Fahl, Kirsten (2023): Highly branched isoprenoid, sterol, and fatty acid fluxes of sediment trap FEVI10 and FEVI13 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.959960
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Abstract:
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 steps. The different compounds (IP25 and sterols) were separated via open column chromatography (SiO2) using n-hexane (for the hydrocarbons) and ethyl acetate/n-hexane (20:80 v/v for sterols) as eluent.
The individual sterols were silylated with 500 μl BSTFA (bis-trimethylsilyl-trifluoroacet-amide) at 60°C for 2 h. After extraction with hexane, analyses were carried out. IP25 was quantified using its molecular ion m/z 350 in relation to the abundant fragment ion m/z 266 of 7-hexylnonadecane and by means of an external calibration curve (R2 = 0.9989) to balance the different responses of the used ions. Campesterol and sitosterol were quantified as trimethylsilyl ethers using the molecular ions m/z 472, and m/z 486, respectively, in relation to the molecular ion m/z 348 of androstanol. The fatty acids were qualified using an external standard mixture and quantified by 19:0 FAME.
Related to:
Salter, Ian; Bauerfeind, Eduard; Fahl, Kirsten; Iversen, Morten Hvitfeldt; Lalande, Catherine; Ramondenc, Simon; von Appen, Wilken-Jon; Wekerle, Claudia; Nöthig, Eva-Maria (2023): Interannual variability (2000–2013) of mesopelagic and bathypelagic particle fluxes in relation to variable sea ice cover in the eastern Fram Strait. Frontiers in Earth Science, 11, 1210213, https://doi.org/10.3389/feart.2023.1210213
Project(s):
Coverage:
Median Latitude: 79.019860 * Median Longitude: 4.343055 * South-bound Latitude: 79.016940 * West-bound Longitude: 4.341670 * North-bound Latitude: 79.022780 * East-bound Longitude: 4.344440
Date/Time Start: 2005-08-25T00:00:00 * Date/Time End: 2007-06-20T00:00:00
Minimum DEPTH, water: 179 m * Maximum DEPTH, water: 230 m
Event(s):
FEVI10 (PS68/263-1, HGIV) * Latitude: 79.016940 * Longitude: 4.344440 * Date/Time Start: 2005-08-25T00:00:00 * Date/Time End: 2006-08-20T00:00:00 * Elevation: -2530.0 m * Location: North Greenland Sea * Campaign: ARK-XXI/1b (PS68) * Basis: Polarstern * Method/Device: Mooring (long time) (MOORY)
FEVI13 (MSM2/787-1, HGIV) * Latitude: 79.022780 * Longitude: 4.341670 * Date/Time Start: 2006-08-26T00:00:00 * Date/Time End: 2007-06-20T00:00:00 * Elevation: -2540.0 m * Campaign: MSM02/4 * Basis: Maria S. Merian * Method/Device: Mooring (long time) (MOORY)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Fahl, Kirsten | |||
| 2 | DEPTH, water | Depth water | m | Fahl, Kirsten | Geocode – trap depth | |
| 3 | Cup | Cup | Fahl, Kirsten | |||
| 4 | DATE/TIME | Date/Time | Fahl, Kirsten | Geocode – start | ||
| 5 | DATE/TIME | Date/Time | Fahl, Kirsten | Geocode – end | ||
| 6 | Duration, number of days | Duration | days | Fahl, Kirsten | ||
| 7 | Fatty acid, flux | Fatty acid flux | µg/m2/day | Fahl, Kirsten | Gas chromatography | (C16:1)+(C20:5) flux |
| 8 | Fatty acid, flux | Fatty acid flux | µg/m2/day | Fahl, Kirsten | Gas chromatography | (C18:4)+(C22:6) flux |
| 9 | 24-Methylcholest-5-en-3beta-ol, flux | Campesterol flux | µg/m2/day | Fahl, Kirsten | Gas chromatography - Mass spectrometry (GC-MS) | |
| 10 | 24-Ethylcholest-5-en-3beta-ol, flux | b-Sitosterol flux | µg/m2/day | Fahl, Kirsten | Gas chromatography - Mass spectrometry (GC-MS) | |
| 11 | 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, flux | IP25 flux | µg/m2/day | Fahl, Kirsten | Gas chromatography - Mass spectrometry (GC-MS) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
259 data points