NOTICE: Starting 04 October 2021, USNIC will be revising the Arctic Weekly Hemispheric Analysis. Ice thickness characterization egg codes 7 (Thin First Year Ice), 4-Dot (Medium First Year Ice), and 1-Dot (Thick First Year Ice) will be characterized as 6 (First Year Ice). Further characterization will be available for Tailored Support based on customer mission requirements.


Arctic Sea Ice at Minimum Extent 2021
Weekly Hemispheric Update

With the Arctic Weekly Hemispheric Analysis change for all First Year Ice to Egg Code 6, the codes are defined as follows:

World Meteorological Organization Standard Thickness References

Egg Code 6 is First Year Ice (>30 cm)
Egg Code 7 is Thin First Year Ice (30 - 70 cm)
Egg Code 1-Dot is Medium First Year Ice (70-120cm)
Egg Code 4-Dot is Thick First Year Ice (>120 cm)

Press Release

Arctic Sea Ice at Minimum Extent - 2021

Press Release

Newly named iceberg, Iceberg A-78, calves from Jelbart Ice Shelf.

Press Release

IMS data will now be available in NetCDF format for 1km and 4km grids

Press Release

Newly named iceberg, Iceberg A-77, calves from Ekstrom Ice Shelf.

Regional Synopsis

The U.S. National Ice Center has developed a new series charts. Regional Synopsis charts breaks out each region of the Arctic and Antarctic into a high quality regional charts along with an environment synopsis write-up. Charts will be updated weekly. Please take a look.

IMS Resource

Added IMS Conference Materials to IMS Information resource page. Take a look.

Press Release

The 2021 maximum Arctic sea ice extent occurred on 10 March 2021.

Antarctic Ice Shelf

Antarctic ice shelf is available in GIS shapefile format.

Product Catalog

Looking for a product or details on one. Check out our product catalog.

Animated Charts

Added animated charts of our Arctic and Antarctic MIZ, and IMS snow and ice charts.

Trivariate Products

A comprehensive look at ice conditions over a period time, from a single year to a comparison set starting from 2007. Produced for the Arctic and Antarctic.

Blue Swirl Image
Icon with up arrow to indicate scroll up.