Entry_ID: GGD6
Entry_Title: Ground temperatures in ice-cemented ground at Linnaeus Terrace, Dry Valleys, Antarctica
Group: Data_Set_Citation
   Dataset_Creator: McKay, C. P.
   Dataset_Title: Ground temperatures in ice-cemented ground at Linnaeus Terrace, Dry Valleys, Antarctica
   Dataset_Release_Date: 1998-01-01
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/ggd6.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Christopher 
   Middle_Name: P.
   Last_Name: McKay
   Email: chris.mckay@nasa.gov
   Phone: 1 650 604-6864 x
   Fax: 1 650  604-6779 x
   Group: Contact_Address
      Address: NASA Ames Research Center
      Address: Space Science Division
      Address: Mail Stop 245-3
      City: Moffett Field
      Province_or_State: CA
      Postal_Code: 94035
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Frozen Ground
   Variable_Level_1: Permafrost
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: Land Surface
   Term: Frozen Ground
   Variable_Level_1: Permafrost
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Frozen Ground
   Variable_Level_1: Soil Temperature
End_Group
Keyword: Meteorology
Keyword: Permafrost Temperature
Keyword: Soil Temperature
Group: Temporal_Coverage
   Start_Date: 1994-01-01
   Stop_Date: 1994-12-31
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: -77.6
   Northernmost_Latitude: -77.6
   Westernmost_Longitude: 161.083
   Easternmost_Longitude: 161.083
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
   Detailed_Location: LINNAEUS TERRACE, DRY VALLEYS, MCMURDO AREA, ANTARCTICA
End_Group
Data_Set_Language: English
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: 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: Distribution
   Distribution_Media: FTP
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Reference

   Mckay, C.P., Mellon, M.T., Friedmann, E.I. 1998. Soil  temperatures and 
   stability of ice-cemented ground in th McMurdo  Dry Valleys, Antarctica. 
   Antarctic Science, 10(1), p. 31-38.

End_Group
Group: Summary

   Soil temperatures were measured with Campbell 107 soil thermistors. 
   Thermistors were placed at 0, 17, 23 (just above the ice-cemented permafrost) 
   and 40 cm depth. To emplace the sensors, first a soil pit was dug to the level 
   of ice-cemented permafrost. Then a hammer drill was used to make a narrow, 15 
   cm deep hole into the ice-cemented ground. The thermistor was placed into the 
   drill hole. This procedure caused minimal disturbance to the ice-cemented 
   ground. Air temperature and humidity were measured with a Campbell 207 air 
   probe. The temperature on the surface of an outcrop of Beacon sandstone was 
   measured with a T-type thermocouple. Sunlight was measured with a LiCor 200 
   pyranometer. The sensors were deployed during Jan 1993 but (due to equipment 
   failure) data storage began only on 6 Jan 1994 and was continued until 16 Jan 
   1995. All temperature sensors were removed after the data collection interval 
   and calibrated in the laboratory. Calibrations were applied using the 
   Steinhart and Hart (1968) representations for the temperature dependence of 
   the thermistor resistance. This was necessary since the instrumental 
   calibration for the 107 thermistor provided by Campbell did not extend below 
   -40C. After correction, the error in the temperature measurement is estimated 
   to be less than 0.2 C and error in the humidity measurement was Campbell 207 
   RH sensor has high errors for relative humidity values below 15% --- tending 
   to systematically overestimate values by more than 10% humidity. The error in 
   the averaged light measurement is less than 10 W/m2.  All sensors were sampled 
   once every 10 minutes and averages of three measurements were written to final 
   memory every 30 minutes corresponding to 48 recordings each day.   

   Data are stored in columns of ASCII data; entries are  1. Digital day of year 
   in 1994   2. Air temperature  3. Air relative humidity  4. Sunlight, W/m2  5. 
   Soil surface temperature  4. Sunlight, W/m2  5. Soil surface temperature  6. 
   Temperature at 17 cm depth  7. Temperature at 23 cm depth  8. Temperature at 
   40 cm depth  9. Temperature on surface of rock 

   Data are presented on the CAPS Version 1.0 CD-ROM, June 1998.

End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 1998-01-01
Last_DIF_Revision_Date: 2012-08-24
DIF_Revision_History: added creator & publisher info