Wei, Bingbing; Holtappels, Moritz: Concentrations and loadings of fatty acids in surface sediments of Helgoland Mud Area in the North Sea [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971523 (dataset in review), In: Wei, B; Holtappels, M: Geochemical properties in surface sediments of the Helgoland Mud Area and surrounding sandy areas taken during HEINCKE cruise HE595 in the North Sea [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971520 (dataset in review)
Abstract:
Surface sediment were extracted 4 times by ultrasonication with dichloromethane: methanol (9:1, v/v) for 15 min for FAs and alkanes. For quantification of FAs and alkanes, known amounts of 19-methylarachidic acid and squalane were added as internal standards prior to extraction. Supernatants from each extraction were obtained by centrifugation and combined. The total lipid extracts were concentrated and evaporated under a nitrogen stream. The total lipid extracts were saponified for 2 h at 80 °C with 1 mL of KOH (0.1 M) in methanol: H2O (9:1, v/v). After saponification, the neutral fractions were liquid-liquid extracted with n-hexane and alkanes were eluted from the neutral fractions by silica gel column chromatography with n-hexane. The remaining KOH solution was acidified to pH 1, from which FA were liquid-liquid extracted into dichloromethane. The extracted and dried FAs were converted to methyl ester derivatives (FAMEs) in methanol: HCl (95:5, v/v) at 60 °C for 12 h. After methylation, the FAME fraction was further purified by silica gel column chromatography using dichloromethane: hexane (2:1, v/v) to remove residual polar compounds.
FAMEs and alkanes were analyzed on a 7890A gas chromatograph (GC) equipped with a DB-5MS fused silica capillary column (60 m, 250 µm, 0.25 µm) and a flame ionization detector (FID). Peak areas were determined by integrating the respective peaks and concentrations were calculated against the internal standards. FAME contents were subsequently corrected for the derivative methyl carbon to determine FA contents. FAs and alkanes were normalized to OC content.
Project(s):
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0874D: Ozeane unter Stress: APOC - Anthropogene Einflüsse auf den Kreislauf partikulären organischen Kohlenstoffs in der Nordsee
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Coverage:
Median Latitude: 54.068525 * Median Longitude: 8.152558 * South-bound Latitude: 53.898300 * West-bound Longitude: 7.919804 * North-bound Latitude: 54.230000 * East-bound Longitude: 8.707200
Date/Time Start: 2022-03-17T13:11:45 * Date/Time End: 2022-03-30T16:07:52
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 0.01 m
Event(s):
HE595_1-3 * Latitude: 54.134669 * Longitude: 8.019095 * Date/Time: 2022-03-17T13:11:45 * Elevation: -26.0 m * Location: North Sea * Campaign: HE595 (CYPOC) * Basis: Heincke * Method/Device: MultiCorer (MUC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Wei, Bingbing | Station number | ||
| 2 | LATITUDE | Latitude | Wei, Bingbing | Geocode | ||
| 3 | LONGITUDE | Longitude | Wei, Bingbing | Geocode | ||
| 4 | DEPTH, sediment/rock | Depth sed | m | Wei, Bingbing | Geocode | |
| 5 | Depth, top/min | Depth top | m | Wei, Bingbing | ||
| 6 | Depth, bottom/max | Depth bot | m | Wei, Bingbing | ||
| 7 | Tetradecanoic acid, per unit mass total organic carbon | 14:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 8 | 13-methyl-Tetradecanoic acid, per unit mass total organic carbon | i-15:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 9 | 12-methyl-Tetradecanoic acid, per unit mass total organic carbon | ai-15:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 10 | Pentadecanoic acid, per unit mass total organic carbon | 15:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 11 | Hexadecanoic acid, per unit mass total organic carbon | 16:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 12 | 15-methyl-Hexadecanoic acid, per unit mass total organic carbon | i-17:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 13 | 14-methyl-Hexadecanoic acid, per unit mass total organic carbon | ai-17:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 14 | Heptadecanoic acid, per unit mass total organic carbon | 17:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 15 | Octadecanoic acid, per unit mass total organic carbon | 18:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 16 | Octadecanoic acid, per unit mass total organic carbon | 18:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 17 | Icosanoic acid, per unit mass total organic carbon | 20:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 18 | Heneicosanoic acid, per unit mass total organic carbon | 21:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 19 | Docosanoic acid, per unit mass total organic carbon | 22:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 20 | Tricosanoic acid, per unit mass total organic carbon | 23:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 21 | Tetracosanoic acid, per unit mass total organic carbon | 24:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 22 | Pentacosanoic acid, per unit mass total organic carbon | 25:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 23 | Hexacosanoic acid, per unit mass total organic carbon | 26:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 24 | Heptacosanoic acid, per unit mass total organic carbon | 27:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 25 | Octacosanoic acid, per unit mass total organic carbon | 28:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 26 | Nonacosanoic acid, per unit mass total organic carbon | 29:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 27 | Triacontanoic acid, per unit mass total organic carbon | 30:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 28 | Hentriacontanoic acid, per unit mass total organic carbon | 31:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 29 | Dotriacontanoic acid, per unit mass total organic carbon | 32:0/TOC | µg/g | Wei, Bingbing | Gas chromatograph, Agilent, 7890A; with flame ionization detection (FID) | |
| 30 | Fatty acids, per unit mass total organic carbon | FA/TOC | µg/g | Wei, Bingbing | total | |
| 31 | Fatty acids, per unit mass total organic carbon | FA/TOC | µg/g | Wei, Bingbing | C16+18FAs | |
| 32 | Fatty acids, per unit mass total organic carbon | FA/TOC | µg/g | Wei, Bingbing | C26+28+30+32FAs | |
| 33 | Carbon Preference Index, fatty acids | CPI FA | Wei, Bingbing | C26-32FAs | ||
| 34 | Fatty acids, per unit mass total organic carbon | FA/TOC | µg/g | Wei, Bingbing | C15i+ai+17i+ai FAs | |
| 35 | Fatty acids, per unit mass marine organic carbon | FA/OC mar | mg/g | Wei, Bingbing | C16+18 FAs | |
| 36 | Fatty acids, per unit mass terrestrial organic carbon | FA/OC terr | mg/g | Wei, Bingbing | C26+28+30+32 FAs | |
| 37 | Fatty acids, loading | FA loading | µg/m2 | Wei, Bingbing | C16+18 FAs | |
| 38 | Fatty acids, loading | FA loading | µg/m2 | Wei, Bingbing | C26+28+30+32 FAs |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1057 data points