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Meteorological factors driving glacial till variation and the associated periglacial debris flows in Tianmo Valley, south-eastern Tibetan Plateau
Deng, Mingfeng1,2; Chen, Ningsheng1; Liu, Mei1,2
Corresponding AuthorNingsheng Chen
2017
Source PublicationNATURAL HAZARDS AND EARTH SYSTEM SCIENCES
ISSN1561-8633
Volume17Issue:3Pages:345-356
SubtypeArticle
Abstract

Meteorological studies have indicated that high alpine environments are strongly affected by climate warming, and periglacial debris flows are frequent in deglaciated regions. The combination of rainfall and air temperature controls the initiation of periglacial debris flows, and the addition of meltwater due to higher air temperatures enhances the complexity of the triggering mechanism compared to that of storm-induced debris flows. On the south-eastern Tibetan Plateau, where temperate glaciers are widely distributed, numerous periglacial debris flows have occurred over the past 100 years, but none occurred in the Tianmo watershed until 2007. In 2007 and 2010, three large-scale debris flows occurred in the Tianmo Valley. In this study, these three debris flow events were chosen to analyse the impacts of the annual meteorological conditions, including the antecedent air temperature and meteorological triggers. The remote sensing images and field measurements of the adjacent glacier suggested that sharp glacier retreats occurred in the 1 to 2 years preceding the events, which coincided with spikes in the mean annual air temperature. Glacial till changes providing enough active sediment driven by a prolonged increase in the air temperature are a prerequisite of periglacial debris flows. Different factors can trigger periglacial debris flows, and they may include high-intensity rainfall, as in the first and third debris flows, or continuous, long-term increases in air temperature, as in the second debris flow event.

KeywordCase-history Slopes Runoff Permafrost Magnitude Frequency Landslide Areas Environments Temperature
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.5194/nhess-17-345-2017
WOS Subject ExtendedGeology ; Meteorology & Atmospheric Sciences ; Water Resources
Indexed BySCI
WOS KeywordCASE-HISTORY ; SLOPES ; RUNOFF ; PERMAFROST ; MAGNITUDE ; FREQUENCY ; LANDSLIDE ; AREAS ; ENVIRONMENTS ; TEMPERATURE
Language英语
Quartile3区
TOP
WOS SubjectGeosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS IDWOS:000396208000002
Funding OrganizationNational Natural Science Foundation of China(41190084 ; IMHE, CAS ; 41402283 ; 41371038)
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18586
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Deng, Mingfeng,Chen, Ningsheng,Liu, Mei. Meteorological factors driving glacial till variation and the associated periglacial debris flows in Tianmo Valley, south-eastern Tibetan Plateau[J]. NATURAL HAZARDS AND EARTH SYSTEM SCIENCES,2017,17(3):345-356.
APA Deng, Mingfeng,Chen, Ningsheng,&Liu, Mei.(2017).Meteorological factors driving glacial till variation and the associated periglacial debris flows in Tianmo Valley, south-eastern Tibetan Plateau.NATURAL HAZARDS AND EARTH SYSTEM SCIENCES,17(3),345-356.
MLA Deng, Mingfeng,et al."Meteorological factors driving glacial till variation and the associated periglacial debris flows in Tianmo Valley, south-eastern Tibetan Plateau".NATURAL HAZARDS AND EARTH SYSTEM SCIENCES 17.3(2017):345-356.
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