Alkanol composition of marine and terrestrial sedimentary archives from sub-Antarctic South Georgia ...

• Main Authors: Berg, Sonja, Kusch, Stephanie, Jivcov, Sandra
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: alkanols; Fjord; lake; peat; sediments; South Georgia; Event label; Cruise/expedition; Area/locality; Site; LATITUDE; LONGITUDE; ELEVATION; Depth, bathymetric; DATE/TIME; Sample ID; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Hexadecanol of total fatty alcohols; Heptadecanol of total fatty alcohols; Octadecanol of total fatty alcohols; Nonadecanol of total fatty alcohols; Eicosanol of total fatty alcohols; Heneicosanol of total fatty alcohols; Docosanol of total fatty alcohols; Tricosanol of total fatty alcohols; Tetracosanol of total fatty alcohols; Pentacosanol of total fatty alcohols; Hexacosanol of total fatty alcohols; Heptacosanol of total fatty alcohols; Octacosanol of total fatty alcohols; n-Alkanol average chain length; Carbon Preference Index, n-Alkanols; Piston corer, UWITEC; Russian peat corer and gravity corer; Gravity corer; Gas chromatography - Flame Ionization Detection GC-FID; Calculation according to Poynter & Eglinton 1990; Calculation according to Marzi et al. 1993; ANT-XXIX/4; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.967408; https://doi.pangaea.de/10.1594/PANGAEA.967408

The dataset comprises alkanol composition data that was obtained on sediment samples from sub-Antarctic South Georgia. The sediments were collected from a range of different sites, including lakes, peat deposits, a marine inlet and a fjord during RV Polarstern expedition PS81 in 2013. Prior to the geochemical analyses reported here, the sediments were freeze-dried and ground. More details on the study sites, sampling and data evaluation can be found in Berg et al. (submitted manuscript).Alkyl lipid biomarkers were extracted by accelerated solvent extraction (ASE 300, Thermo, USA) with dichloromethane and methanol (DCM, MeOH; 9:1, v/v at 120°C, 75 bar) (cores Co1305, PS81/283, and Co1308) or via consecutive ultrasonication in DCM:Hexan (1:1), MeOH:DCM (1:1) and MeOH (core Co1306 and the peat and soil samples).The total lipid extract (TLE) was saponified with 0.5 M KOH in MeOH and water (9:1, v/v) at 80°C for 2 h. Neutral lipids (NL) were extracted from the TLE with dichloromethane by liquid-liquid phase ...