GGD650_1

Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001, Version 1

Version 1 eng; usa
  • Abstract
    This data set contains monthly values of the total exposed land area of seasonally frozen ground and annual values for intermittently frozen ground in the Northern Hemisphere. Seasonally frozen ground is defined as the near-surface soil that experiences freeze for more than 15 days per year, while intermittently frozen ground experiences fewer than 15 days of freeze per year. The values were calculated based upon the monthly mean air temperature from the 1901-2002, 0.5 deg. global land temperatures from the University of East Anglia Climate Research Unit (Mitchell and Jones, 2005) using the technique described by Zhang, et al. (2003). Two ASCII files are available. One file contains monthly values of seasonally frozen ground area in square kilometers for 1901-2001. The other file contains annual values of intermittently frozen ground area. Data are available via FTP.
  • Purpose
    Scientific Research

Data Identification Fields:

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    Processing Level

    NA

    Quality
    Collection Progress

    Complete

Related URLs
    Science Keywords
    • EARTH SCIENCE
    • Land Surface
    • Frozen Ground
    • Seasonally Frozen Ground
    • Freezing/Thawing Index
    • EARTH SCIENCE
    • Cryosphere
    • Frozen Ground
    • Seasonally Frozen Ground
Other Descriptive Keywords
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ISO Topic Categories
  • GEOSCIENTIFIC INFORMATION

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Platforms
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    Instruments

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN GEODETIC
Location Keywords
    • Geographic Region
    • Arctic

Data Centers

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  • National Snow and Ice Data Center
    ARCHIVER

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • National Snow and Ice Data Center
    DISTRIBUTOR

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • FGDC
    PROCESSOR

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    ORIGINATOR

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Data Contacts

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  • Tingjun
    Technical Contact
    Tingjun Zhang

    UCB449
    Boulder, Colorado 80309-0449

    • 1 303 492 6199
    • 1 303 492 2359
    • Email
  • T.
    Technical Contact
    T. Smith

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  • National Snow and Ice Data Center
    User Services
    National Snow and Ice Data Center

    Boulder, Colorado

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  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email

Collection Citations Fields:

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    Collection Citations
    • Northern Hemisphere Seasonal and Intermittent Frozen Ground Areas 1901-2001, Version 1
      1

      Published by: National Snow and Ice Data Center