Besides occurring on the opposite side of the globe, Antarctic sea ice differs from Arctic sea ice in a couple of respects. First, the Arctic is an ocean basin largely surrounded by land whereas...

Guest post by Mark Serreze, NSIDC Director and Professor, Department of Geography, University of Colorado Boulder

Over the course of the satellite record, Arctic sea ice extent has declined. Declines have been observed throughout the year, but they have been most pronounced at the time of the annual minimum...

On July 20, 2011, the U.S. Coast Guard Cutter Healy traveled through a break in the sea ice and melt ponds in...

Like El Niño and La Niña, the Arctic Oscillation (AO) is a big-picture of atmospheric conditions that influence weather. The AO, which alternates between two distinct modes, describes how pressure...

Researchers take measurements of the physical properties of sea ice in Fram Strait, in the Canadian Arctic...