This material is based upon work supported by the National Science Foundation under Grant No. 0732835. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Ice Worlds is a production of Evans & Sutherland, the Houston Museum of Natural Science, and the University of New Hampshire.

First Time Users

Can't see the images or things look messy?

Firefox users: If the SEAICEBOX images are cut off or lines appear in the page while you are using the tools, you can fix that: Go to View in the menu and click on Zoom Out. If the tools overlap each other, click Zoom Out.

SEAICEBOX requires JAVA to run. Click here to install JAVA.

What is Percent Concentration and Sea Ice Extent?

Percent concentration is the amount of the ocean surface covered by sea ice in each pixel of the satellite image. To determine the extent of sea ice, a pixel is considered ice if it has at least 15% ice concentration.

Try out your knowledge! Move your cursor over the pictures to the left to see the image caption. Which pictures contain sea ice? About how much of the surface is covered by sea ice in each?

First Time Users

Can't see the images or things look messy?

What is Percent Concentration and Sea Ice Extent?

Watch Our Help Video on Using Seaicebox.

SEAICEBOX Quick Tutorial in Powerpoint (will open in a new window)

More Information and Sample Activities are on the Resources Page.