Abtauung

Abtauung is a German term that translates to "thawing" or "defrosting." In a general context, it refers to the process of a frozen substance returning to a liquid state due to an increase in temperature. This can apply to ice, snow, or frozen food.

In the context of climate change, "Abtauung" is often used to describe the melting of glaciers, ice sheets, and permafrost. The thawing of permafrost, in particular, is a significant concern. Permafrost is ground that has been frozen for at least two consecutive years. When permafrost thaws, it can release large amounts of stored greenhouse gases, such as methane and carbon dioxide, into the atmosphere. This creates a feedback loop, where the released gases contribute to further warming and more thawing.

The thawing of permafrost can also have implications for infrastructure built on it, such as roads, buildings, and pipelines. As the ground thaws and becomes unstable, these structures can be damaged. Furthermore, the thawing of permafrost can alter ecosystems, affecting vegetation, wildlife, and water cycles. The rate and extent of Abtauung are closely monitored by scientists to understand and predict its global impacts.