Branched GDGT and crenarchaeol lipids, and bulk parameters (TOC, TN, C/N, δ¹³C and d15N) in the Yenisei River and its outflow in the Kara Sea ...

• Main Authors: De Jonge, Cindy, Stadnitskaia, Alina, Hopmans, Ellen C, Cherkashov, Georgy A, Fedotov, Andrey, Streletskaya, Irina, Vasiliev, Alexander A, Sinninghe Damsté, Jaap S
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2015
• Subjects: NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU; Kara Sea; Yenisei River; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.877971; https://doi.pangaea.de/10.1594/PANGAEA.877971

The distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in soils has been shown to correlate with pH and mean annual air temperature. Because of this dependence brGDGTs have found an application as palaeoclimate proxies in coastal marine sediments, based on the assumption that their distribution is not altered during the transport from soils to marine systems by rivers. To study the processes acting on the brGDGT distributions, we analysed the full suite of brGDGTs, including the recently described 6-Me brGDGTs, in both the suspended particulate matter (SPM) of the Siberian Yenisei River and the SPM and sediments of its outflow in the Kara Sea. The brGDGT distribution in the SPM of the Yenisei River was fairly constant and characterized by high abundances of the 6-Me brGDGTs, reflecting their production at the neutral pH of the river water. However, the brGDGT distribution showed marked shifts in the marine system. Firstly, in the Yenisei River Mouth, the fractional abundance of the 6-Me ... : Supplement to: De Jonge, Cindy; Stadnitskaia, Alina; Hopmans, Ellen C; Cherkashov, Georgy A; Fedotov, Andrey; Streletskaya, Irina; Vasiliev, Alexander A; Sinninghe Damsté, Jaap S (2015): Drastic changes in the distribution of branched tetraether lipids in suspended matter and sediments from the Yenisei River and Kara Sea (Siberia): Implications for the use of brGDGT-based proxies in coastal marine sediments. Geochimica et Cosmochimica Acta, 165, 200-225 ...