Pearl Creek Elementary School (Fairbanks) had the oldest permafrost station in our network.
We compare difference between 2006 and 2007 dataset at the multi-age classroom.

We re-visit Pearl Creek Elementary School today. This is third visiting for us and already full two year data collected from here. Students are well understand permafrost, especially multi-age class works great for teach each other.
After we read frost depth using frost tube, we cloth looked two years data and discuss difference between 2006 and 2007.

The students from Randy Smith Middle School visit their permafrost (frost tube) monitoring site to read the depth of the ground freezing!

Frost tube is great way to monitoring seasonal frost layer. It is easy to make just corored water fill in the clear tube. Whatever the ice formed, ice does not include color. the bounday of color and clear is bounday of freezing front!