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    • ACT-America: L1 Raw, Uncalibrated In-Situ CO2, CO, and CH4 Mole Fractions from Towers

    Metadata Updated: December 6, 2023

    This dataset provides Level 1 (L1) in situ atmospheric carbon dioxide (CO2), carbon monoxide (CO), and methane (CH4) concentrations as measured on a network of instrumented communications towers across the central and eastern USA operated by the Atmospheric Carbon and Transport-America (ACT-America) project. There were 11 towers instrumented with cavity ring-down spectrometers (CRDS; Picarro Inc.) with measurements beginning in January 2015 and continuing to October 2019. The measurement period varied by tower site. The Picarro analyzers continuously measured total CH4, isotopic ratio of CH4, CO2, CO, and other greenhouse gas concentrations. Not all species were measured at all sites. Complete tower location, elevation, instrument height, and date/time information are also provided. Determination of greenhouse gas fluxes and uncertainty bounds is essential for the evaluation of the effectiveness of mitigation strategies. These L1 data are raw instrument outputs from the Picarro instruments. A Level 2 (L2) product derived from this L1 data is available and generally would be the preferred data for most use cases.

    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 June 27, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    The communication tower at the Wessington, South Dakota site. This site was instrumented from January of 2017 to September of 2019.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 27, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2706327711-ORNL_CLOUD
    Data First Published 2020-10-30
    Language en-US
    Data Last Modified 2023-06-12
    Category ACT-America, 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 Miles, N.L., S.J. Richardson, D.K. Martins, K.J. Davis, and B.J. Haupt. 2020. ACT-America: L1 Raw, Uncalibrated In-Situ CO2, CO, and CH4 Mole Fractions from Towers. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1798
    Graphic Preview Description The communication tower at the Wessington, South Dakota site. This site was instrumented from January of 2017 to September of 2019.
    Graphic Preview File https://daac.ornl.gov/ACTAMERICA/guides/Insitu_Tower_Greenhouse_Gas_Fig1.jpg
    Harvest Object Id dbb5d6fa-d912-43af-a431-2b12b21d7670
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1798
    Metadata Type geospatial
    Old Spatial -98.59 30.2 -76.42 44.05
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 35e4f48f13f7a4dded23a338a759c2151001f217209bb2cc51ad0fae4b10dc3f
    Source Schema Version 1.1
    Spatial
    Temporal 2015-01-01T00:00:00Z/2019-12-31T23:59:59Z

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