Permafrost NE Sibiria

Studies of the past climatic and environmental fluctuations during the Late Quaternary warm stages, including the Holocene interglacial, are important for understanding modern trends in the Earth system dynamics and to distinguish natural and human impacts on the future climate and environments.
The project “Interstadial and interglacial periods of the late Quaternary paleoenvironment of the Arctic reconstructed bybioindicators in permafrost sequences of NE Sibiria” aims to provide an objective reconstruction of the highly vulnerable to the global and regional warming permafrost environments, using several bioindicators (pollen, plant macrofossils, rhizopods, and chironomids) as a primary source of information, which is anticipated to play an important role in the regional to global-scale syntheses and in the data-model comparisons. To accomplish proposed tasks several representative permafrost sequences and lake sediment cores are analyzed. Special attention is paid to the adequate dating and reliability of the reconstructions by means of ¹⁴C, OSL, IR-RF, and ²³⁰Th/U. The study is focused on the quantitative reconstructions and comparative analyses of the environmental dynamics in NE Siberia during the Late Quaternary interglacials (Kazantsevo, Holocene) and interstadials (Karginsky, Allerød), which can be viewed as scenarios of the XXI century climate warming in this economically very important region.
Best modern analogue numerical approach tested elsewhere is used to reconstruct past vegetation and climate from the analyzed pollen records. The robustness of the results is supported by the other proxies.