Florian Möllers / Arctic expedition cruiseship M/S Stockholm in heavy sea and gale winds at Sarkapp (South Cape), Svalbard, Norway, July 2012

David Tipling / Kapitan Klebnikov, an ice breaker, growing through ice in the Weddell Sea near Snow Hill Island, Antarctica, November 2006

David Tipling / Emperor Penguins on sea ice with Kaptan Klebnikov ice breaker in background, Snow Hill Island, Antarctica, November

Jeff Wilson / Royal Navy ship, HMS Endurance, crashing through the waves in the south atlantic ocean, Antarctica, November 2009. Taken on location for the BBC series, Frozen Planet.

Bryan and Cherry Alexander / Tourists on icebreaker "Professor Multanovskiy" watching Polar bear (Ursus maritimus) in pack ice. Svalbard, Norway, 2004.

Eric Baccega / View from deck of a cruise ship cruising along Baffin Island with an iceberg emerging out ot the mist, Nunavut, Canada, August 2010

Florian Möllers / Bearded seal (Erignathus barbatus) resting on ice-floe and Expedition cruise ship M/S Stockholm close to Lamoteoya, Svalbard, Norway, July 2012

Florian Möllers / Norwegian flag set on M/S Stockholm and ice front of Brasvellbreen seen from crow's nest, Austfonna, Nordaustlandet, Svalbard, Norway, July 2012

Florian Möllers / Expedition cruiseship M/S Stockholm cruising through drift ice next to Brasvellbreen glacier, Austfonna, Nordaustlandet, Svalbard, Norway, July 2012

David Tipling / Tourist helicopter taking off from heli-deck of ice-breaker, on route to Snow Hill Island Emperor Penguin colony, Weddell Sea, Antarctica, November 2006

Kerstin Hinze / Ship breaking through sea ice. North Sea, Wadden Sea, Germany, February 2012.

Kerstin Hinze / Ship breaking through sea ice. North Sea, Wadden Sea, Germany, February 2012.