Arctic Ocean, May 2016

Traveling over the frozen ocean

Measuring temperature in an ice core

Using an electromagnetic induction sensor to measure thickness

Our group near a large sea ice lead

Arctic Ocean, June 2007

Drilling a hole to measure ice thickness

Snowmachines next to a melt pond

With bear guard

Don Perovich measuring albedo (reflectiveness)

Hajo Eicken and crew removing instruments frozen into ice

Subtropical Pacific Ocean, September 2005

Releasing Niskin carousel/CTD profiler from SSV Robert Seamans

On deck of SSV Seamans

In SSV Seamans galley


Teton Range of Rocky Mountains, Wyoming

Tunnel through 35,000-year-old permafrost, Alaska