Scientists work inside a rift that has formed inside a glacier. They drill a hole through the ice then drop a probe into the water below. This contains measuring equipment to ascertain salinity and temperature over depth. The Greenpeace ship Arctic Sunrise, its crew and a team of independent scientists are at Nioghalvfjerdsfjorden Glacier (known as '79 Glacier') at 79 degrees north, in remote northeast Greenland, to study the effects of climate change in the Arctic, and its influence on sea level rise worldwide.