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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.
Keyword(s):
fatty acids; HAUSGARTEN Long Term Observatory; IP25; terrestrial sterols
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):
Long-term Investigation at AWI-Hausgarten off Svalbard (Hausgarten)
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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventFahl, Kirsten
2 DEPTH, waterDepth watermFahl, KirstenGeocode – trap depth
3 CupCupFahl, Kirsten
4 DATE/TIMEDate/TimeFahl, KirstenGeocode – start
5 DATE/TIMEDate/TimeFahl, KirstenGeocode – end
6 Duration, number of daysDurationdaysFahl, Kirsten
7 Fatty acid, fluxFatty acid fluxµg/m2/dayFahl, KirstenGas chromatography(C16:1)+(C20:5) flux
8 Fatty acid, fluxFatty acid fluxµg/m2/dayFahl, KirstenGas chromatography(C18:4)+(C22:6) flux
9 24-Methylcholest-5-en-3beta-ol, fluxCampesterol fluxµg/m2/dayFahl, KirstenGas chromatography - Mass spectrometry (GC-MS)
10 24-Ethylcholest-5-en-3beta-ol, fluxb-Sitosterol fluxµg/m2/dayFahl, KirstenGas chromatography - Mass spectrometry (GC-MS)
11 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, fluxIP25 fluxµg/m2/dayFahl, KirstenGas 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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Depth water [m]
(trap depth)		3 
Cup		4 
Date/Time
(start)		5 
Date/Time
(end)		6 
Duration [days]		7 
Fatty acid flux [µg/m2/day]
((C16:1)+(C20:5) flux, Gas chr...)		8 
Fatty acid flux [µg/m2/day]
((C18:4)+(C22:6) flux, Gas chr...)		9 
Campesterol flux [µg/m2/day]
(Gas chromatography - Mass spe...)		10 
b-Sitosterol flux [µg/m2/day]
(Gas chromatography - Mass spe...)		11 
IP25 flux [µg/m2/day]
(Gas chromatography - Mass spe...)
FEVI10 17912005-08-252005-09-0512256.7255.912.011.450.00
FEVI1017922005-09-052005-09-2520780.55114.393.522.840.11
FEVI1017932005-09-252005-10-1520159.608.673.521.623.25
FEVI1017942005-10-152005-10-311635.473.120.190.220.09
FEVI1017952005-10-312005-11-30308.480.970.080.110.05
FEVI1017962005-11-302005-12-313115.541.950.100.110.16
FEVI1017972005-12-312006-02-285927.362.480.140.140.19
FEVI1017982006-02-282006-03-3030126.305.440.760.810.84
FEVI1017992006-03-302006-04-141575.880.000.350.320.62
FEVI10179102006-04-142006-04-2915215.2236.231.130.830.32
FEVI10179112006-04-292006-05-1415750.20131.952.852.0511.03
FEVI10179122006-05-142006-05-2915173.4049.461.831.020.86
FEVI10179132006-05-292006-06-1315840.32316.564.852.330.34
FEVI10179142006-06-132006-06-28154565.892268.107.096.620.00
FEVI10179152006-06-282006-07-131515.041.710.150.110.04
FEVI10179162006-07-132006-07-207153.4114.470.680.700.28
FEVI10179172006-07-202006-07-2771355.67257.5813.6111.401.40
FEVI13 23012006-08-262006-09-01634.665.310.120.630.00
FEVI1323022006-09-012006-09-07647.5411.130.100.460.00
FEVI1323032006-09-072006-09-15891.7923.410.170.410.00
FEVI1323042006-09-152006-09-22794.6332.980.230.350.00
FEVI1323052006-09-222006-09-30869.1510.040.200.400.00
FEVI1323062006-09-302006-10-151595.2213.370.610.641.09
FEVI1323072006-10-152006-10-311640.437.480.100.371.84
FEVI1323082006-10-312006-11-151421.412.730.070.190.00
FEVI1323092006-11-152006-11-3016109.5647.230.370.650.00
FEVI13230102006-11-302006-12-313134.288.210.080.250.00
FEVI13230112006-12-312007-01-313116.985.180.130.340.22
FEVI13230122007-01-312007-02-282833.006.020.110.270.25
FEVI13230132007-02-282007-03-151551.147.000.120.414.96
FEVI13230142007-03-152007-03-31161865.391019.451.713.520.31
FEVI13230152007-03-312007-04-1515483.0563.550.982.056.28
FEVI13230162007-04-152007-04-30152031.921021.232.706.130.00
FEVI13230172007-04-302007-05-1010754.52378.410.480.310.44
FEVI13230182007-05-102007-05-2010122.6630.040.730.800.21
FEVI13230192007-05-202007-06-061658.1510.760.210.170.10
FEVI13230202007-06-062007-06-2014303.87167.010.721.030.32