Hahn, Annette; Schefuß, Enno; Groeneveld, Jeroen; Miller, Charlotte; Zabel, Matthias (2020): Organic geochemical measurements of sediment core GeoB20616-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.910474, In: Hahn, A et al. (2020): Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.910537
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Abstract:
Climate sensitive organic proxies, like the distribution and isotopic composition of plant-wax lipids provide information on climatic changes in the catchment areas of the Incomati, Matola, and Lusutfu rivers. At the transition between glacials and interglacials, shifts in vegetation correlate with changes in sea surface temperature in the Agulhas current. The local hydrology, however, does not follow these orbital-paced shifts. Instead, precipitation patterns follow millennial scale variations with different forcing mechanisms in glacial versus interglacial climatic states.
Related to:
Hahn, Annette; Schefuß, Enno; Groeneveld, Jeroen; Miller, Charlotte; Zabel, Matthias (2021): Glacial to interglacial climate variability in the southeastern African subtropics (25–20° S). Climate of the Past, 17(1), 345-360, https://doi.org/10.5194/cp-17-345-2021
Project(s):
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0798A: Tracing Human and Climate impacts in South Africa
Federal Ministry of Education and Research (BMBF), grant/award no. 03G0840A: Regional Archives for Integrated iNvestigations
Coverage:
Latitude: -25.589000 * Longitude: 33.334000
Date/Time Start: 2016-02-15T13:00:00 * Date/Time End: 2016-02-15T13:00:00
Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 9.32 m
Event(s):
M123_175-1 (GeoB20616-1) * Latitude: -25.589000 * Longitude: 33.334000 * Date/Time: 2016-02-15T13:00:00 * Elevation: -460.0 m * Recovery: 957 cm * Campaign: M123 * Basis: Meteor (1986) * Method/Device: Gravity corer (GC)
Comment:
GeoB20616-1 organic geochemical down-core data. n-Alkane isotopic composition and distribution descriptive parameters averaged. The elevated CPI values ranging from 3.8 to 14 indicate that the nalkanes within the terrestrial and marine samples were likely derived from nondegraded, terrestrial, higher plant material (Eglinton & Hamilton, 1967). We focus the discussion on the isotopic signals of the n-C31 alkane but note that the n-C29 and n-C33 alkanes reveal similar trends.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Hahn, Annette | Geocode | |
| 2 | n-Alkane C29, δ13C | C29 δ13C | ‰ PDB | Hahn, Annette | vs. VPDB | |
| 3 | n-Alkane C31, δ13C | C31 δ13C | ‰ PDB | Hahn, Annette | vs. VPDB | |
| 4 | n-Alkane C33, δ13C | C33 δ13C | ‰ PDB | Hahn, Annette | vs. VPDB | |
| 5 | n-Alkane C29, δD | C29 δD | ‰ SMOW | Hahn, Annette | vs. VSMOW | |
| 6 | n-Alkane C31, δD | C31 δD | ‰ SMOW | Hahn, Annette | vs. VSMOW | |
