Ice cores are valuable archives of past climate and environmental conditions, and they help us better understand the behavior of the Earth system.
I've been lucky enough to participate in a number of ice core projects over the years, including:
WAIS Divide, West Antarctica (2009-2010)
Mt. Waddington, British Columbia, Canada (2010)
Roosevelt Island, Antarctica (2012-2013)
Taylor Glacier, Antarctica (2015-2016)