Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent  View Catalog Page Entry ID
NISE1
Summary
The Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent product (Near-real-time Ice and Snow Extent, NISE) provides daily, global near-real-time maps of sea ice concentrations and snow extent. The National Snow and Ice Data Center (NSIDC) creates the current NISE product using passive microwave data from the Special Sensor Microwave Imager/Sounder (SSMIS) on board the Defense Meteorological Satellite Program (DMSP) F17 satellite. The SSMIS instrument is the next generation Special Sensor Microwave/Imager (SSM/I) instrument. These data are not suitable for time series, anomalies, or trends analyses. They are meant to provide a best estimate of current ice and snow conditions based on information and algorithms available at the time the data are acquired. Near-real-time products are not intended for operational use in assessing sea ice conditions for navigation. Sea ice concentration and snow extent maps are provided in two 25 km azimuthal, equal-area projections: the Southern Hemisphere 25 km low resolution (SL) and Northern Hemisphere 25 km low resolution (NL) Equal-Area Scalable Earth-Grids (EASE-Grids). The NISE product is updated daily using the best available data from the past five days. Data are in Hierarchical Data Format - Earth Observing System (HDF-EOS) format and browse files are in GIF and HDF formats. HDF-EOS data files are available from 04 May 1995 through the present. Data in both formats are updated daily and are available via FTP.
Geographic Coverage
Spatial Coordinates:
N: 90°
S: -90°
E: 180°
W: -180°
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Data Set Citation
Dataset Creator: Nolin, A. W., R. Armstrong, and J. Maslanik.
Dataset Title: Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent
Dataset Release Date: 1998-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nise1.html
Temporal Coverage
Start Date: 1995-05-04
Data Resolution
Temporal Resolution: 1 day
Location Keywords
- CONTINENT ANTARCTICA
- GEOGRAPHIC REGION ARCTIC
- GEOGRAPHIC REGION NORTHERN HEMISPHERE
- GEOGRAPHIC REGION SOUTHERN HEMISPHERE
Science Keywords
- Cryosphere Sea Ice Ice Extent
- Cryosphere Sea Ice Sea Ice Concentration
- Cryosphere Snow/Ice Ice Extent
- Cryosphere Snow/Ice Snow Cover
- Oceans Sea Ice Ice Extent
- Oceans Sea Ice Sea Ice Concentration
- Terrestrial Hydrosphere Snow/Ice Ice Extent
- Terrestrial Hydrosphere Snow/Ice Snow Cover
Ancillary Keywords
- Antarctic
- Arctic
- DAAC
- ECS
- EOSDIS
- Global
- Global Change
- Gridded Data
- HDF-EOS
- Hierarchical Data Format
- Ice
- Ice Concentration
- NASA
- Near Real-time
- NISE
- NSIDC
- Passive Microwave
- Polar
- Remote Sensing
- Sea Ice
- Sea Ice Concentration
- Sea Ice Extent
- Snow
- Snow Extent
- Climatology/Meteorology/Atmosphere
Platform
- DMSP 5D-2/F13 Defense Meteorological Satellite Program-F13
- DMSP 5D-3/F17 Defense Meteorological Satellite Program-F17
Instrument
- SSM/I Special Sensor Microwave/Imager
- SSMIS Special Sensor Microwave Imager/Sounder
Project
- EOSDIS Earth Observing System Data Information System
- ESIP Earth Science Information Partners Program
Use Constraints
NASA provided funding for the production of this data set through the National Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC). NSIDC requests that prospective data users tell us how the data will be used and agree to contribute comments regarding the usefulness, relevance, and accuracy of the data). Such feedback is essential to ensure ongoing product improvement.
Data Set Progress
in work
Originating Center
NSIDC_DAAC
Data Center
NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html
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
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
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
Distribution
Distribution Media: FTP
Distribution Size: 2.1 MB
Distribution Format: HDF-EOS
Personnel
NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
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
Anne W. Nolin
Role: INVESTIGATOR
Contact Address:
- Oregon State Univesity
- Department of Geosciences
- Oregon State University
- 104 Wilkinson Hall
City: Corvallis
Province or State: OR
Postal Code: 80309-0449
Richard Armstrong
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: rlax@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- National Snow and Ice Data Center
- CIRES 449 UCB
- University of Colorado
City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA
Richard Armstrong
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: rlax@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- National Snow and Ice Data Center
- CIRES 449 UCB
- University of Colorado
City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA
Jim Maslanik
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@kryos.colorado.edu
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309
Jim Maslanik
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@kryos.colorado.edu
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309
Related URL
VIEW PROJECT HOME PAGE
Sea Ice Data
Reference
Armstrong, R. L. and M. J. Brodzik. 2002. Hemispheric-Scale Comparison and Evaluation of Passive-Microwave Snow Algorithms. Annals of Glaciology 34: 38-44.
Armstrong, R. L. and M. J. Brodzik. 2001. Recent Northern Hemisphere Snow Extent: A Comparison of Data Derived from Visible and Microwave Satellite Sensors. Geophysical Research Letters 28(19): 3673-3676.
Armstrong, R. L., and M. J. Brodzik. 1995. An Earth-Gridded SSM/I Data Set for Cryospheric Studies and Global Change Monitoring. Advances in Space Research 16: 155-63.
Brodzik, M. J. 1998. The EASE-Grid, A Versatile Set of Equal-Area Projections and Grids. Unpublished report to the National Snow and Ice Data Center, Boulder, Colorado USA.
Cavalieri, D. J., C. l. Parkinson, P. Gloersen, J. C. Comiso, and H. J. Zwally. 1999. Deriving Long-Term Time Series of Sea Ice Cover from Satellite Passive-Microwave Multisensor Data Sets. Journal of Geophysical Research 104(7): 15,803-15,814.
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. National Aeronautics and Space Administration, Washington, D. C. 126 pages.
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): 5355-69.
Chang, A. T. C., J. L. Foster, and D. K. Hall. 1987. Nimbus-7 SMMR Derived Global Snow Cover Parameters. Annals of Glaciology 9: 39-44.
Goodison, B. E. 1989. Determination of Areal Snow Water Equivalent on the Canadian Prairies Using Passive Microwave Satellite Data. IGARRS '89 Proceedings 3:1243-6.
Hollinger, J . P., R. C. Lo, G . A. Poe, R. Savage, and J . L. Peirce, 1987. Special Sensor Microwave/Imager User's Guide. Washington, D.C.: Naval Research Laboratory.
Knowles, K. 1992. Points, pixels, grids, and cells: A mapping and gridding primer. Unpublished report to the National Snow and Ice Data Center, Boulder, Colorado USA.
National Snow and Ice Data Center. 2005. EASE-Grid Version of BU-MODIS Land Cover Characterization. ftp://sidads.colorado.edu/pub/EASE/. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media.
NSIDC User's Guide. 1996. DMSP SSM/I Brightness Temperatures and Sea Ice Concentration Grids for the Polar Regions. 2d ed. NSIDC/DAAC, Boulder, Colorado USA.
Schwerdtfeger, W. 1976. Climate of Central and South America. World Survey of Climatology 12. New York: Elsevier Scientific Publishing.
Swift, C. T., and D. J. Cavalieri. 1985. Passive Microwave Remote Sensing for Sea Ice Research. EOS 66(49): 1210-2.
Wentz, F. J. 1992. Production of SSM/I data sets. NASA Final Report. Contract NAS8-38075.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 1998-01-01
Last DIF Revision Date: 2013-03-11
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