Entry_ID: G02156
Entry_Title: IMS Daily Northern Hemisphere Snow and Ice Analysis at 4 km and 24 km Resolution
Group: Data_Set_Citation
   Dataset_Creator: National Ice Center. 
   Dataset_Title: IMS Daily Northern Hemisphere Snow and Ice Analysis at 4 km and 24 km Resolution
   Dataset_Release_Date: 2008-01-01updated daily
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/g02156.html
   Dataset DOI: http://dx.doi.org/10.7265/N52R3PMC
End_Group
Group: Personnel
   Role: Investigator
   Last_Name: Unknown
   Group: Contact_Address
      Address: NOAA/NESDI
   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: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Concentration
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/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: Sea Ice Concentration
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/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: IMS
Keyword: Interactive Multisensor Snow and Ice Mapping System
Keyword: NOAA
Keyword: NOAA SSD snow products
Keyword: Northern Hemisphere
Keyword: Numerical Weather Prediction
Sensor_Name: AVHRR > Advanced Very High Resolution Radiometer
Sensor_Name: GOES I-M IMAGER
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Source_Name: DMSP > Defense Meteorological Satellite Program
Source_Name: GEOSTATIONARY SATELLITES
Source_Name: NOAA POES > NOAA Polar Orbiting Environmental Satellites
Source_Name: SATELLITES
Group: Temporal_Coverage
   Start_Date: 1997-02-01
End_Group
Data_Set_Progress: in work
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
   Temporal_Resolution: 1 day
End_Group
Group: Quality

   The quality of the snow and ice cover charts will depend on the availability 
   of clear sky imagery, the georegistration of that imagery, the quality of 
   other input data sources, and the experience of the analyst. Regions covered 
   by cloud during the 24-hour analysis period are generally mapped as 
   persistence, taking lower resolution passive microwave data and surface 
   observations into account where possible. Sub-grid scale features may not be 
   detected.

End_Group
Data_Set_Language: English
Originating_Center: NOAA
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 @ NSIDC > 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_Format: GIF
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 20 - 60 KB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 36913 KB
   Distribution_Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)
End_Group
Group: Reference

   Armstrong, R.L. and M.J. Brodzik. 2002. Northern Hemisphere EASE-Grid Weekly 
   Snow Cover and Sea Ice Extent Version 2. Boulder, CO, USA: National Snow and 
   Ice Data Center. CD-ROM.

   National Operational Hydrologic Remote Sensing Center. 2004. SNODAS Data 
   Products at NSIDC. Boulder, CO: National Snow and Ice Data Center. Digital 
   media.

   Ramsey, B. H., 1995. An Overview of NOAA/NESDISÂ’s Interactive Multisensor Snow 
   and Ice Mapping System. Proceedings of 1995 First Moderate Resolution Imaging 
   Spectrometer (MODIS) Workshop, Greenbelt, MD, National Aeronautics and Space 
   Administration Conference Publication 3318: 23-27.

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

   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.

End_Group
Group: Summary

   The National Environmental Satellite, Data, and Information Service (NESDIS), 
   part of the National Oceanic and Atmospheric Administration (NOAA), has an 
   extensive history of monitoring snow and ice coverage. Accurate monitoring of 
   global snow and ice cover is a key component in the study of climate and 
   global change as well as daily weather forecasting. By inspecting 
   environmental satellite imagery, analysts from the Satellite Analysis Branch 
   (SAB) at the Office of Satellite Data Processing and Distribution (OSDPD), 
   Satellite Services Division (SSD), created a Northern Hemisphere snow and ice 
   map from November 1966 until the National Ice Center (NIC) took over 
   production in 2008. Initially, the product was produced with a nominal spatial 
   resolution of 190 km and a temporal resolution of seven days. In 1997, the 
   Interactive Multisensor Snow and Ice Mapping System (IMS) became operational, 
   giving the satellite analysts improved access to imagery and drawing tools. 
   Since the inception of IMS, the charts have been produced daily at a nominal 
   resolution of 24 km (1024 x 1024 grid). Beginning in February 2004, further 
   improvements in computer speed and imagery resolution allowed for the 
   production of a higher resolution daily product with a nominal resolution of 4 
   km (6144 x 6144 grid). NSIDC archives and distributes the 24-km and the 4-km 
   IMS product in ASCII text format from February 1997 to present and February 
   2004 to present, respectively. NSIDC also distributes browse images in GIF 
   format and latitude and longitude grids for these products. In June 2006, 
   NSIDC started distributing 4-km GeoTIFF files for use with GIS applications.

   Note: The IMS product is considered operational, but NIC does not guarantee 
   availability or timely delivery of data via the NIC Web server, and NSIDC does 
   not guarantee availability of this product via the NSIDC Web server. These 
   servers should not be used to support operational observation, forecasting, 
   emergency, or disaster mitigation operations, either public or private. Users 
   with real-time operational needs should visit the NIC Web site and contact the National 
   Ice Center Liaison to request access to the operational server.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://www.ssd.noaa.gov/PS/SNOW/
   Description: NOAA SSD Snow Products
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 Products at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/g01962.html
   Description: Environmental Working Group Joint U.S.-Russian Arctic Sea Ice Atlas
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/g01962.html
   Description: Environmental Working Group Joint US-Russian Sea Ice Atlas
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0046.html
   Description: Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 2
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/g02158.html
   Description: Snow Data Assimilation System (SNODAS) Data Products at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/g02158.html
   Group: Description

      Snow Data Assimilation System (SNODAS) Data Products at SNOw Data Assimilation 
      System (SNODAS)Data Products at NSIDC

   End_Group
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/g02168.html
   Group: Description

      Timing and Statistics of Autumn and Spring Annual Snow Cover for the Northern 
      Hemisphere

   End_Group
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2008-01-01
Last_DIF_Revision_Date: 2013-09-11
DIF_Revision_History:  Fixed citation, no QC needed.