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Glaciers are sensitive indicators of global warming. The photograph shows the Moreno Glacier where it enters Lago Argentino, Patagonia. The water in the lake is around 14ºC in summer, melting the ice face from beneath, leaving huge masses of ice hanging. As the photograph shows, when the overhang weight is larger than the shear force strength of the ice wall, gigantic ice block crash into Lago Argentino, eroding the glacial front wall. Moreno Glacier if one of the few glaciers in the world where the erosion at the front is still slower than the replenishment from behind. Global warming is steadily warming the surface waters of Lago Argentino leading to a more rapid erosion at the glacial front. In this sense the Moreno Glacier is a benchmark for global warming since once the Moreno Glacier starts to retreat, global warming impact will be global.

Glacier Graubunden canton, Switzerland

young man taking a photo to a glacier, river, snowy

Mountain lake in summer. Arabel lake, South Tien Shan, Issyk-Kul region

Perito Moreno glacier ice in Patagonia, Argentina Los Glaciers National Park near El Calafate. Bule ice South America mountains patagonian glacier on a sunny day with clouds. Glacier serac falling in lake

Majestic glacier view

Blue Glacier on Black Rock Lake Southern Patagonian Ice Field Torres del Paine National Park Patagonia Chile

Snow capped mountain range with bright green pine trees in foreground on a sunny day

Panoramic Landscape view of Rohtang Pass, a high altitude mountain pass on eastern Pir Panjal Range of Himalayas near Manali. It connects Kullu District with Lahaul and Spiti Valleys of Himachal Pradesh, India Asia Pac.

Salmon Glacier the 7th largest glacier in North America, located in the town of Hyder, Alaska but situated within British Columbia.

A view on Perito Moreno Glacier in Argentina

Happy 46-year-old female tourist is streaming from mountain pass standing over beautiful glacier lake

Patagonia, Argentina - January 7, 2018: View of the Perito Moreno Glacier. Copy space for text.

The snow has returned to Interior Alaska as another winter creeps into the state.

Patagonia mountain landscape in El Chalten, Cerro Torre, Laguna Torre with iceberg in Argentina. Beautiful patagonian mountains, Fitz Roy

Yellow aspens on a distant conifer forest with the Colorado Continental Divide beyond.

Melting glacier seen from Oldevatnet Lake near Olden, off Nordfjord, Norway.

Glacier National Park, Montana - Sunset, Lakeshore

Many icebergs floating on the surface of alpine Tasman Lake in Tasman valley Mt Cook national park

$Berner Oberland canton, Switzerland\nShe walks on a trail along a beautiful blue lake in the center of Switzerland.$

A wide shot of ruth glaciers covered in snow

Man Photographing in Columbia ice

Yoho National Park, British Columbia, Canada is on the western slopes of the Great Divide, glaciers and waterfalls cling to the towering peaks.

Trees showing off autumn in far out Montana ranch land.

Rockies, forests and Kootenay River along the Banff Windermer HWY Kootenay National Park British Columbia Canada

hiker on top of mountain. Lombardy, Italy, Graubünden, Switzerland.

Bluebell Pool, in the West Thumb Geyser Basin in Yellowstone National Park

Hiker rejoicing in a stunning natural environment

Mountain lake in the Altai Mountains. Siberia, Russia.

Panoramic views of Teton Range in Wyoming, USA.

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