A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment

In this study, the locations of 193 old aerial photographs of northern Alaskan landscapes were rephotographed and assessed for changes in vegetation. The original photographs were taken over northern Alaska between 1948 and 1951, and the new photographs were taken between 1999 and 2003. The region covered by the original and repeat photographs stretches from the southern extent of the Brooks Range in the south to the Coastal Plain in the north, and from the Chukchi Sea in the west to the Canning River in the east. The original photographs were taken by the U.S. military as part of geologic reconnaissance and exploration, and the method used to acquire them was to fly both sides of a river valley while photographing the river and the facing valley slopes. Of the several thousand original photographs, only a fraction were repeated for the purpose of assessing vegetation change. Repeat photographs were selected for geographic coverage and to produce the greatest likelihood of detecting vegetation change. The original and repeat photographs were then scanned and stored in TIFF format. Individual image file sizes range from 5 to 60 MB each, and the total file size for the data set is approximately 11 GB. The images should not be published without the consent of the investigators.

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Temporal Range

  • Begin:  1948-01-01T01:01:00Z
    End:  2003-12-31T23:59:59Z


Resource Type dataset
Temporal Range Begin 1948-01-01T01:01:00Z
Temporal Range End 2003-12-31T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 70.00000
Bounding Box South Lat 68.00000
Bounding Box West Long -165.00000
Bounding Box East Long -145.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links

Documentation #1 : GPS_photo_locations.xls

Documentation #2 : map.JPG

Documentation #3 : NOTES.txt

Additional Information N/A
Resource Format TAR: Unix Tape ARchive (TAR) Format File (application/x-tar)
Standardized Resource Format Archive
Asset Size 11260 MB
Legal Constraints


Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email datahelp@eol.ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author Matthew Sturm
Charles H. Racine
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2011-05-17T09:08:45
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier 106.ARCSS130
Resource Version 1.0
Topic Category biota
Progress completed
Metadata Date 2024-02-07T22:49:59Z
Metadata Record Identifier edu.ucar.eol::106.ARCSS130
Metadata Language eng; USA
Suggested Citation Matthew Sturm, Charles H. Racine. (2011). A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://data.eol.ucar.edu//dataset/106.ARCSS130. Accessed 16 April 2024.

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