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What relationship between accumulation and ablation is necessary for the ice front of a glacier to advance?
Wiki User
∙ 9y ago
The accumulation or snowfall rate needs to exceed the ablation which is the snow or ice melting rate in order for a glacier to advance or move forward. ~hope I'm right!
Wiki User
∙ 9y ago
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Does glacial advance decreases or increases sea level?
Glacial advance would lower sea level.
What factor could contribute to a glacier advancing instead of retreating?
The rate of movement is determined by: * Amount of basal debris: (More debris will slow it down). * Amount of basal meltwater: (More meltwater will speed it up, however if there is too much meltwater, the glacier will simply 'buoy up' and not move at all). * Gravity. * Gradient: (Steeper gradient, faster movement). * The thickness of ice: (Which influences basal temperature and pressure melting point). * Internal temperature of the ice. * The glacial buget: (positive budget, faster rate of movement). * Surges: (such as avalanches greatly increase the speed of a glacier).
Two air masses that meet and do not advance?
stationary front
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Under what circumstances will the front of the glacier advance Retreat Remain history?
Glacial advance and retreat is determined by the balance between the accumulation of snow and the removal of ice by sublimation, melting, and calving (ablation). When the rate of ablation below the snowline equal
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What is the process of glacier development and growth?
Glaciers develop and grow through a complex process that involves the accumulation and compaction of snow over long periods of time. Here is an overview of the process of glacier development and growth: Snow Accumulation: Glacier formation begins with the accumulation of snow in an area that experiences more snowfall during the winter than it loses through melting in the summer. This accumulation of snow is crucial to the glacier's growth. Over time, more and more snow accumulates, creating a layer of firn, which is granular snow that has partially compacted but is not yet fully transformed into glacial ice. Compression and Compaction: As new layers of snow accumulate on top of each other, the weight of the overlying snow causes the lower layers to become more compacted. This compaction forces out air and eventually transforms the firn into dense, granular ice. This process can take several years or even centuries, depending on the climate and the rate of snow accumulation. Glacier Formation: With continued snow accumulation and compaction, the granular ice eventually transitions into glacial ice, which is much denser and flows like a slow-moving river of ice under the influence of gravity. This is the point at which a glacier is considered to have formed. Flow and Glacier Movement: Glaciers are not stationary; they flow and move downslope due to their own weight and the force of gravity. The movement of glaciers is very slow, often just a few centimeters to meters per day, depending on the glacier's size and the terrain it flows over. This movement is what distinguishes a glacier from a static ice field or ice cap. Zone of Accumulation and Zone of Ablation: Glaciers have two distinct regions: the "zone of accumulation" and the "zone of ablation." The zone of accumulation is the upper part of the glacier where snow accumulation exceeds melting and sublimation. The zone of ablation is the lower part of the glacier where the ice melts or sublimates more than it accumulates. These two zones are in dynamic balance, and the boundary between them may shift over time in response to changes in climate. Glacier Growth: For a glacier to grow, the zone of accumulation must receive more snow and ice than the zone of ablation loses through melting and sublimation. Over time, this net gain in ice causes the glacier to advance and grow in size. Response to Climate: Glaciers are highly sensitive to changes in temperature and precipitation. Warmer temperatures or reduced snowfall can cause a glacier to retreat as the zone of ablation expands and overtakes the zone of accumulation. Conversely, colder temperatures and increased snowfall can lead to glacier advance. The process of glacier development and growth is a continuous cycle, with the glacier advancing and retreating in response to changes in climate and the balance between snow accumulation and ice loss. Glaciers are valuable indicators of climate change, and their behavior is closely monitored by scientists to understand the Earth's changing climate.
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