Highly branched isoprenoid, sterol, and fatty acid fluxes of sediment trap FEVI10 and FEVI13 ...

• Main Author: Fahl, Kirsten
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: fatty acids; HAUSGARTEN Long Term Observatory; IP25; terrestrial sterols; Event label; DEPTH, water; Cup; DATE/TIME; Duration, number of days; Fatty acid, flux; 24-Methylcholest-5-en-3beta-ol, flux; 24-Ethylcholest-5-en-3beta-ol, flux; 2,6,10,14-Tetramethyl-7-3-methylpent-4-enylpentadecane, flux; Mooring long time; Gas chromatography; Gas chromatography - Mass spectrometry GC-MS; ARK-XXI/1b; MSM02/4; Polarstern; Maria S. Merian; Long-term Investigation at AWI-Hausgarten off Svalbard Hausgarten; Svalbard; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.959960; https://doi.pangaea.de/10.1594/PANGAEA.959960

Two long-term mooring systems with two cone-shaped multi-sampling traps (FEVI10 and FEVI13; 2005-2007; SMT 230 K.U.M.; sampling area 0.5m2) was deployed in the HAUSGARTEN area at 79°01.00N, 04°20,62E (FEVI10) and 79°00,82N, 04° 20.5E (FEVI13).The highly branched isoprenoid IP25 as indicator for sea-ice distribution, the sterols campe- and sitosterol as proxies for terrestrial input, and the diatom-specific fatty acids (C16:1, C20:5) as well as the dinoflagellate-specific fatty acids (18:4, 22:6) were analysed by gas chromatography (GC) and/or gas chromatography-mass spectrometry (GC-MS). Biomarker analyses of campesterol (24-methylcholest-5-en-3β-ol), sitosterol (24-ethylcholest-5-en-3β-ol), fatty acids and IP25 were extracted with dichlormethane/methanol (1:1, v/v) and dichlormethane using separating funnels. For quantification of the lipid compounds, the internal standards 7-hexylnonadecane, C36 n-alkane, 19:0 FAME, and androstanol (5α-androstan-3β-ol, 20 μl/sample) were added prior to further analytical ...