气候变化领域集成服务门户(CCPortal): Investigation of a deep ice core from the Elbrus western plateau, the Caucasus, Russia

CCPortal

DOI	10.5194/tc-9-2253-2015
	Investigation of a deep ice core from the Elbrus western plateau, the Caucasus, Russia
	Mikhalenko V.; Sokratov S.; Kutuzov S.; Ginot P.; Legrand M.; Preunkert S.; Lavrentiev I.; Kozachek A.; Ekaykin A.; Fain X.; Lim S.; Schotterer U.; Lipenkov V.; Toropov P.
发表日期	2015
ISSN	19940416
卷号	9 期号:6
英文摘要	A 182 m ice core was recovered from a borehole drilled into bedrock on the western plateau of Mt. Elbrus (43° 20' 53.9" N, 42° 25' 36.0" E; 5115 m a.s.l.) in the Caucasus, Russia, in 2009. This is the first ice core in the region that represents a paleoclimate record that is practically undisturbed by seasonal melting. Relatively high snow accumulation rates at the drilling site enabled the analysis of the intraseasonal variability in climate proxies. Borehole temperatures ranged from-17 ° C at 10 m depth to-2.4 °C at 182 m. A detailed radio-echo sounding survey showed that the glacier thickness ranged from 45 m near the marginal zone of the plateau up to 255 m at the glacier center. The ice core has been analyzed for stable isotopes (δ 18O and δD), major ions (K+, Na+, Ca2+, Mg2+, NH4+, SO42-, NO3-, Cl-, F-), succinic acid (HOOCCH2COOH), and tritium content. The mean annual net accumulation rate of 1455 mm w.e. for the last 140 years was estimated from distinct annual oscillations of δ18O, δD, succinic acid, and NH4+. Annual layer counting also helped date the ice core, agreeing with the absolute markers of the tritium 1963 bomb horizon located at the core depth of 50.7 m w.e. and the sulfate peak of the Katmai eruption (1912) at 87.7 m w.e. According to mathematical modeling results, the ice age at the maximum glacier depth is predicted to be ∼ 660 years BP. The 2009 borehole is located downstream from this point, resulting in an estimated basal ice age of less than 350-400 years BP at the drilling site. The glaciological and initial chemical analyses from the Elbrus ice core help reconstruct the atmospheric history of the European region. © 2015 Author(s).
学科领域	bedrock; borehole; climate prediction; glaciochemistry; ice core; ice thickness; numerical model; paleoclimate; paleotemperature; proxy climate record; snow accumulation; stable isotope; Alaska; Caucasus; Europe; Katmai; Mount Elbrus; Russian Federation; United States
语种	英语
scopus关键词	bedrock; borehole; climate prediction; glaciochemistry; ice core; ice thickness; numerical model; paleoclimate; paleotemperature; proxy climate record; snow accumulation; stable isotope; Alaska; Caucasus; Europe; Katmai; Mount Elbrus; Russian Federation; United States
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119775
作者单位	Institute of Geography, Russian Academy of Sciences, Moscow, Russian Federation; Arctic Environment Laboratory, Faculty of Geography, Lomonosov Moscow State University, Moscow, Russian Federation; Univ. Grenoble Alpes, CNRS, Laboratoire de Glaciologie et Geophysique de l'Environnement, Grenoble, France; Arctic and Antarctic Research Institute, St. Petersburg, Russian Federation; Climate and Environmental Physics Group, University of Bern, Bern, Switzerland; St. Petersburg State University, St. Petersburg, Russian Federation; Observatoire des Sciences de l'Univers de Grenoble, CNRS, Universite Joseph Fourier Grenoble, Saint Martin d'Heres, France; Department of Meteorology and Climatology, Faculty of Geography, Lomonosov Moscow State University, Moscow, Russian Federation; Department of Earth and Environmental Sciences, Korea University, Seoul, South Korea
推荐引用方式 GB/T 7714	Mikhalenko V.,Sokratov S.,Kutuzov S.,et al. Investigation of a deep ice core from the Elbrus western plateau, the Caucasus, Russia[J],2015,9(6).
APA	Mikhalenko V..,Sokratov S..,Kutuzov S..,Ginot P..,Legrand M..,...&Toropov P..(2015).Investigation of a deep ice core from the Elbrus western plateau, the Caucasus, Russia.Cryosphere,9(6).
MLA	Mikhalenko V.,et al."Investigation of a deep ice core from the Elbrus western plateau, the Caucasus, Russia".Cryosphere 9.6(2015).