Glacier Quick Facts - National Snow and Ice Data Center
网页A glacier is an accumulation of ice and snow that slowly flows over land. Alpine glaciers are frozen rivers of ice, slowly flowing under their own weight down mountainsides and into valleys. Ice sheets exist only on Greenland and Antarctica, and they spread out in broad domes in multiple directions. A group of people explore the Perito Moreno ...
Glaciers - National Snow and Ice Data Center
网页A glacier is an accumulation of ice and snow that slowly flows over land. At higher elevations, more snow typically falls than melts, adding to its mass. Eventually, the surplus of built-up ice begins to flow downhill. At lower elevations, there is usually a higher rate of melt or icebergs break off that removes ice mass.
Science of Glaciers | National Snow and Ice Data Center
网页The Taylor Glacier is an Antarctic glacier about 54 kilometers (34 miles) long, flowing from the plateau of Victoria Land into the western end of Taylor Valley. — Credit: Eli Duke/Flickr. Valley commonly originate from mountain glaciers or icefields, these glaciers spill down valleys, looking much like giant tongues.
Why Glaciers Matter - National Snow and Ice Data Center
网页Why they matter. Glaciers, slow-moving rivers of ice, have sculpted mountains and carved valleys throughout Earth's history. They continue to flow and shape the landscape in many places today. But glaciers affect much more than the landscape. Glacier melt delivers nutrients into lakes, rivers, and oceans. Those nutrients can drive blooms of ...
GLIMS - National Snow and Ice Data Center
网页GLIMS is an international project to inventory the world’s glaciers and to create a comprehensive, global database of land ice through repeat surveys.This data collection’s primary data product is the GLIMS Glacier Database. The glacier database includes measurements of glacier geometry, glacier area, snowlines, supraglacial lakes and rock ...
What are glacial lakes? | National Snow and Ice Data Center
网页2022年2月15日 · A glacial lake is a body of water that originates from a glacier. It typically forms at the foot of a glacier, but may form on, in, or under it. As Earth’s climate warms, the world’s glaciers are shrinking, increasing freshwater outputs to all kinds of glacial lakes. Some communities depend on glacial meltwater for seasonal irrigation or ...
The story is in the ice: Documenting climate change through the …
网页2024年8月12日 · Eventually, more than 70 time-lapse cameras were placed in the field in Alaska, Glacier National Park in Montana, Iceland, Greenland, Nepal, Austria, Antarctica, Canada, and South Georgia Island. They were programmed to snap continuous shots of glaciers during every hour of daylight for months or years on end.
piedmont glacier - National Snow and Ice Data Center
网页The Malaspina Glacier is one of the most famous examples of this type of glacier, and is the largest piedmont glacier in the world. Spilling out of the Seward Ice Field (visible near the top of the photograph), it covers over 5,000 square kilometers as it spreads across the coastal plain. SPACE.com and NASA. Topic (s): glaciers.
Ice Sheets Today | National Snow and Ice Data Center
网页2024年8月14日 · Together, the Antarctic and Greenland Ice Sheets contain more than 99 percent of freshwater ice on Earth. If they both completely melted, they would raise sea level by an estimated 67.4 meters (223 feet). Long-term satellite data indicate that through most of the twentieth century, the ice sheets made very little contribution to sea level, and ...
World Glacier Inventory - NSIDC
网页The World Glacier Inventory (WGI) contains information for over 130,000 glaciers. Inventory parameters include geographic location, area, length, orientation, elevation, and classification. The WGI is based primarily on aerial photographs and maps with most glaciers having one data entry only. Hence, the data set can be viewed as a snapshot of ...