Historical Sea Ice Atlas

Is sea ice a part of your work, your travel, and/or your lifestyle?

We’ve compiled sea ice data from northern Alaska—from whaling-ship logbooks to data acquired from satellites—to show how sea ice concentrations have changed since 1850.

Choose a location and a year of interest (1850–present) and see what the sea ice looked like: where was it found most often, and least often, throughout the year?

You can also see the data displayed in poster format and as video animations.

Graphic and data downloads available.

Explore how sea ice conditions are changing

Tool Details

Created by:

  • Alaska Center for Climate Assessment and Policy (ACCAP)
  • Scenarios Network for Alaska + Arctic Planning (SNAP)


  • International Arctic Research Center (IARC)

Funded by:

  • Alaska Ocean Observing System (AOOS)
  • National Oceanic & Atmospheric Administration (NOAA)