Entry_ID: G02158
Entry_Title: Snow Data Assimilation System (SNODAS) Data Products at NSIDC
Group: Data_Set_Citation
   Dataset_Creator: National Operational Hydrologic Remote Sensing Center. 
   Dataset_Title: Snow Data Assimilation System (SNODAS) Data Products at NSIDC
   Dataset_Release_Date: 2004-03-29
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/g02158.html
   Dataset DOI: http://dx.doi.org/10.7265/N5TB14TC
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Tom
   Last_Name: Carroll
   Group: Contact_Address
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: 1735 Lake Drive W.
      City: Chanhassen
      Province_or_State: MN
      Postal_Code: 55317
      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 Water Vapor
   Variable_Level_1: Sublimation
   Detailed_Variable: Blowing Snow Sublimation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Water Vapor
   Variable_Level_1: Sublimation
   Detailed_Variable: Snow Pack Sublimation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Precipitation
   Variable_Level_1: Precipitation Amount
   Detailed_Variable: Scaled Precipitation  Non-Snow
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Precipitation
   Variable_Level_1: Precipitation Amount
   Detailed_Variable: Scaled Precipitation - Snow
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Precipitation
   Variable_Level_1: Rain
   Detailed_Variable: Liquid Precipitation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Depth
   Detailed_Variable: Snowpack Thickness
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
   Detailed_Variable: Snowpack Average Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Melt
   Detailed_Variable: Snow Melt Rate
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Water Equivalent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Depth
   Detailed_Variable: Snowpack Thickness
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Temperature
   Detailed_Variable: Snowpack Average Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Melt
   Detailed_Variable: Snow Melt Rate
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Water Equivalent
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: g02158
Keyword: Modeling
Keyword: National Operational Hydrologic Remote Sensing Center
Keyword: NOAA
Keyword: NOHRSC
Keyword: Numerical Weather Prediction
Keyword: NWP
Keyword: SNODAS
Keyword: Snow Cover
Keyword: SNOw Data Assimilation System
Keyword: Snow Water Equivalent
Keyword: SWE
Source_Name: AIRCRAFT
Source_Name: GROUND STATIONS
Source_Name: MODELS
Source_Name: SATELLITES
Group: Temporal_Coverage
   Start_Date: 2003-09-28
   Stop_Date: 2014-07-27
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: 24.9504
   Northernmost_Latitude: 52.8754
   Westernmost_Longitude: -124.7337
   Easternmost_Longitude: -66.9421
End_Group
Group: Data_Resolution
   Latitude_Resolution: 1 km
   Longitude_Resolution: 1 km
   Temporal_Resolution: 1 day
End_Group
Data_Set_Language: English
Originating_Center: NOAA
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: 2 - 100 MB
   Distribution_Format: Binary
End_Group
Group: Reference

   Barrett, Andy. 2003. National Operational Hydrologic Remote Sensing Center 
   Snow Data Assimilation System (SNODAS) Products at NSIDC. NSIDC Special Report 
   11. Boulder, CO USA: National Snow and Ice Data Center. 19 pp.

   Carroll, T., D. Cline, G. Fall, A. Nilsson, L. Li, and A. Rost. 2001. NOHRSC 
   Operations and the Simulation of Snow Cover Properties for the Conterminous 
   U.S. Proceedings of the 69th Annual Meeting of the Western Snow Conference, 
   pp. 1-14.

   Carroll, T. 2005. Overview of the Center's Web Site and Products . National 
   Operational Hydrologic Remote Sensing Center, 15 pp.

   Jordan, R. 1990. User's guide for USA-CRREL one-dimensional snow temperature 
   model (SNTHERM.89). USA Cold Regions Research and Engineering Laboratory 
   (CRREL), 18 pp.

End_Group
Group: Summary

   

Notice: If you are having difficulties subsetting SNODAS data via Polaris, please contact nsidc@nsidc.org.

This data set contains output from the NOAA National Weather Service's National Operational Hydrologic Remote Sensing Center (NOHRSC) SNOw Data Assimilation System (SNODAS). SNODAS is a modeling and data assimilation system developed by NOHRSC to provide the best possible estimates of snow cover and associated parameters to support hydrologic modeling and analysis. The aim of SNODAS is to provide a physically consistent framework to integrate snow data from satellite, airborne platforms, and ground stations with model estimates of snow cover (Carroll et al. 2001). SNODAS includes procedures to ingest and downscale output from the Numerical Weather Prediction (NWP) models, and to simulate snowcover using a physically based, spatially-distributed energy- and mass-balance snow model. SNODAS also includes procedures to assimilate satellite-derived, airborne, and ground-based observations of snow covered area and Snow Water Equivalent (SWE). These data are not suitable for snow fall events or totals for specific regions. For snow fall data, please see the state climatology reports for a particular state. These are gridded data sets for the continental United States at 1 km spatial resolution and 24 hour temporal resolution. Data are stored in flat binary 16-bit signed integer big-endian format with header and metadata files, and are available from 1 October 2003 to present via FTP. End_Group Metadata_Name: CEOS IDN DIF Metadata_Version: 9.7 DIF_Creation_Date: 2004-03-29 Last_DIF_Revision_Date: 2014-06-18 DIF_Revision_History: Minor change to format. No QC needed.