Eric Baccega / Female Harp seal (Phoca groenlandicus) surfacing at breathing hole looking at her pup, Magdalen Islands, Gulf of St Lawrence, Quebec, Canada, March.

Sue Flood / Aerial view of sea ice floe breaking up in summer, Admiralty Inlet, Canadian High Arctic, June 2000

DOC WHITE / Ice floes and mountains, northern Baffin Island, Canadian Arctic

Jurgen Freund / Looking up at silhouette of Diver under ice. Magdalen Islands, Atlantic, Canada

Doug Allan / Icicles on pack ice melting, Canadian Arctic

Staffan Widstrand / Bylot island, Baffin islands, melting sea ice in spring, Canad

Doug Allan / Aerial view of sea ice melting, creating patterns over spring sea surface, Lancaster sound, Canadian Arctic

Jurgen Freund / Harp Seal (Pagophilus groenlandica) juvenile under pack ice. Magdalen Islands, Canada

Rick Price / Polar bear (Ursus maritimus) on an iceberg, Baffin Bay, Canada. September.

Rick Price / Polar bear (Ursus maritimus) on an iceberg, Baffin Bay, Canada. September.

Pal Hermansen / Panoramic of the Tanquary Fjord, Ellesmere Island, Nunavut, Canada, August 2007.

Jurgen Freund / Juvenile Harp seal (Pagophilus groenlandicus) in water, split level, Magdalen Islands, Quebec, Canada.

Ingo Arndt / Helicopter landing bringing tourists to see Harp seals (Phoca groenlandicus) on sea ice, Magdalen Islands, Canadian Arctic, Gulf of St Lawrence, Quebec, Canada, March 2013.

Todd Mintz / Semipalmated plover (Charadrius semipalmatus) calling to lead predators away from nest, Grise Fiord, Ellesmere Island, Nunavut, Canadian Arctic, March

Eric Baccega / Crack in the pack ice, Manson Icefield peninsula and Jakeman glacier, Ellesmere Island, Nunavut, Canada, June 2012

Eric Baccega / Cone Island, seen from the floe edge off Ellesmere Island, Nunavut, Canada, June 2012.

Eric Baccega / Smith Island, seen from the floe edge off Ellesmere Island, Nunavut, Canada, June 2012.

Eric Baccega / Morraine Lake, in the Valley of the Ten Peaks, Banff National Park, Alberta, Canada.

Eric Baccega / Morraine Lake, in the Valley of the Ten Peaks, Banff National Park, Alberta, Canada.

Eric Baccega / Morraine Lake, in the Valley of the Ten Peaks, Banff National Park, Alberta, Canada.

Chadden Hunter / Travelling across Northern Canada on skidoo, Arctic circle, Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Travelling across Northern Canada on skidoos, Arctic circle, Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Sunset over Northern Canada landscape, taken on location for BBC Frozen Planet series, 2009

Bryan and Cherry Alexander / Illustration of Benjamin Franklin's 1825-1827 expedition to Richards Island, Canadian Arctic Islands, Canada.

Eric Baccega / View from deck of a cruise ship cruising through Sunshine Fjord, Baffin Island, Nunavut, Canada, August 2010

Eric Baccega / Hantzch Island in fog, viewed from the south of Baffin Island, Nunavut, Canada, August 2010

Brandon Cole / Harp Seal (Phoca groenlandica) head portrait of "whitecoat" newborn pup. Magdalen Islands, Canadian Arctic.

Jenny E. Ross / Aerial view of ice conditions between Prince Edward Island and the Magdalen Islands in the Gulf of St. Lawrence, . Due to warmer-than-normal ambient temperatures during the winter of 2005-2006, sea i...

Jenny E. Ross / Aerial view of ice conditions between Prince Edward Island and the Magdalen Islands in the Gulf of St. Lawrence, . Due to warmer-than-normal ambient temperatures during the winter of 2005-2006, sea i...

Eric Baccega / Aerial view of Mackenzie delta in winter, North West Territories, Canada April 2010

Eric Baccega / Aerial view of Mackenzie delta in winter, North West Territories, Canada April 2010

Eric Baccega / Aerial view of Mackenzie river and delta in winter, North West Territories, Canada April 2010

Eric Baccega / Portrait of a young inuit girl, Banks Island, North West Territories, Canada April 2010

Uri Golman / Photographer Uri Golman photographing Arctic Hare (Lepus Arcticus Groenlandicus) North East Greenland, Arctic. February 2009.

Uri Golman / Aerial view of the pack / sea ice, breaking up and melting. Iles de la Madeleine, Magdalen Island, St. Lawrence, Canadian Arctic. March 2008.

Uri Golman / Aerial view of the pack / sea ice, breaking up and melting. Iles de la Madeleine, Magdalen Island, St. Lawrence, Canadian Arctic. March 2008.

Bryan and Cherry Alexander / Greely's hut ruin (1883) on land between lake and bay. Pim Island, Ellesmere Island, Nunavut, Canada.

Bryan and Cherry Alexander / Washed away Ward Hunt Ice shelf around Ward Hunt Island. Ellesmere Island, Nunavut, Canada, 1994.

Bryan and Cherry Alexander / Washed away Ward Hunt ice shelf around Ward Hunt Island. Ellesmere Island, Nunavut, Canada, 1994.

Bryan and Cherry Alexander / Containers of supplies being unloaded from a barge during sealift at Cape Dorset. Baffin Island, Nunavut, Canada, 2002.

Bryan and Cherry Alexander / Boats in the harbour at Qikiqtarjuaq (Broughton Island) off the east coast of Baffin Island. Nunavut, Canada, 2002.

Sue Flood / Cameraman Doug Allan filming on location, Canadian Arctic, June 2002

Sue Flood / Cameraman Doug Allan on radio to Polar Shelf during rescue from ice floe, Canadian Arctic, June 2000

Warwick Sloss / Snow blowing over rocks, sunset. Canadian arctic

David Noton / Pack Ice, Alexandra Fjord, Ellesmere Island, Canada

David Noton / Alexandra Fjord, Ellesmere Island, Canadian Arctic

David Noton / Alexandra Fjord, Ellesmere Island, Canada

David Noton / Alexandra Fjord, Ellesmere Island, Canada