28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves holding a one meter section ice core stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarcti... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves holding a one meter section ice core stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarcti... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves holding a one meter section ice core stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarcti... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves holding a one meter section ice core stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarcti... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves holding a one meter section ice core stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarcti... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory, cylinders of ice core samples stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarctica, Greenland, and North Americ... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory, cylinders of ice core samples stored at -36 degrees C. The Laboratory stores 19,000 meters of ice cores from Antarctica, Greenland, and North Americ... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves packing insulation in a box of ice cores being shipped to a scientist. The Laboratory stores 19,000 meters of ice cores from... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory, an ice core from Greenland is prepared for cutting. The Laboratory stores 19,000 meters of ice cores from Antarctica, Greenland and North America, m... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves cutting an ice core from Greenland. The Laboratory stores 19,000 meters of ice cores from Antarctica, Greenland and North Am... © Jim West

28-08-2017 - Denver, Colorado, USA National Ice Core Laboratory curator Geoff Hargreaves cutting an ice core from Greenland. The Laboratory stores 19,000 meters of ice cores from Antarctica, Greenland, and North A... © Jim West

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Cracked dried up mud, Laguna Miluni reservoir, Bolivia, which supplies water to the city of La Paz below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far... © Boris Heger

22-11-2009 - Water course supplies water to La Paz, below the Huayna Potosi Mountain. The glaciers in the Andes are retreating, reducing the level to far lower than normal. Run-off from glaciers in the Cordillera... © Boris Heger

06-08-2009 - Walkers are guided by painted markings and cairns on the Olperer, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - Walker on a footbridge on the Friesenberg in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - The melting remains of what would once have been a glacier, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - Walkers using a footbridge on the Olperer, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - A view of the Olperer Hut on the mountain with the same name, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - Walkers are guided by painted markings and cairns on the Olperer, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - Walkers are guided by painted markings and cairns on the Olperer, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - The view from the slopes of the Olperer over the dam at Schlegeisspeicher, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - The view from the slopes of the Olperer over the dam at Schlegeisspeicher, in Austrias Zillertal region in the Tyrol. © Gerry McCann

06-08-2009 - The view from the slopes of the Olperer over the dam at Schlegeisspeicher, in Austrias Zillertal region in the Tyrol. © Gerry McCann

05-08-2009 - The view from the Ahornspitze, in Austrias Zillertal region in the Tyrol. © Gerry McCann

05-08-2009 - Walkers near the summit of the Ahornspitze, in Austrias Zillertal region in the Tyrol. © Gerry McCann

05-08-2009 - Walkers on the summit of the Ahornspitze, in Austrias Zillertal region in the Tyrol. © Gerry McCann

05-08-2009 - Walkers on the summit rocks of the Ahornspitze, in Austrias Zillertal region in the Tyrol. © Gerry McCann

05-08-2009 - Walker on the summit rocks of the Ahornspitze, in Austrias Zillertal region in the Tyrol. © Gerry McCann

02-08-2009 - Walkers on the Penken range in Austrias Zillertal region in the Tyrol, Austria © Gerry McCann

02-08-2009 - Walkers on the Penken range, in Austrias Zillertal region in the Tyrol. © Gerry McCann

02-08-2009 - Construction work for the tourist industry on the Penken range, in Austrias Zillertal region in the Tyrol. © Gerry McCann

28-01-2007 - A snowboarder carves on some off piste at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Snowmaking machine , Alps. The machine blows water through a fine mesh which freezes if the temperature is below freezing, producing snow on the pistes for the skiers. © Paul Box

20-01-2007 - Snowmaking machine , Alps. The machine blows water through a fine mesh which freezes if the temperature is below freezing, producing snow on the pistes for the skiers. © Paul Box

20-01-2007 - Snowmaking machine, Alps. The machine blows water through a fine mesh which freezes if the temperature is below freezing, producing snow on the pistes for the skiers. © Paul Box

20-01-2007 - Snowboarders at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Skiers and snowboarders at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Skiers and snowboarders at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Skiers and snowboarders at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - A snowboarder hikes to find better snow conditions off piste, La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - A snowboarder hikes to find better snow conditions off piste, La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Skiers and snowboarders at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Snowboarders hike to find better snow conditions off piste, on the french and italian border at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mounta... © Paul Box

20-01-2007 - Snowboarders hike to find better snow conditions off piste, on the french and italian border at La Rosiere in the French Alps. With unseasonably warm temperatures the snow has been melting. The mounta... © Paul Box

20-01-2007 - Mountains near Les Arcs and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Mountains near Les Arcs and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting. The mountains have little snow cover. © Paul Box

20-01-2007 - Snowmaking machine, Alps. Although fresh snow is needed the temperature is too warm to use the machine. The machine blows water through a fine mesh which freezes if the temperature is below freezing,... © Paul Box

20-01-2007 - Snowmaking machine, Alps. Although fresh snow is needed the temperature is too warm to use the machine. The machine blows water through a fine mesh which freezes if the temperature is below freezing,... © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting leaving mud and rocks showing on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting leaving mud and rocks showing on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting leaving mud and rocks showing on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth ,water and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving water and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving water and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Les Arcs ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud and rocks showing on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud and rocks showing on the pistes. © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud, rocks, earth and ice on the pistes. © Paul Box

20-01-2007 - Snowmaking machine , Alps. Although fresh snow is needed the temperature is too warm to use the machine. The machine blows water through a fine mesh which freezes if the temperature is below freezing,... © Paul Box

20-01-2007 - Snowmaking machine , Alps. Although fresh snow is needed the temperature is too warm to use the machine. The machine blows water through a fine mesh which freezes if the temperature is below freezing,... © Paul Box

20-01-2007 - Sainte Foy ski resort, near Val dIsere and Tignes in the French Alps. With unseasonably warm temperatures the snow has been melting, leaving mud and rocks showing on the pistes. © Paul Box