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A '''[[glacier]]''' is a persistent body of dense [[ice]] that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating [[crevasse|crevasses]] and other distinguishing features. They also abrade rock and debris from their substrate to create landforms such as cirques and moraines. Glaciers form only on land and are distinct from the much thinner [[sea ice]] and lake ice that form on the surface of bodies of water. | A '''[[glacier]]''' is a persistent body of dense [[ice]] that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating [[crevasse|crevasses]] and other distinguishing features. They also abrade rock and debris from their substrate to create landforms such as cirques and moraines. Glaciers form only on land and are distinct from the much thinner [[sea ice]] and lake ice that form on the surface of bodies of water. | ||
On Earth, 99% of glacial ice is contained within vast [[ice sheet|ice sheets]] in the [[Antarctic Circle|polar regions]]. | On Earth, 99% of glacial ice is contained within vast [[ice sheet|ice sheets]] in the [[Antarctic Circle|polar regions]]. [[Sif Island]], first discovered in February 2020, is thought to have been created by post-glacial rebound caused by the retreating [[Pine Island Glacier]]. Recent global warming has caused mountain glaciers and the ice sheets in Greenland and [[Antarctica]] to melt and global sea level to rise. Therefore, monitoring sea level rise and the mass balance of ice sheets and glaciers allows people to understand more about [[global warming]]. | ||
'''([[glacier|Full Article...]])''' | '''([[glacier|Full Article...]])''' | ||