Ground temperatures have increased in recent decades and permafrost thawing has already begun. As temperatures continue to warm, permafrost will continue to thaw and melt.

The image to the right shows how permafrost in northwestern Alaska could change by the year 2100.

 

When permafrost melts, the land above it sinks or changes shape, which can cause extensive damage to cities and ecosystems. Monitoring melting permafrost can allow for preparation before the worst of damage. 

 

Another reason to be concerned by permafrost is the vast amounts of carbon stored inside. As permafrost thaws, this carbon is released to the atmosphere in the form of methane, a powerful greenhouse gas.     Source: EPA.