46 research outputs found

    A report on ice core drilling on the western plateau of Mt. Belukha in the Russian Altai Mountains in 2003

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    A 171m deep ice core from the surface to the bottom has been successfully drilled on the West Belukha snow-firn Plateau in the Russian Altai Mountains in the summer of 2003. The drill system used in this project was an electro-mechanical drill with a barrel 135cm long and 9.5cm in inner diameter manufactured by Geo Tecs Co., Japan. The maximum core length for a drilling run is 55cm. It took 87.5 hours in actual working time of 7 working days to drill the core down to the bottom of the glacier. The total number of drilling runs was 325. The mean length of the drilled core was 48.6cm. Most of the cores were not brittle and had a good cylindrical shape. High air temperature above the melting point in the drilling shelter caused some trouble in drilling. One of the major troubles was slip of cutters due to adhesion of cutting tips to the cutters and shoes

    Stable-Isotope and Trace Element Time Series from Fedchenko Glacier (Pamirs) Snow/Firn Cores

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    In summer 2005, two pilot snow/firn cores were obtained at 5365 and 5206 m a.s.l. on Fedchenko glacier, Pamirs, Tajikistan, the world\u27s longest and deepest alpine glacier. The well-defined seasonal layering appearing in stable-isotope and trace element distribution identified the physical links controlling the climate and aerosol concentration signals. Air temperature and humidity/precipitation were the primary determinants of stable-isotope ratios. Most precipitation over the Pamirs originated in the Atlantic. In summer, water vapor was re-evaporated from semi-arid regions in central Eurasia. The semi-arid regions contribute to non-soluble aerosol loading in snow accumulated on Fedchenko glacier. In the Pamir core, concentrations of rare earth elements, major and other elements were less than those in the Tien Shan but greater than those in Antarctica, Greenland, the Alps and the Altai. The content of heavy metals in the Fedchenko cores is 2-14 times lower than in the Altai glaciers. Loess from Afghan-Tajik deposits is the predominant lithogenic material transported to the Pamirs. Trace elements generally showed that aerosol concentration tended to increase on the windward slopes during dust storms but tended to decrease with altitude under clear conditions. The trace element profile documented one of the most severe droughts in the 20th century

    Addressing Climate Change Around the Tibetan Plateau

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    Himalayan Climate Change Affects Regional, Global Environments

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    6th Third Pole Environment (TPE) Workshop; Columbus, Ohio, 16–18 May 2016</jats:p

    Moving forward on glacial retreat

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    Advancing Multinational Research in the Highest Mountain Regions

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    5th Third Pole Environment Workshop; Berlin, Germany, 8–9 December 2014</jats:p

    Tibetan Plateau and beyond

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    Tracking Regional Climate Change from Pole to Pole

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    8th Third Pole Environment Workshop; Gothenburg, Sweden, 24–26 September 2018</jats:p
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