Y. Wei, ORNL Environmental Sciences Division
R. Shrestha, ORNL Environmental Sciences Division
S. Pal, Texas Tech University
T. Gerken, James Madison University
S. Feng, Pennsylvania State University
J. McNelis, ORNL Environmental Sciences Division
D. Singh, ORNL Environmental Sciences Division
M. M. Thornton, ORNL Environmental Sciences Division
A. G. Boyer, ORNL Environmental Sciences Division
M. A. Shook, NASA Langley Research Center
G. Chen, NASA Langley Research Center
B. C. Baier, University of Colorado Boulder
Z. R. Barkley, Pennsylvania State University
J. D. Barrick, NASA Langley Research Center
J. R. Bennett, Bay Area Environmental Research Institute
E. V. Browell, NASA Langley Research Center
J. F. Campbell, NASA Langley Research Center
L. J. Campbell, Pennsylvania State University
Y. Choi, NASA Langley Research Center
J. Collins, NASA Langley Research Center
J. Dobler, Spectral Sensor Solutions LLC
M. Eckl, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
A. Fiehn, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
A. Fried, University of Colorado Boulder
J. P. Digangi, NASA Langley Research Center
R. Barton-Grimley, NASA Langley Research Center
H. Halliday, NASA Langley Research Center
T. Klausner, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
S. Kooi, NASA Langley Research Center
J. Kostinek, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
T. Lauvaux, Laboratoire des Sciences du Climat et de l'Environnement
B. Lin, NASA Langley Research Center
Christopher A. Williams, Clark UniversityFollow

Document Type



The ACT-America project is a NASA Earth Venture Suborbital-2 mission designed to study the transport and fluxes of greenhouse gases. The open and freely available ACT-America data sets provide airborne in situ measurements of atmospheric carbon dioxide, methane, trace gases, aerosols, clouds, and meteorological properties, airborne remote sensing measurements of aerosol backscatter, atmospheric boundary layer height and columnar content of atmospheric carbon dioxide, tower-based measurements, and modeled atmospheric mole fractions and regional carbon fluxes of greenhouse gases over the Central and Eastern United States. We conducted 121 research flights during five campaigns in four seasons during 2016–2019 over three regions of the US (Mid-Atlantic, Midwest and South) using two NASA research aircraft (B-200 and C-130). We performed three flight patterns (fair weather, frontal crossings, and OCO-2 underflights) and collected more than 1,140 h of airborne measurements via level-leg flights in the atmospheric boundary layer, lower, and upper free troposphere and vertical profiles spanning these altitudes. We also merged various airborne in situ measurements onto a common standard sampling interval, which brings coherence to the data, creates geolocated data products, and makes it much easier for the users to perform holistic analysis of the ACT-America data products. Here, we report on detailed information of data sets collected, the workflow for data sets including storage and processing of the quality controlled and quality assured harmonized observations, and their archival and formatting for users. Finally, we provide some important information on the dissemination of data products including metadata and highlights of applications of ACT-America data sets.

Supporting data is also available as supplementary download.

Publication Title

Earth and Space Science

Publication Date











ACT-America, atmospheric CH4, atmospheric CO2, data description, meteorological properties, trace gases

GeogFacWorks_Williams_AtmosCarbonData_SuppInfo_2021.pdf (1758 kB)
Atmospheric carbon and transport - Supporting Information

Included in

Geography Commons



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.