A new Atmospheric Tomography Mission (ATom) dataset provides the number, surface, and volume concentrations and size distributions of dry aerosol particles measured by the Aerosol Microphysical Properties (AMP) instrument package. Five instruments--two nucleation-mode aerosol size spectrometers (NMASS), two ultra-high sensitivity aerosol spectrometers (UHSAS), and a laser aerosol spectrometer (LAS)--comprise the AMP package. Three types of data are included: calculated optical parameters such as the asymmetry parameter and extinction at multiple wavelengths of relevance to satellite, Aeronet, and lidar measurements; 2) the particle number concentrations of aerosol and cloud particles in selected size ranges at standard temperature and pressure, and 3) the complete dry particle size distribution in 66 size bins.
ATom is a NASA Earth Venture Suborbital-2 mission. It will study the impact of human-produced air pollution on greenhouse gases and on chemically reactive gases in the atmosphere. 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 to 12 km altitude. Flights will occur in each of 4 seasons over a 4-year period. See all ORNL DAAC data from ATom.
Data Citation: Brock, C.A., A. Kupc, C.J. Williamson, K. Froyd, F. Erdesz, D.M. Murphy, G.P. Schill, D.W. Gesler, R.J. Mclaughlin, M. Richardson, N.L. Wagner, and J.C. Wilson. 2019. ATom: L2 In Situ Measurements of Aerosol Microphysical Properties (AMP). ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1671
Data Center: ORNL DAAC