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The monthly Sea Ice Index provides a quick look at Arctic-wide changes in sea ice. It is a source for consistently processed ice extent and concentration images and data values since 1979. Monthly images show sea ice extent with an outline of the 30-year (1981-2010) median extent for that month (magenta line).
- Compare & Animate
Tips for using the sea ice animation tool Use the dropdown...
- Data Archive
The Sea Ice Index archive contains the following: Monthly...
- FAQS
For example, in 2012 using Sea Ice Index Version 1, the...
- Sea Ice Index, Version 3
The Sea Ice Index provides a quick look at Arctic- and...
- Compare & Animate
30 wrz 2024 · Each point represents the monthly average sea ice extent. Years in the current decade are highlighted in red, with the current year highlighted in black.
Monthly average sea ice extent for (a) March 2022, and (b) September 2022. The median extent for 1991-2020 is shown by the magenta contour. Sea ice age. Sea ice age is a proxy for ice thickness because multiyear ice thermodynamically grows thicker through successive winter periods.
Monthly average sea ice extent for (a) March 2021, and (b) September 2021. The median extent for 1981-2010 is shown by the magenta contour. Sea ice age. Sea ice drifts around the Arctic Ocean, forced by winds and ocean currents, growing and melting thermodynamically.
Monthly average sea ice extent (light blue) for (a) March 2023, and (b) September 2023. The median extent for 1991-2020 is shown by the dark blue contour.
31 paź 2024 · Sea ice analysis tool. The Sea Ice Analysis Tool allows users to analyze monthly-averaged or daily sea ice extent and concentration via interactive maps. In addition, users can plot monthly ice extent anomalies, map sea ice concentration anomalies, and display images of trends in sea ice concentration, all for a variety of date, climatology ...
The Sea Ice Index provides a quick look at Arctic- and Antarctic-wide changes in sea ice. It is a source for consistent, up-to-date sea ice extent and concentration images, in PNG format, and data values, in GeoTIFF and ASCII text files, from November 1978 to the present.