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    • ATom: In Situ Atmospheric Water Vapor from the Diode Laser Hygrometer, Version 2

    Metadata Updated: December 6, 2023

    This dataset provides the concentrations of water measured by the Diode Laser Hygrometer (DLH) flown on the NASA DC-8 during the ATom 1-4 campaigns from 2016 - 2018. The DLH measures the water vapor in the atmosphere by wavelength modulated differential absorption spectroscopy of an isolated rovibrational line. The measurements include water vapor mixing ratio in parts-per-million-by-volume (ppmv) and relative humidity in percent. Relative humidity, both with respect to liquid water and with respect to ice, are quantities derived from measurements of water vapor mixing ratio as well as ambient temperature and pressure.

    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

    A schematic of DLH electronic implementation. Source: Diskin et al., 2002

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2677094274-ORNL_CLOUD
    Data First Published 2022-01-03
    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 Diskin, G.S., and J.P. DiGangi. 2021. ATom: In Situ Atmospheric Water Vapor from the Diode Laser Hygrometer, Version 2. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1937
    Graphic Preview Description A schematic of DLH electronic implementation. Source: Diskin et al., 2002
    Graphic Preview File https://daac.ornl.gov/ATOM/guides/ATom_DLH_Instrument_Data_V2_Fig1.png
    Harvest Object Id ee0995fa-df71-4b47-8c9d-b2e0ab400127
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1937
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash d79311eccf0ec0e6e5f034990bf2390ac08822f1cb85e02d3620133ffa01ed81
    Source Schema Version 1.1
    Spatial
    Temporal 2016-07-29T00:00:00Z/2018-05-21T23:59:59Z

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