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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.
ArcticGreenland SeaBaltic 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. |
