Snow Data Assimilation System (SNODAS) Data Products at NSIDC

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Entry ID

G02158

Summary

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-balence 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.

Data Set Citation

Dataset Creator: NOHRSC
Dataset Title: Snow Data Assimilation System (SNODAS) Data Products at NSIDC
Dataset Release Date: 2004-03-31
Dataset Release Place: Boulder, CO
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
Online Resource: http://nsidc.org/data/g02158.html

Temporal Coverage

Start Date: 2003-10-01

Science Keywords

• Atmosphere Atmospheric Water Vapor Sublimation Blowing snow sublimation
• Atmosphere Atmospheric Water Vapor Sublimation Snow pack sublimation
• Atmosphere Precipitation Precipitation Amount Scaled precipitation non-snow
• Atmosphere Precipitation Precipitation Amount Scaled precipitation - snow
• Atmosphere Precipitation Rain Liquid precipitation
• Cryosphere Snow/Ice Snow Depth Snowpack thickness
• Cryosphere Snow/Ice Snow Melt Snow melt rate
• Cryosphere Snow/Ice Snow Water Equivalent
• Cryosphere Snow/Ice Snow/Ice Temperature Snowpack average temperature
• Terrestrial Hydrosphere Snow/Ice Snow Depth Snowpack thickness
• Terrestrial Hydrosphere Snow/Ice Snow Melt Snow melt rate
• Terrestrial Hydrosphere Snow/Ice Snow Water Equivalent
• Terrestrial Hydrosphere Snow/Ice Snow/Ice Temperature Snowpack average temperature

Ancillary Keywords

• g02158
• Modeling
• National Operational Hydrologic Remote Sensing Center
• NOAA
• NOHRSC
• Numerical Weather Prediction
• NWP
• SNODAS
• Snow Cover
• SNOw Data Assimilation System
• Snow Water Equivalent
• SWE

ISO Topic Category (View Definitions)

• Climatology/Meteorology/Atmosphere

Platform

• AIRCRAFT
• GROUND STATIONS
• MODELS
• SATELLITES

Data Set Progress

IN WORK

Originating Center

NSIDC_NOAA

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Set ID: g02158

Data Center Personnel

Name: NSIDC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

NSIDC Distributed Active Archive Center
Data Center URL: http://nsidc.org/daac/index.html
Data Set ID: g02158

Data Center Personnel

Name: NSIDC DAAC User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

NSIDC National Oceanic and Atmospheric Administration
Data Center URL: http://nsidc.org/noaa/
Data Set ID: g02158

Data Center Personnel

Name: NSIDC NOAA User Services
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: ftp
Distribution Size: 2 MB - 25 MB for daily data files
Distribution Format: ASCII text files

Personnel

Tom Carroll
Role: INVESTIGATOR
Contact Address:
National Weather Service
National Operational Hydrologic Remote Sensing Center
1735 Lake Drive W.
City: Chanhassen
Province or State: MN
Postal Code: 55317
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: (303) 492-6199
Fax: (303) 492-2468
Email: nsidc@nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

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.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2004-03-10

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)