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Glacier Quick Facts | National Snow and Ice Data Center What is a glacier? 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
Glaciers - National Snow and Ice Data Center What is a glacier? 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 Alpine glaciers are frozen rivers of ice, slowly
Science of Glaciers | National Snow and Ice Data Center Science What is the lifecycle of a glacier, and what factors influence its lifecycle? The amount of precipitation, whether in the form of snowfall, freezing rain, avalanches, or wind-drifted snow, is important to glacier survival
Why Glaciers Matter | National Snow and Ice Data Center 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
Ice Sheets Today - National Snow and Ice Data Center A moderately intense melt season for the Greenland Ice Sheet has continued in July, with an extended period of high temperatures and coastal melting in mid-July where nearly half of the ice sheet experienced melt Water carves into the Greenland Ice Sheet, exposing layers of dust At the edge of the
Sea Ice Today - National Snow and Ice Data Center Sea ice data is updated daily, with a one-day lag On occasion, there is data delay which is usually resolved within a few days The orange line in extent and concentration images (left and middle) and the gray line in the time series (right) indicate 1981 to 2010 average extent for the day shown The graph also includes lines for selected earlier years, for comparison Learn more about how to
Global PyGEM-OGGM Glacier Projections with RCP and SSP Scenarios . . . This data set comprises results from a hybrid glacier evolution model that uses the mass balance module of the Python Glacier Evolution Model (PyGEM) and the glacier dynamics module of the Open Global Glacier Model (OGGM) Output parameters include projections of glacier mass change, fixed runoff, and various mass balance components at regionally aggregated and glacier scales
Randolph Glacier Inventory - A Dataset of Global Glacier Outlines . . . Overview The Randolph Glacier Inventory (RGI) is a global set of glacier outlines; it is intended as a snapshot of the world’s glaciers This data set provides a single outline for each glacier and is produced in coordination with the Global Land Ice Measurements from Space (GLIMS) initiative
Learn - National Snow and Ice Data Center Quick facts, basic science, and information about snow, ice, and why the cryosphere matters The cryosphere includes all of the snow and ice-covered regions across the planet
ITS_LIVE - NSIDC Data Access: Yearly and Composite Glacier VelocitiesLayer: Glacier Velocity Mosaic