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What is a glacier snout?
A glacier snout is the terminus or end point of a glacier where ice and meltwater are released. It is where the glacier meets lower elevations and warmer temperatures, causing melting and ice loss. The snout can vary in shape and size depending on the glacier's dynamics.
What is zone of wastage?
The zone of wastage refers to the area of a glacier where more ice is melting or sublimating than is being replenished by snow accumulation. It is typically at the lower end of a glacier where temperatures are warmer, causing increased melting.
What change would occur in a glacier if average annual temperature rose and the precipitation decreased?
The glacier would retreat. The rise in temperature would cause the glacier itself to start melting, and in addition, would lower the amount of precipitation in the form of snow at the top of the glacier. It would be rain instead. Lowering the precipitation would cause less ice formation as well and would also contribute to the glacier retreating.
What is crevasse slip?
A crevasse slip is a type of glacier movement where the upper portion of the glacier slides down relative to the lower portion, causing the opening of crevasses or cracks on the surface. This movement can be triggered by internal glacier stress, changes in temperature, or the presence of water at the base of the glacier. Crevasse slips can pose risks to glacier travelers and mountaineers.
Where can one find a glacier equilibrium line?
A glacier equilibrium line, also known as the equilibrium line altitude (ELA), can be found at the point on a glacier where the amount of snow accumulation equals the amount of ice ablation (melting and sublimation) over a year. This line typically varies with altitude, latitude, and local climate conditions and is often located at higher elevations in warmer climates and lower elevations in colder regions. It can be observed on glacier surfaces during the melting season when the seasonal snow cover recedes.
What is the lower end of a glacier called?
The area that is melting faster than it is accumulating is the "Zone of Ablation." The very bottom end of a glacier is typically called its "foot."
What is a glacier snout?
A glacier snout is the terminus or end point of a glacier where ice and meltwater are released. It is where the glacier meets lower elevations and warmer temperatures, causing melting and ice loss. The snout can vary in shape and size depending on the glacier's dynamics.
What is zone of wastage?
The zone of wastage refers to the area of a glacier where more ice is melting or sublimating than is being replenished by snow accumulation. It is typically at the lower end of a glacier where temperatures are warmer, causing increased melting.
What change would occur in a glacier if average annual temperature rose and the precipitation decreased?
The glacier would retreat. The rise in temperature would cause the glacier itself to start melting, and in addition, would lower the amount of precipitation in the form of snow at the top of the glacier. It would be rain instead. Lowering the precipitation would cause less ice formation as well and would also contribute to the glacier retreating.
What is crevasse slip?
A crevasse slip is a type of glacier movement where the upper portion of the glacier slides down relative to the lower portion, causing the opening of crevasses or cracks on the surface. This movement can be triggered by internal glacier stress, changes in temperature, or the presence of water at the base of the glacier. Crevasse slips can pose risks to glacier travelers and mountaineers.
Hanging valley and a glacial trough?
Glacial Trough (U-shaped valleys) - Flat-bottomed valley with steep sides produced by the erosion of the floor and sides of the valley by an alpine glacier as its sediment abrades while the glacier flows downhill. On the topographic maps they are recognized by closely spaced contours along the valley sides and widely spaced contours on the valley floor.Hanging Glacial Troughs - Formed when the down-cutting erosion of the main valley glacier exceeds that by the tributary glacier. The tributary glacier flows onto the main glacier and thus has an erosional base level of the elevation of the main valley glacier. After melting, the lower portion of the tributary glacial trough is then left hanging above the main floor of the glaciated valley. On maps they are recognized by more widely spaced contours across a stream in the upper portion than in the lower portion (where the modern stream cascades into the main valley below).
How do glaciers retreat?
Glaciers retreat due to a combination of increased melting at their lower ends and reduced snowfall at their upper ends. This melting is often caused by rising temperatures due to climate change. As glaciers lose more ice than they gain, they shrink and retreat.
How is a glacier formed the melting and refreezing of snow the weathering and erosion of snow the erosion and deposition of ice the melting and precipitation of snow?
A glacier is formed through the accumulation of snow that compresses into ice over time. As more snow falls and compacts, it displaces air and forms glacial ice. This process is aided by the weight of the overlying snow, which causes the lower layers to compress and recrystallize into ice.
Why is the glacier melting a threat to water supplies?
The lower parts of glaciers melt and the water flows to fill the rivers downstream. If global warming causes the whole glacier to melt, then the rivers will lose their mountain supply and the lives of people downstream, who rely on water for living and agriculture will be threatened.
What has a lower melting point than ionic solids?
Covalent compounds have a lower melting point.
Would the melting point of caesium be higher or lower then sodium?
The melting point of cesium is lower than that of sodium. Cesium has a melting point of 28.4°C, while sodium has a melting point of 97.8°C.
What are three differences between zone of ablation and zone of accumulation?
Zone of ablation is the area of a glacier where there is a net loss of ice due to melting, sublimation, and calving, while the zone of accumulation is the area where snowfall exceeds melting and forms new ice. In the zone of ablation, the glacier's terminus retreats, while in the zone of accumulation, the glacier advances. The zone of ablation typically occurs at lower elevations and is characterized by a negative mass balance, whereas the zone of accumulation is found at higher elevations with a positive mass balance.
