Monthly average polar sea-ice concentration 1978 through 1991

Metadata Updated: December 13, 2019

This data set represents the results of calculations carried out on sea-ice-concentration data from the SMMR and SSM/I instruments. The original data were obtained from the National Snow and Ice Data Center (NSIDC). The data set also contains the source code of the programs that made the calculations. The objective was to derive monthly averages for the whole 13.25-year series (1978-1991) and to derive a composite series of monthly averages representing the variation of an average year. The resulting file set contains monthly images for each of the polar regions for each year, yielding 160 files for each pole, and composite monthly averages in which the years are combined, yielding 12 more files. Averaging the images in this way tends to reduce the number of grid cells that lack valid data; the composite averages are designed to suppress interannual variability. Also included in the data set are programs that can retrieve seasonal ice-concentration profiles at user-specified locations. These nongraphical data retrieval programs are provided in versions for UNIX, extended DOS, and Macintosh computers. Graphical browse utilities are included for the same computing platforms but require more sophisticated display systems.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date February 20, 2015
Metadata Created Date October 10, 2019
Metadata Updated Date December 13, 2019
Reference Date(s) January 1, 1995 (publication)
Frequency Of Update irregular
Frequency Of Update irregular

Metadata Source

Harvested from DOI CKAN Harvest Source

Graphic Preview

Average February Northern Hemisphere sea-ice concentration plotted on a polar stereographic projection of the North Pole

Additional Metadata

Resource Type Dataset
Metadata Date February 20, 2015
Metadata Created Date October 10, 2019
Metadata Updated Date December 13, 2019
Reference Date(s) January 1, 1995 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: none, Access Constraints: none
Bbox East Long 180.0
Bbox North Lat 90.0
Bbox South Lat -90.0
Bbox West Long -180.0
Coupled Resource
Frequency Of Update irregular
Graphic Preview Description Average February Northern Hemisphere sea-ice concentration plotted on a polar stereographic projection of the North Pole
Graphic Preview File http://geo-nsdi.er.usgs.gov/metadata/digital-data/27/02n.gif
Graphic Preview Type GIF
Guid
Harvest Object Id e0703161-5af4-4ac2-9341-7b263794712f
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence Although all data and software published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1978-10-25
Temporal Extent End 1991-12-31

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