G00799 Arctic and Southern Ocean Sea Ice Concentrations Chapman, W. L. and J. E. Walsh. Arctic and Southern Ocean Sea Ice Concentrations 1991-01-01updated 1996 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/g00799.html http://dx.doi.org/10.7265/N5057CVT Investigator John E Walsh walsh@wx.atmos.uiuc.edu 1 217 333-7521 x

University of Illinois at Urbana-Champaign

University of Illinois

Department of Atmospheric Sciences

105 South Gregory Avenue

Urbana IL 61801 Investigator P. M. Kelly 44 (0) 1603 56161

Climatic Research Unit

University of East Anglia

Norwich, UK NR4 7TJ

Technical Contact William L Chapman chapman@faldo.atmos.uiuc.edu

University of Illinois

Department of Atmospheric Sciences

University of Illinois

105 S. Gregory Avenue

Urbana IL 61801 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 Sea Ice Ice Extent EARTH SCIENCE Cryosphere Sea Ice Sea Ice Concentration EARTH SCIENCE Oceans Sea Ice Ice Extent EARTH SCIENCE Oceans Sea Ice Sea Ice Concentration EARTH SCIENCE Terrestrial Hydrosphere Snow/Ice Ice Extent Climatology/Meteorology/Atmosphere Oceans Antarctic Arctic Global Change Gridded Data Ice Concentration Model Input Data 1953-01-01 1995-08-31 complete -90 -50 -180 180 40 90 -180 180 GEOGRAPHIC REGION POLAR OCEAN ARCTIC OCEAN BARENTS SEA OCEAN ARCTIC OCEAN BEAUFORT SEA OCEAN ARCTIC OCEAN CHUKCHI SEA OCEAN ATLANTIC OCEAN OCEAN ATLANTIC OCEAN NORTH ATLANTIC OCEAN GREENLAND SEA OCEAN PACIFIC OCEAN BERING SEA OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN BERING SEA OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN GULF OF ALASKA OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN SEA OF JAPAN OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN SEA OF OKHOTSK OCEAN SOUTHERN OCEAN AMUNDSEN SEA 1 mon CGC NOAA Climate and Global Change Program ESIP Earth Science Information Partners Program English NSIDC_NOAA 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 NSIDC_NOAA NSIDC National Oceanic and Atmospheric Administration http://nsidc.org/noaa/ Data Center Contact NSIDC NOAA 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 Walsh, J.E., Data set on Northern Hemisphere sea ice extent, National Snow and Ice Data Center, Glaciological Data, Report GD-2, part 1, 49-51, 1978. Walsh, J.E. and C.M. Johnson, Analysis of Arctic sea ice fluctuations 1953-1977. J. Phys. Oceanogr. 9(3), 580-591, 1978.

Monthly sea ice concentration for Arctic (1901 to 1995) and Southern oceans (1973 to 1990) were digitized on a standard 1-degree grid (cylindrical projection) to provide a relatively uniform set of sea ice extent for all longitudes, as a basis for hemispheric scale studies of observed sea ice fluctuations (Walsh 1978). The Arctic grid covers the Arctic Ocean and portions of peripheral seas where sea ice occurs during all or part of the year. The Southern Ocean grid extends to approximately 50 degrees south latitude. Potential uses of this data set include statistical analysis of anomalies in different regions, computing regional and hemispheric trends, and modeling the high latitude surface energy budget. Data sources are U.S. Fleet Weather Facility, U.S. Navy National Ice Center (formerly Navy/NOAA Joint Ice Center), U.S. Naval Oceanographic Office, Canadian Department of Transport, British Meteorological Office, Danish Meteorological Institute, Norwegian Polar Institute, and Icelandic ice summaries. Data are available via ftp. Software to select and print grids by date is also available.

VIEW PROJECT HOME PAGE http://nsidc.org/data/seaice/ Sea Ice Products at NSIDC VIEW RELATED INFORMATION http://nsidc.org/data/G00799.html Access to sea ice concentration information and data USA/NASA CEOS IDN DIF 9.7 1991-01-01 2013-03-25 Fixed broken data access link.