View sequential still images of thermokarst (thawed permafrost) at Horn Lake in northern Alaska during the summer of 2010. The video was made by researchers studying the responses of Arctic landscapes to permafrost degradation.
CTD Data plots from the Winter Sampling Expedition. CTD is an acronym for Conductivity-Temperature-Depth. It is a device that measures the salinity, temperature, depth in a vertical profile from the surface. The data comes from the Chukchi Sea.