Sea Ice Index

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Identification Information:

Dataset Identifier:

G02135

Citation:

Citation Information:

Originator: Fetterer, F., K. Knowles, W. Meier, and M. Savoie.
Publication Date: 20021205
Title: Sea Ice Index
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/g02135.html
Online Linkage: http://dx.doi.org/10.7265/N5QJ7F7W

Description:

Abstract:

The Sea Ice Index provides a quick look at Arctic- and Antarctic-wide changes in sea ice. It is a source for consistent, up-to-date sea ice extent and concentration images and data values from November 1978 to the present.

Sea Ice Index images depict ice cover and trends in ice cover in the Arctic and Antarctic oceans. Sea Ice Index data files tabulate ice extent in numbers. The images and data are produced in a consistent way that makes the Index time-series appropriate for use when looking at long-term trends in sea ice cover. Both monthly and daily products are available. However, monthly products are better to use for long-term trend analysis because errors in the daily product tend to be averaged out in the monthly product and because day-to-day variations are often the result of short-term weather.

Monthly images show sea ice extent with an outline of the median extent for that month for comparison. Other monthly images show sea ice concentration as well as trends in concentration for that month. Monthly extent products are also available as geographic information systems (GIS) compatible shapefiles. Plain ASCII text data files contain monthly mean extent and area, in millions of square kilometers, by year. These monthly extent numbers are used for graphs of extent anomalies with trend lines and significance intervals. Anomalies and median extent are calculated using a 30-year reference period of 1981 through 2010.

Daily images show sea ice extent, with an outline of the median extent for that day for comparison, and sea ice concentration. Plain ASCII text data files contain daily extent, in millions of square kilometers, for almost every day from 1978 onward. These daily extent numbers are used for graphs of daily extent over the last four months.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Fetterer, F., K. Knowles, W. Meier, and M. Savoie.
Publication Date: 20021205
Title: Sea Ice Index
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/noaa/g02135_seaice_index/index.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 19790101
Ending Date: Unknown

Currentness Reference: publication date

Status:

Progress: In work
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -180°
East Bounding Coordinate: 180°
North Bounding Coordinate: 90°
South Bounding Coordinate: -90°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Ice Extent
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Ice Growth/Melt
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Reflectance
Theme Keyword: EARTH SCIENCE Cryosphere Sea Ice Sea Ice Concentration
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Ice Extent
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Ice Growth/Melt
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Reflectance
Theme Keyword: EARTH SCIENCE Oceans Sea Ice Sea Ice Concentration

Theme:

Theme Keyword Thesaurus: None
Theme Keyword:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
Theme Keyword: SMMR Scanning Multichannel Microwave Radiometer
Theme Keyword: SSM/I Special Sensor Microwave/Imager
Theme Keyword: SSMIS Special Sensor Microwave Imager/Sounder

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
Theme Keyword: DMSP 5D-3/F17 Defense Meteorological Satellite Program-F17
Theme Keyword: DMSP Defense Meteorological Satellite Program
Theme Keyword: NIMBUS-7
Theme Keyword: SATELLITES

Theme:

Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: climatologyMeteorologyAtmosphere
Theme Keyword: oceans

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: NOAA
Theme Keyword: Sea Ice
Theme Keyword: Sea Ice Anomalies
Theme Keyword: Sea Ice Conditions
Theme Keyword: Sea Ice Trends

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent Antarctica
Place Keyword: Geographic Region Arctic

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199 x
Contact Facsimile Telephone: 1 303 492-2468 x
Contact Electronic Mail Address: nsidc@nsidc.org

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Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

G02135

Distribution Liability:

NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: PNG

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ASCII Text (.txt)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

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Metadata Reference Information:

Metadata Date:

20140106

Metadata Review Date:

20140106

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

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Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata