Towards critical white ice conditions in lakes under global warming
The quality of lake ice is of uppermost importance for ice safety and under-iceecology, but its temporal and spatial variability is largely unknown. Here weconducted a coordinated lake ice quality sampling campaign across theNorthern Hemisphere during one of the warmest winters since 1880 and showthat lake ice during 2020/2021 commonly consisted of unstable white ice, attimes contributing up to 10