NOAA/NMC/CAC Arctic and Antarctic Monthly Sea Ice Extent, 1973-1990

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Entry ID

G00917

Summary

Sea ice extent from January 1973 through August 1990 was digitized from weekly operational sea ice charts produced by the Navy/NOAA Joint Ice Center. Charts were digitized by hand using a 1 degree latitude x 2.5 degrees longitude grid. The grid boxes were then summed in 1 degree latitude x 10 degrees longitude slices, and the ice covered area computed. The data represent the extent of sea ice at the end of each month, given for 36 10-degree longitudinal sectors in each hemisphere. Data were provided by the NOAA National Weather Service National Meteorological Center (NMC) Climate Analyses Center (CAC).

Geographic Coverage

 

Spatial Coordinates:
N: -50°     S: -90°     E: 180°     W: -180°    
N: 90°     S: 50°     E: 180°     W: -180°    

Data Set Citation

Dataset Creator: Ropelewski, C. F.
Dataset Title: NOAA/NMC/CAC Arctic and Antarctic Monthly Sea Ice Extent, 1973-1990
Dataset Release Date: 1983-01-01updated 1990
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/g00917.html
Dataset DOI: http://dx.doi.org/10.7265/N5Z60KZ1

Temporal Coverage

Start Date: 1973-01-31
Stop Date: 1990-08-31

Location Keywords

  • GEOGRAPHIC REGION POLAR
  • OCEAN ARCTIC OCEAN BAFFIN BAY
  • OCEAN ARCTIC OCEAN BEAUFORT SEA
  • OCEAN ARCTIC OCEAN CHUKCHI SEA
  • OCEAN ATLANTIC OCEAN NORTH ATLANTIC OCEAN
  • OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN BERING SEA
  • OCEAN SOUTHERN OCEAN AMUNDSEN SEA

Science Keywords

  • Cryosphere Sea Ice Ice Extent
  • Cryosphere Sea Ice Sea Ice Concentration
  • Oceans Sea Ice Ice Extent
  • Oceans Sea Ice Sea Ice Concentration

Ancillary Keywords

  • Antarctic
  • Arctic
  • Gridded Data
  • Model Input Data

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere
  • Oceans

Platform

  • AIRCRAFT
  • GROUND-BASED OBSERVATIONS
  • GROUND STATIONS
  • SATELLITES
  • SHIPS

Instrument

  • DIGITIZER
  • VISUAL OBSERVATIONS

Quality

The weekly chart dated closest to the end of the month was selected to represent the sea ice for that month, because it was not practical to analyze each of the weekly charts. This introduces error, or noise, into these estimates for year-to-year comparisons (Ropelewski, 1983). No quality assessment or quality control has been performed on these data at NSIDC.

Data Set Progress

complete

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

National Oceanic and Atmospheric Administration
Data Center URL: http://nsidc.org/noaa/

Data Center Personnel

Name: NOAA User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP

Personnel

Chester F. Ropelewski
Role: INVESTIGATOR

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW PROJECT HOME PAGE
Sea Ice Products at NSIDC

VIEW RELATED INFORMATION
Access to NMC/CAC sea ice information and data

Reference

Ropelewski, C.F. 1983. Spatial and temporal variations in Antarctic sea ice (1973-82). Journal of Climate and Applied Meteorology. 22,470-473.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 1983-01-01
Last DIF Revision Date: 2013-08-05

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

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

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