Future glacial lakes in High Mountain Asia: an inventory and assessment of hazard potential from surrounding slopes
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TLDR
In this article, the authors present the first complete inventory for future glacial lakes in High Mountain Asia by computing the subglacial bedrock for ~100 000 glaciers and estimating overdeepening area, volume and impact hazard for the larger potential lakes.Abstract:
Bedrock overdeepenings exposed by continued glacial retreat can store precipitation and meltwater, potentially leading to the formation of new proglacial lakes. These lakes may pose threats of glacial lake outburst floods (GLOFs) in high mountain areas, particularly if new lakes form in geomorphological setups prone to triggering events such as landslides or moraine collapses. We present the first complete inventory for future glacial lakes in High Mountain Asia by computing the subglacial bedrock for ~100 000 glaciers and estimating overdeepening area, volume and impact hazard for the larger potential lakes. We detect 25 285 overdeepenings larger than 104 m2 with a volume of 99.1 ± 28.6 km3 covering an area of 2683 ± 773.8 km2. For the 2700 overdeepenings larger than 105 m2, we assess the lake predisposition for mass-movement impacts that could trigger a GLOF by estimating the hazard of material detaching from surrounding slopes. Our findings indicate a shift in lake area, volume and GLOF hazard from the southwestern Himalayan region toward the Karakoram. The results of this study can be used for anticipating emerging threats and potentials connected to glacial lakes and as a basis for further studies at suspected GLOF hazard hotspots.read more
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Contrasted evolution of glacial lakes along the Hindu-Kush Himalaya mountain range between 1990 and 2009
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Glacial Lake Area Changes in High Mountain Asia during 1990–2020 Using Satellite Remote Sensing
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References
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A multi-level strategy for anticipating future glacier lake formation and associated hazard potentials
TL;DR: In this paper, a multi-level strategy for the identification of overdeepened parts of the glacier beds and, hence, sites with potential future lake formation, is presented, at the first two of the four levels of this strategy, glacier bed overdeepenings are estimated qualitatively and over large regions based on a digital elevation model (DEM) and digital glacier outlines.
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Rock avalanches and other landslides in the central Southern Alps of New Zealand: a regional study considering possible climate change impacts
TL;DR: In this article, the authors assess slope instabilities in the central Southern Alps, New Zealand, in relation to their geological and topographic distribution, with emphasis given to the spatial distribution of the most recent failures relative to zones of possible permafrost degradation and glacial recession.
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On the influence of topographic, geological and cryospheric factors on rock avalanches and rockfalls in high-mountain areas
TL;DR: In this paper, the authors investigated 56 sites with slope failures between 1900 and 2007 in the central European Alps with respect to their geological and topographical settings and zones of possible permafrost degradation and glacial recession.
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Identification of potentially dangerous glacial lakes in the northern Tien Shan
Tobias Bolch,Tobias Bolch,Juliane Peters,Alexandr Yegorov,Biswajeet Pradhan,Manfred F. Buchroithner,Victor Blagoveshchensky +6 more
TL;DR: In this article, the authors presented a comprehensive approach by coupling of remote sensing, geomorphometric analyses aided with GIS modelling for the identification of potentially dangerous glacial lakes, and identified several lakes with a medium to high potential for an outburst after classification according to their outburst probability and their downstream impact.