Classification of sorted patterned ground areas based on their environmental characteristics (Skagafjörður, Northern Iceland)

Feuillet, Thierry; Mercier, Denis; Decaulne, Armelle; Cossart, Étienne

doi:10.1016/j.geomorph.2011.12.022

Cited by 27 publications

(24 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photos of sorted patterned ground features in Iceland, including ( a ) a sorted polygon, ( b ) a sorted circle, ( c ) a large active polygon, ( d ) small active polygons, ( e ) miniature active circles, and ( f ) large stone circles(Feuillet et al 2012 ) …”

mentioning

confidence: 99%

Cryopedology

Bockheim¹

2015

View full text Add to dashboard Cite

mentioning

confidence: 99%

Cryopedology

Bockheim¹

2015

View full text Add to dashboard Cite

“…Patterned ground is also widely observed in cool to cold temperate oceanic climates such as Iceland (Feuillet et al 2012).…”

Section: Processes and Development Of Patterned Groundmentioning

confidence: 95%

“…These landforms occur where exposed ground surfaces consisting of a range of clasts sizes are affected by significant diurnal freeze-thaw cycles (Washburn 1979, Feuillet et al 2012, Hallet 2013. Patterned ground can be either a) sorted whereby surface sediments are sorted into bimodal accumulations of sediment or b) non-sorted patterned ground where vegetation cover and or soil colour can be important indications of development (Krantz 1990).…”

Section: Patterned Ground Landformsmentioning

confidence: 99%

“…The variance in terminology for the same landform process is unnecessary and in the literature sorted stone polygons and circles (Feuillet et al 2012, Hallet 2013) are the most widely used term for these features.…”

Section: Sorted Stone Circles Rings Polygons Netsmentioning

confidence: 99%

“…Patterned ground is a common phenomenon in periglacial environments in polar, subpolar and high mountain regions (Washburn 1956, Noguchi et al 1987, Boelhouwers et al 2003, Feuillet et al 2012 and has been commonly associated with freeze-thaw processes in permafrost regions (Haugland 2006) recently deglaciated areas (Haugland 2004(Haugland , 2006 and continental mountain environments (Butler and Malanson 1999).…”

Section: Processes and Development Of Patterned Groundmentioning

confidence: 99%

See 2 more Smart Citations

The distribution and paleoclimate implications of periglacial landforms in eastern Australia

Slee¹

View full text Add to dashboard Cite

It is widely recognised that during the Late Quaternary, glaciation was limited in Australia, especially away from Tasmania. This contrasts with the widely recognised occurrence of periglacial landforms in SE Australia, particularly in Australian Alps and Tasmania.However, very little research has been undertaken into these landforms. The aim of this thesis is to investigate the extent and timing of Late Quaternary periglacial conditions in south-eastern Australia and to understand the geomorphic processes and environments associated with these landforms. This thesis presents an updated understanding of the distribution, morphology and climatic significance of periglacial landforms in eastern Australia. The thesis is divided into two sections. The first section is focused on modern 'active' periglacial landforms found primarily in the mountainous areas of Tasmania and focuses on two studies of modern freeze-thaw processes in western Tasmania. At higher elevations (1000 m) notable freeze-thaw features are active at the present time including stone banked lobes on Mt Rufus. Freeze-thaw features were identified to only 150 m above sea-level near Queenstown. However, these low elevation freeze-thaw landforms are small scale features associated with short periods where shallow ground ice forms.The second section of the thesis focuses on relict periglacial landforms that display no evidence of modern activity and most likely relate to late Quaternary cold climate conditions. It primarily focuses on the block deposits of eastern Australia, their morphology, distribution and climatic significance. Block deposits and associated landslide deposits from northern New South Wales to Tasmania were mapped. Four sites were studied in more detail and dated using surface exposure dating (SED). They yielded ages ranging from early Holocene to OIS 5 which are internally consistent within sites but vary widely between sites. These data provide evidence for repeated phases of periglacial activity during the last glacial cycle. At Guyra, several phases of mass movement were recognised with large scale landslides associated with a much earlier warm and humid climate dominating the landscape. Freeze-thaw landforms of the late Quaternary are superimposed on these older forms. The scale of last glaciation cooling is indicated by evidence for a possible nivation hollow bounded by a pronival rampart located near the town of Guyra (29°30'S). From this site a cooling range of 8-11°C is inferred, but additionally, relatively moist conditions are required for the nivation feature to form.The concept of a relatively humid glaciation also emerges from the mapping of the freezethaw landforms on a regional basis. In particular the occurrence of block deposits and screes in northern New England in patterns matching the modern precipitation gradient indicates that freeze-thaw was preferentially concentrated in a zone parallel to the coast. It is inferred that this zone represented an area of intermediate moisture landward of the divide separa...

show abstract

Cryogenic Soil Activity along Bioclimatic Gradients in Northern Sweden: Insights from Eight Different Proxies

Klaus

Becher

Klaminder

2013

Permafrost & Periglacial

View full text Add to dashboard Cite

Cryogenic soil activity caused by differential soil movements during freeze-thaw cycles is of fundamental importance for Arctic ecosystem functioning, but its response to climate warming is uncertain. Eight proxies of cryogenic soil activity (including measurements of soil surface motion, vegetation and grey values of aerial photographs) were examined at eight study sites where non-sorted patterned ground spans an elevation gradient (400-1150 m asl) and a precipitation gradient (300-1000 mm yr -1 ) near Abisko, northern Sweden. Six proxies were significantly correlated with each other (mean |r| = 0.5). Soil surface motion increased by three to five times along the precipitation gradient and was two to four times greater at intermediate elevations than at low and high elevations, a pattern reflected by vegetation assemblages. The results suggest that inferences about how cryogenic soil activity changes with climate are independent of the choice of the proxy, although some proxies should be applied carefully. Four preferred proxies indicate that cryogenic soil activity may respond differently to climate warming along the elevation gradient and could be greatly modified by precipitation. This underlines the strong but spatially complex response of cryogenic processes to climate change in the Arctic.

show abstract

Classification of sorted patterned ground areas based on their environmental characteristics (Skagafjörður, Northern Iceland)

Cited by 27 publications

References 39 publications

Cryopedology

Cryopedology

The distribution and paleoclimate implications of periglacial landforms in eastern Australia

Cryogenic Soil Activity along Bioclimatic Gradients in Northern Sweden: Insights from Eight Different Proxies

Contact Info

Product

Resources

About