Alkenone temperature data from three Holocene lake sediment sequences on Svalbard ...

• Main Authors: van der Bilt, Willem G M, D'Andrea, William J, Werner, Johannes P, Bakke, Jostein
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2020
• Subjects: Alkenone; Arctic; Holocene; lake sediments; Paleoclimate; Svalbard; UK37
• Online Access: https://dx.doi.org/10.1594/pangaea.923381; https://doi.pangaea.de/10.1594/PANGAEA.923381

These data encompass three temperature Arctic temperature reconstructions that cover the entire Holocene epoch – the past 11 700 years. Temperatures were inferred using the UK37 alkenone unsaturation index after doi:10.1016/S0146-6380(86)80001-8, and the Group 1 phylotype calibration by doi:10.1016/j.gca.2015.10.031 following chemotaxonomic identification using the RIK indices after doi:10.1016/j.gca.2016.02.019. We report samples that derives from lake sediment cores taken in 2014 from three closely-spaced lakes on Arctic Svalbard (79.5°N:11°E): Gjøavatnet (n=98), Hajeren (n=67) and Hakluyt (n=90). Alkenones were isolated following ASE extraction and silica gel flash chromatography. Alkenone ratios were determined using Gas Chromatograph Ionization (GC-FID). All analytical analyses were carried out at Lamont Doherty Earth Observatory (LDEO) of Columbia University in 2016-2017. Alkenone temperatures are expressed as deviations from the 1850-1900 AD Pre-Industrial average as detailed in the Supplementary of ...