n-Alkane composition of organic matter in a rapidly eroding permafrost cliff ...

• Main Authors: Haugk, Charlotte, Jongejans, Loeka Laura, Mangelsdorf, Kai, Fuchs, Matthias, Ogneva, Olga, Palmtag, Juri, Mollenhauer, Gesine, Mann, Paul James, Overduin, Pier Paul, Grosse, Guido, Sanders, Tina, Tuerena, Robyn E, Schirrmeister, Lutz, Wetterich, Sebastian, Kizyakov, Alexander, Strauss, Jens
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Biomarker; Carbon; erosion; n-alkane; n-fatty acids; Siberia; Yedoma; Event label; Sample ID; Height above river level; n-Alkane C14, per unit sediment mass; n-Alkane C15, per unit sediment mass; n-Alkane C16, per unit sediment mass; n-Alkane C17, per unit sediment mass; n-Alkane C18, per unit sediment mass; n-Alkane C19, per unit sediment mass; n-Alkane C20, per unit sediment mass; n-Alkane C21, per unit sediment mass; n-Alkane C22, per unit sediment mass; n-Alkane C23, per unit sediment mass; n-Alkane C24, per unit sediment mass; n-Alkane C25, per unit sediment mass; n-Alkane C26, per unit sediment mass; n-Alkane C27, per unit sediment mass; n-Alkane C28, per unit sediment mass; n-Alkane C29, per unit sediment mass; n-Alkane C30, per unit sediment mass; n-Alkane C31, per unit sediment mass; n-Alkane C32, per unit sediment mass; n-Alkane C33, per unit sediment mass; n-Alkane C34, per unit sediment mass; n-Alkane C35, per unit sediment mass; n-Alkane C14, per unit mass total organic carbon; n-Alkane C15, per unit mass total organic carbon; n-Alkane C16, per unit mass total organic carbon; n-Alkane C17, per unit mass total organic carbon; n-Alkane C18, per unit mass total organic carbon; n-Alkane C19, per unit mass total organic carbon; n-Alkane C20, per unit mass total organic carbon; n-Alkane C21, per unit mass total organic carbon; n-Alkane C22, per unit mass total organic carbon; n-Alkane C23, per unit mass total organic carbon; n-Alkane C24, per unit mass total organic carbon; n-Alkane C25, per unit mass total organic carbon; n-Alkane C26, per unit mass total organic carbon; n-Alkane C27, per unit mass total organic carbon; n-Alkane C28, per unit mass total organic carbon; n-Alkane C29, per unit mass total organic carbon; n-Alkane C30, per unit mass total organic carbon; n-Alkane C31, per unit mass total organic carbon; Arctic; lena river; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.935658; https://doi.pangaea.de/10.1594/PANGAEA.935658

Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient ...