The data tables in this file were used to generate the figures in the manuscript, "Summertime organic carbon absorption and sources at a southeastern U.S. location - dominance of secondary organic aerosol". Light-absorbing organic carbon, i.e. brown carbon, has been intensively investigated in atmospheres impacted by biomass burning impacted atmospheres. However, other brown carbon sources have been rarely studied in ambient aerosols. This data set includes forty-five PM2.5 filter samples that were collected in Research Triangle Park (RTP), NC, USA from June 1st to July 15th, 2013. The bulk carbonaceous components, including organic carbon, elemental carbon, water soluble organic carbon, and an array of organic molecular markers were measured; an ultraviolet (UV)/visible (Vis) spectrometer was used to measure the light absorption of methanol and water extractable organic carbon. A complete description of how the data was acquired and and analyzed is provided in the manuscript. A description of each parameter presented is provided in the file in the Data Dictionary. This dataset is associated with the following publication: Xie, M., X. Chen, A. Holder, M. Hays, M. Lewandowski, J. Offenberg, T. Kleindienst, and M. Jaoui. Summertime organic carbon absorption and sources at a southeastern U.S. location – dominance of secondary organic aerosol. ENVIRONMENTAL POLLUTION. Elsevier Science Ltd, New York, NY, USA, 244: 38-46, (2018).

This dataset provides information on greenhouse gases and human-produced air pollution, including atmospheric concentrations of carbon dioxide (CO2), methane (CH4), tropospheric ozone (O3), and black carbon (BC) aerosols, collected during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. This dataset includes merged data from all instruments plus additional data such as numbered profiles and distance flown. Merged data have been created for seven different sampling intervals. In the case of data obtained over longer time intervals (e.g. flask data), the merge files provide (weighted) averages to match the sampling intervals. ATom deploys an extensive gas and aerosol payload on the NASA DC-8 aircraft for a systematic, global-scale sampling of the atmosphere, profiling continuously from 0.2 to 12 km altitude. Flights occurred in each of 4 seasons from 2016 to 2018. Flights originate from the Armstrong Flight Research Center in Palmdale, California, fly north to the western Arctic, south to the South Pacific, east to the Atlantic, north to Greenland, and return to California across central North America. ATom establishes a single, contiguous, global-scale dataset. 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. Profiles of the reactive gases will also provide critical information for the validation of satellite data, particularly in remote areas where in situ data is lacking. Complete aircraft flight information including, but not limited to, latitude, longitude, and altitude are also provided. This data release provides results from all instruments on all four ATom flight campaigns.

This data was used to generate the figures and perform the analysis in the aforementioned manuscript. Citation information for this dataset can be found in Data.gov's References section.

This is the data used to generate the figures published in the journal article titled, "Light Absorption of Secondary Organic Aerosol: Composition and Contribution of Nitro-aromatic Compounds". This dataset is associated with the following publication: Xie, M., X. Chen, M. Hays, M. Lewandowski, J. Offenberg, T. Kleindienst, and A. Holder. Light absorption of secondary organic aerosol: Composition and contribution of nitro-aromatic compounds. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 51(20): 11607-11616, (2017).

This dataset is a compilation of optical properties of the organic fraction of particulate matter emitted from prescribed burning and from gasoline vehicles. This dataset is associated with the following publication: Xie, M., M. Hays, and A. Holder. Light absorbing organic carbon from prescribed and laboratory biomass burning and gasoline vehicle emissions. Scientific Reports. Nature Publishing Group, London, UK, online, (2017).

Data includes links to CMAQv5.4 code and a data archive with data used in figure generation. This dataset is associated with the following publication: Seltzer, K., V. Rao, H. Pye, B. Murphy, B. Place, P. Khare, D. Gentner, C. Allen, D. Cooley, R. Mason, and M. Houyoux. Anthropogenic Secondary Organic Aerosol and Ozone Production from Asphalt-Related Emissions. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 3(8): 1221-1230, (2023).

Data and CMAQ code associated with manuscript, "Updated in-cloud secondary aerosol production in the Northern Hemisphere predicted by the Community Multiscale Air Quality modeling system ". This dataset is associated with the following publication: Fahey, K., N. Sareen, A.M. Carlton, and B. Hutzell. Updated in-cloud secondary aerosol production in the Northern Hemisphere predicted by the Community Multiscale Air Quality modeling system. ACS Earth and Space Chemistry. American Chemical Society, Washington, DC, USA, 9(5): 1043–1059, (2025).