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Küchler, Rony R; Dupont, Lydie M; Schefuß, Enno (2017): Pliocene stable carbon and hydrogen isotopes of plant wax of ODP Site 108-659. PANGAEA, https://doi.org/10.1594/PANGAEA.875694, Supplement to: Küchler, RR et al. (2018): Hybrid insolation forcing of Pliocene monsoon dynamics in West Africa. Climate of the Past, 14(1), 73-84, https://doi.org/10.5194/cp-14-73-2018

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Abstract:
The Pliocene is regarded as a potential analogue for future climate with conditions generally warmer-than-today and higher-than-preindustrial atmospheric CO2 levels. Here we present the first orbitally resolved records of continental hydrology and vegetation changes from West Africa for two Pliocene time intervals (5.0-4.6 Ma, 3.6-3.0 Ma). Our results indicate that changes in local insolation alone are insufficient to explain the full degree of hydrologic variations. Generally two modes of interacting insolation forcings are observed: during eccentricity maxima, when precession was strong, the West African monsoon was driven by summer insolation; during eccentricity minima, when precession-driven variations in local insolation were minimal, obliquity-driven changes in the summer latitudinal insolation gradient became dominant. This hybrid monsoonal forcing concept explains orbitally-controlled tropical climate changes, incorporating the forcing mechanism of latitudinal gradients for the Pliocene, which probably increased in importance during subsequent Northern Hemisphere glaciations.
Project(s):
Coverage:
Latitude: 18.077200 * Longitude: -21.026200
Date/Time Start: 1986-03-09T00:00:00 * Date/Time End: 1986-03-12T00:00:00
Minimum Elevation: -3082.3 m * Maximum Elevation: -3082.3 m
Event(s):
108-659 * Latitude: 18.077200 * Longitude: -21.026200 * Date/Time Start: 1986-03-09T00:00:00 * Date/Time End: 1986-03-12T00:00:00 * Elevation: -3082.3 m * Penetration: 671.9 m * Recovery: 411.2 m * Location: North Atlantic Ocean * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 59 cores; 551.9 m cored; 0 m drilled; 74.5% recovery
Comment:
SD standard dD 2 per mil.SD standard d13C 0.3 per mil.Standard SD is given if SD is smaller than Standard SD.
Orbitally resolved records of continental hydrology (Deuterium) and vegetation changes (stable carbon isotopes) from West Africa (ODP Site 659) for two Pliocene time intervals (5.0-4.6 Ma, 3.6-3.0 Ma).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelKüchler, Rony R
2AGEAgeka BPKüchler, Rony Rafter Clemens (1999)Geocode
3n-Alkane C27-C35 per unit sediment massC27-C35µg/gKüchler, Rony R
4Carbon Preference Index, n-AlkanesCPI n-AlkanesKüchler, Rony R[C27-C35]
5n-Alkane C29, δDC29 δD‰ SMOWKüchler, Rony Rvs. VSMOW
6n-Alkane C29, δD, standard deviationC29 δD std dev±Küchler, Rony R
7n-Alkane C31, δDC31 δD‰ SMOWKüchler, Rony Rvs. VSMOW
8n-Alkane C31, δD, standard deviationC31 dD std dev±Küchler, Rony R
9n-Alkane C33, δDC33 δD‰ SMOWKüchler, Rony Rvs. VSMOW
10n-Alkane C33, δD, standard deviationC33 dD std dev±Küchler, Rony R
11n-Alkane C29, δ13CC29 δ13C‰ PDBKüchler, Rony R
12n-Alkane C29, δ13C, standard deviationC29 δ13C std dev±Küchler, Rony R
13n-Alkane C31, δ13CC31 δ13C‰ PDBKüchler, Rony R
14n-Alkane C31, δ13C, standard deviationC31 δ13C std dev±Küchler, Rony R
15n-Alkane C33, δ13CC33 δ13C‰ PDBKüchler, Rony R
16n-Alkane C33, δ13C, standard deviationC33 δ13C std dev±Küchler, Rony R
17n-Alkane C31, δDC31 δD‰ SMOWKüchler, Rony RCorrectedvs. VSMOW, corrected dD of the n-C31 alkane for changes in global ice volume
Size:
3292 data points

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