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Description
This dataset provides merged data products acquired during flights over the central and eastern United States as part of the Atmospheric Carbon and Transport - America (ACT-America) project. Two aircraft platforms, the NASA Langley Beechcraft B200 King Air and the NASA Goddard Space Flight Center's C-130H Hercules, were used to collect high-quality in situ measurements across a variety of continental surfaces and atmospheric conditions. The merged data products are composed of continuous in situ measurements of atmospheric carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), ozone (O3), and ethane (C2H6, B200 aircraft only) that were averaged to uniform intervals and merged with aircraft navigation and meteorological variables as well as trace gas concentrations from discrete flask samples collected with the Programmable Flask Package (PFP). These merged data products provide integrated measurements at intervals useful to the modeling community for studying the transport and fluxes of atmospheric carbon dioxide and methane across North America.
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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Davis, K. J., Obland, M. D., Lin, B., Lauvaux, T., O'Dell, C., Meadows, B., Browell, E. V., DiGangi, J. P., Sweeney, C., McGill, M. J., Barrick, J. D., Nehrir, A. R., Yang, M. M., Bennett, J. R., Baier, B. C., Roiger, A., Pal, S., Gerken, T., Fried, A., … Pauly, R. M. (2018). ACT-America: L3 Merged In Situ Atmospheric Trace Gases and Flask Data, Eastern USA (Version 1.2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1593 Date Accessed: 2026-05-05
Davis, K.J., M.D. Obland, B. Lin, T. Lauvaux, C. O'Dell, B. Meadows, E.V. Browell, et al. “ACT-America: L3 Merged In Situ Atmospheric Trace Gases and Flask Data, Eastern USA.” ORNL Distributed Active Archive Center, January 1, 2018. doi:10.3334/ORNLDAAC/1593. Date Accessed: 2026-05-05
Davis, K. J., et al. ACT-America: L3 Merged In Situ Atmospheric Trace Gases and Flask Data, Eastern USA. 1.2, ORNL Distributed Active Archive Center, 1 Jan. 2018, doi:10.3334/ORNLDAAC/1593. Date Accessed: 2026-05-05
Cui, Yu Yan, Zhang, Li, Jacobson, Andrew R., Johnson, Matthew S., Philip, Sajeev, Baker, David, Chevallier, Frederic, Schuh, Andrew E., Liu, Junjie, Crowell, Sean, Peiro, Helene E., Deng, Feng, Basu, Sourish, Davis, Kenneth J.
Wei, Y., Shrestha, R., Pal, S., Gerken, T., Feng, S., McNelis, J., Singh, D., Thornton, M. M., Boyer, A. G., Shook, M. A., Chen, G., Baier, B. C., Barkley, Z. R., Barrick, J. D., Bennett, J. R., Browell, E. V., Campbell, J. F., Campbell, L. J., Choi, Y., Collins, J., Dobler, J., Eckl, M., Fiehn, A., Fried, A., Digangi, J. P., BartonGrimley, R., Halliday, H., Klausner, T., Kooi, S., Kostinek, J., Lauvaux, T., Lin, B., McGill, M. J., Meadows, B., Miles, N. L., Nehrir, A. R., Nowak, J. B., Obland, M., ODell, C., Fao, R. M. P., Richardson, S. J., Richter, D., Roiger, A., Sweeney, C., Walega, J., Weibring, P., Williams, C. A., Yang, M. M., Zhou, Y., Davis, K. J.
Primary Production, Ecosystems, Respiration Rate, Atmospheric Carbon Dioxide, Methane, Atmospheric Carbon Monoxide, Atmospheric Ozone, Carbon And Hydrocarbon Compounds, Cloud Top Height, Planetary Boundary Layer Height, Aerosol Backscatter, Nitrogen Compounds, Longwave Radiation, Shortwave Radiation, Air Temperature, Precipitation Amount, Agricultural Lands, Land Use/Land Cover Classification, Leaf Characteristics, Soil Chemistry, Soil Classification, Halocarbons And Halogens, Trace Gases/Trace Species, Water Vapor Mixing Ratio Profiles, Airspeed/Ground Speed, Altitude, Vertical Profiles, Attitude Characteristics, Flight Level Winds, Wind Speed, Dew Point Temperature, Wind Direction, Carbon, Weather Events, Flight Data Logs
Parazoo, Nicholas C., Bowman, Kevin W., Baier, Bianca C., Liu, Junjie, Lee, Meemong, Kuai, Le, Shiga, Yoichi, Baker, Ian, Whelan, Mary E., Feng, Sha, Krol, Maarten, Sweeney, Colm, Runkle, Benjamin R., Tajfar, Elahe, Davis, Kenneth J.
Davis, Kenneth J., Browell, Edward V., Feng, Sha, Lauvaux, Thomas, Obland, Michael D., Pal, Sandip, Baier, Bianca C., Baker, David F., Baker, Ian T., Barkley, Zachary R., Bowman, Kevin W., Cui, Yu Yan, Denning, A. Scott, DiGangi, Joshua P., Dobler, Jeremy T., Fried, Alan, Gerken, Tobias, Keller, Klaus, Lin, Bing, Nehrir, Amin R., Normile, Caroline P., ODell, Christopher W., Ott, Lesley E., Roiger, Anke, Schuh, Andrew E., Sweeney, Colm, Wei, Yaxing, Weir, Brad, Xue, Ming, Williams, Christopher A.
Wetlands, Methane, Emissions, Water Vapor Mixing Ratio Profiles, Atmospheric Carbon Dioxide, Atmospheric Carbon Monoxide, Weather Events, Aerosol Backscatter, Flight Data Logs, Cloud Top Height, Planetary Boundary Layer Height, Atmospheric Ozone, Carbon And Hydrocarbon Compounds, Halocarbons And Halogens, Trace Gases/Trace Species
Durden, David J., Metzger, Stefan, Chu, Housen, Collier, Nathan, Davis, Kenneth J., Desai, Ankur R., Kumar, Jitendra, Wieder, William R., Xu, Min, Hoffman, Forrest M.