ИСТИНА

The present study of a prominent and fast eroding Yedoma cliff in the eastern Lena Delta fills a geographic gap in the extensive Yedoma Ice Complex studies in the Laptev Sea coastal region, which were undertaken during the last about two decades in Russian-German research. Joint fieldwork on Sobo-Sise Island was conducted in summer 2018 to provide a comprehensive cryostratigraphic inventory of the Yedoma Ice Complex exposed here. We combined geochronological, cryolithological, paleontological, hydrochemical and stable-water isotope approaches on frozen deposits and ground ice sampled at high resolution to obtain insights into permafrost aggradation and degradation over the last about 52 thousand years. We further deduced climatic and morphodynamic controls on regional-scale permafrost dynamics of the Central Laptev Sea coastal region in north-eastern Siberia. Beyond the paleoenvironmental focus, our study provides the baseline for further studies on erosion dynamics, and organic matter pools, characteristics and flux from land to sea that are subject to ongoing research. Запись доклада представлена на кафедральном YouTube канале: https://youtu.be/H3P6hIV_ZIc