Using ArcticDEM to Analyse the Dimensions and Dynamics of Debris-Covered Glaciers in Kamchatka, Russia
| Autor: | Harold Lovell, Iestyn D. Barr, Jakub Małecki, Stephen J. Livingstone, Anton Muraviev, Mikhail D. Dokukin, Ioannis Kougkoulos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Lava Ice field 010502 geochemistry & geophysics Kamchatka 01 natural sciences Caldera Glacial period 0105 earth and related environmental sciences debris-covered Kluchevskoy geography geography.geographical_feature_category Global warming lcsh:QE1-996.5 Glacier Debris ArcticDEM lcsh:Geology volcano Volcano ArticDEM 13. Climate action volcanic activity General Earth and Planetary Sciences glaciers Physical geography Geology |
| Zdroj: | Geosciences Volume 8 Issue 6 Geosciences, Vol 8, Iss 6, p 216 (2018) Barr, I, Dokukin, M, Kougkoulos, I, Livingstone, S, Lovell, H, Małecki, J & Muraviev, A 2018, ' Using ArcticDEM to analyse the dimensions and dynamics of debris-covered glaciers in Kamchatka, Russia ', Geosciences, vol. 8, no. 6, 216 . https://doi.org/10.3390/geosciences8060216 |
| ISSN: | 2076-3263 |
| DOI: | 10.3390/geosciences8060216 |
| Popis: | On the Kamchatka Peninsula, a number of glaciers are covered by thick volcanic debris, which makes their margins difficult to delineate from satellite imagery. Fortunately, high resolution, multi-temporal digital surface models (DSMs) covering the entire peninsula have recently become freely available (i.e., ArcticDEM). We use these DSMs to analyse the dimensions and dynamics of debris-covered glaciers in the northern Kluchevskoy Volcanic Group, central Kamchatka. This approach demonstrates that between 2012 and 2016, some of the region&rsquo s glaciers advanced despite regional and local climate warming. These glacial advances are part of a long-term trend, presumed to reflect the role of extensive supraglacial debris in limiting ice ablation, though there is also evidence for local ice melt due to supraglacial lava/debris flows. Glacier surface velocities during the period 2012&ndash 2015 were typically 5&ndash 140 m yr&minus 1. Velocities for the major outlets of the region&rsquo s central icefield were typically higher than for other extensively debris-covered glaciers globally, likely reflecting the influence of ice supply from the high altitude Ushkovsky caldera. In all, we find ArcticDEM useful for analysing debris-covered glaciers in Kamchatka, providing important information on flow dynamics and terminus change that is difficult to derive from satellite imagery. |
| Databáze: | OpenAIRE |
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