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The retreat of glaciers since 1850 is a well-documented effect of climate change. The retreat of mountain glaciers provide evidence for the rise in global temperatures since the late 19th century.
Glacial retreat refers to the process of a glacier shrinking or receding in size over time. This occurs when the amount of ice melting or sublimating from the glacier exceeds the amount of new snow or ice accumulation. The causes of glacial retreat can be complex and are often interrelated.
The retreat of glaciers (see PDF at end of page) in Glacier National Park, Montana, has received widespread attention by the media, the public, and scientists because it is a clear and poignant indicator of change in the northern Rocky Mountains of the USA.
The Holocene glacial retreat is a geographical phenomenon that involved the global retreat of glaciers (deglaciation) that previously had advanced during the Last Glacial Maximum. Ice sheet retreat initiated ca. 19,000 years ago and accelerated after ca. 15,000 years ago.
Among the most dramatic evidence that Earth's climate is warming is the retreat and disappearance of mountain glaciers around the world. Based on preliminary data for 2022/23, 2023 was the 36 th year in a row that the reference glaciers tracked by the World Glacier Monitoring Service lost rather than gained ice.
Icebergs have tumbled from Greenland’s glaciers for thousands of years as part of a natural cycle that typically balanced glacier growth in the winter with melting and retreat in the summer. The new study finds that ice retreat has far outpaced growth throughout the 21st century.
Glacier retreat refers to the process where glaciers lose more snow and ice through melting than they gain, leading to a reduction in their size and mass. This phenomenon is primarily driven by atmospheric warming and has significant impacts on water availability, ecosystems, and economic sectors like tourism and mining.
Today, many alpine glaciers are in rapid retreat, but it’s not because of ice age cycles. This round of melting is likely being caused by human activities. On a warm morning in August 2024, glaciologist Mauri Pelto stood below the Easton Glacier on the flanks of Mount Baker in northern Washington.
Projections of future glacier retreat by GLOGEM provide changes in glacier mass balance, area, volume and water runoff at annual resolution and for every single glacier worldwide until 2100.
Over the past 60 to 100 years, glaciers worldwide have tended to retreat. Tidewater glaciers, which flow through valleys out to sea, are susceptible to retreat at the point where the ice meets relatively warm ocean water.