PAST PERMAFROST IPY ID 15: From the beginning of the Pliocene cooling to the modern warming Past Permafrost Records in Arctic Siberia

• Main Authors: Schirrmeister, Lutz, Tumskoy, V., Kuznetsova, T., Derevyagin, Alexander Yu, Kunitsky, V., Bol'shiyanov, D.
• Format: Conference Object
• Language: unknown
• Published: 2007
• Subjects: Arctic; Arctic Ocean; Atlantic Arctic; Atlantic-Arctic; Greenland; Ice; IPY; permafrost; Siberia
• Online Access: https://epic.awi.de/id/eprint/16598/; https://hdl.handle.net/10013/epic.26462

Permafrost conditions are assumed to be stable in the Siberian Arctic since probably 2.5 million years. The permafrost deposits of the Siberian lowlands are excellent climate and environmental archives and important links between marine records of the Pacific, Atlantic, Arctic Ocean, glacial records from Greenland as well as the high-resolution lacustrine records. The abundance of well-preserved bioindicators (pollen, plant macrofossils, rhizopods, chironomids, beetles, ostracods, diatoms, mammal bones) in permafrost deposits allows multiproxy paleoenvironmental reconstructions. Ground ice data and sedimentological characteristics reflect the conditions of permafrost formation and transformation. These records are also suitable datasets for climate reconstructions. Although, they are not always as highly resolved as other archives, permafrost deposits are widely distributed in Siberia and contain data of several climate stages. Moreover, they are the only available records for the validation of climate models in high latitudes of Siberia. The investigations will be focused on the New Siberian Archipelago and the Yana-Kolyma lowland, wherefrom the oldest deposits, and the most diverse stratigraphic, and facial permafrost sequences are reported. Neotectonics play an important role for the Quaternary environmental changes in this region. Moreover, the region between 130° and 150°E is assumed to be influenced by both, the Pacific and the Atlantic Ocean, and thus be sensitive for changes in atmospheric circulation patterns.The main objectives of studies on selected locations are Dating and characterization of the first tracks of permafrost in the Arctic Correlation of Pliocene/Early Pleistocene marine deposits exposed along the coasts with marine records Distribution and characterization of Saalian ice-rich deposits in Arctic shelf areas The Eemian in the Arctic and the degradation of permafrost Periglacial landscapes on the dry arctic shelf during the LGM The Holocene Arctic flood and modern patterns of coastal ...