Glaciologist Dr Jason Box gathers samples of cryocronite from the lower section of the Petermann glacier. Previous samples taken from other glaciers in Greenland have contained traces of lead and cadmium.

Glaciologist Dr Jason Box adjusts his remote time-lapse cameras which are trained across Petermann Glacier.

The route followed by the Arctic Sunrise during the 2009 Arctic Impacts expedition.

Holes containing cryocronite deposits visible in the bed of a melt water lake on the Petermann glacier in north Greenland. The surface of the glacier is covered with pot holes like these, which are often perfectly circular to the eye.

The Arctic Sunrise reaches 'the ice bridge' in the Robeson channel, at 82.4 North, near the border between Greenland and Canada.

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, takes 'casts' of tempearture pressure current and salinity.

Dr Jason Box gathers samples of cryocronite from the lower section of the Petermann glacier. Cryocronite is the term used to describe a collection of impurities which gather on the surface of the ice.