Developing Frameworks for Studies on Sedimentary Fluxes and Budgets in Changing Cold Environments

Beylich, Achim A.; Lamoureux, Scott A.; Decaulne, Armelle

doi:10.2478/v10117-011-0001-5

Cited by 23 publications

(10 citation statements)

References 33 publications

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“…The analysis of elevation changes between 1967 and 2012 (Figure b) highlights a general stability of this steep hillslope, and this despite the presence of unconsolidated materials. Nonetheless, warming periods seem to be associated with some detectable increases in both downwasting and surface displacement, something that has been observed in studies of similar environments [ Huggel et al , , ; Beylich et al , ; Fischer et al , ]. The most dynamic periods are associated with either or both higher rainfall and snowfall or greater temperatures.…”

Section: Discussion and Interpretationmentioning

confidence: 60%

Investigating decadal‐scale geomorphic dynamics in an alpine mountain setting

2015

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We know little about the effect of recent climate variability upon landscapes at the timescale of decades because of (1) the complex, nonlinear, and path‐dependent nature of the response of a landscape to climate forcing and (2) the difficulty of quantifying spatially distributed impacts at the timescale of decades to centuries, despite this being the timescale over which significant hypotheses have been raised over human impacts upon climate change and hence geomorphic systems. A unique resource to investigate the linkages between climatic variability and geomorphic response is provided by the extensive coverage of aerial imagery commonly available since the 1950s. Here we use archival digital photogrammetry to produce high‐precision digital elevation models over large spatial scales, and so to reconstruct the quantitative history of surface downwasting and sediment flux in a high mountain alpine system, over the timescales of decades. Propagation of error methods is used to identify locations of significant landscape response and to compute volumes of significant surface change. Orthorectified aerial images are used in an image correlation framework to detect horizontal and vertical displacements of components of the landscape. Results are coupled to extant climate data and modeled snow cover to show how the landscape responds to climate forcing and to geomorphological maps to understand how this response varies between landscape elements. The results show distinct landscape response to both warming and cooling periods and a tendency for the acceleration of surface displacement under warming conditions. Precipitation and snow cover are critical in controlling glacier dynamics and rock glacier displacement velocities. However, while some landforms might lead to locally high sediment flux, landscape heritage can disconnect zones of high change rates from the valley bottom. Hence, the landscape response to climate forcing is not necessarily reflected in valley system processes or sediment deposits.

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Section: Discussion and Interpretationmentioning

confidence: 60%

Investigating decadal‐scale geomorphic dynamics in an alpine mountain setting

2015

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“…; Warburton ; Beylich et al . ; Green et al . ) but these tend to highlight that, over decadal and shorter timescales, there is high variability in sediment fluxes and yields that correspond to individual events such as landslides (Johnson et al .…”

Section: Earth System Sensitivity Of Glacial and Paraglacial Environmmentioning

confidence: 99%

“…Several studies have focused on sediment fluxes within glaciated and paraglacial catchments (e.g. Zemp et al 2005;Meigs et al 2006;Warburton 2007;Beylich et al 2011;Green et al 2013) but these tend to highlight that, over decadal and shorter timescales, there is high variability in sediment fluxes and yields that correspond to individual events such as landslides (Johnson et al 2010). These events represent perturbations in the longer paraglacial sediment flux record (Ballantyne 2002a).…”

Section: Earth System Sensitivity Of Glacial and Paraglacial Environmmentioning

confidence: 99%

Mountain glacial and paraglacial environments under global climate change: lessons from the past, future directions and policy implications

Knight

Harrison

2014

Geografiska Annaler: Series A, Physical Geography

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Globally, glacial and paraglacial environments in mountains are vulnerable to the effects of ongoing contemporary climate change (global warming), but monitoring of such systems today provides only a limited spatial and temporal viewpoint of their likely evolution over coming decades to centuries. This is because these environments show complex and nonlinear responses to forcing and are affected by time lags, feedbacks and antecedent factors, including geologic control and geologic history that present monitoring of these systems cannot capture. In order to evaluate how glacial and paraglacial environments in mountains are likely to respond to future climate change, we consider how these environments have responded to climate change in the past (the last glacial–interglacial transition, and the Little Ice Age). From this, we may anticipate the likely responses of glacial and paraglacial environments in mountains to global warming over coming decades. We show that future changes in glacial and paraglacial environments, in particular in glaciated regions in continental interiors, have downstream implications for the biosphere (including biodiversity and ecosystem services, sustainable agriculture and water resources), the human environment (including cultural and heritage landscapes and social/economic activities), and for policy and planning. These will be important issues for the later twenty‐first century and beyond.

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“…Bedload is transported mainly during storm events. Hence it is the major sediment source for lowland streams (Beylich et al, 2011) and the main agent of natural hazards in mountain regions (Schumm, 1977;Schneider et al, 2014). The grain-size composition of stream bed materials indicates how streams behave in response to changes in physiographic characteristics of their catchments and streams (Harrelson et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Sediment flux dynamics as fingerprints of catchment rehabilitation: The case of western Rift Valley escarpment of northern Ethiopia

et al. 2015

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Developing Frameworks for Studies on Sedimentary Fluxes and Budgets in Changing Cold Environments

Abstract: beylich a.a., lamoureux s.f. & decaulne a., 2011. Developing frameworks for studies on sedimentary fluxes and budgets in changing cold environments.

Cited by 23 publications

References 33 publications

Investigating decadal‐scale geomorphic dynamics in an alpine mountain setting

Investigating decadal‐scale geomorphic dynamics in an alpine mountain setting

Mountain glacial and paraglacial environments under global climate change: lessons from the past, future directions and policy implications

Sediment flux dynamics as fingerprints of catchment rehabilitation: The case of western Rift Valley escarpment of northern Ethiopia

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