hills, Alan J., SaizLopez, Alfonso, Emmons, Louisa K., Apel, Eric C.
Formaldehyde, Volatile Organic Compounds, Halocarbons And Halogens, Air Quality, Nitrogen Compounds
Tashmim, Linia, Porter, William C., Chen, Qianjie, Alexander, Becky, Fite, Charles H., Holmes, Christopher D., Pierce, Jeffrey R., Croft, Betty, Ishino, Sakiko
Novak, Gordon A., Fite, Charles H., Holmes, Christopher D., Veres, Patrick R., Neuman, J. Andrew, Faloona, Ian, Thornton, Joel A., Wolfe, Glenn M., Vermeuel, Michael P., Jernigan, Christopher M., Peischl, Jeff, Ryerson, Thomas B., Thompson, Chelsea R., Bourgeois, Ilann, Warneke, Carsten, Gkatzelis, Georgios I., Coggon, Mathew M., Sekimoto, Kanako, Bui, T. Paul, Dean-Day, Jonathan, Diskin, Glenn S., DiGangi, Joshua P., Nowak, John B., Moore, Richard H., Wiggins, Elizabeth B., Winstead, Edward L., Robinson, Claire, Thornhill, K. Lee, Sanchez, Kevin J., Hall, Samuel R., Ullmann, Kirk, Dollner, Maximilian, Weinzierl, Bernadett, Blake, Donald R., Bertram, Timothy H.