lakes

Glacial Varved Sediments

Varved sediments (varves) refers to the annually laminated sediment deposited at the base of some lakes, or marine settings[1]. These sediments are incredible resources for researchers who look into changes in climate and environmental systems in the past. This is because they can record changes to these systems at an annual, or even seasonal resolution. …

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Ice-dammed lake landsystems

Ice-dammed lakes are a common feature of glaciated mountain ranges. They form wherever glacial ice blocks the drainage of rivers or meltwater. This includes: where a glacier blocks a trunk or tributary valley; and where a glacier fills an overdeepened valley created by glacial erosion Today, ice-dammed lakes exist at the margins of many mountain …

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Calving of freshwater glaciers

This article, while drawing on a variety of literature, is largely based on an excellent review of calving processes by Prof. Doug Benn and colleagues in the journal Earth Science Reviews. If you want to know more about glacier calving, this review paper would make a great starting point. What is calving? Calving is the glaciological …

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Glaciolacustrine Landforms in Patagonia, Chile

This article summarises a recent publication by the AntarcticGlaciers.org author Bethan Davies and colleagues on glaciolacustrine sediment-landform assemblages in Chilean Patagonia: Davies, B. J., Thorndycraft, V. R., Fabel, D. & Martin, J. R. V. Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia. Quaternary Science Reviews 200, 287-312, (2018). Ice-dammed lakes in Patagonia …

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Glacial Lakes

Glaciers and lakes are intrinsically connected. Lakes form when meltwater ponds, and this can happen on the ice surface (supraglacial lakes), in front of the ice (proglacial lakes), or even underneath the ice (subglacial lakes). Glacier lakes can affect ice flow by reducing friction at the ice-bed interface, encouraging basal sliding. They can change the …

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Glacial Lake Outburst Floods

A glacial lake outburst flood (GLOF) is a release of meltwater from a moraine- or ice-dam glacial lake due to dam failure1,2. GLOFs often result in catastrophic flooding downstream, with major geomorphic and socioeconomic impacts3,4. GLOFs have three main features: They involve sudden (and sometimes cyclic) releases of water. They tend to be rapid events, …

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Epishelf lakes

This page is mostly sourced from Davies et al. 2017, and focuses on the epishelf lakes at Ablation Point Massif, Alexander Island, Antarctic Peninsula. Read the full paper here: Davies, B.J., Hambrey, M.J., Glasser, N.F., Holt, T., Rodés, A., Smellie, J.L., Carrivick, J.L., Blockley, S.P.E., 2017. Ice-dammed lateral lake and epishelf lake insights into Holocene …

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Jökulhlaups

This page is based on an article by Dr Jonathan Carrivick that appeared in Geology Today. Introduction | Geological importance of jökulhlaups | Deglacial association of jökulhlaups | Case study: volcanically-triggered jökulhlaups at Eyafjallajökull, Iceland | Comments | Introduction Jökulhlaups, or glacial outburst floods (GLOFS) are a key part of the deglaciation of alpine mountains …

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Glacier hydrology

Introduction | Supraglacial hydrology | Englacial hydrology | Subglacial hydrology | Proglacial drainage | References | Comments | Introduction Glacier hydrology is the study of the flow of water through glaciers. It is a mysterious world, where water running on the surface of the glacier disappears through cracks and holes in the glaciers, and powerful …

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