Schefuß, Enno; Ratmeyer, Volker; Stuut, Jan-Berend W; Jansen, J H Fred; Sinninghe Damsté, Jaap S (2003): Stable carbon isotopic analyses of n-alkanes and the calculated C4 plant-derived fractions in the dust samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.141041, Supplement to: Schefuß, E et al. (2003): Carbon isotope analyses of n-alkanes in dust from the lower atmosphere over the central eastern Atlantic. Geochimica et Cosmochimica Acta, 67(10), 1757-1767, https://doi.org/10.1016/S0016-7037(02)01414-X
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Abstract:
Atmospheric dust samples collected along a transect off the West African coast have been investigated for their lipid content and compound-specific stable carbon isotope compositions. The saturated hydrocarbon fractions of the organic solvent extracts consist mainly of long-chain n-alkanes derived from epicuticular wax coatings of terrestrial plants. Backward trajectories for each sampling day and location were calculated using a global atmospheric circulation model. The main atmospheric transport took place in the low-level trade-wind layer, except in the southern region, where long-range transport in the mid-troposphere occurred. Changes in the chain length distributions of the n-alkane homologous series are probably related to aridity, rather than temperature or vegetation type. The carbon preference of the leaf-wax n-alkanes shows significant variation, attributed to a variable contribution of fossil fuel- or marine-derived lipids. The effect of this nonwax contribution on the d13C values of the two dominant n-alkanes in the aerosols, n-C29 and n-C31 alkane, is, however, insignificant. Their d13C values were translated into a percentage of C4 vs. C3 plant type contribution, using a two-component mixing equation with isotopic end-member values from the literature. The data indicate that only regions with a predominant C4 type vegetation, i.e. the Sahara, the Sahel, and Gabon, supply C4 plant-derived lipids to dust organic matter. The stable carbon isotopic compositions of leaf-wax lipids in aerosols mainly reflect the modern vegetation type along their transport pathway. Wind abrasion of wax particles from leaf surfaces, enhanced by a sandblasting effect, is most probably the dominant process of terrigenous lipid contribution to aerosols.
Project(s):
Coverage:
Median Latitude: 6.046250 * Median Longitude: -4.054167 * South-bound Latitude: -10.690000 * West-bound Longitude: -17.930000 * North-bound Latitude: 30.440000 * East-bound Longitude: 12.500000
Date/Time Start: 1998-02-15T00:00:00 * Date/Time End: 1998-03-11T00:00:00
Minimum ALTITUDE: 15 m * Maximum ALTITUDE: 15 m
Event(s):
M41/1_D1 (D1) * Latitude: 30.440000 * Longitude: -11.720000 * Date/Time: 1998-02-15T00:00:00 * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: Aeolian dust sample (AEOLD) * Comment: Sampling was conducted with Andersen high-volume particulate matter dust samplers installed on the ship`s tower.
M41/1_D3 (D3) * Latitude: 22.890000 * Longitude: -17.440000 * Date/Time: 1998-02-17T00:00:00 * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: Aeolian dust sample (AEOLD) * Comment: Sampling was conducted with Andersen high-volume particulate matter dust samplers installed on the ship`s tower.
M41/1_D4 (D4) * Latitude: 19.740000 * Longitude: -17.910000 * Date/Time: 1998-02-17T00:00:00 * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: Aeolian dust sample (AEOLD) * Comment: Sampling was conducted with Andersen high-volume particulate matter dust samplers installed on the ship`s tower.
Comment:
Altitude=15m: Sampling was conducted with Andersen high-volume particulate matter dust samplers installed on the ship's tower.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
350 data points
Data
