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    • ATom: Column-Integrated Densities of Hydroxyl and Formaldehyde in Remote Troposphere

    Metadata Updated: December 6, 2023

    This dataset provides profile-integrated column densities of formaldehyde (HCHO), hydroxyl (OH), and OH production rates, diel tropospheric mean OH concentrations, and uncertainties that were derived from direct observation data from selected profiles of NASA Atmospheric Tomography (ATom) mission 1 and 2 flights for the period July 29, 2016 to February 21, 2017. These calculated products were combined with coincident HCHO column retrievals from the Ozone Monitoring Instrument (OMI) to scale and extend the profile results to a global gridded (0.5 deg latitude x 0.625 deg longitude) product. In addition to OMI formaldehyde column data, model output products from the Global Modeling Initiative (GMI) including average tropopause height, scaling factor, column air mass, and column-average formaldehyde photolysis frequency are provided. The GMI model output products were used in calculations and are included for user convenience.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Black lines show full flight tracks for ATom missions 1 (a) and 2 (b). Circles mark the locations of the 139 selected profiles sampling the remote troposphere. Circle color indicates HCHO column densities integrated over each ATom profile. Data are overlain on global gridded OMI HCHO column densities averaged over each mission. From Wolfe et al. (2019).

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2675872137-ORNL_CLOUD
    Data First Published 2019-02-19
    Language en-US
    Data Last Modified 2023-06-12
    Category ATom, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Wolfe, G.M., J.M. Nicely, J.M. St.Clair, T.F. Hanisco, J. Liao, L. Oman, W.H. Brune, D.O. Miller, A.B. Thames, G.G. Abad, T.B. Ryerson, J. Peischl, K. Mccain, C. Sweeney, P. Wennberg, M.J. Kim, J.D. Crounse, S.R. Hall, K. Ullmann, G.S. Diskin, T.P. Bui, C.S. Chang, and J.M. Dean-Day. 2019. ATom: Column-Integrated Densities of Hydroxyl and Formaldehyde in Remote Troposphere. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1669
    Graphic Preview Description Black lines show full flight tracks for ATom missions 1 (a) and 2 (b). Circles mark the locations of the 139 selected profiles sampling the remote troposphere. Circle color indicates HCHO column densities integrated over each ATom profile. Data are overlain on global gridded OMI HCHO column densities averaged over each mission. From Wolfe et al. (2019).
    Graphic Preview File https://daac.ornl.gov/ATOM/guides/ATom_Mapping_OH_Troposphere_Fig1.jpg
    Harvest Object Id 5cc59457-33c7-4619-8f2f-28ab42c9bab7
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1669
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 179.99 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash a294cf2e2901462cf19b3da6a623fde38301b9d5c6ba9c93121b433ab08768f1
    Source Schema Version 1.1
    Spatial
    Temporal 2016-07-29T00:00:00Z/2017-02-21T23:59:59Z

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