In the past 15 years, climate change has transformed the Arctic
The pace of change has surprised researchers who launched the annual report card in 2006

With remote sensing instruments similar to those used in satellites, MOSAiC gives up-close measurements of the thickness and composition of Arctic snow and ice. In late 2019, the mission embedded a boat in an ice floe for an unprecedented yearlong expedition.
Steffen Graupner/Alfred-Wegener-Institut (CC-BY 4.0)