Scientists are using AI to track permafrost thaw as Arctic lakes vanish in hours

Permafrost, ground that remains frozen for at least two consecutive years, is prevalent in Alaska and is causing significant environmental changes due to rising temperatures. When permafrost thaws, it leads to the formation of thermokarst ponds, which are depressions filled with water. These ponds are easily visible in satellite imagery and can indicate the extent of permafrost thaw.

When a lake vanishes overnight, it is often an indication that the ice-rich permafrost has thawed, leading to substantial property damage as the land sinks. Scientists have developed an interactive website to monitor permafrost thaw in near-real time across the Arctic, using the unique feature of thermokarst ponds. This allows them to analyze satellite images and track the changes in permafrost landscapes over time.

In particular, the Seward and Baldwin peninsulas in northwestern Alaska have experienced significant lake drainage in recent years, suggesting ongoing permafrost thaw. While not all changes in lakes are caused by permafrost thaw, such as variations due to snowmelt and wildlife activity, near-real-time data is crucial for researchers and communities to adapt their plans accordingly.