AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations  View Catalog Page Entry ID
NSIDC-0050
Summary
NOTE: This data set has been replaced by the Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006 data set.
These gridded ice charts represent a reformatting of information contained in another data set, the Russian Arctic and Antarctic Research Institute's (AARI) 10 Day Digital Arctic Sea Ice Charts. AARI digitized Arctic sea ice concentration and stage of development charts as part of an international data exchange program. The AARI source charts, similar to operational charts distributed by the National Ice Center describing ice type and constitution, were developed from aircraft and satellite observations for shipping purposes, and provide extremely detailed information. Such data are particularly valued in process studies tracking the growth and recession of polynyas, or for looking at the preponderance of ice at certain stages of development in a particular area. NSIDC does not maintain the operational charts, but archives the AARI digitized version. However, the Arctic and Antarctic Research Institute (AARI) 10 Day Digital Arctic Sea Ice Charts were encoded in SIGRID (Sea Ice Grid) format, which assigns numerical values to ice parameters and records them at specific lat/lon grid points. But due to the difficulties of visualizing, extracting and working with data in SIGRID, NSIDC is now providing AARI data in NSIDC's Equal Area SSM/I Earth Grid.
The EASE-Grid format makes it especially easy to compare observed ice concentrations or ice types with the same parameters derived from satellite data (such as ice concentrations from passive microwave sensors).
AARI sea ice data in the EASE-Grid projection are gridded at a 12.5 km resolution, for both Western (24W to 110E) and Eastern (105E to 130W) sectors . Data extend from 1953 through 1990, and are available via ftp in compressed tar format. Postscript (.ps) files depicting coverage per year are also provided with the data.
Geographic Coverage
Spatial Coordinates:
N: 90°
S: 45°
E: 105°
W: -130°
N: 90°
S: 68°
E: 110°
W: -24°
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Data Set Citation
Dataset Creator: Fetterer, F.
Dataset Title: AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations
Dataset Release Date: 1997-06-15
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0050.html
Temporal Coverage
Start Date: 1953-01-01
Stop Date: 1990-12-30
Data Resolution
Latitude Resolution: 12.5 km
Longitude Resolution: 12.5 km
Temporal Resolution: 10 days
Location Keywords
- OCEAN ARCTIC OCEAN BARENTS SEA
- OCEAN ARCTIC OCEAN BEAUFORT SEA
- OCEAN ARCTIC OCEAN CHUKCHI SEA
- OCEAN ATLANTIC OCEAN NORTH ATLANTIC OCEAN
- OCEAN ATLANTIC OCEAN NORTH ATLANTIC OCEAN GREENLAND SEA
- OCEAN PACIFIC OCEAN NORTH PACIFIC OCEAN BERING SEA
Science Keywords
- Cryosphere Sea Ice Ice Extent
- Cryosphere Sea Ice Ice Growth/Melt
- Cryosphere Sea Ice Ice Types
- Cryosphere Sea Ice Sea Ice Age
- Cryosphere Sea Ice Sea Ice Concentration
- Cryosphere Snow/Ice Ice Extent
- Oceans Sea Ice Ice Extent
- Oceans Sea Ice Ice Types
- Oceans Sea Ice Polynyas
- Oceans Sea Ice Sea Ice Age
- Terrestrial Hydrosphere Snow/Ice Ice Extent
Ancillary Keywords
- Arctic
- ICE CHARTS
- Ice Form
- North Polar Basin
- Sea Ice Concentration
- Sea Ice Extent
- Sea Ice Form
- Sea Ice Stage Of Development
- Stage Of Development
- Climatology/Meteorology/Atmosphere
- Oceans
Instrument
Project
- EOSDIS Earth Observing System Data Information System
- ESIP Earth Science Information Partners Program
Quality
It is impossible to assess errors that might have occurred in translating ice observations to the original operational charts and to SIGRID files, since these steps were performed at AARI. However, AARI estimates that ice edge boundaries are generally accurate to between 2 and 10 km under typical ice reconnaissance conditions, and to within 50 km under the worst conditions.
Quality control routines assessed the 'correctness' of the AARI coding (i.e., checked whether the AARI implementation of SIGRID matched the published standard). Few errors were found in AARI's coding of the files.
Access Constraints
These data are freely available to the public.
Use Constraints
None.
Data Set Progress
complete
Data Center
NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html
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 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
NSIDC National Oceanic and Atmospheric Administration
Data Center URL: http://nsidc.org/noaa/
Data Center Personnel
Name: NSIDC NOAA 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
Personnel
Florence Fetterer
Role: INVESTIGATOR
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
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
Global Digital Sea Ice Data Bank (GDSIDB)
VIEW PROJECT HOME PAGE
Sea Ice Products at NSIDC
VIEW RELATED INFORMATION
All About EASE-Grid
VIEW RELATED INFORMATION
National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format
VIEW RELATED INFORMATION
Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006
Reference
Bushuev, A. V., R. G. Barry, V. M. Smolyanitsky, and V. J. Troisi. 1994. Format to Provide Sea Ice Data for the World Climate Program (SIGRID-2). Unpublished report to the World Meteorological Organization Commission for Marine Meteorology.
Environment Canada. 1989. Ice Charts: WMO Symbols for the Hatching of Total Concentration of Ice. Manual of Standard Procedures for Observing and Reporting Ice Conditions. Atmospheric Environment Service, Ottawa Ontario. p. 3-21 - 3-31.
Environment Canada. 1992. Ice Terminology: Ice Codes and Symbols, Egg Code. MANIS, Manual of Ice Services. Atmospheric Environment Service. Ottawa, Ontario. sect. A.3.
Kokaly, Raymond F. 1996. Format for Gridded Sea Ice Information (SIGRID). Special Report to the National Snow and Ice Data Center, Boulder, Colorado.
Kokaly, Raymond F. 1996. An Evaluation of the Results from Using Nearest Neighbor and Area Min/Max Resampling Methods to Regrid AARI Digitized Sea Ice Charts to EASE-Grid. Special Report to theNational Snow and Ice Data Center, Boulder, Colorado.
Thomas Thompson. 1981. Proposed Format for Gridded Sea Ice Information (SIGRID). Unpublished report prepared for the World Climate Programme.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 1997-06-15
Last DIF Revision Date: 2013-03-12
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