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Estimation of atmospheric paleo-circulation based on isotope composition of ice wedges |
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| Authors: | I D Streletskaya A A Vasiliev V P Melnikov G E Oblogov |
| Institution: | 1. Geography Department, Moscow State University, Moscow, Russia 2. Institute of Earth’s Cryosphere, Tyumen Scientific Center, Siberian Branch, RAS, Tyumen, Russia 3. Tyumen State Oil and Gas University, Tyumen, Russia |
| Abstract: | Cryostratigraphy of frozen late-Pleistocene sediments was studied in natural exposures at the Arctic coastal area. The isotope composition of ice wedges was determined. The data base on isotope composition of syngenetic ice wedges and modern elementary ice veins was compiled for the Eurasian Arctic based on obtained data and available literature sources. Spatial distribution of the isotope composition of ice wedges, which indicates paleo-climatic conditions, was determined separately for Marine Isotope Stages (MISs) from MIS 1 to MIS 4 for the Eurasian Arctic. The pattern of this distribution has remained stable during the last 50 000 years, which indicates a stable trend in atmospheric circulation from 50 000 yr BP to the present. |
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