The active temperate glacial landsystem: a model based on Breiðamerkurjökull and Fjallsjökull, Iceland

Evans, David J. A.; Twigg, David

doi:10.1016/s0277-3791(02)00019-7

Cited by 233 publications

(361 citation statements)

References 83 publications

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“…There are six surficial geology map units around the margin of Satujökull, the sedimentary and geomorphic characteristics of which are not unlike those previously described on similar maps of the forelands of Icelandic glaciers (Evans and Twigg, 2002;Evans et al, 2006;2009). Unrelated to the historical glacial landsystems of Satujökull are areas of volcanic bedrock and residuum.…”

Section: Sediment-landform Associations At Satujökullmentioning

confidence: 88%

“…Evans and Rea, 1999;2003;Evans and Twigg, 2002;Evans et al, 2006;2009). Complexity in the glacial geomorphological record occurs where contrasting landsystems are inset/nested or superimposed on the same glacier foreland due to spatial and temporal changes in glacier dynamics (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Complexity in the glacial geomorphological record occurs where contrasting landsystems are inset/nested or superimposed on the same glacier foreland due to spatial and temporal changes in glacier dynamics (e.g. Krüger, 1994;Evans and Twigg, 2002). Consequently, landsystem mapping can facilitate the recognition of temporal and spatial changes in glacier behaviour in the landscape record.…”

Section: Introductionmentioning

confidence: 99%

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Satujökull glacial landsystem, Iceland

2010

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A surficial geology and geomorphology map of the Satujökull foreland of the northern Hofsjökull ice cap in central Iceland provides a clear signature of spatial and temporal change in glacial landsystem signatures as a result of complex glacier behaviour in the historical period. Landsystem 1, indicative of polythermal conditions, comprises a wide arc of ice-cored moraine and controlled moraine ridges lying outside a fluted and drumlinized terrain and demarcates the historical Little Ice Age maximum limit. Landsystem 2 contains most of the diagnostic criteria for the surging glacier landsystem and records two separate surges by the western margin of Satujökull in the period since the attainment of the Little Ice Age maximum advance.

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Section: Sediment-landform Associations At Satujökullmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Satujökull glacial landsystem, Iceland

2010

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“…The continued evolution of the (Howarth & Welch 1969a, b). A high quality version of this map is available online at: http:///www.informaworld.com/RSGJ BreiDamerkurjo¨kull eskers would be later elucidated after another 20 years of landscape development by Evans and Twigg (2002;see below). Further evidence of the evolution of glacifluvial features on an historical timescale at BreiDamerkurjo¨kull was provided through comparison of the various maps produced between 1904(Price & Howarth, 1970.…”

Section: The Breiðamerkurjo¨kull Project 1964-67mentioning

confidence: 99%

“…The 1998 map (Evans & Twigg, 2000;Figure 5) was produced at a scale of 1:30,000 and designed for ease of comparison with the 1945 and 1965 maps. The three maps were published together with an exhaustive treatment of the glacier recession history, glacial geomorphology and glacial sedimentology by Evans and Twigg (2002) in an effort to update and refine Price's (1969) landsystem model (see below).…”

Section: Breiðamerkurjo¨kull Revisited (1998)mentioning

confidence: 99%

Glacial Geomorphology at Glasgow

Evans

2009

Scottish Geographical Journal

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This paper reviews a century of geographical contributions at the University of Glasgow to the development of glacial geomorphology. Significant advances were made from the 1960s, when geographers and topographic scientists began to combine geomorphic and survey expertise in accurately charting spatial and temporal changes in Icelandic glacier snouts and proglacial landforms, providing modern analogues for process-form models (the first glacial landsystems model) and a methodological avenue for quantification. Subsequent expeditions and research projects, involving a range of Glasgow academics, doctoral students and undergraduates, often in collaboration with researchers based elsewhere, have led to numerous conceptual and methodological refinements -and on occasion significant recasting -of this pioneering work. A detailed review is provided of these many contributions, seeking to elaborate their significance against a wider horizon of inquiry into glaciated landscapes, past and present.

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Structural evolution triggers a dynamic reduction in active glacier length during rapid retreat: Evidence from Falljökull, SE Iceland

et al. 2014

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Over the past two decades Iceland's glaciers have been undergoing a phase of accelerated retreat set against a backdrop of warmer summers and milder winters. This paper demonstrates how the dynamics of a steep outlet glacier in maritime SE Iceland have changed as it adjusts to recent significant changes in mass balance. Geomorphological evidence from Falljökull, a high-mass turnover temperate glacier, clearly shows that between 1990 and 2004 the ice front was undergoing active retreat resulting in seasonal oscillations of its margin. However, in 2004However, in -2006 this glacier crossed an important dynamic threshold and effectively reduced its active length by abandoning its lower reaches to passive retreat processes. A combination of ice surface structural measurements with radar, lidar, and differential Global Navigation Satellite Systems data are used to show that the upper active section of Falljökull is still flowing forward but has become detached from and is being thrust over its stagnant lower section. The reduction in the active length of Falljökull over the last several years has allowed it to rapidly reequilibrate to regional snowline rise in SE Iceland over the past two decades. It is possible that other steep, mountain glaciers around the world may respond in a similar way to significant changes in their mass balance, rapidly adjusting their active length in response to recent atmospheric warming.

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The active temperate glacial landsystem: a model based on Breiðamerkurjökull and Fjallsjökull, Iceland

Cited by 233 publications

References 83 publications

Satujökull glacial landsystem, Iceland

Satujökull glacial landsystem, Iceland

Glacial Geomorphology at Glasgow

Structural evolution triggers a dynamic reduction in active glacier length during rapid retreat: Evidence from Falljökull, SE Iceland

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