Entry_ID: ARCSS130
Entry_Title: A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment
Group: Data_Set_Citation
   Dataset_Creator: M. Sturm and C. Racine
   Dataset_Title: A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment
   Dataset_Release_Date: 2005-06-06
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/arcss130.html
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Matthew
   Last_Name: Sturm
   Email: msturm@crrel.usace.army.mil
   Phone: 1 907 353-5183 
   Fax: 1 907  353-5142 
   Group: Contact_Address
      Address: USA-CRREL-Alaska
      Address: P.O. Box 35170
      City: Ft. Wainwright
      Province_or_State: AK
      Postal_Code: 99703-0170
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Charles H.
   Last_Name: Racine
   Email: cracine@crrel41.crrel.usace.army.mil
   Phone: 1 603 646-4519 
   Fax: 1 603  646-4785 
   Group: Contact_Address
      Address: US Army CRREL
      Address: 72 Lyme Road
      City: Hanover
      Province_or_State: NH
      Postal_Code: 03755-1290
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Biosphere
   Term: Vegetation
   Variable_Level_1: Vegetation Cover
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
ISO_Topic_Category: Environment
Keyword: Alaska
Keyword: Alaskan North Slope
Keyword: Anaktuvuk River
Keyword: ARCSS130
Keyword: ARCSS Data Coordination Center
Keyword: Atigun Gorge
Keyword: Ayiyak River
Keyword: Canning River
Keyword: Chandler River
Keyword: Colville River
Keyword: Horseshoe/Castle
Keyword: Ivishak River
Keyword: Kokolik River
Keyword: Kugururok River
Keyword: Kuparuk River
Keyword: Nanushuk River
Keyword: Nimiuktuk River
Keyword: Northern Alaska
Keyword: NSIDC > National Snow and Ice Data Center
Keyword: Oolamnagavik River
Keyword: OPP 0119374
Keyword: Sag/Lupine confluence
Keyword: Sagwon
Keyword: SHEBA
Keyword: The Notch
Keyword: Upper Colville River
Keyword: Upper Killik River
Keyword: Upper Nigu River
Sensor_Name: CAMERAS
Source_Name: AIRCRAFT
Source_Name: HELICOPTER
Group: Temporal_Coverage
   Start_Date: 1948-01-01
   Stop_Date: 1951-12-31
End_Group
Group: Temporal_Coverage
   Start_Date: 1999-01-01
   Stop_Date: 2003-12-31
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: 68
   Northernmost_Latitude: 70
   Westernmost_Longitude: -165
   Easternmost_Longitude: -145
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: UNITED STATES OF AMERICA
   Location_Subregion2: ALASKA
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: ARCTIC
End_Group
Use_Constraints: The images should not be published without the consent of the investigators.
Data_Set_Language: English
Originating_Center: NSIDC_ARCSS
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: NSIDC_ARCSS > NSIDC Arctic System Science Data Coordination Center
   Data_Center_URL: http://nsidc.org/arcss/
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC ARCSS
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: DVD
   Distribution_Size: 11 GB
   Distribution_Format: TIFF
End_Group
Group: Reference

   Sturm, M., C. Racine, and K. Tape. 2001. Increasing shrub abundance in the 
   Arctic. Nature 411: 546-547.

End_Group
Group: Summary

   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. Approximate 
   coordinates are 68°N to 70°N and 145°W to 165°W.

   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 11 GB. The 
   photographs are distributed on a set of three DVDs.

   The images should not be published without the consent of the investigators.

End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2005-06-06
Last_DIF_Revision_Date: 2012-06-04
DIF_Revision_History: corrected distribution format