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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]
Measurements of discharge increase during spring and are highest in the summer, during which warmer temperatures promote the additions of meltwater. [7] Meltwater is a major contributor to many glacial stream’s annual water budget. [ 7 ]
The limiting case of the Venturi effect is when a fluid reaches the state of choked flow, where the fluid velocity approaches the local speed of sound of the fluid. When a fluid system is in a state of choked flow, a further decrease in the downstream pressure environment will not lead to an increase in velocity, unless the fluid is compressed.
Subglacial streams are conduits of glacial meltwater that flow at the base of glaciers and ice caps. [1] Meltwater from the glacial surface travels downward throughout the glacier, forming an englacial drainage system consisting of a network of passages that eventually reach the bedrock below, where they form subglacial streams. [1]
For particles with a small settling velocity, diffusion will increase the complexity of the particle's path to the bottom and the time it takes to settle compared to particles with high settling velocities. The settling velocity (also called the "fall velocity" or "terminal velocity") is a function of the particle Reynolds number.
The melting of Alaska's Juneau icefield, home to more than 1,000 glaciers, is accelerating. The snow covered area is now shrinking 4.6 times faster than it was in the 1980s, according to a new study.
June 29 was 1.59 milliseconds shorter than usual – the shortest day since the 1960s when scientists began using atomic clocks to measure time, Forbes reported.
There have been some lightning strikes and thunder rumbles near NC State’s campus Thursday, Smith said. ... They found 642 days between the first of December and the end of February when ...