1 Latitude | 2 Longitude | 3 Event | 4 Altitude [m] | 5 n-Alkane range | 6 Cmax | 7 ACL n-Alkane | 8 Norm31 | 9 CPI 25-33 | 10 C24 δ13C [‰ PDB] | 11 C25 δ13C [‰ PDB] | 12 C26 δ13C [‰ PDB] | 13 C27 δ13C [‰ PDB] | 14 C28 δ13C [‰ PDB] | 15 C29 δ13C [‰ PDB] | 16 C30 δ13C [‰ PDB] | 17 C31 δ13C [‰ PDB] | 18 C32 δ13C [‰ PDB] | 19 C33 δ13C [‰ PDB] | 20 n-Alkane wm δ13C [‰ PDB] | 21 C4 plant n-Alkane [%] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
30.4400 | -11.7200 | M41/1_D1 | 15 | 24-35 | 29 | 27.6 | 0.48 | 2.40 | -28.8 | -30.1 | -28.9 | -29.6 | 44 | |||||||
22.8900 | -17.4400 | M41/1_D3 | 15 | 24-35 | 31 | 27.6 | 0.57 | 2.45 | -27.5 | -28.1 | -28.1 | -27.3 | -32.4 | -27.7 | 58 | |||||
19.7400 | -17.9100 | M41/1_D4 | 15 | 24-35 | 31 | 26.9 | 0.60 | 2.24 | -28.3 | -27.2 | -27.4 | -26.9 | -27.7 | -28.7 | -28.6 | -27.7 | -28.9 | -29.3 | -28.1 | 55 |
16.0000 | -17.9300 | M41/1_D5 | 15 | 24-35 | 31 | 29.2 | 0.62 | 3.43 | -27.9 | -26.9 | -27.6 | -28.9 | -30.1 | -28.9 | -28.5 | -30.7 | -27.4 | -29.1 | 47 | |
15.2900 | -17.9200 | M41/1_D6 | 15 | 24-35 | 31 | 29.3 | 0.61 | 4.23 | -26.8 | -32.6 | -27.3 | -27.4 | -28.0 | -29.3 | -27.4 | -27.8 | -29.9 | -26.0 | -28.4 | 52 |
14.7000 | -17.9200 | M41/1_D7 | 15 | 24-35 | 31 | 28.8 | 0.60 | 3.83 | -27.1 | -28.1 | -29.2 | -27.9 | -28.4 | 53 | ||||||
13.9300 | -17.9200 | M41/1_D8 | 15 | 24-33 | 31 | 29.1 | 0.55 | 4.39 | -25.2 | -27.4 | -27.1 | -29.1 | -27.9 | -27.1 | -28.0 | 55 | ||||
10.4400 | -17.1900 | M41/1_D9 | 15 | 24-35 | 29 | 28.7 | 0.44 | 3.16 | -29.3 | -26.7 | -27.7 | -29.1 | -29.3 | -28.1 | -26.6 | -28.7 | 50 | |||
7.2600 | -14.1900 | M41/1_D10 | 15 | 24-33 | 29 | 28.8 | 0.28 | 5.79 | -26.6 | -28.2 | -29.6 | -29.8 | -31.2 | -30.0 | -31.0 | -29.5 | -31.1 | 34 | ||
6.2900 | -13.0900 | M41/1_D11 | 15 | 24-35 | 29 | 29.2 | 0.31 | 7.65 | -30.4 | -30.6 | -31.2 | -30.2 | -30.8 | -28.9 | -31.0 | 34 | ||||
3.7100 | -10.2300 | M41/1_D12 | 15 | 24-33 | 29 | 28.8 | 0.33 | 5.09 | -28.6 | -28.7 | -28.1 | -27.6 | -28.8 | -30.4 | -29.0 | -30.2 | -29.5 | -28.8 | -30.3 | 39 |
1.3000 | -6.9400 | M41/1_D13 | 15 | 24-35 | 29 | 29.0 | 0.36 | 4.40 | -27.7 | -28.2 | -27.3 | -28.1 | -29.3 | -30.0 | -29.7 | -28.3 | -29.1 | -26.7 | -29.4 | 45 |
1.3200 | -2.8600 | M41/1_D14 | 15 | 24-31 | 29 | 27.0 | 0.12 | 3.71 | -26.8 | -30.3 | -28.6 | -29.5 | -30.1 | -31.5 | -28.9 | -30.2 | -31.3 | 32 | ||
1.5200 | -0.6000 | M41/1_D15 | 15 | 24-35 | 29 | 29.2 | 0.31 | 5.87 | -29.3 | -29.0 | -29.4 | -28.9 | -29.9 | -31.3 | -31.2 | -31.1 | -31.3 | -28.7 | -31.2 | 33 |
1.7600 | 1.6400 | M41/1_D16 | 15 | 24-35 | 29 | 29.2 | 0.33 | 5.48 | -28.8 | -28.4 | -29.0 | -30.3 | -31.5 | -31.3 | -31.7 | -31.1 | -30.0 | -31.5 | 31 | |
2.6100 | 6.5400 | M41/1_D17 | 15 | 24-35 | 29 | 28.8 | 0.30 | 4.68 | -27.3 | -28.6 | -27.4 | -28.4 | -29.3 | -30.4 | -29.7 | -30.4 | -29.1 | -30.4 | 38 | |
1.6800 | 7.9700 | M41/1_D18 | 15 | 24-33 | 29 | 28.4 | 0.24 | 6.09 | -28.1 | -28.8 | -29.0 | -29.5 | -31.4 | -29.0 | -31.6 | -29.5 | -31.5 | 31 | ||
1.7400 | 9.1400 | M41/1_D19 | 15 | 24-35 | 29 | 29.1 | 0.37 | 4.55 | -28.9 | -29.8 | -31.2 | -32.2 | -30.2 | -27.3 | -30.8 | 36 | ||||
1.6500 | 9.1100 | M41/1_D20 | 15 | 24-33 | 29 | 28.7 | 0.25 | 5.17 | -28.4 | -29.2 | -28.3 | -28.5 | -29.1 | -30.9 | -28.9 | -30.4 | -29.9 | -27.3 | -30.8 | 36 |
-1.3800 | 8.5400 | M41/1_D21 | 15 | 24-35 | 29 | 27.7 | 0.35 | 2.81 | -27.9 | -29.7 | -32.5 | -30.4 | -29.9 | -28.2 | -30.2 | 40 | ||||
-2.9100 | 9.2100 | M41/1_D22 | 15 | 24-31 | 29 | 26.0 | 0.15 | 3.23 | -28.6 | -27.6 | -30.0 | -28.9 | -29.7 | -30.2 | -30.2 | 40 | ||||
-6.1800 | 10.0500 | M41/1_D23 | 15 | 24-35 | 29 | 27.5 | 0.32 | 3.11 | -27.1 | -28.9 | -29.4 | -31.1 | -30.9 | -30.9 | -29.9 | -30.9 | 35 | |||
-8.0000 | 11.8600 | M41/1_D24 | 15 | 24-35 | 29 | 28.8 | 0.39 | 4.37 | -27.4 | -28.3 | -27.6 | -27.9 | -28.3 | -29.8 | -27.8 | -28.0 | -27.9 | -28.9 | -29.1 | 48 |
-10.6900 | 12.5000 | M41/1_D25 | 15 | 24-35 | 29 | 28.5 | 0.50 | 3.01 | -28.1 | -27.5 | -29.2 | -27.2 | -28.6 | -28.2 | 54 |