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Description
This dataset provides atmospheric carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), water vapor (H2O), and ozone (O3) concentrations collected during airborne campaigns conducted by the Atmospheric Carbon and Transport-America (ACT-America) project. ACT-America's mission spanned 4 years and included five 6-week airborne campaigns covering all 4 seasons and 3 regions of the central and eastern United States. This dataset provides results from all five campaigns, including Summer 2016, Winter 2017, Fall 2017, Spring 2018, and Summer 2019. Two instrumented 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. CO2, CO, CH4, and H2O were collected with an infrared cavity ring-down spectrometer system (CRDS; Picarro Inc.). Ozone data were collected with a dual beam differential UV absorption ozone monitor (Model 205; 2B Technologies). Both aircraft hosted identical arrays of in situ sensors. Complete aircraft flight information including, but not limited to, latitude, longitude, altitude, and meteorological conditions are also provided.
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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DiGangi, J. P., Choi, Y., Nowak, J. B., Halliday, H. S., Yang, M. M., Baier, B. C., & Sweeney, C. (2018). ACT-America: L2 In Situ Atmospheric CO2, CO, CH4, and O3 Concentrations, Eastern USA (Version 1.2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1556 Date Accessed: 2026-05-08
DiGangi, J.P., Y. Choi, J.B. Nowak, H.S. Halliday, M.M. Yang, B.C. Baier, and C. Sweeney. “ACT-America: L2 In Situ Atmospheric CO2, CO, CH4, and O3 Concentrations, Eastern USA.” ORNL Distributed Active Archive Center, January 1, 2018. doi:10.3334/ORNLDAAC/1556. Date Accessed: 2026-05-08
DiGangi, J. P., et al. ACT-America: L2 In Situ Atmospheric CO2, CO, CH4, and O3 Concentrations, Eastern USA. 1.2, ORNL Distributed Active Archive Center, 1 Jan. 2018, doi:10.3334/ORNLDAAC/1556. Date Accessed: 2026-05-08
Barton-Grimley, Rory A., Nehrir, Amin R., Kooi, Susan A., Collins, James E., Harper, David B., Notari, Anthony, Lee, Joseph, DiGangi, Joshua P., Choi, Yonghoon, Davis, Kenneth J.
Weather Events, Atmospheric Carbon Dioxide, Methane, Aerosol Backscatter, Flight Data Logs, Atmospheric Carbon Monoxide, Atmospheric Ozone, Carbon And Hydrocarbon Compounds, Airspeed/Ground Speed, Altitude, Vertical Profiles, Attitude Characteristics, Flight Level Winds, Wind Speed, Dew Point Temperature, Wind Direction
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.
Barkley, Z. R., Davis, K. J., Feng, S., Cui, Y. Y., Fried, A., Weibring, P., Richter, D., Walega, J. G., Miller, S. M., Eckl, M., Roiger, A., Fiehn, A., Kostinek, 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
Pal, Sandip, Davis, Kenneth J., Lauvaux, Thomas, Browell, Edward V., Gaudet, Brian J., Stauffer, David R., Obland, Michael D., Choi, Yonghoon, DiGangi, Josh P., Feng, Sha, Lin, Bing, Miles, Natasha L., Pauly, Rebecca M., Richardson, Scott J., Zhang, Fuqing
Water Vapor Mixing Ratio Profiles, Methane, Atmospheric Carbon Dioxide, Atmospheric Carbon Monoxide, Atmospheric Ozone, Carbon And Hydrocarbon Compounds, Airspeed/Ground Speed, Altitude, Vertical Profiles, Attitude Characteristics, Flight Level Winds, Wind Speed, Dew Point Temperature, Wind Direction, Planetary Boundary Layer Height
Barkley, Z. R., Lauvaux, T., Davis, K. J., Deng, A., Fried, A., Weibring, P., Richter, D., Walega, J. G., DiGangi, J., Ehrman, S. H., Ren, X., Dickerson, R. R.