Staffan Widstrand / Brunnich's Guillemot (Uria lomvia) stretching wings and calling on small ice floe, Svalbard, Norway, July

Staffan Widstrand / Coastal ice, Svalbard, Norway, July 2011

Todd Mintz / Iceberg dive, diver next to ice floe, Pond Inlet, Baffin Island, Nunavut, Canada, June

Staffan Widstrand / Ice breaking up around the coast, Svalbard, Norway, July 2011

Staffan Widstrand / Walrus (Odobenus rosmaris) small group resting on ice floe, Svalbard, Norway, July

Staffan Widstrand / Abstract ice formation, like whale's tail, in coastal waters, Svalbard, Norway July 2011

Staffan Widstrand / Ice berg near coastline, Svalbard, Norway July 2011

Staffan Widstrand / Walrus (Odobenus rosmaris) group resting on ice floe, Svalbard, Norway

Staffan Widstrand / Kittiwakes (Rissa tridactyla) resting on a ice berg, Svalbard, Norway July

Staffan Widstrand / Kittiwakes (Rissa tridactyla) resting on a iceberg, Svalbard, Norway July

Todd Mintz / Iceberg dive, diver next to ice floe, Pond Inlet, Baffin Island, Nunavut, Canada, June

Todd Mintz / Iceberg dive, diver next to ice floe, Pond Inlet, Baffin Island, Nunavut, Canada, June

Steven Kazlowski / Photographers travel via a steel hull sailboat to circumnavigate the Svalbard Archipelago in summertime, Norway, July 2011

Steven Kazlowski / Polar bear (Ursus maritimus) adult on an ice floe along Spitsbergen and the northwest coast of the Svalbard Archipelago, Norway, Greenland Sea, July

Steven Kazlowski / Polar bear (Ursus maritimus) perches atop an ice floe along Spitsbergen and the northwest coast of the Svalbard Archipelago, Norway, Greenland Sea, July

Steven Kazlowski / Polar bear (Ursus maritimus) perches on ice floe along Spitsbergen and the northwest coast of the Svalbard Archipelago, Norway, Greenland Sea, July

Steven Kazlowski / Chunks of Columbia Glacier, one of the fastest moving glaciers in the world, retreating since the early 1980s, litter the shore in Chugach National Forest, Prince William Sound, Alaska, USA. The Colum...

Steven Kazlowski / Sea otter (Enhydra lutris) grooms itself in icy waters off Columbia Glacier in Prince William Sound, Chugach National Forest, Alaska, USA, May

Steven Kazlowski / Scenic icy landscape view of Columbia Glacier, one of the fastest moving glaciers in the world, Chugach National Forest, Prince William Sound, Alaska, USA. The Columbia Glacier is now the single large...

Steven Kazlowski / Bearded seals (Erignathus barbatus) cow and calf rest on sea ice floating off Spitsbergen and the northwest coast of the Svalbard Archipelago, Norway, Greenland Sea, July

Steven Kazlowski / Scenic icy landscape view of Columbia Glacier, one of the fastest moving glaciers in the world, Chugach National Forest, Prince William Sound, Alaska, USA. The Columbia Glacier is now the single large...

Flip Nicklin / Gentoo Penguin (Pygoscelis papua) porpoising among icefloes, Antarctica

David Noton / Pack Ice on Alexandra Fiord, Ellesmere Island, Canadian Arctic

Doug Allan / Midnight sun over Spring pack ice, Lancaster Sound, Canadian Arctic, Canada

Sue Flood / Aerial of sea ice near coast Admiralty Inlet, Baffin Island, Canadian High Arctic, June 2000

Sue Flood / Aerial of sea ice showing some meltwater, Admiralty Inlet, Canadian High Arctic, June 2000

Sue Flood / Jones Sound, Canadian High Arctic, June 1999

Doug Allan / Chinstrap penguins on iceberg {Pygoscelis antarctica} off Zavodovski Island, South Sandwich Islands, Antarctica

Doug Allan / Aerial view of melting pack ice in spring, Canadian Arctic

Doug Allan / The cliffs and sea ice of Admiralty Inlet in late spring, sea ice melting, Canadian Arctic

Doug Allan / Aerial view of sea ice breaking up in late Spring, Lancaster Sound, Canada Arctic

Doug Allan / Aerial view of sea ice breaking up in late Spring, Lancaster Sound, Canada Arctic

Jeff Turner / White Arctic race female Grey wolf (Canis lupus) leaping across melting ice floes, Ellesmere Island, Canada. Wild

Flip Nicklin / Icefloes and coastline, Antarctica