Multitemporal glacier inventory of the French Alps from the late 1960s to the late 2000s

Gardent, Marie; Rabatel, Antoine; Dedieu, Jean-Pierre; Deline, Philip

doi:10.1016/j.gloplacha.2014.05.004

Cited by 136 publications

(135 citation statements)

References 40 publications

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“…The average glacier area loss is approximately −0.4%·a −1~− 2%·a −1 for land-terminating glaciers since the 1970s [80,81,157,160], and the reduction rate is increasing in some of the observed glaciers [157]. Over the past three decades, the reduction rate is comparably small (ca.…”

Section: Glacier Inventorymentioning

confidence: 99%

The Potential of Earth Observation for the Analysis of Cold Region Land Surface Dynamics in Europe—A Review

Kuenzer

Dietz

et al. 2017

Remote Sensing

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Abstract:Cold regions affect global, regional and local climate; oftentimes they are relevant for water supply, host valuable ecosystems, and support human livelihood. They are thus eminently important for human society. In the context of ongoing climate change, monitoring and understanding cold region land surface dynamics is essential for environmental scientists, stakeholders and decision makers. However, the definition of cold regions remains inexplicit, and no up-to-date cold region maps or overarching spatial analyses exist. For example, Europe has densely populated cold regions, but hardly an article exists that provides a solid overview of Earth Observation (EO) based applications assessing cold region land surface dynamics in Europe. With this review article we aim at closing this gap by providing an overview of EO-based techniques for cold region observation in Europe, focusing on the dynamics of glaciers and snow. We present a novel spatial delineation of cold regions for Europe before analyzing the benefits and limitations of different EO sensor types and data processing methods for EO based cold region research. Furthermore, we identify research gaps and discuss challenges for future studies.

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Section: Glacier Inventorymentioning

confidence: 99%

The Potential of Earth Observation for the Analysis of Cold Region Land Surface Dynamics in Europe—A Review

Kuenzer

Dietz

et al. 2017

Remote Sensing

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“…Ice avalanches themselves can be more frequent as basal sliding is enhanced by the abundance of meltwater in warmer summers (Clague, 2013). Glacier and permafrost retreat, which has been reported in all sectors of the Alps Fischer et al, 2014;Gardent et al, 2014;Harris et al, 2009), is a major cause of slope instabilities, which can result in debris flows by debuttressing rock and debris flanks and promot-ing the exposure of unconsolidated and ice-cored sediments (Keiler et al, 2010;Chiarle et al, 2007). Glacier downwasting causes changes in water resources, with an initial increase in discharge due to enhanced melt followed by a long-term reduction, affecting drinking water supply, irrigation and hydropower production (Kaab et al, 2005b), along with a rising occurrence of structural collapses (Azzoni et al, 2017).…”

Section: Introductionmentioning

confidence: 94%

Combination of UAV and terrestrial photogrammetry to assess rapid glacier evolution and map glacier hazards

Fugazza

Scaioni

Corti

et al. 2018

Nat. Hazards Earth Syst. Sci.

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Abstract. Tourists and hikers visiting glaciers all year round face hazards such as sudden terminus collapses, typical of such a dynamically evolving environment. In this study, we analyzed the potential of different survey techniques to analyze hazards of the Forni Glacier, an important geosite located in Stelvio Park (Italian Alps). We carried out surveys in the 2016 ablation season and compared point clouds generated from an unmanned aerial vehicle (UAV) survey, closerange photogrammetry and terrestrial laser scanning (TLS). To investigate the evolution of glacier hazards and evaluate the glacier thinning rate, we also used UAV data collected in 2014 and a digital elevation model (DEM) created from an aerial photogrammetric survey of 2007. We found that the integration between terrestrial and UAV photogrammetry is ideal for mapping hazards related to the glacier collapse, while TLS is affected by occlusions and is logistically complex in glacial terrain. Photogrammetric techniques can therefore replace TLS for glacier studies and UAV-based DEMs hold potential for becoming a standard tool in the investigation of glacier thickness changes. Based on our data sets, an increase in the size of collapses was found over the study period, and the glacier thinning rates went from 4.55 ± 0.24 m a −1 between 2007 and 2014 to 5.20 ± 1.11 m a −1 between 2014 and 2016.

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“…since the 1990s (Gilbert et al, 2012). This glacier is identified in the French glacier inventory and inherited from the disintegration of the LIA Tête-RousseGriaz-Rognes glacier complex (Gardent et al, 2014;Bosson et al, 2015). Today, under a 100 m high backwall, a debris-covered slope with few ice outcrops dominates a depressed area with marginal, rounded sediment ridges, which is terminated by a 30 m high steep slope in the northwestern part (Figure 2).…”

Section: Les Rognes Glacier Systemmentioning

confidence: 99%

Internal Structure and Current Evolution of Very Small Debris-Covered Glacier Systems Located in Alpine Permafrost Environments

Bosson

Lambiel

2016

Front. Earth Sci.

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This contribution explores the internal structure of very small debris-covered glacier systems located in permafrost environments and their current dynamical responses to short-term climatic variations. Three systems were investigated with electrical resistivity tomography and dGPS monitoring over a 3-year period. Five distinct sectors are highlighted in each system: firn and bare-ice glacier, debris-covered glacier, heavily debris-covered glacier of low activity, rock glacier and ice-free debris. Decimetric to metric movements, related to ice ablation, internal deformation and basal sliding affect the glacial zones, which are mainly active in summer. Conversely, surface lowering is close to zero (−0.04 m yr −1 ) in the rock glaciers. Here, a constant and slow internal deformation was observed (c. 0.2 m yr −1 ). Thus, these systems are affected by both direct and high magnitude responses and delayed and attenuated responses to climatic variations. This differential evolution appears mainly controlled by (1) the proportion of ice, debris and the presence of water in the ground, and (2) the thickness of the superficial debris layer.

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Multitemporal glacier inventory of the French Alps from the late 1960s to the late 2000s

Cited by 136 publications

References 40 publications

The Potential of Earth Observation for the Analysis of Cold Region Land Surface Dynamics in Europe—A Review

The Potential of Earth Observation for the Analysis of Cold Region Land Surface Dynamics in Europe—A Review

Combination of UAV and terrestrial photogrammetry to assess rapid glacier evolution and map glacier hazards

Internal Structure and Current Evolution of Very Small Debris-Covered Glacier Systems Located in Alpine Permafrost Environments

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