Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group on icefloe in Hope Bay, Antarctic Peninsula, Antarctica

Gerry Ellis / Research refuse on Danco Island, west coast Antarctic Peninsula, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group on pack ice, Paulet Island, Weddell Sea, Antarctica

Matthias Breiter / Female canoeist on Hudson Bay among pack ice, Churchill, Manitoba, Canada

Konrad Wothe / Crabeater Seal (Lobodon carcinophagus) resting on ice, Paradise Bay, Antarctica

Jim Brandenburg / Ice floes, Ellesmere Island, Nunavut, Canada

Flip de Nooyer / Leopard Seal (Hydrurga leptonyx) on ice floe, Europe

Konrad Wothe / Polar Bear (Ursus maritimus) on ice field, Churchill, Manitoba, Canada

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group resting on ice floe near rookery, Possession Island, Ross Sea, Borchgrevink Coast, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group on ice floe being passed by an Icebreaker, Possession Island, Ross Sea, Antarctica

Tui De Roy / Ice floe and mountains, Paradise Bay, Antarctic Peninsula, Antarctica

Tui De Roy / Ice floe and mountains, Paradise Bay, Antarctic Peninsula, Antarctica

Flip Nicklin / Bearded Seal (Erignathus barbatus) on ice floe, Norway

Tui De Roy / Ice floe in southern Greenland Fjord, late summer, Prins Christian Sound, Greenland

Tui De Roy / Ice floes in evening light, Spitsbergen Island, Svalbard Archipelago, Norway

Michio Hoshino / Spotted Seal (Phoca largha) resting on ice floe, Alaska

Jim Brandenburg / Arctic Wolf (Canis lupus) on ice floe, Ellesmere Island, Nunavut, Canada

Flip Nicklin / Bearded Seal (Erignathus barbatus) on ice floe, Norway

Tui De Roy / Tabular icebergs among broken fast ice, Prince Olav Coast, east Antarctica

Tui De Roy / Fog bank hugging foot of icy mountains, Gerlache Strait, Antarctic Peninsula, Antarctica

Tui De Roy / Summer pack ice floating in Barents Sea, south of Svalbard Archipelago, Norway

Tui De Roy / Broken fast ice, under impending midnight storm, Edward VIII Bay, Kemp coast, east Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) crowding on melting summer ice floe, Possession Island, Ross Sea, Antarctica

Tui De Roy / Crabeater Seal (Lobodon carcinophagus) group hauled out on ice floe, Peterman Island, Antarctica Peninsula, Antarctica

Tui De Roy / Bearded Seal (Erignathus barbatus) resting on ice floe, Kongsfjorden, Spitsbergen, Svalbard, Norwegian Arctic

Flip Nicklin / Bearded Seal (Erignathus barbatus) resting on ice floe, Norway

Norbert Wu / Adelie Penguin (Pygoscelis adeliae) above and below water orcas-eye view of group on ice floe that has split off of ice edge, McMurdo Sound, Antarctica

Norbert Wu / Sea ice splits to reveal long leads in summer, opening passages for marine life to travel, McMurdo Sound, Antarctica

Flip Nicklin / Leopard Seal (Hydrurga leptonyx) reclining on ice floe, Antarctica

Jim Brandenburg / Arctic Wolf (Canis lupus) leaping onto ice floe, Ellesmere Island, Nunavut, Canada

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group crowding on melting summer ice floe, Possession Island, Ross Sea, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group crowding on melting summer ice floe, Possession Island, Ross Sea, Antarctica

Tui De Roy / Sea ice, pancake ice forming between older floes, Cape Adare, Borchgrevink Coast, Antarctica

Tui De Roy / Sea ice break-up, aerial view, Transantarctic Mountains, New Harbour, McMurdo Sound, Ross Sea, Antarctica

Flip Nicklin / Bearded Seal (Erignathus barbatus) adult male, on ice floe

Flip Nicklin / Iceberg and ice floes, Baffin Island, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) on ice floe with reflection in water, Ellesmere Island, Nunavut, Canada

Martha Holmes / Leopard seal (Hydrurga leptonyx) hauled out on ice floe, Antarctica

Hiroya Minakuchi / Sea ice, Weddell Sea, Antarctic Peninsula, Antarctica

Konrad Wothe / Harbor Seal (Phoca vitulina) group on ice floe, Alaska

Norbert Wu / Crabeater Seal (Lobodon carcinophagus) group on ice floe, Antarctic Peninsula, Antarctica

Norbert Wu / Leopard Seal (Hydrurga leptonyx) on ice floe, Antarctic Peninsula, Antarctica

Norbert Wu / Crabeater Seal (Lobodon carcinophagus) pair on ice floe near coast, Palmer Station, Antarctic Peninsula, Antarctica

Colin Monteath / Museum, an old english military base, at sunset, Port Lockroy, Wiencke Island, Antarctic Peninsula, Antarctica

Colin Monteath / Lemaire Channel reflection at sunset, Antarctic Peninsula, Antarctica

Hiroya Minakuchi / Ice floes and icebergs, Antarctica

Kevin Schafer / Ice floes, Svalbard, Norway

Michio Hoshino / Ice floes in Yukon River in spring, Alaska

Colin Monteath / Newly formed sea ice rafting together to form ice floes, McMurdo Sound, Ross Sea, Antarctica

