A receding terminus isn't a process of ablation, it's a result of ablation. A receding terminus doesn't extend as far as it did the previous year. In other words, the glacier is shrinking.
This content is available in flash format only. Please consult our instructions for enabling Flash in your web browser. Your Account. Land Ice Part A: Mass Balance The term "land ice" can be used to describe any ice that formed over land primarily from freezing precipitation as opposed to sea ice, which forms by the freezing of seawater.
Diagram of a glacier showing components of mass balance. Accumulation Zone. The zone of a glacier in which losses through various processes, such as calving, deflation, melting, etc. Compare accumulation zone.
From: ablation zone in A Dictionary of Weather ». Subjects: Science and technology — Environmental Science. View all related items in Oxford Reference ». Search for: 'ablation zone' in Oxford Reference ».
All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use for details see Privacy Policy and Legal Notice. The shallower, the more maritime… I believe. I study soils, but wanted to make sure I fully understood a concept. Net Mass Balance bn is a value per unit area for the entire surface of a glacier, correct?
Thus, if one wanted to compute a rough estimate of runoff, you then only need to multiply the bn by the glacial surface area. In long term, the climate of the Earth is going towards the next Ice Age. What is your opinion about prolongation of the current Interglacial Stage thanks to the human effact on the global climate?
The same is valid with the total ice volumes on the Earth. In such a scale, the currrent temperature increase is still in the range of the natural fluctuation. See for example, the slide on p. How to calculate Mass change? Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Glacier mass balance Measuring mass balance Mass balance gradients Mass balance through time Further reading References Comments Glacier mass balance The mass balance of a glacier is a concept critical to all theories of glacier flow and behaviour.
Glacier mass balance and atmospheric circulation. By NASA. From Wikimedia Commons. The accumulation zone for this glacier extends from the plateau downwards. The Glacier as a System. Inputs are largely from precipitation, and also from wind-blown snow and avalanches. The glacier loses mass ablates mainly by the processes of calving and surface and subaqueous melt. In this simplified figure, processes of internal and basal accumulation are ommitted. See Cogley et al. Meltwater stream on Mendenhall Glacier, Alaska.
From: Gillfoto, Wikimedia Commons. Equilibrium line altitudes in a hypothetical glacier. Medial moraines on the North Patagonian Icefield Landsat image. Each medial moraine separates out an individual flow unit. Mass balance gradients of some typical glaciers.
References 1. Benn, D. London: Hodder Education. Related Articles The surface energy balance. Case Study. Thank you very much, I found it very useful now I can show my work to Mohamed Elmi. Leave a Reply Cancel reply Your email address will not be published. Comment Name Email Website Save my name, email, and website in this browser for the next time I comment.
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