NOAA@NSIDC

Stewards of data, past and present

GDSIDB Home About GDSIDB Data Formats Data Holdings SIGRID-3 Development

GDSIDB Data Holdings


Arctic and Antarctic Research Institute (AARI)

AARI's collection is easily viewed using an on-line browse tool. There you will find statistical summaries and data series of total concentration provided as GIF images.

Arctic
Greenland Sea
Baltic Sea
Antarctic

National Snow and Ice Data Center (NSIDC)

The GDSIDB was initially established as a pilot program using data from test year 1982. At present, the GDSIDB at NSIDC consists of the data sets in the table below. Note that NSIDC has distributed only the U.S. National Ice Center (NIC) data and Russian Federation, AARI, data.

Users often find simple gridded ice concentration data easier to work with than SIGRID-1, SIGRID-2, or SIGRID-3 data. For this reason, NSIDC published an EASE-Grid version of the NIC and AARI data.

Most ice services have no easy way to produce charts in SIGRID-1, SIGRID-2, or SIGRID-3 format. As a result, the GDSIDB lacks complete records from all services with the exception of the Japan Meteorological Agency. This problem has been addressed through the International Ice Charting Working Group Ad Hoc Format team, and will be taken up by JCOMM.
 

History of GDSIDB Data Sets at NSIDC
Arctic (Alaskan and Canadian coasts)
Originator William H. Dehn and Sea Ice Consultants, Inc.
Record length/
Chart frequency
1953-1986; frequency varies from about 80 to about 350 charts per year
Format

PNG and TIFF

Data available
from NSIDC?
Yes. The Dehn Collection of Arctic Sea Ice Charts, 1953-1986 is publicly available.
NSIDC reference numbers G01111, FD0170
Arctic (complete coverage)
Originator U.S. National Ice Center
Record length/
Chart frequency
1972-2004; monthly climatology products are median, maximum, minimum, first quartile, and third quartile concentrations, as well as frequency of occurrence of ice at any concentration for 33 year, 10 year, and 5 year periods
Format EASE-Grid, GIF and GIS (geodatabase)
Data available
from NSIDC?
Yes. The data set title is National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format
NSIDC reference number G02172
Arctic and Antarctic
Originator U.S. National Ice Center
Record length/
Chart frequency
1972-1994, every seven days
Format SIGRID-1

(EWG Atlas is in SIGRID, EASE-Grid, and GIS formats.)
Data available
from NSIDC?
No.
NSIDC reference numbers FD4, FD20, G00793
EWG Atlas: G01962
Notes SIGRID data were distributed on a CD-ROM titled "NIC Arctic and Antarctic Sea Ice Data", published by NIC and NOAA NCDC. Coding errors for ice type were discovered the CD-ROM was removed from circulation.

The Arctic portion was replaced in 2000 by the quality-controlled data on the Environmental Working Group Joint U.S.-Russian Arctic Sea Ice Atlas and later by the National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format.
Canadian Arctic
Originator Canadian Ice Service
Record length/
Chart frequency
March 2006-present; weekly
Format SIGRID-3
Data available
from NSIDC?
Yes. We archive the data, but are not distributing the data set as of 12/10/2007.
NSIDC reference number G02171
Eurasian Arctic
Originator Russian Federation, AARI
Record length/
Chart frequency
1953-1990, every ten days
Format Original format: SIGRID-1,2
Distributed version: EASE-Grid
Data available
from NSIDC?
No. This data set has been replaced by the AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations and then replaced in 2007 by Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006.
NSIDC reference numbers FD157
EASE-Grid product: G02119
Russian Arctic
Originator AARI
Record length/
Chart frequency
1933-2006; chart frequency varies (charts were compiled every 10 days during the navigation season and monthly for the rest of the year over most of the time series)
Format SIGRID-1 and EASE-Grid
Data available
from NSIDC?
Yes. The Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006 data set is publicly available.
NSIDC reference number G02176
Notes There is a data gap between 1993 and 1996.
Great Lakes
Originator U. S. National Ice Center, Canadian Ice Service
Record length/
Chart frequency
1973-74 ice season to present; frequency varies per year throughout the ice season
Format Most files are available in GIF format
Data available
from NSIDC?
Yes. The Great Lakes Ice Charts data set is available.
NSIDC reference numbers G00486, FD0055
Gulf of Newfoundland, Hudson Bay, Arctic
Originator Canadian Ice Service
Record length/
Chart frequency
1962-1982, 1962-1983, 1959-1980
Format SIGRID-1
Data available
from NSIDC?
No.
NSIDC reference numbers FD168, rcvd 1992, 1998
Notes No plans to distribute.
Sea of Okhotsk
Originator Japan Meteorological Agency
Record length/
Chart frequency
1971-last ice season, every five days
Format SIGRID-1,2
Data available
from NSIDC?
No.
NSIDC reference numbers FD042
Notes NSIDC plans to convert this data set to EASE-Grid before distribution.
Various
Originator Argentina, Canada, Japan, U.S., and USSR
Record length/
Chart frequency
1982
Format SIGRID-1
Data available
from NSIDC?
No.
NSIDC reference numbers FD111, rcvd 1989
Notes SIGRID Global Sea Ice Data bank Test Tape. No plans to distribute.