Yesterday was and today will be another day of dipping ocean sensors in cracks through the Petermann ice shelf into the ocean. We are learning about ocean currents, temperatures, and salinities; all these are important for understanding ice melt at the ice-ocean interface.
Prior work using satellite remote sensing has shown that Petermann melts much more from its floating base than from the surface. We’re finding cracks and holes all over the ice shelf surface with which to map the sub-glacial oceanography.
Jason E. Box
Byrd Polar Research Center
guest scientist on Greenpeace ship Arctic Sunrise