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Melting of mountain glaciers from 1994 to 2017 (6.1 trillion tonnes) constituted about 22% of Earth's ice loss during that period. [7]Excluding peripheral glaciers of ice sheets, the total cumulated global glacial losses over the 26 years from 1993 to 2018 were likely 5500 gigatons, or 210 gigatons per yr. [1]: 1275
[6] [7] Since the end of the Last glacial period about 12,000 years ago, ice sheets have retreated on a global scale, and Earth has been experiencing a relatively warm interglacial period marked by only high-altitude alpine glaciers at most latitudes with larger ice sheet and sea ice at the poles. [8]
Most lakes in the world occupy basins scoured out by glaciers. Glacial motion can be fast (up to 30 metres per day (98 ft/d), observed on Jakobshavn Isbræ in Greenland) [1] or slow (0.5 metres per year (20 in/year) on small glaciers or in the center of ice sheets), but is typically around 25 centimetres per day (9.8 in/d). [2]
While no glaciers disappeared between 1980 and 1990, the 25 years after 1990 showed 35 glaciers had disappeared. In total, the glacier area has decreased by 45% compared to 1980.
Examples of tipping points include thawing permafrost, which will release methane, a powerful greenhouse gas, or melting ice sheets and glaciers reducing Earth's albedo, which would warm the planet faster. Thawing permafrost is a threat multiplier because it holds roughly twice as much carbon as the amount currently circulating in the atmosphere.
The world’s glaciers are shrinking and disappearing faster than scientists thought, with two-thirds of them projected to melt out of The post Glaciers provide drinking water to billions, and 2/3 ...
The United Nations cultural agency UNESCO monitors some 18,600 glaciers across 50 of its World Heritage sites and said that glaciers in one third of World Heritage sites will disappear by 2050 ...
Ice–albedo feedback is a climate change feedback, where a change in the area of ice caps, glaciers, and sea ice alters the albedo and surface temperature of a planet. Because ice is very reflective, it reflects far more solar energy back to space than open water or any other land cover. [1] It occurs on Earth, and can also occur on exoplanets ...