| 7 | n-Alkane C33, δD | C33 δD | ‰ SMOW | Hahn, Annette | vs. VSMOW | |
| 8 | Carbon Preference Index, n-Alkanes (C25-C33) | CPI 25-33 | Hahn, Annette |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
642 data points
Data
| 1 Depth sed [m] | 2 C29 δ13C [‰ PDB] | 3 C31 δ13C [‰ PDB] | 4 C33 δ13C [‰ PDB] | 5 C29 δD [‰ SMOW] | 6 C31 δD [‰ SMOW] | 7 C33 δD [‰ SMOW] | 8 CPI 25-33 |
|---|---|---|---|---|---|---|---|
| 0.02 | -26.0 | -25.2 | -23.3 | -133 | -147 | -150 | 6 |
| 0.12 | -25.6 | -24.8 | -23.2 | -140 | -147 | -150 | 6 |
| 0.22 | -26.2 | -25.1 | -23.3 | -138 | -145 | -148 | 7 |
| 0.32 | -26.1 | -25.0 | -23.2 | -144 | -147 | -151 | 7 |
| 0.42 | -26.0 | -24.8 | -23.0 | -130 | -146 | -148 | 7 |
| 0.52 | -25.7 | -25.3 | -23.2 | 7 | |||
| 0.62 | -140 | -147 | -148 | 7 | |||
| 0.72 | -25.9 | -24.9 | -23.0 | -137 | -150 | -150 | 8 |
| 0.82 | -25.2 | -24.3 | -22.5 | -134 | -145 | -149 | 7 |
| 0.92 | -24.9 | -24.5 | -22.4 | -136 | -150 | -151 | 8 |
| 1.02 | -25.1 | -24.4 | -22.5 | -141 | -150 | -151 | 7 |
| 1.12 | -25.2 | -24.5 | -22.6 | -136 | -150 | -150 | 7 |
| 1.22 | -25.2 | -24.4 | -22.5 | -145 | -151 | -151 | 8 |
| 1.32 | -25.4 | -24.5 | -22.7 | -135 | -150 | -149 | 7 |
| 1.42 | -25.5 | -24.9 | -22.8 | -141 | -147 | -147 | 7 |
| 1.52 | -24.8 | -24.1 | -22.2 | -139 | -148 | -145 | 7 |
| 1.62 | -25.0 | -24.7 | -22.6 | -143 | -149 | -149 | 8 |
| 1.72 | -25.2 | -24.6 | -22.6 | -135 | -148 | -149 | 7 |
| 1.82 | -24.9 | -24.2 | -22.3 | -138 | -149 | -151 | 7 |
| 1.92 | -25.0 | -24.3 | -22.4 | -139 | -147 | -147 | 7 |
| 2.02 | -25.1 | -24.4 | -22.5 | -138 | -148 | -148 | 7 |
| 2.12 | -25.0 | -24.2 | -22.4 | -130 | -147 | -148 | 7 |
| 2.22 | -24.7 | -24.1 | -22.2 | -137 | -150 | -150 | 11 |
| 2.32 | -25.0 | -24.2 | -22.4 | -135 | -151 | -149 | 8 |
| 2.42 | -25.5 | -24.4 | -22.5 | -135 | -151 | -150 | 7 |
| 2.52 | -24.7 | -24.2 | -22.3 | -132 | -149 | -148 | 7 |
| 2.62 | -25.3 | -24.3 | -22.5 | -132 | -148 | -148 | 7 |
| 2.72 | -25.4 | -24.3 | -22.4 | -131 | -147 | -148 | 7 |
| 2.82 | -25.0 | -24.0 | -22.3 | -135 | -145 | -149 | 7 |
| 2.92 | -138 | -146 | -148 | 8 | |||
| 3.12 | -25.2 | -24.3 | -22.4 | -138 | -144 | -148 | 7 |
| 3.22 | -25.4 | -24.3 | -22.6 | -130 | -145 | -147 | 7 |
| 3.32 | -25.4 | -24.6 | -22.6 | -132 | -145 | -147 | 7 |
| 3.42 | -25.3 | -24.3 | -22.5 | -142 | -149 | -151 | 7 |
| 3.52 | -25.5 | -24.5 | -22.6 | -127 | -144 | -147 | 7 |
| 3.62 | -25.9 | -25.2 | -23.2 | -141 | -145 | -150 | 8 |
| 3.72 | -25.1 | -24.0 | -22.1 | -133 | -148 | -152 | 8 |
| 3.82 | -25.1 | -24.2 | -22.3 | -132 | -148 | -149 | 7 |
| 3.92 | -25.0 | -24.3 | -22.6 | -143 | -151 | -153 | 7 |
| 4.02 | -24.9 | -23.9 | -22.2 | -137 | -152 | -152 | 8 |
| 4.12 | -24.8 | -23.9 | -22.1 | -143 | -153 | -155 | 7 |
| 4.22 | -24.8 | -23.9 | -22.0 | -144 | -153 | -153 | 8 |
| 4.32 | -24.9 | -23.9 | -22.1 | -142 | -152 | -154 | 8 |
| 4.42 | -25.0 | -24.0 | -22.2 | -136 | -151 | -152 | 7 |
