Abstract Recent acceleration of rock glaciers is well recognized in the European Alps, but similar behavior hardly documented elsewhere. Also, controlling factors are not fully understood. Here we provide evidence for a glacier complex northern Norway, from 62 years remote sensing data. Average annual horizontal velocity measured by aerial feature tracking increased ~0.5 myr −1 (1954–1977) to ~3.6 (2006–2014). Measured satellite synthetic aperture radar offset‐tracking, averages ~4.9 ~9.8...

Abstract Recent accounts suggest that periglacial processes are unimportant for large-scale landscape evolution and true landscapes rare or non-existent. The lack of a topographical fingerprint due to may be considered little relevance, as linear process–landscape development relationships rarely can substantiated. Instead, classified in terms specific landform associations. We propose “cryo-conditioning”, defined the interaction cryotic surface subsurface thermal regimes geomorphic , an...

Abstract. Sorted soil circles are a form of periglacial patterned ground that is commonly noted for its striking geometric regularity. They consist an inner fine domain bordered by gravel rings rise some decimetres above the domain. Field measurements and numerical modelling suggest these features develop from convection-like circulation in active layer permafrost. The related cyclic burial exhumation material believed to play important role carbon cycle high latitudes. connection sorted...

Internal structures in four rock glaciers the continuous permafrost zone on island of Prins Karls Forland, western Svalbard (78°50′N,10°30′E), were studied utilizing ground penetrating radar (GPR). A comparative study was performed Brøggerbreen glacier close to Ny-Ålesund, about 50 km east. The bedrock interface visible some GPR profiles. Further, length profiles revealed a system reflectors that comparable between different glaciers. layering structure parallel with surface upper part talus...

Abstract Alpine permafrost and frost‐related geomorphological processes are sensitive to climatic change. Thus, there is an increasing demand for maps in high‐alpine environments. The objective of this paper present the application terrain analysis classification based on digital elevation models (DEMs) together with remotely sensed data (e.g. Landsat TM) mapping slope activity as a supplement existing methods. study reviews principles recent developments field, presents three different...

Rock glacier structure, velocity and morphology were studied on the island of Prins Karls Forland, western Svalbard (78°50′N, 10°30′E). On north-western part island, lobate rock glaciers build a 10 km long continuous transition between rockwall strandflat area. In this area, high-resolution digital elevation model (DEM) was constructed, surface measurements DC resistivity soundings carried out selected glaciers. The conceptual Haeberli Vonder Mühll is discussed for high arctic areas, where...

Abstract A study was carried out of the subrecent sediment budget a braided sandur system in U-shaped valley linked to Jostedalsbreen ice field Nordfjord, Western Norway. Special focus on (i) detection different zones with negative, positive or balanced (following Little Ice Age advance) within system, (ii) identification sources upstream Sandane and from slope systems both sides (iii) analysis entire system. combination methods applied analysis. The part found be characterised by negative...

This study discusses the timing and maximum flood level of Nedre Glomsjø outburst flood, Norway, based on sediment records retrieved from 15 bog lake basins located close to purported flooded level. The in 12 consist a distinct light‐coloured silty bed that is correlated outburst‐flood‐deposited ‘Romerike Silt Bed’ identified elsewhere region. silt recorded up certain elevation absent above this new inferred basin exceeds established landform‐induced palaeostage indicators by 5–10 m. data...

Abstract.Abstract.This paper presents a simple analytical model for estimating rock glacier age by coupling the ratio of frontal advance to total length and debris volume in present flux talus cone–rock transition zone. The was applied two glaciers at Prins Karls Forland, Svalbard. By assuming volumetric contents deforming layer between 0.3 0.4, we obtained estimates 12 ka 24 ka. corresponding average rockwall retreat rates are 0.30 0.62 mm a‐1. Considering limitations model, suggest minimum...

Abstract The frost heave and thaw consolidation of five large ploughing boulders were studied at Finse (UTM32VMN185198), southern Norway, by optical levelling from a bedrock benchmark. 3–7 cm, mainly during the early winter. Thaw starts while are still completely snow‐covered in spring, but accelerates considerably when trench snow is melted down to ground surface around boulders. During four years measurements, vertical position lowered total mean 5 mm. Boulder was well correlated square...

Abstract The article reports results from bed load transport investigations using impact sensors in Vinstra, a steep snowmelt-dominated mountain stream Central Norway. proved able to detect thresholds for entrainment. With increasing discharges surpassing the threshold entrainment, both magnitude and variance force increases, but also showing differing rating relationships on rising falling flows. Substantial was only observed during spring flood period average follow diurnal variations...

ABSTRACT Ice cover changes have affected the Svalbard Islands during Quaternary and conditioned a complex paraglacial landscape. In these remote poorly vegetated arctic areas, integration of field investigations analysis aerial images DTMs or terrestrial laser scanning, is effective in understanding landscape features changes. this work, we present results geomorphological investigation mapping two sites along Kongsfjorden NW (Ny-Ålesund Blomstrandøya). A specific focused on slope landforms...

Direct solar radiation integrated over one year is a function of latitude and time year, topographic slope , aspect shadowing control the local distribution. Recently, several spatial models have been developed which estimate balance based on digital elevation models, taking into account aspect, effects. For periglacial realm, these are both in estimating possible occurrence mountain permafrost studies active layer dynamics. In this article our aim to assess discuss sensitivity validations...

Based on velocity measurements of surface and subsurface creep, sediment flux due to solifluction ploughing boulder activity were estimated in a mid-alpine site southern Norway (Finse, UTM185198). The results indicate geomorphic work performed by approximately 9 MJkm -2 -1 imply that rates under favourable conditions may be comparable or exceed those rapid mass movement obtained more alpine environments.

In this research note, we test the potential of differential carrier-phase GPS measurements (DGPS) for continuous recording slow mass wasting occurring in solifluction. DGPS is shown to be capable yielding records high temporal resolution and accuracy.

Abstract. Sorted soil circles are a conspicuous form of periglacial patterned ground. Numerical modelling suggests that these features develop from convection-like circulation material in the active layer permafrost. The related iterative burying and resurfacing is believed to play an important role carbon cycle high latitudes. connection sorted permafrost conditions its changes over time make ground forms potential paleoclimatic indicator. In this study we apply photogrammetric...

During the last deglaciation of southern Norway, a glacial lake (Nedre Glåmsjø) was dammed between remnants continental ice sheet and lowest pass on main watershed towards Trøndelag. When drained subglacially, some water had to flow across valley divide escape, during this event huge canyon (Jutulhogget) cut down into bedrock. The details drainage have not been resolved. question concerns whether once for all, or channel through closed so that several jökulhlaups were possible. In paper, we...

Rock glacier structure, velocity and morphology were studied on the island of Prins Karls Forland, western Svalbard (78°50′N, 10°30′E). On north-western part island, lobate rock glaciers build a 10 km long continuous transition between rockwall strandflat area. In this area, high-resolution digital elevation model (DEM) was constructed, surface measurements DC resistivity soundings carried out selected glaciers. The conceptual Haeberli Vonder Mühll is discussed for high arctic areas, where...