Entry_ID: GGD649
Entry_Title: Northern Hemisphere EASE-Grid Annual Freezing and Thawing  Indices, 1901 - 2002
Group: Data_Set_Citation
   Dataset_Creator: T. Zhang, O. W. Frauenfeld, James McCreight, Roger Barry
   Dataset_Title: Northern Hemisphere EASE-Grid Annual Freezing and Thawing  Indices, 1901 - 2002
   Dataset_Release_Date: 2005-11-22
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/ggd649.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Tingjun
   Middle_Name: Z
   Last_Name: Zhang
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2359 x
   Group: Contact_Address
      Address: University of Colorado
      Address: National Snow and Ice Data Center/World Data Center for Glaciology
      Address: UCB449
      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Oliver
   Middle_Name: W.
   Last_Name: Frauenfeld
   Group: Contact_Address
      Address: University of Colorado
      Address: National Snow and Ice Data Center/World Data Center for Glaciology
      Address: UCB 449
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: R.
   Middle_Name: G.
   Last_Name: Barry
   Group: Contact_Address
      Address: University of Colorado
      Address: National Snow and Ice Data Center/World Data Center for Glaciology
      Address: 449 UCB
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
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: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Temperature
   Variable_Level_1: Air Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Temperature
   Variable_Level_1: Degree Days
   Detailed_Variable: Freezing/Thawing Index
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Temperature
   Variable_Level_1: Surface Air Temperature
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
ISO_Topic_Category: Geoscientific Information
Keyword: Freezing Degree Days
Keyword: Freezing Index
Keyword: Thawing Degree-day
Keyword: Thawing Degree Days
Keyword: Thawing Index
Group: Temporal_Coverage
   Start_Date: 1901-01-01
   Stop_Date: 2002-12-31
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: 0
   Northernmost_Latitude: 90
   Westernmost_Longitude: -180
   Easternmost_Longitude: 180
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: NORTHERN HEMISPHERE
End_Group
Group: Data_Resolution
   Latitude_Resolution: 25 km
   Longitude_Resolution: 25 km
   Temporal_Resolution: 1 year
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

   Frauenfeld, O.W., T. Zhang, and J. L. McCreight. Submitted. Climatology and 
   variability of the 20th century Northern Hemisphere freezing/thawing index. 
   International Journal of Climatology.

   Mitchell TD, Jones PD. 2005. An improved method of constructing a database of 
   monthly climate observations and associated high-resolution grids. 
   International Journal of Climatology 25, 693–712.   Simmons A. J., P. D. 
   Jones, V da Costa Bechtold, A. C. M. Beljaars, P. W. Kållberg, S. Saarinen, S. 
   M. Uppala, P. Viterbo, and N. Wedi. 2004. Comparison of trends and variability 
   in CRU, ERA-40, and NCEP/NCAR analyses of monthly-mean surface air 
   temperature. ERA-40 Project Report Series No. 18, 38.

   Willmott C.J. and K. Matsura. 2001. Terrestrial air temperature and 
   precipitation: Monthly and annual time series (1950-1999). Newark, DE: Center 
   for Climatic Research, Department of Geography, University of Delaware, Newark.

End_Group
Group: Summary

   This data set contains annual freezing and thawing indices for each year from 
   1901 to 2002 on the 25 km resolution Equal-Area Scalable Earth Grid 
   (EASE-Grid). Annual freezing and thawing indices are defined as the cumulative 
   number of degree-days when air temperatures are below and above 0 degrees C. 
   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).

   Two ASCII files are available for each year for the freezing and thawing 
   indices, respectively. Each file is approximately 5.5 MB in size. In addition, 
   there is one 10.4 MB ASCII file defining the latitude and longitude 
   coordinates for each grid point. The data set is available in compressed form 
   via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/ease/index.html
   Description: All About EASE-Grid
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2005-11-22
Last_DIF_Revision_Date: 2013-03-14
DIF_Revision_History:  Fixed broken FTP link. An optional reg form was not chosen.