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    • Seasonal and annual dynamics of frozen ground, central highland of Iceland, Version 1

    Metadata Updated: September 18, 2025

    This dataset documents a nine-year study to investigate the seasonal and annual dynamics of frozen ground and explore the relationship with environmental factors. The presence/absence of frozen ground and active layer thickness were recorded three times over the growing season (4-7 July, 1-4 August, and 20-24 August) at 51 permanent points in different plant communities and on 12 palsas (Thorhallsdottir 1996, p. 237). Sample size is variable: 33 permanent measurement stations in 1983, 29 in 1984, 63 in 1985-1991. Active layer depth measurement sites averaged 51 over the span of the data set. Data include mean active layer depth (and standard error) in early July and early August (for palsas and with palsas excluded); monthly degree days above zero, precipitation, snow depth, and frost degree days (i.e., below zero.) Data are presented on the CAPS Version 1.0 CD-ROM, June 1998.

    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 April 11, 2025
    Metadata Updated Date September 18, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date September 18, 2025
    Publisher NSIDC
    Maintainer
    Identifier 10.7265/m78z-mn18
    Data Last Modified 2025-09-11
    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 a631f383-d328-4f51-ba16-1cd606dc99fb
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://nsidc.org/forms/GGD9_or.html?major_version=1
    Old Spatial "CARTESIAN",{"WestBoundingCoordinate":-18.667,"NorthBoundingCoordinate":64.5,"EastBoundingCoordinate":-18.667,"SouthBoundingCoordinate":64.5}
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 8ea9c1903715f936d5f27cee7e0df7eafb50efe3dbf31e9ce108f59e7017a9db
    Source Schema Version 1.1
    Spatial
    Temporal 1983-01-01/1983-01-01

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