WALSH_CHAPMAN_SEAICE
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Walsh and Chapman Northern Hemisphere Sea Ice Data Set
J. Walsh and B. Chapman
Northern Hemisphere Sea Ice Data Set
1978-01-01T00:00:00.000Z
Chicago, IL
University of Illinois
http://www.cgd.ucar.edu/cas/guide/Data/walsh.html
INVESTIGATOR
JOHN
E.
WALSH
University of Illinois
Department of Atmospheric Sciences
105 South Gregory Avenue
Urbana
IL
61801
(217) 333-7521
Telephone
walsh@wx.atmos.uiuc.edu
INVESTIGATOR
BILL
CHAPMAN
Department of Atmospheric Sciences
University of Illinois
105 S. Gregory Avenue
Urbana
IL
61801
chapman@faldo.atmos.uiuc.edu
EARTH SCIENCE
CRYOSPHERE
SEA ICE
SEA ICE CONCENTRATION
EARTH SCIENCE
OCEANS
SEA ICE
SEA ICE CONCENTRATION
OCEANS
sea ice concentration
Arctic
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SMMR
Scanning Multichannel Microwave Radiometer
SSM/I
Special Sensor Microwave/Imager
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SHIPS
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DMSP
Defense Meteorological Satellite Program
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Nimbus-7
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1870-01-01T00:00:00.000Z
1998-12-31T23:59:59.999Z
monthly
COMPLETE
Horizontal
NO_SPATIAL
CARTESIAN
50.0
90.0
-180.0
180.0
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OCEAN
ARCTIC OCEAN
GEOGRAPHIC REGION
ARCTIC
GEOGRAPHIC REGION
POLAR
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English
ARCHIVER
DISTRIBUTOR
UI-UC/ATMO
Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign
https://www.atmos.illinois.edu/
DATA CENTER CONTACT
BILL
CHAPMAN
Department of Atmospheric Sciences
University of Illinois
105 S. Gregory Avenue
Urbana
IL
61801
chapman@faldo.atmos.uiuc.edu
ASCII text
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Mid-month values of sea ice concentration for the Arctic are 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).
These data are a compilation of data from many sources integrated into
a single gridded product by John Walsh and Bill Chapman, University of
Illinois. The sources of data for each grid cell have changed over
the years from infrequent land/sea observations, to observationally
derived charts, to satellite data for the most recent decades.
Temporal and spatial gaps within observed data are filled with a
climatology or other statistically derived data.
Please note that large portions of the pre-1953, and almost all of the
pre-1900 data is either climatology or interpolated data and the user
is cautioned to use this data with care.
The data sources for the ice concentrations vary spatially and
temporally. There are eight basic data sources for the ice
concentrations:
1. Danish Meteorlogical Institute
2. Japan Meteorological Agency
3. Naval Oceanographic Office (NAVOCEANO)
4. Kelly ice extent grids (based upon Danish Ice Charts)
5. Walsh and Johnson/Navy-NOAA Joint Ice Center
6. Navy-NOAA Joint Ice Center Climatology
7. Temporal extension of Kelly data (see note below)
8. Nimbus-7 SMMR Arctic Sea Ice Concentrations or
DMSP SSM/I Sea Ice Concentrations using the NASA Team Algorithm
VIEW RELATED INFORMATION
http://www.cgd.ucar.edu/cas/guide/Data/walsh.html
Decsription of the Walsh and Chapman sea ice concentration data set
USA/NASA
ARCTIC
CEOS IDN DIF
VERSION 10.2
2003-01-24
2018-07-13
1970-01-01T00:00:00
1970-01-01T00:00:00
metadata.extraction_date
STRING
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2015-12-02 12:55:30
metadata.keyword_version
FLOAT
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8.1
metadata.tool
STRING
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2018-07-13:docbuilder
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