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Triggers for multiple glacier detachments from a low-angle valley glacier in the Amney Machen Range, eastern Tibetan Plateau
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SYSNO ASEP 0575644 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Triggers for multiple glacier detachments from a low-angle valley glacier in the Amney Machen Range, eastern Tibetan Plateau Tvůrce(i) Zou, C. (CN)
Jansen, John D. (GFU-E) ORCID, SAI
Carling, P. A. (GB)
Dou, X. (CN)
Wei, Z. (CN)
Fan, X. (CN)Číslo článku 108867 Zdroj.dok. Geomorphology. - : Elsevier - ISSN 0169-555X
Roč. 440, November (2023)Poč.str. 15 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova ice avalanche ; glacier detachment ; climate change ; Tibetan Plateau Obor OECD Physical geography Způsob publikování Omezený přístup Institucionální podpora GFU-E - RVO:67985530 UT WOS 001106725300001 EID SCOPUS 85168808554 DOI https://doi.org/10.1016/j.geomorph.2023.108867 Anotace Large-scale ice avalanches initiated from low-angle glaciers (also known as glacier detachment) remain a scarcely studied and poorly understood phenomenon. Here we re-evaluated the repeat glacier detachments of a low angle (-14 degrees) surging valley glacier in the Amney Machen Range, eastern Tibetan Plateau. Four glacier detachments recorded over a 15-year period (2004-2019) are described in detail based on the combination of satellite image analyses, additional terrain profile analyses and field data. To identify what triggered these high magnitude events, the glacier fluctuations, seismicity, lithology, and regional climate were examined. We find that the factors favouring glacier detachments were anomalous warming, subglacial hydrology, repeated glacier surging, a soft glacier bed, and ice-rock loading from the glacier headwall, though the relative influence of each factor varied in the four events we studied. We confirmed the observation of Paul (2019) that additional ice-rock debris loadings from the headwall were the most important factor for all events. The 2004 event probably was a delayed response to ice-rock loading during the preceding months. The latter three events may have been affected by short-term climate anomalies. The events of 2007 and 2016 were associated with anomalously high temperature: abrupt warming preceded the 2007 event and 2016 was the warmest year on record. The 2019 event followed sustained precipitation and high summer temperatures. Based on the spatial patterns in glacier change, we suggest that climate warming played a limited role in initiation. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0169555X23002878
Počet záznamů: 1