Entry_ID: GGD245
Entry_Title: Response of Tundra Ecosystems to Altered Snow Regimes, Toolik Lake, Alaska, and Niwot Ridge, Colorado
Group: Data_Set_Citation
   Dataset_Creator: Donald (Skip) Walker, Marilyn Walker, Jeff Welker, Tim Seastedt, and Bill Krantz
   Dataset_Title: Response of Tundra Ecosystems to Altered Snow Regimes, Toolik Lake, Alaska, and Niwot Ridge, Colorado
   Dataset_Release_Date: 2003-06-17
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/ggd245.html
End_Group
Group: Personnel
   Role: Data Author
   First_Name: Marilyn
   Last_Name: Walker
   Email: ffmdw@uaf.edu
   Phone: 1 907 474-2424 
   Fax: 1 907  474-6251 
   Group: Contact_Address
      Address: University of Alaska Fairbanks
      Address: Boreal Ecology Cooperative Research Unit
      Address: School of Agriculture and Land Resources Management
      Address: P.O. Box 756780
      City: Fairbanks
      Province_or_State: AK
      Postal_Code: 99775-7000
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Donald (Skip)
   Middle_Name: A.
   Last_Name: Walker
   Email: ffdaw@uaf.edu
   Phone: 1 907 474-2460 
   Group: Contact_Address
      Address: University of Alaska at Fairbanks
      Address: Institute of Arctic Biology
      Address: Institute of Arctic Biology
      Address: University of Alaska Fairbanks
      City: Fairbanks
      Province_or_State: AK
      Postal_Code: 99775-6780
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Jeff
   Last_Name: Welker
   Group: Contact_Address
      Address: University of Colorado
      Address: INSTAAR
      Address: Campus Box 450
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0450
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Tim
   Last_Name: Seastedt
   Group: Contact_Address
      Address: University of Colorado
      Address: INSTAAR
      Address: Campus Box 450
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0450
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Bill
   Last_Name: Krantz
   Group: Contact_Address
      Address: University of Colorado
      Address: INSTAAR
      Address: Campus Box 450
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0450
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Temperature
   Variable_Level_1: Surface Air Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Precipitation
   Variable_Level_1: Snow
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Frozen Ground
   Variable_Level_1: Active Layer
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Frozen Ground
   Variable_Level_1: Soil Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Depth
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Frozen Ground
   Variable_Level_1: Active Layer
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Frozen Ground
   Variable_Level_1: Soil Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Soils
   Variable_Level_1: Soil Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Depth
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Temperature
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Active Layer
Keyword: Chemistry
Keyword: Snow
Keyword: Soil Properties
Keyword: Thermal Properties
Keyword: Vegetation
Source_Name: GROUND-BASED OBSERVATIONS
Source_Name: GROUND STATIONS
Group: Spatial_Coverage
   Southernmost_Latitude: 40
   Northernmost_Latitude: 68
   Westernmost_Longitude: -148
   Easternmost_Longitude: -105
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Detailed_Location: ALASKA, COLORADO
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: UNITED STATES OF AMERICA
   Detailed_Location: ALASKA, COLORADO
End_Group
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: FGDC > Frozen Ground Data Center
   Data_Center_URL: http://nsidc.org/fgdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: FGDC
      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
End_Group
Group: Summary

   This study investigated the effects of field manipulations  of winter 
   precipitation and summer temperature on species performance, community 
   structure, and ecosystem C and N dynamics. Parameters include ground 
   temperatures at the surface and 15 cm along a gradient of snow  depths, snow 
   depth, soil temperatures at 10 cm intervals at  several sites in drifts and 
   unimpacted vegetation sites, and active  layer thickness. Temperature profiles 
   were monitored continuously. Snow  depths were monitored in a grid behind snow 
   fences and in a 1 x 1 km grid surrounding the fence sites.  Active layer was 
   monitored at the end of the season. These data are part of the International 
   Tundra  Experiment (ITEX) network.

End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2003-06-17
Last_DIF_Revision_Date: 2005-01-07
DIF_Revision_History: