Andy Rouse / Polar Bear (Ursus maritimus) portrait in sea-ice landscape. Wide angle / fish-eye shot. Svalbard, Norway, September.

Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial shot of a mass of calved ice in a meltwater lake beneath Fjallsarlon Glacier, southern Iceland, August 2018.

Milan Radisics / Aerial view of Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

SCOTLAND: The Big Picture / Big storm hitting cliffs, with waves breaking over the top, Shetland, Scotland, UK, July.

SCOTLAND: The Big Picture / Big storm hitting cliffs, with waves breaking over the top, Shetland, Scotland, UK, July.

Juergen Freund / Guttering to redirect water at the Daintree Drought Experiment, where rainforest plants grown under cover to see how they respond to drought. Daintree Rainforest Observatory, northern Queensland, Aust...

Juergen Freund / Scientist Susan Laurance leads the Daintree Drought Experiment in far north Queensland. The experiment combines the efforts of plant physiologists, ecologists, soil experts, climatologists and hydrolo...

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.

Juergen Freund / Bleached Staghorn corals (Acropora cervicornis), Great Barrier Reef, Australia, 2017.

Ashley Cooper / Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011

Ashley Cooper / Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011

Ashley Cooper / Sun rays reflected onto solar tower at Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 megawatts (MW) of electricity....

Ashley Cooper / Wind turbine with stacks of coal fired power station in Amsterdam, Netherlands. May 2013

Sylvain Cordier / Polar bear (Ursus maritimus), female with two cubs, on a barrier island outside Kaktovik, Alaska, USA.

Benjamin Olson / Gentoo Penguin (Pygoscelis papua) wet from rain due to climate change, Antarctica

John Waters / Floodwater flowing over banks of the River Parrett onto Aller Moor, near Burrowbridge, Somerset Levels, England, UK, January 2014.

Ingo Arndt / Crack in ice floe in front of icebreaker ship Polarstern. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was driftin...

Eric Baccega / Polar bear (Ursus maritimus) swimming in front of an iceberg, Arctic Bay, Baffin Island, Nunavut, Canada, June.

Roy Mangersnes / Marine iguana (Amblyrhynchus cristatus) feeding in deep water to find algae, off the coast of Fernandina island on Galapagos. April 2016. Much of the algae on coast and at shallower depths have been k...

Roy Mangersnes / Marine iguana (Amblyrhynchus cristatus) feeding in deep water to find algae, off the coast of Fernandina island on Galapagos. April 2016. Much of the algae on coast and at shallower depths have been k...

Roy Mangersnes / Marine iguanas (Amblyrhynchus cristatus) basking on rock next to skeleton of one which starved to death. Unusually warm El Nino waters have killed a lot of the algae which is the food for these iguana...

Roy Mangersnes / Coastal scene on Fernandina Island, with small group of Marine iguanas (Amblyrhynchus cristatus). Galapagos. April 2016. Normally there would be a much larger group but El Nino weather has killed off...

Roy Mangersnes / Dead Marine iguana (Amblyrhynchus cristatus) on the coastal rocks on Santiago Island, Galapagagos, April 2016. It probably died of starvation as much of the algae in the region have died off due to un...

Franco Banfi / Sea star (Hacelia attenuata) on coral covered with mucilage, a symptom of rising sea temperature, Vis Island, Croatia, Adriatic Sea, Mediterranean.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) standing on ice floe, looking at camera. Svalbard, Norway. August.

Staffan Widstrand / Dead Polar bear (Ursus maritimus) starved to death, Zeipelodden, Svalbard, Norway, September.

Ole Jorgen Liodden / Ice cliff of the Austfonna ice cap with melt water and ice crashing down to the sea, Svalbard, Norway, July 2012.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) walking across vast ice floe, Spitsbergen, Svalbard, July 2013.

Michel Roggo / Iceberg in the sea outside the Kangia Ilulissat Icefjord. Iceberg from the Sermeg Kujalleg Glacier, UNESCO World Heritage Site, Kalaallit Nunaat, Greenland, August 2014. Photographed for The Freshwate...

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) swimming, Nordaustlandet, Svalbard, Norway, July.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) footprints in snow, on cracked ice, Svalbard, Norway, September.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) stranded on island, with full moon above, north of Nordaustlandet, Svalbard, Norway, September.

Terry Whittaker / Man sat on picnic bench in park flooded by River Thames, Chertsey, Surrey, UK, February 2014.

Floris van Breugel / Ice cave melting in Mendenhall Glacier, Juneau, Alaska, USA, August 2014.

Floris van Breugel / Ice cave with melt water running through, Mendenhall Glacier, Juneau, Alaska, USA, August 2014.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon at twilight, formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon at twilight, formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Bryan and Cherry Alexander / Icicles hanging from the edge of a small blue iceberg as the summer thaw sets in, Antarctica

David Woodfall / Residents walking through February 2014 floods from River Thames, Wraysbury, Surrey, England, UK, 16th February 2014.

Mark Taylor / Waves breaking against sea wall and cliffs, Seaford, Sussex, England, UK, 15th February 2014.

Mark Taylor / Guildford flooded by River Wey at night, during the 2013 Christmas floods. Surrey, England, 25th December 2013. Digitally enhanced image.

David Woodfall / Mute Swans (Cygnus olor) swimming in Worcester city centre, during February 2014 floods, Worcester, England, UK, 10th February 2014.

Benoit Stichelbaut / Rough seas during Storm 'Ruth', Ile d'Ouessant, Armorique Regional Park, Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finistere, Mer d'Iroise, Iles...

Benoit Stichelbaut / Large waves crash into Le Guilvinec during Storm 'Petra', Finistere, Brittany, France. 5th February 2014. France, Bretagne, Finistere, Le Guilvinec, Tempete "Petra", le 5 fevrier 2014.

Benoit Stichelbaut / Massive wave crashing into Lesconil during Storm 'Petra', Finistere, Brittany, France. 5th February 2014. France, Bretagne, Finistere, Lesconil, Tempete "Petra", le 5 fevrier 2014.

Benoit Stichelbaut / Rough seas at d'Ar-Men lighthouse during Storm 'Ruth', Ile de Sein, Armorique Regional Park. Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finistere,...

Benoit Stichelbaut / Rough seas at Nividic lighthouse during Storm 'Ruth', Ile d'Ouessant, Armorique Regional Park, Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finister...

Benoit Stichelbaut / Rough seas during Storm 'Ruth', Ile d'Ouessant, Armorique Regional Park. Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finistere, Mer d'Iroise, Iles...

Benoit Stichelbaut / Rough seas at Creac'h lighthouse during Storm 'Ruth', Ile d'Ouessant, Armorique Regional Park, Iles du Ponant, Finistere, Brittany, France, Iroise Sea. 8th February 2014. France, Bretagne, Finister...

Mark Taylor / Car park flooded by River Wey, with cars almost completely submerged during Christmas 2013 flooding, Guildford. Surrey, England, UK. 25th December 2013.

David Woodfall / Mute Swan (Cygnus olor) pair in flooded agricultural land adjacent to River Severn, 10th February 2014.

Will Watson / Large hail stones falling during a storm, Herefordshire, England, UK, December.

John Waters / Flood water spilling out of the River Parrett into the surrounding fields of Aller Moor. Somerset Levels, Somerset, UK, January 2014

John Waters / Walkers strolling along the bank between in flooded Aller Moor, with mistletoe laden apple tree, near Burrowbridge, Somerset Levels, Somerset, UK. January 2014

Andy Rouse,Andy Rouse / Waterfall from ice cliffs and polar ice cap. Austfonna Polar Ice Cap, Svalbard, Arctic. August 2011. Highly commended in the GDT competition 2013

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) juvenile spreading body weight over thin newly forming pack ice, trying not to break through, Beaufort Sea, off the 1002 area of the Arctic National Wildlife Refuge, North...

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) juvenile rolling around on newly formed pack ice, Beaufort Sea, off the 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) portrait, female. Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska.

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) curious adult head underwater, Beaufort Sea, off the 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska.

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) young bear in freezing water during autumn freeze up, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska, Beaufort Sea

Steven Kazlowski,Steven Kazlowski / Polar bear (Ursus maritimus) 4-5 year-old on pack ice, low angle shot, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Beaufort Sea, autumn

Alex Hyde / Ratcliffe-on-Soar coal-fired power station cooling towers. Nottinghamshire, UK, January 2013.

Alex Hyde / Ratcliffe-on-Soar coal-fired power station cooling towers. Nottinghamshire, UK, January 2013.

Jean E. Roche / Rhone Glacier scarring in 2004, with buildings in foreground. Compare with image 1403312 showing signs of glacial retreat.

Jean E. Roche / Reproduction of early 20th century postal card possibly by Chr. Brennenstuhl, showing glacier 'Rhone Glacier' in Swiss Alps and mountains with buildings in foreground. Compare with image 01403313 show...

Andy Rouse / Polar bear (Ursus maritimus) standing against expedition ship, taken with extreme wide angle lens, Svalbard, Arctic September 2011

Andy Rouse / Polar bear (Ursus maritimus) on pack ice taken with fisheye lens, Svalbard, Arctic September 2011

Eric Baccega / Young Inuit boy jumping over a crack on ice floe, Ellesmere Island, Nanavut, Canada, June 2012. Model released.

Steven Kazlowski / Young Polar bear (Ursus maritimus) in the water along the coast of the Beaufort Sea, Bernard Spit, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Brent Stephenson / A large hole in an iceberg with icicles hanging. Yalour Islands, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Huge iceberg with streaked sky under expansive open sky. Drake Passage, near the South Shetland Islands, Antarctica, December.

Brent Stephenson / Large growler berg in the Lemaire Channel. Antarctic Peninsula, Antarctica, January.

Andy Rouse / Waterfall and ice cliff catching evening light. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Waterfall from ice cliffs with ice-cap stretching into the distance. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Ice cliff and waterfall catching evening light. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Andy Rouse / Waterfall from ice cliffs with ice-cap stretching into the distance. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Andy Rouse / Polar Bear (Ursus maritimus) crossing pack ice. Svalbard, Norway, September.

Andy Rouse / Polar Bear (Ursus maritimus) sleeping on pack ice. Wide angle / fish-eye shot. Svalbard, Norway, September.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) sitting on floe in vast thawing sea-ice landscape. Spitsbergen, Svalbard, August 2011. Second place, Mammals Category, GDT 2012 competion. Winner in ANIMALS IN THEIR ENVIR...

Ole Jorgen Liodden / Black-legged Kittiwake (Rissa tridactyla) in blue ice. Spitsbergen, Svalbard, July.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) in arctic ice landscape backlit by midnight sun. Nordaustlandet, Svalbard, August.

Ole Jorgen Liodden / Detail of blue iceberg. Spitsbergen, Svalbard, August.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) looking across ice floe seascape. Nordaustlandet, Svalbard, August.

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) profile in silhouette. Nordaustlandet, Svalbard, August.

Nuno Sa / Whale Shark (Rhincodon typus) accompanied by Pilot Fish (Naucrates ductor) and Remora. The biggest fish in the world has only started to visit the Azores in the past three years due to water temperatu...

Jenny E. Ross / Polar Bear (Ursus maritimus) sub-adult male on cliff searching for eggs in Brunnich's Guillemot nests, as gulls look on from above. This unusual behaviour happens when when lack of sea-ice prevents t...

Bryan and Cherry Alexander / Drygalski Glacier, which receded 300 metres between November 2008 and 2009, South Georgia, 2009.

David Woodfall / Aerial view of pancake ice sheet cracking and melting in Hudson Bay, Manitoba, Canada, December 2004

Bryan and Cherry Alexander / Meltwater pouring off iceberg above hole. Scoresbysund Fiord, East Greenland, September 2005.

Bryan and Cherry Alexander / Huge blocks of ice teeter, ready to become icebergs on the glaciated coast. Gerlache Strait, Southern Ocean, Antarctica, October 2009.

Bryan and Cherry Alexander / Icicles hanging from a ledge on an iceberg, Antarctica, October 2006.