NSIDC-0321 Global EASE-Grid 8-day Blended SSM/I and MODIS Snow Cover M. J. Brodzik, R. L. Armstrong, and M. Savoie Global EASE-Grid 8-day Blended SSM/I and MODIS Snow Cover 2007-12-05 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/nsidc-0321.html Investigator Mary J. Brodzik brodzik@nsidc.org

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 Investigator Richard Armstrong rlax@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES 449 UCB

University of Colorado

Boulder Colorado 80309-0449 USA Investigator Matthew Savoie savoie@nsidc.org

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA Technical Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 x 1 303 492-2468 x

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA EARTH SCIENCE Cryosphere Snow/Ice Snow Cover EARTH SCIENCE Cryosphere Snow/Ice Snow Water Equivalent EARTH SCIENCE Cryosphere Snow/Ice Snow Water Equivalent Climatology/Meteorology/Atmosphere Antarctic Arctic Ease EASE-Grid Gridded Data MODIS Northern Hemisphere Snow Cover Snow Water Equivalent Southern Hemisphere Special Sensor Microwave/Imager SSM/I MODIS Moderate-Resolution Imaging Spectroradiometer SSM/I Special Sensor Microwave/Imager DMSP Defense Meteorological Satellite Program TERRA Earth Observing System, TERRA (AM-1) 2000-03-05 2008-02-01 in work -90 0 -180 180 0 90 -180 180 GEOGRAPHIC REGION NORTHERN HEMISPHERE GEOGRAPHIC REGION SOUTHERN HEMISPHERE 25 km 25 km 25 km 25 km 8 days EOSDIS Earth Observing System Data Information System English NSIDC_DAAC NSIDC_DAAC NASA DAAC at the National Snow and Ice Data Center http://nsidc.org/daac/index.html Data Center Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA NSIDC National Snow and Ice Data Center http://nsidc.org Data Center Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA FTP 12 - 40 KB PNG FTP 85 - 104 MB NetCDF Armstrong, R. L., and M. J. Brodzik. 2005. Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Armstrong, R. L., M. J. Brodzik, J. R. Wang, M. H. Savoie, O. Frauenfeld, T. Zhang. 2004. Solutions to the Snow Cover Mapping Anomaly Over the Tibetan Plateau (poster). EOS, Transactions, American Geophysical Union, 85(47), Fall Meeting Supplement Abstract C31A-0282. 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 Sensors. Geophysical Research Letters, 23(19):3673-3676. Brodzik, M. J., R. L. Armstrong, K. Knowles, M. H. Savoie. 2005. The Effect of Sensor Differences in Deriving Long-Term Trends from Satellite Passive Microwave Snow Extent and Snow Water Equivalent. EOS, Transactions, American Geophysical Union, 86(52), Fall Meeting Supplement Abstract U21A-0804. Brodzik, M. J. and K. W. Knowles. 2002. 'EASE-Grid: A Versatile Set of Equal-area Projections and Grids.' Discrete Global Grids National Center for Geographic Information & Analysis. http://www.ncgia.ucsb.edu/globalgrids-book/ease_grid/. Chang, A. T. C., J. L. Foster, D. K. Hall. 1996. Effects of Forest on the Snow Parameters Derived from Microwave Measurements During the BOREAS Winter Field Campaign. Hydrological Processes, 10:1565-1574. Chang, A. T. C., J. L. Foster, D. K. Hall. 1987. Nimbus-7 SMMR Derived Global Snow Cover Parameters. Annals of Glaciology, 9:39-44. Derksen, C. and M. MacKay. 2006. The Canadian Boreal Snow Water Equivalent Band. Atmosphere-Ocean, 44(3):305-320. 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 CO, USA: National Snow and Ice Data Center. Digital Media ftp://sidads.colorado.edu/pub/EASE/Nl.BU-MODIS.tar.gz. Nagler, Thomas, and H. Rott 1992. Development and Intercomparisons of Snow Mapping Algorithms Based on SSM/I Data. IEEE Proceedings International Geoscience and Remote Sensing Symposium 1992, Houston, N.p., 812-814. Savoie, M. H., J. Wang, M. J. Brodzik, R. L. Armstrong. 2007. Improved Snow Cover Retrievals from Satellite Passive Microwave Data Over the Tibet Plateau: The Need for Atmospheric Corrections Over High Elevations (poster). EOS, Transactions, American Geophysical Union, 88(52), Fall Meeting Supplement Abstract C23A-0942.

This data set comprises global, 8-day Snow-Covered Area (SCA) and Snow Water Equivalent (SWE) data from 2000 through 2008. Global SWE data are derived from the Special Sensor Microwave Imager (SSM/I) and are enhanced with MODIS/Terra Snow Cover 8-Day Level 3 Global 0.05 degree Climate Modeling Grid (CMG) data. Global data are gridded to the Northern and Southern 25 km Equal-Area Scalable Earth Grids (EASE-Grids). These data are suitable for continental-scale time-series studies of snow cover and snow water equivalent. The data are in netCDF data files and PNG browse image files available via FTP.

VIEW RELATED INFORMATION http://nsidc.org/data/ease/ All About EASE-Grid VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0032.html DMSP SSM/I Pathfinder daily EASE-Grid Brightness Temperatures VIEW RELATED INFORMATION http://nsidc.org/data/mod10c2.html MODIS/Terra snow cover 8-day L3 global 0.05deg CMG V005 VIEW RELATED INFORMATION http://nsidc.org/data/nsidc-0046.html Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3 CEOS IDN DIF 9.7 2007-12-05 2012-10-02 Updated temporal coverage.