Age range: 13 - 19
Resource type: video
Author: Paul Eric Aspholm
Palsas are a type of natural frost heave occurring around permafrost land. Palsas are melting due to warming and are disappearing in many places. In this webinar we will discuss why that may have consequences in the subarctic region and what the palsas tell us. Palsas are created in bogs covered with peat. They consists of a frozen core of ground material and water covered by peat soil. The peat insulates the palsas so they do not melt in the summer. The core of the palsa is permanently frozen but will change size and shape through time as palsas respond to climate changes, the direction of the wind, how and when rain and snow fall, etc. Enrol and learn why such a rare nature type can be an important indicator for climate.
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