This data set provides estimates of Arctic sea ice extent and concentration from 1901 to 1956 created from a collection of historic, hand-drawn sea ice charts from the Danish Meteorological Institute (DMI). These were used to create estimates for each summer month from 1901 to 1956 by manual, subjective interpretation of scanned versions of the charts. These estimates, shown in colored-coded fields, are available as image files in JPEG format and as GIS shapefiles.
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Spatial Extent: | Bounding Rectangle: N: 90.0 S: 55.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: ESRI Shapefile, JPEG |
Temporal Extent: | Platform(s): | FIELD SURVEYS, GROUND-BASED OBSERVATIONS, SHIPS | |
Data Center(s): | NSIDC | Instrument(s): | VISUAL OBSERVATIONS |
Version: | 1 |
10.7265/N5MP517M
NA
Not Applicable
Complete
Coverage Type | Zone Identifier | Geometry | Granule Representation |
---|---|---|---|
HORIZONTAL | CARTESIAN | GEODETIC |
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder,
CO
80309-0449
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder,
CO
80309-0449
CIRES, 449 UCB
University of Colorado
Boulder,
CO
80309-0449
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Boulder, CO
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Boulder, CO
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Boulder, Colorado
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Format: ESRI Shapefile
Format Type: Native
Format Description: FTP
Format: JPEG
Format Type: Native
Format Description: FTP