caa a22 4500 475827430 CHVBK 20180406123832.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/s005310000111 doi (NATIONALLICENCE)springer-10.1007/s005310000111 Variability of river discharge and Atlantic-water inflow at the Laptev Sea continental margin during the past 15,000 years: implications from maceral and biomarker records [Elektronische Daten] [B. Boucsein, K. Fahl, R. Stein] Abstract.: In order to reconstruct the depositional environment from the Laptev Sea continental slope and shelf during the past ~15,000years BP maceral analysis was carried out on two sediment cores (PS2458-4, PS2725-5) and compared with organic-geochemical parameters. During the transition from the Last Glacial to the Holocene the environment of the Laptev Sea shelf was controlled by the post-glacial sea level rise, variations in river discharge, surface-water productivity, and Atlantic-water inflow along the Eurasian continental margin. Based on our results, we identify the following significant changes of the environment: (a) at approximately 13,500years BP the first step of deglaciation (Termination 1a) is documented by the deposition of marine and fresh-water organic matter; (b) at approximately 10,400years BP the first post-glacial influence of Atlantic-water inflow along the Eastern Laptev Sea continental margin is indicated by an increase in marine organic matter; (c) at the beginning of the Holocene an increased fluvial supply is documented by an increase in fresh-water alginite; and (d) since ~9500-8000years BP modern marine conditions are established at the Laptev Sea continental margin as documented in increased amounts of marine macerals, biomarkers (dinosterol, brassicasterol, short-chain fatty acids), and dinoflagellate cysts. Springer-Verlag, 2000 Organic-carbon source Organic petrology Biomarker Arctic Ocean Laptev Sea Last Glacial Holocene Termination 1 nationallicence Boucsein B. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut Fahl K. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut Stein R. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut https://doi.org/10.1007/s005310000111 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005310000111 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boucsein B. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut NATIONALLICENCE 700 1- Fahl K. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut NATIONALLICENCE 700 1- Stein R. Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, P.O. Box 120161, 27515 Bremerhaven, Germany aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer