Entry_ID: NSIDC-0046
Entry_Title: Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent
Group: Data_Set_Citation
   Dataset_Creator: Brodzik, M. and R. Armstrong. 
   Dataset_Title: Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent
   Dataset_Release_Date: 2013-01-31
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
   Version: 4
   Online_Resource: http://nsidc.org/data/nsidc-0046.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: Richard
   Last_Name: Armstrong
   Email: rlax@nsidc.org
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: National Snow and Ice Data Center
      Address: CIRES 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Richard
   Last_Name: Armstrong
   Email: rlax@nsidc.org
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: National Snow and Ice Data Center
      Address: CIRES 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Mary J.
   Last_Name: Brodzik
   Email: brodzik@nsidc.org
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      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
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Ice Extent
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: Oceans
   Term: Sea Ice
   Variable_Level_1: Ice Extent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
ISO_Topic_Category: Oceans
Keyword: Arctic
Keyword: DAAC
Keyword: EASE-Grid 2.0
Keyword: EOSDIS
Keyword: Global
Keyword: Global Change
Keyword: Gridded Data
Keyword: Ice
Keyword: NASA
Keyword: Northern Hemisphere
Keyword: NSIDC
Keyword: Remote Sensing
Keyword: Sea Ice
Keyword: Sea Ice Extent
Keyword: SMMR
Keyword: Snow
Keyword: Snow Cover
Keyword: Snow Extent
Keyword: SSM/I
Sensor_Name: AVHRR > Advanced Very High Resolution Radiometer
Sensor_Name: SMMR > Scanning Multichannel Microwave Radiometer
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Sensor_Name: SSMIS > Special Sensor Microwave Imager/Sounder
Sensor_Name: VAS > VISSR Atmospheric Sounder
Source_Name: DMSP > Defense Meteorological Satellite Program
Source_Name: DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11
Source_Name: DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
Source_Name: DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8
Source_Name: DMSP 5D-3/F17 > Defense Meteorological Satellite Program-F17
Source_Name: GOES > NOAA Geostationary Operational Environmental Satellites
Source_Name: GOES-7 > Geostationary Operational Environmental Satellite 7
Source_Name: NIMBUS-7
Source_Name: NOAA POES > NOAA Polar Orbiting Environmental Satellites
Group: Temporal_Coverage
   Start_Date: 1978-10-23
   Stop_Date: 2011-12-31
End_Group
Group: Temporal_Coverage
   Start_Date: 1966-10-03
   Stop_Date: 2011-12-31
End_Group
Data_Set_Progress: complete
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: 7 days
End_Group
Project: NOAA/NASA PATHFINDER > NOAA/NASA Pathfinder Program
Group: Quality

   NSIDC observed and manually inspected selected files in this data set, and 
   performed spot checks against the original hand-drawn NOAA/NESDIS snow charts 
   and the original sea ice data. Please see the Quality Control Summary for more 
   information about quality control procedures at NSIDC.

End_Group
Data_Set_Language: English
Originating_Center: NSIDC_DAAC
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   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 > 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: NOAA > National Oceanic and Atmospheric Administration
   Data_Center_URL: http://nsidc.org/noaa/
   Group: Personnel
      Role: Data Center Contact
      First_Name: NOAA
      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_Size: 508 KB
   Distribution_Format: Binary
End_Group
Group: Reference

   Brodzik, M. J., B. Billingsley, T. Haran, B. Raup, M. H. Savoie. 2012. 
   EASE-Grid 2.0: Incremental but Significant Improvements for Earth–Gridded 
   Data Sets. ISPRS International Journal of Geo–Information 1(1):32-45. 
   doi:10.3390/ijgi1010032.

   Brodzik, M. J. 2012. EASE-Grid 2.0 Land Cover Data Resampled from Boston 
   University Version of Global 1 km Land Cover from MODIS 2001, Version 4. 
   Boulder, Colorado USA: National Snow and Ice Data Center.

   Brodzik, M. J. 1997. EASE-Grid: A Versatile Set of Equal-Area Projections and 
   Grids. Boulder, Colorado USA: National Snow and Ice Data Center.

   Brown R. D., and D. A. Robinson. 2011. Northern Hemisphere Spring Snow Cover 
   Variability and Change over 1992–2010 Including an Assessment of Uncertainty. 
   The Cryosphere 5:219–229, 
   www.the-cryosphere.net/5/219/2011/doi:10.5194/tc-5-219-2011.

   Cavalieri, D. J., J. Crawford, M. Drinkwater, W. J. Emery, D. T. Eppler, L. D. 
   Farmer, M. Goodberlet, R. Jentz, A. Milman, C. Morris, R. Onstott, A. 
   Schweiger, R. Shuchman, K. Steffen, C. T. Swift, C. Wackerman, and R. L. 
   Weaver. 1992. NASA Sea Ice Validation Program for the DMSP SSM/I: Final 
   Report. NASA Technical Memorandum 104559. 126 pp.

   Cavalieri, D. J., P. Gloersen, and W. J. Campbell. 1984. Determination of Sea 
   Ice Parameters with the NIMBUS–7 SMMR. Journal of Geophysical Research 
   89(D4):5355-5369.

   Dewey, K. F. and R. Heim, Jr. 1981. Satellite Observations of Variations in 
   Northern Hemisphere Seasonal Snow Cover. NOAA Technical Report NESS 87. 83 pp.

