Ice cores are some of the best palaeoclimate archives providing unique information about the physical and chemical properties of the atmosphere. Climate of Greenland and Antarctica was reconstructed for one or more ice age cycles by ice-core data. Between 1999 and 2001, a 724 m long surface-to-bed ice core was drilled on Akademii Nauk ice cap, the thickest and coldest one on Severnaya Zemlya, to gain high-resolution proxy data from the Central Russian Arctic.
Electrical conductivity measurements (DEP) and stable water isotope analyzes in high resolution were used for core dating resulting in an age of about 2500 years for Akademii Nauk ice cap. For last 150 years stable isotope record is highly correlated with temperature measured in north Norway (Vardø). High-resolution chemical analysis of the upper core part show high concentrations of sulphate and nitrate in the 1970s caused by high anthropogenic emissions in the Siberian Arctic.
BMBF 1999-2002 – drilling, first analyzes, and dating of core
Arctic and Antarctic Research Institute (AARI), St.Petersburg, Russia
St. Petersburg State Mining Institute, Russia
Desert Research Institute, Division of Hydrologic Sciences, USA
Dept. des Science de la Terre et Environement, Section Glaciologie, Universite Libre de Bruxelles, Belgium
Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz-Institut Freiberg für Ressourcentechnologie, Dresden , Germany
Contributions from other AWI Colleagues
Dr. Hanno Meyer, Stable Isotopes
Dr. Frank Wilhelms, AWI Glaciology, Physician, dielectrical profiling (DEP)
Dr. Thomas Opel