The 'whirlpool' and crack at 80˚57'28" N and 061˚20'10" W on the Petermann glacier. Geophysicist Dr Richard Bates, of the Scottish Oceans Institute at the University of St. Andrews, at right, takes 'casts' of tempearture pressure current and salinity. He is assisted by ice logistician Eric working on board the Greenpeace ship Arctic Sunrise in Petermann Fjord, northwest Greenland. Dr Bates makes casts -dropping a CTD probe (Conductivity Temp Depth) into the pool and pulling it back up at a slow speed.
© Greenpeace / Nick Cobbing