Reconstruction of glacier fluctuation (East Siberia, Russia) during the last 160 years based on high-resolution geochemical proxies from proglacial lake bottom sediments of the Baikalsky Ridge
| Autor: | V. V. Zvereva, M. S. Melgunov, A. P. Fedotov, V.A. Trunova, V.V. Maksimovskaya |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
geography
geography.geographical_feature_category Ecology Terrigenous sediment Geography Planning and Development Tidewater glacier cycle Glacier Cirque glacier Structural basin Pollution Glacier mass balance Ridge Physical geography Computers in Earth Sciences Meltwater Waste Management and Disposal Geomorphology Geology |
| Zdroj: | International Journal of Environmental Studies. 69:806-815 |
| ISSN: | 1029-0400 0020-7233 |
| DOI: | 10.1080/00207233.2012.712787 |
| Popis: | The object of our study is a cirque glacier located in an alpine-type terrain near Mount Chersky in the Baikalsky Ridge, about 18 km to the west of the northern basin of Lake Baikal (Russia). We analysed a sediment record from the pro-glacial Lake Gitara of this glacier by X-ray fluorescent technique with synchrotron radiation (equipment of Multiple Access Centre SSTRC within the framework of State Contract 16.552.11.7044) at 1 mm scan resolution. The depth–age model of the core was constructed by 210Pb and 137Cs activity using the constant rate of supply model. The intensity of the glacier fluctuation for the last 160 years was calculated from the ratio of terrigenous elements supplied into Lake Gitara with meltwater. We defined five (c. 1880, 1905, 1918, 1950 and from 1968 to the present) significant periods of increased glacier flow for the last 160 years. The periods centred on 1905 and 1918 were probably characterised by the advance of the glacier, while its retreat was recorded in c. 1880, 1950 and ... |
| Databáze: | OpenAIRE |
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