Internal Structure and Environmental Significance of a Perennial Snowbank, Melville Island, N.W.T.

Lewkowicz, Antoni G.; Harry, D. G.

doi:10.14430/arctic1521

Cited by 8 publications

(15 citation statements)

References 11 publications

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“…The gradual increase in degraded areas is predominantly being caused by climatic factors induced geomorphic processes [4,12,14]. Especially the presence of heavy and wet snow in the spring period [15], which disrupts a continuous vegetation cover [4], opens the way for the realisation of other destructive processes [16].…”

Section: Development and Dynamics Of Dmf Categoriesmentioning

confidence: 99%

“…Therefore, less snow is blown away from the upper parts of the slope load into the area of avalanche kettle. In the spring season, the slopes are covered with less snow in firn snowfields, which are considered to be the source of snow abrasion [16]. Fewer surfaces being damaged by snow abrasion reduces the area where the impact of other morphogenetic processes linked to an avalanche deposition zone is recorded.…”

Section: The Period From 1961 To 2003mentioning

confidence: 99%

“…However, the enlargement of woody vegetation located below erosiveavalanche chutes by 0.3749 ha suggests that soil degradation processes destroy the surface in situ, but do not have an impact on lower-situated locations. It may be the case of the processes determined by the presence of heavy and wet snow in the spring period [14,15], which disrupts a continuous vegetation cover and so opens the way for the realisation of other destructive processes [16].…”

Section: The Period From 2003 To 2009mentioning

confidence: 99%

“…The highest tendency to change was recorded with the surfaces in the initial stage of destruction. Their vegetation cover is not compact anymore and thus is open to the influence of a wide range of geomorphological processes [4,16], which can be shown as polygenetic forms of soil destruction. On the other hand, they are still covered with relatively dense vegetation, which, in case of eliminated destructive factors, is able to cover an exposed substrate to a certain extent [32], especially if rich in nutrients.…”

Section: The Period From 2009 To 2012mentioning

confidence: 99%

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Dynamics of development and variability of surface degradation in the subalpine and alpine zones (an example from the Velká Fatra Mts., Slovakia)

Lepeška

2016

Open Geosciences

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Abstract:In the last five centuries, the inappropriate management of the Veľká Fatra Mts. sub-alpine and alpine areas has led to the development of different forms of surface destruction. For evaluation of the dynamics and variability of surface degradation the territory of the Hornojelenská valley was chosen. It is a significant avalanche area. It has clearly been destroyed by avalanches, water erosion and cryogenic erosion as well as anthropo-zoogenic processes In the mid-1960s, there were ambitions to reforest the highest areas of the study area that led to the decrease of DMF and the development of vegetation. The present exogenous geomorphologic processes are causing a gradual increase of the total destructed area.

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Section: Development and Dynamics Of Dmf Categoriesmentioning

confidence: 99%

Section: The Period From 1961 To 2003mentioning

confidence: 99%

Section: The Period From 2003 To 2009mentioning

confidence: 99%

Section: The Period From 2009 To 2012mentioning

confidence: 99%

See 2 more Smart Citations

Dynamics of development and variability of surface degradation in the subalpine and alpine zones (an example from the Velká Fatra Mts., Slovakia)

Lepeška

2016

Open Geosciences

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“…The core of a snow bed is built up by multiple years of repeated basal ice growth and this ice can be rather old. For instance, Lewkowicz and Harry (1991) , based on five measurements made in 2012), whereas the overlying windcompacted seasonal end-of-winter snow has an average density of 250-350 kg m -3 (Woo and others, 1983). Semi-permanent snow is subject to variations in accumulation and ablation depending on vagaries of climate.…”

Section: Evolution Of Semi-permanent Snow Covermentioning

confidence: 99%

Disappearing semi-permanent snow in the High Arctic and its consequences

Woo

Young²

2014

J. Glaciol.

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ABSTRACT. Semi-permanent snow is part of the continuum between seasonal snow and glacier ice. Although ubiquitous in the High Arctic, most late-lying snow banks and snow beds have lost their perennial status over the past decade as the summers have become progressively warmer. The loss over the past decade is the most unprecedented since aerial photography of the Canadian Arctic islands was first undertaken over half a century ago, and it has produced observable thermal, hydrological and ecological impacts. Where the ground has become exposed beneath the perennial snow cover, seasonal ground thaw has deepened. Tundra ponds and patchy wetlands fed principally by meltwater in the summer have suffered water-level decline or desiccation. The water balance of headwater basins is also affected, losing a buffering vehicle that accumulates storage surplus from the wet cool years to support streamflow and evaporation in the dry warm years. The tundra vegetation, already sparse, undergoes changes in the long term. As an essential source of water in the polar desert environment, the widespread distribution of semi-permanent snow magnifies its Arctic-wide importance.

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The southernmost Quaternary niche glacier system in Great Britain

2015

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Until recently, the scientific consensus has been that the uplands of south‐west Britain remained unglaciated throughout the Quaternary, with glacial ice sheet limits lying to the north of the south‐west peninsula. However, recent work has shown that small glaciers and ice caps existed in the uplands of Exmoor and Dartmoor during the late Quaternary, demonstrating that the consensus of an unglaciated south‐west Britain requires considerable revision. Here we report geomorphological and sedimentary evidence supported by glacier‐climate modelling for a Quaternary niche glacier from west Cornwall, south‐west England. This niche glacier represents the southernmost such system from mainland Great Britain, and provides evidence for the presence of extra‐glacial niche glaciers probably during the Last Glacial Maximum of the Devensian glaciation, and well outside the limits of the main British–Irish Ice Sheet.

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Internal Structure and Environmental Significance of a Perennial Snowbank, Melville Island, N.W.T.

Cited by 8 publications

References 11 publications

Dynamics of development and variability of surface degradation in the subalpine and alpine zones (an example from the Velká Fatra Mts., Slovakia)

Dynamics of development and variability of surface degradation in the subalpine and alpine zones (an example from the Velká Fatra Mts., Slovakia)

Disappearing semi-permanent snow in the High Arctic and its consequences

The southernmost Quaternary niche glacier system in Great Britain

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