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    • OMG Airborne eXpendable Conductivity Temperature Depth (AXCTD) Profiles

    Metadata Updated: April 9, 2026

    This dataset contains in situ profile measurements from Airborne eXpendable Conductivity Temperature Depth (AXCTD) probes. It provides salinity, density, temperature and sound velocity as a function of depth in the water column. The AXCTDs were jettisoned from a plane to collect temperature and salinity readings around Greenland, where a ship would have had difficulties maneuvering. After landing in the water, the AXCTDs drop a weighted sensor from the surface that falls at a well-calibrated rate, measuring water temperature and conductivity as it falls. An equation is used to determine the depth of the measurements as the probe falls, and another equation is used to convert temperature, depth and conductivity into salinity. These probes provided measurements of the ocean's physical characteristics around Greenland, where a ship would have had difficulties maneuvering. The AXCTDs are part of the Oceans Melting Greenland (OMG) mission. The AXCTDs were deployed in the fall from 2016 through 2021, covering the entire continental shelf surrounding Greenland as part of a once-per-year survey. The goal of the mission is to find out what contributions the ocean has on Greenland's melting glaciers.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date June 18, 2025
    Metadata Updated Date April 9, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 18, 2025
    Metadata Updated Date April 9, 2026
    Publisher NASA/JPL/OMG;NASA/JPL/PODAAC
    Maintainer
    Identifier 10.5067/OMGEV-AXCT1
    Data Last Modified 2026-04-06
    Category Earth Science
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 0b682933-b848-4aac-921b-5224d43a47bb
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    License https://www.usa.gov/government-works
    Old Spatial "CARTESIAN",{"WestBoundingCoordinate":73.6,"SouthBoundingCoordinate":59.1,"EastBoundingCoordinate":180,"NorthBoundingCoordinate":83.6},{"WestBoundingCoordinate":-180,"SouthBoundingCoordinate":59.1,"EastBoundingCoordinate":-6.9,"NorthBoundingCoordinate":83.6}
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 2ef83724b545d5bd636aaa1ec7d19bc2706ecdd6ddd642b4e29429b8bfd277de
    Source Schema Version 1.1
    Spatial
    Temporal 2016-09-13/2021-12-31

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