"We're running gliders every year since 2013 from the Bering Strait all the way up to Barrow Alaska, that's like this 1800 km transect, just developing this time-series of acoustics. It's like we're eavesdropping on climate change because the marine mammals are incredible integrators of the ecosystem and now, we've got an incredible time-series to investigate how they respond." Hank Statscewich, Researcher at College of Fisheries and Ocean Sciences Institute of Marine Science in Alaska.