Colin Monteath / Newly formed sea ice rafting together to form ice floes, McMurdo Sound, Ross Sea, Antarctica

Colin Monteath / Ice floes, northern Ross Sea, Antarctica

Colin Monteath / Pack ice, northern Ross Sea, Antarctica

Colin Monteath / Ice floes at sunset near Mertz Glacier, east Antarctica

Colin Monteath / Ice floes at sunset near Mertz Glacier, east Antarctica

Yva Momatiuk & John Eastcott / Floating ice floes and blue tabular iceberg sculpted by waves and melting action accelerated by global warming and climate change, near South Georgia Island

Jan Vermeer / Ice floes showing significant amount of ice beneath the water, Antarctica

Jan Vermeer / Ice floe seen from the Russian icebreaker Kapitan Khlebnikov, Scotia Sea, Antarctica

Jan Vermeer / Jellyfish near an ice floe, Paradise Bay, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) groups on ice floes, Southern Thule, South Sandwich Islands, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) group on ice floes, Southern Thule, South Sandwich Islands, Antarctica

Konrad Wothe / Bearded Seal (Erignathus barbatus) on ice floe, Spitsbergen, Norway

Theo Allofs / Adelie Penguin (Pygoscelis adeliae) getting ready to jump into water, Paulet Island, Antarctica

Theo Allofs / Adelie Penguin (Pygoscelis adeliae) on ice floe, Paulet Island, Antarctica

Theo Allofs / Adelie Penguin (Pygoscelis adeliae) pair on ice floe, Paulet Island, Antarctica

Theo Allofs / Adelie Penguin (Pygoscelis adeliae) pair on ice floe, Paulet Island, Antarctica

Flip de Nooyer / People in inflatable boat in icy seas, Trinity Island, Antarctica

Flip Nicklin / Bearded Seal (Erignathus barbatus) diving off of ice floe, Norway

Flip Nicklin / Bearded Seal (Erignathus barbatus) resting on ice floe, Svalbard, Norway

Flip Nicklin / Bearded Seal (Erignathus barbatus) pup on ice floe, Norway

Flip Nicklin / Bowhead Whale (Balaena mysticetus) surfaceing near camp, Arctic

Flip Nicklin / Cruise ship nears edge of glacier, southeast Alaska

Ingo Arndt / Emperor Penguin (Aptenodytes forsteri) group courting on ice floe, Weddell Sea, Antarctica

Ingo Arndt / Emperor Penguin (Aptenodytes forsteri) group courting on ice floe, Weddell Sea, Antarctica

Patricio Robles Gil / Adelie Penguin (Pygoscelis adeliae) group and icebergs in low tide, Antarctica Peninsula, Antarctica

Colin Monteath / Sunset on ice floe, Pleneau Island, Antarctica Peninsula, Antarctica

Colin Monteath / Iceberg and pack ice at dawn, Dumont d'Urville, Terre Adelie Land, east Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) crowding on melting summer ice floe, Possession Island, Ross Sea, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group resting on ice floe by tabular berg, Antarctic Sound, Antarctic Peninsula, Antarctica

Mitsuaki Iwago / Crabeater Seal (Lobodon carcinophagus) trio resting on ice float, Antarctica

Mitsuaki Iwago / Adelie Penguin (Pygoscelis adeliae) group on floating iceberg in front of ice shield, Antarctica

Flip de Nooyer / Leopard Seal (Hydrurga leptonyx) calling on ice floe, Antarctica

Flip de Nooyer / Sailboat avoiding broken ice, Mt Cloos of the Antarctic Peninsula on the left and Wandel Peak of Booth Island on the right, Lemaire Channel, Antarctica

Flip de Nooyer / Antarctic Peninsula surrounds icebergs in Lemaire Channel, Antarctica

Flip de Nooyer / Sailboat navigating through broken ice, Penola Strait, Argentine Islands, Antarctica

Flip de Nooyer / Two tourists relaxing on the deck of sailboat Meander as it navigates through bergy bits, Lemaire Channel, Antarctica

Flip de Nooyer / Overlooking lichen-covered rocks and ice floes, Lemaire Channel, Antarctica

Flip de Nooyer / Iceberg with attached icicles, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group walking amid bergy bits on Brown Bluff beach near Hope Bay, Antarctic Sound, Antarctica

Flip de Nooyer / Explorers riding through sea ice to land, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group on icefloe in Hope Bay, Antarctic Peninsula, Antarctica

Hiroya Minakuchi / Harbor Seal (Phoca vitulina) resting on ice floe, southeast Alaska

Konrad Wothe / Icebergs in open ocean, Antarctica

Jim Brandenburg / Bits of glacial ice in glacial lake, Canadian Rocky Mountains, Alberta, Canada

Flip de Nooyer / Ice floes and snow covered mountains, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group crowding on melting summer ice floe, Possession Island, Ross Sea, Antarctica

Tui De Roy / Bearded Seal (Erignathus barbatus) resting on ice floe, Kongsfjorden, Spitsbergen, Svalbard, Norwegian Arctic