Sunday, January 19, 2014

a) Outline the conditions under which glaciers are likely to retreat (5)

The firn line of credit of a glacier moving up the valley signifies that the glacier is takeing, and in time though this whitethorn take stick, it allow for s public treasury print forward down a valley. This retreat occurs when a glacier has a negative mass rest, which is where its outputs, such as sublimation, calving, blow-off, are greater than its inputs such as snowfall and avalanches. unawares run seasonal worker worker fluctuations such as a decrease in snowfall would ring about a decrease in the take aim of accretion and an annex in temperature would elapse to an increase in ablation, as the higher(prenominal) temperature would facilitate the melting of the ice. These changes are apt(predicate) to occur in the summer months and may bequeath in inputs falling and outputs increasing, leading to a negative budget. This would cause the firn line along with the glacier to retreat. However, retreat may also occur in the long run, such as in a post-glacial stay whe re global temperature increases are occurring. b)Examine the pretend of retreating glaciers on the governing body and modification of embellishs (20) When discussing the impacts of retreating glaciers, one moldiness understand that glaciers are braggy and dynamic features that have a plethora of significant impacts on the surrounding landscape, which are extend in areas such as Iceland, and in much of the UK.
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frigid retreat occurs when there is a negative mass balance brought on by accumulation being surmounted by ablation. The effects of this are much pronounced when the retreat takes place over a long er-term ascribable to deglaciation, rather ! than just shirt-term seasonal changes. The retreat will result in the deposition of till by the glacier itself forming features such as moraines and drumlins and will also lead to fluvioglacial processes eroding the surrounding landscape and depositing debris. The importance of understanding these impacts is passing relevant for modern multiplication due to the presence of widespread glacial recession occurring that has supposedly been accelerated...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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