| 4.52 | -25.3 | -24.1 | -22.4 | -138 | -154 | -154 | 7 |
| 4.62 | -24.9 | -23.9 | -22.2 | -137 | -153 | -154 | 7 |
| 4.72 | -25.0 | -23.9 | -22.0 | -143 | -150 | -152 | 7 |
| 4.82 | -24.7 | -23.8 | -22.0 | -145 | -150 | -152 | 6 |
| 4.92 | -25.0 | -24.0 | -22.1 | -138 | -153 | -154 | 7 |
| 5.02 | -24.7 | -24.0 | -22.1 | -142 | -153 | -153 | 7 |
| 5.12 | -25.0 | -24.1 | -22.1 | -145 | -152 | -153 | 7 |
| 5.22 | -24.9 | -24.3 | -22.2 | -143 | -154 | -155 | 7 |
| 5.32 | -24.9 | -23.9 | -22.0 | -142 | -152 | -154 | 7 |
| 5.42 | -24.9 | -23.9 | -22.1 | -141 | -152 | -155 | 6 |
| 5.52 | -24.1 | -24.3 | -22.7 | -139 | -151 | -154 | 7 |
| 5.62 | -24.7 | -23.6 | -22.0 | -141 | -154 | -155 | 9 |
| 5.72 | -24.4 | -23.6 | -21.9 | -137 | -151 | -153 | 7 |
| 5.82 | -24.6 | -23.6 | -22.1 | -147 | -153 | -154 | 7 |
| 5.92 | -24.3 | -23.6 | -22.0 | -147 | -153 | -155 | 7 |
| 6.02 | -24.8 | -23.7 | -21.9 | -138 | -153 | -155 | 6 |
| 6.12 | -24.7 | -23.6 | -22.1 | -147 | -156 | -156 | 7 |
| 6.22 | -25.1 | -24.1 | -22.3 | -145 | -151 | -152 | 7 |
| 6.32 | -25.1 | -24.0 | -22.3 | -138 | -150 | -152 | 7 |
| 6.42 | -25.0 | -23.9 | -22.1 | -134 | -147 | -148 | 6 |
| 6.52 | -25.1 | -24.1 | -22.4 | -139 | -149 | -148 | 7 |
| 6.62 | -25.1 | -24.1 | -22.4 | -136 | -148 | -149 | 7 |
| 6.72 | -25.4 | -24.5 | -22.8 | -132 | -149 | -148 | 7 |
| 6.82 | -25.4 | -23.9 | -22.5 | -146 | -153 | -153 | 8 |
| 6.92 | -24.8 | -24.0 | -22.4 | -134 | -151 | -152 | 7 |
| 7.02 | -25.0 | -24.1 | -22.6 | -134 | -150 | -151 | 7 |
| 7.12 | -24.8 | -24.1 | -22.5 | -134 | -151 | -153 | 7 |
| 7.22 | -25.1 | -24.0 | -22.6 | -144 | -151 | -152 | 7 |
| 7.32 | -25.3 | -24.2 | -22.8 | -138 | -154 | -156 | 7 |
| 7.42 | -25.6 | -24.1 | -22.7 | -138 | -153 | -155 | 7 |
| 7.52 | -25.4 | -24.2 | -22.6 | -138 | -153 | -156 | 7 |
| 7.62 | -25.4 | -24.1 | -22.6 | -140 | -152 | -153 | 7 |
| 7.72 | -25.4 | -24.1 | -22.6 | -145 | -151 | -153 | 7 |
| 7.82 | -26.3 | -24.5 | -23.0 | -137 | -147 | -150 | 6 |
| 7.93 | -25.8 | -24.4 | -22.7 | -142 | -151 | -154 | 8 |
| 8.02 | -25.2 | -24.2 | -22.3 | -153 | -157 | -159 | 7 |
| 8.12 | -25.3 | -24.0 | -22.3 | -137 | -157 | -159 | 6 |
| 8.22 | -25.3 | -23.9 | -22.3 | -149 | -156 | -159 | 6 |
| 8.32 | -24.0 | -23.8 | -22.2 | -137 | -154 | -155 | 5 |
| 8.42 | -25.5 | -24.2 | -22.6 | -144 | -151 | -153 | 6 |
| 8.52 | -25.6 | -24.5 | -22.8 | -141 | -147 | -152 | 7 |
| 8.62 | -26.2 | -24.9 | -23.1 | -142 | -146 | -151 | 1 |
| 8.72 | -25.9 | -24.5 | -22.8 | -146 | -156 | -157 | 6 |
| 8.82 | -26.2 | -24.6 | -22.9 | -147 | -157 | -157 | 6 |
| 8.92 | -25.8 | -24.4 | -22.7 | -151 | -158 | -161 | 7 |
| 9.02 | -26.1 | -24.5 | -22.9 | -150 | -159 | -160 | 6 |
| 9.12 | -26.4 | -25.0 | -22.9 | -139 | -154 | -157 | 7 |
| 9.22 | -26.6 | -25.2 | -23.1 | -141 | -155 | -158 | 7 |
| 9.32 | -26.3 | -25.7 | -23.6 | -134 | -144 | -146 | 7 |