40 Years of Pervasive Glacier Retreat Across Svalbard

Nature Communications, 15 January 2025

Norway’s northernmost archipelago, Svalbard, is the most rapidly warming region of the Arctic and experiences frequent climate extremes. Using AI to map changes in glacier fronts, researchers examined how glaciers in Svalbard have changed since 1985. They found that ocean temperatures had a large impact on peak seasonal retreat rates, which typically occur in August and September before the ice re-advances during winter. Once seasonal variability was removed, the researchers showed that pervasive glacier retreat has occurred over the past 38 years in Svalbard. All non-surging glaciers lost over 800 km2 in area at the calving front over the past four decades, equivalent to an annual rate of almost 24 km2 area lost per year. The study makes clear that regional glacier models must adequately include the strong role of the ocean to better understand past trends, and anticipate future ice loss and sea-level rise from Arctic glaciers.

Full paper: https://doi.org/10.1038/s41467-025-55948-1