Аннотация:An intermediate depth up to the glacier bottom ice core (181.8 m) has been recovered on the Western Plateau of the Mt. Elbrus (43°20’53.9” N, 42°25’36.0” E; 5150 m a.s.l.) in the Caucasus, Russia in 2009. This is the first ice core for the region, representing practically un-disturbed by seasonal melting paleoclimate record, with the amount of snow accumulation allowing to analyze the intra-seasonal climate proxies variability with high temporal resolution. The ice core has been analyzed for stable isotopes (δ18O and δD), micro-particle concentration, major ions (K+, Na+, Ca2+, Mg2+, NH4+, SO42−, NO3−, Cl−), black carbon (BC) and tritium content. The mean annual net accumulation derived from distinct annual oscillations of δ18O, δD, and NH4+ is 1200 mm w.e. Temperatures were measured in the boreholes on the of the Western Elbrus Plateau in 2009 and ranged from −17°C at 10 meters depth and −2.4°C at 182 m. Detailed radio-echo sounding shown glacier thickness ranged from 45 meters near marginal zone of the plateau to 255 m at the central part. The detailed analysis of whole the ice core is still an on-going process. The paper presents the content of the obtained and of the expected data and the first conclusions from the completed parts of the data evaluation. Ice core dating was made by counting annual layers on the basis of isotopic and chemical stratigraphic records (δ18O, NH4+, succinic acid). Annual layer counting was achieved down to 85 m w.e. and is in agreement with the tritium 1963 time horizon and 1912 (Katmai) sulfate peak.
https://www.czech-in.org/cm/IUGG/CM.NET.WebUI/CM.NET.WEBUI.scpr/SCPRfunctiondetail.aspx?confID=05000000-0000-0000-0000-000000000053&sesID=05000000-0000-0000-0000-000000003189&absID=07000000-0000-0000-0000-000000020817
