Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MS: Massenspektrometrie

MS 1: Accelerator Mass Spectrometry 1

MS 1.2: Vortrag

Montag, 2. April 2001, 16:30–16:45, EB 202

Radionuclide Record in Mid-Latitude Glacial Ice from the Tien Shan Mountains (Kyrgyzstan) — •Javier Santos¹, Jürg Beer², DeWayne Cecile³, Jaromy Green³, and Hans-Arno Synal⁴ — ¹University of Seville, c/o ETH Hönggerberg, 8093 Zürich, Switzerland — ²EAWAG, 8600 Dübendorf, Switzerland — ³USGS, Idaho Falls, USA — ⁴Paul Scherrer Institute, 8093 Zürich, Switzerland

Research is being conducted on mid-latitude glaciers worldwide to enhance our understanding of the input of radionuclides to the environment. Last summer two 160 m ice cores have been recovered from the south Inilchek Glacier(42^oN, 80^oE), a high altitude (5200 m) and cold glacier in the Tien Shan mountains, Republic of Kyrgyzstan, Central Asia. By using accelerator mass spectrometry the concentration of the long-lived radionuclides ¹⁰Be,³⁶Cl and ¹²⁹I will be measured. Primary goals of this studies are: 1) Establishing time marker of fallout events from the nuclear weapons tests in the 1950′s and 1960′s. 2) Reconstruct the fallout distribution of ³⁶Cl at mid latitudes. 3) Recovering the anthropogenic increase of ¹²⁹I in Central Asia. 4) Evaluation of ice accumulation and establishing a time scale in combination with stable isotope and major trace element data. The status of the project will be presented.