A walk across Alaska’s Arctic sea ice brings to life the losses that appear in climate data
- Written by Alexandra Jahn, Associate Professor of Atmospheric, Oceanic and Arctic Sciences, University of Colorado Boulder

As I walked out onto the frozen Arctic water off Utqiagvik, Alaska, for the first time, I was mesmerized by the icescape.
Piles of blue and white sea-ice rubble several feet high gave way to flat areas and then rubble again. The snow atop it,...