High latitude northern Eurasian regions, their vulnerabilty to climate change and the contributions of the KÖPPEN-Laboratory to decipher modes and rates of environmental change
|Lead Author||Grigory, Fedorov|
|Institution Contact||Saint-Petersburg State University, University Emb. 7/9 199034 St.Petersburg Russia|
|Co-Authors||Andrey Zhirov, Saint-Petersburg State University, Russia Jörn Thiede, Saint-Petersburg State University, Russia Larisa Savelieva, Saint-Petersburg State University, Russia Vladimir Sharin, Saint-Petersburg State University , Saint-Petersburg (1); Polar Marine Geosurvey Expedition, Lomonosov, Russia (2) Vladislav Kuznetsov, Saint-Petersburg State University, Russia|
|Theme||Theme 1: Vulnerability of Arctic Environments|
|Session Name||1.1 Climate Change and Environmental Management in the Arctic|
|Datetime||Wed, Sep 14, 2016 02:00 PM - 02:20 PM|
|Abstract text||The paleoclimates of the youngest geological past are characterized by the great variability between Glacials and Interglacials, which follow each other in a cyclical pattern (Milankovitch frequencies). This is of high socioeconomic relevance because our highly developed societies with their complex technologies urgently need scientifically based „early warning systems“ of the imminent climatic changes in the future. The Köppen-Laboratory of SPbGU tries to contribute to the question what this change may mean for the landscapes of the high Arctic and seas through producing 1) detailed paleogeographic and paleogeomorphologic maps; 2) providing precise dating of young sediment sequences and changes of their depositional regimes and 3) studying the fresh water fluxes from eastern Siberia into the Arctic Ocean. It is now well understood that the latter is a very important parameter for understanding global climate change in the course of the youngest geological past. The Köppen-Laboratory has the unique possibility of resolving the question if the fast changing Arctic environments can be used as „early warning systems“ for future changes.
The large-scale geomorphological and Quaternary deposits maps have been created for the Svalbard Archipelago regions. An overview analytical geomorphological map of the Arctic has been composed in cooperation with Vniiokeangeologiya (St. Petersburg). The same scale orographical map of the Arctic is created now. None of these studies can be carried out without precise geochronological studies of the mid-late Pleistocene/Holocene sequences. We pay special attention on application and development of such palaeogeographical methods as micropaleontological (pollen, foraminiferal) analysis, geochemistry (elemental analysis), radioisotope (14C, U-series) dating. Applying a comprehensive approach we have analyzed a number of the Upper and Middle Interglacial/Interstadial deposits from the northern regions of the East European Plain and Siberia. The joint Russian-German expeditions “Lena-2009-2012" resulted in creation of the “Photographic Atlas of Plants and Pollen of the Lena River“.
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