Ole Jorgen Liodden / Black-legged Kittiwake (Rissa tridactyla) in blue ice. Spitsbergen, Svalbard, July.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) in arctic ice landscape backlit by midnight sun. Nordaustlandet, Svalbard, August.
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Ole Jorgen Liodden / Detail of blue iceberg. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) looking across ice floe seascape. Nordaustlandet, Svalbard, August.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) profile in silhouette. Nordaustlandet, Svalbard, August.
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Mark Carwardine / Tourists in zodiac looking at icebergs. Antarctic Peninsula, January.
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Inaki Relanzon / Blue ice melt pool in snow near the peak of La Munia Circo. The Pyrenees, Aragon, Spain, May 2011.
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Diane McAllister / The snow at Horsetail Falls' begins to melt in mid-February, enabling the falls to resume once again. The clear sky and low sun angle ignite the rock wall during sundown. Yosemite National Park, Calif...
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Laurie Campbell / Buachaille Etive Mor during spring thaw, Glencoe, Scotland, UK, March
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Jim Brandenburg / Polar Bear (Ursus maritimus) running over icefield during spring thaw, Ellesmere Island, Nunavut, Canada
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Stefan Christmann / Sea ice in summer thaw. Atka Bay, Antarctica. February 2017.
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Guy Edwardes / Frozen lake, Snaefellsnes, Iceland, March 2017.