   Dewey, K. F. and R. Heim Jr. 1982. New Data Base: A Digital Archive of 
   Northern Hemisphere Snow Cover. Presented at Western Snow Conference, April 
   19–23. Reno, NV, 9 pp.

   Gloersen, P., W. J. Campbell, D. J. Cavalieri, J. C. Comiso, C. L. Parkinson, 
   and H. J. Zwally. 1992. Arctic and Antarctic Sea Ice, 1978 - 1987: Satellite 
   Passive Microwave Observations and Analysis. NASA SP–511.

   Helfrich, S. R., D. McNamara, B. H. Ramsay, T. Baldwin, and T. Kasheta. 2007. 
   Enhancements to, and Forthcoming Developments in the Interactive Multisensor 
   Snow and Ice Mapping System (IMS). Hydrological Processes 21(12): 1576–1586. 
   doi:10.1002/hyp.6720.

   Johannessen, O. M., M. W. Miles, E. Bjørgo. 1996. Global Sea Ice Monitoring 
   from Microwave Satellites. In IGARSS '96. 1996 International Geoscience and 
   Remote Sensing Symposium. Remote Sensing for a Sustainable Future, ed. T. I. 
   Stein, Vol. II: 932–934. Piscataway, NJ: Institute of Electrical and 
   Electronics Engineers, Inc.

   Knowles, K. 2004. EASE–Grid Land Cover Data Resampled from Boston University 
   Version of Global 1 km Land Cover from MODIS 2001, Version 4. Boulder, 
   Colorado USA: National Snow and Ice Data Center.

   Knowles, K. 1993. Points, Pixels, Grids, and Cells: A Mapping and Gridding 
   Primer. Boulder, Colorado USA: National Snow and Ice Data Center.

   NOAA/NESDIS/OSDPD/SSD. 2004. IMS Daily Northern Hemisphere Snow and Ice 
   Analysis at 4 km and 24 km Resolution. Boulder, Colorado USA: National Snow 
   and Ice Data Center.

   Ramsay, B. H. 1998. The Interactive Multisensor Snow and Ice Mapping System. 
   Hydrological Processes 12:1537-1546.

   Robinson, D. et al. 2012. NOAA/NCDC Climate Data Record (CDR) of Northern 
   Hemisphere (NH) Snow Cover Extent (SCE). New Jersey, USA: Rutgers University 
   Global Snow Lab.

   Robinson, D. A., A. Bamzai, and B. Ramsay. 2001. Evaluating Northern 
   Hemisphere Snow Cover During the Satellite Era: Variations in Extent and 
   Associations with Temperature. Proceedings of the 12th Symposium on Global 
   Change and Climate Variations. Albuquerque, New Mexico USA, American 
   Meteorological Society, 36–39.

   Robinson, D. A. 2000. Weekly Northern Hemisphere Snow Maps: 1966–1999. 12th 
   Conference on Applied Climatology, Asheville, NC, American Meteorological 
   Society, 12–15.

   Robinson, D. A. and A. Frei. 2000. Seasonal Variability of Northern Hemisphere 
   Snow Extent Using Visible Satellite Data. Professional Geographer 51: 307–314.

   Robinson, D. A., J. D. Tarpley and B. Ramsay. 1999. Transition from NOAA 
   Weekly to Daily Hemispheric Snow Charts. Proceedings of the 10th Symposium on 
   Global Change, Dallas, TX, American Meteorological Society, 487–490.

   Robinson, D. A., K. F. Dewey, and R. R. Heim, Jr. 1993. Global Snow Cover 
   Monitoring: an Update. Bulletin of the American Meteorological Society 
   74:1689–1696.

   Swift, C. T. and D. J. Cavalieri. 1985. Passive Microwave Remote Sensing for 
   Sea Ice Research. EOS 66(49):1210–1212.

End_Group
Group: Summary

   The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent 
   Version 4 product combine snow cover and sea ice extent at weekly intervals 
   from 23 October 1978 through 31 December 2011, and snow cover alone from 03 
   October 1966 through 31 December 2011. Snow cover extent for this data set is 
   based on the NOAA/NCDC Climate Data Record (CDR) of Northern Hemisphere (NH) 
   Snow Cover Extent (SCE) by D. Robinson (2012) and regridded to the EASE-Grid. 
   The NOAA/NCDC CDR of Northern Hemisphere Snow Cover Extent data were derived 
   from the manual interpretation of AVHRR, GOES, and other visible-band 
   satellite data (Helfrich et al. 2007). Sea ice extent is regridded to 
   EASE-Grid from Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS 
   Passive Microwave Data. Designed to facilitate study of Northern Hemisphere 
   seasonal fluctuations of snow cover and sea ice extent, the data set also 
   includes monthly climatologies describing average extent, probability of 
   occurrence, and variance. Data are provided in flat, unsigned binary files and 
   are available via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/seaice/
   Description: Sea Ice Data at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/atlas/
   Description: Atlas of the Cryosphere
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/ease/
   Description: EASE-Grid Data
End_Group
IDN_Node: USA/NASA
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2013-01-31
Last_DIF_Revision_Date: 2013-10-02
Group: DIF_Revision_History

   Removed Access Map Viewer link to Atlas of the Cryosphere since this is a tool 
   that should be listed in the guide doc and not in the access data links at the 
   top of the catalog page.

End_Group