Citation:

cp-14-73-2018

Name: Pliocene stable carbon and hydrogen isotopes of plant wax of ODP Site 108-659
Published: 2017-05-24
License: https://creativecommons.org/licenses/by/3.0/

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Published: 2017-05-24 • DOI registered: 2018-01-15

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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):

Ocean Drilling Program (ODP)

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: * 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):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Küchler, Rony R
2	AGE	Age	ka BP	Küchler, Rony R	after Clemens (1999)	Geocode
3	n-Alkanes C27-C35, per unit sediment mass	C27-C35/sed	µg/g	Küchler, Rony R
4	Carbon Preference Index, n-Alkanes	CPI n-Alkanes		Küchler, Rony R		[C27-C35]
5	n-Alkane C29, δD	C29 δD	‰ SMOW	Küchler, Rony R		vs. VSMOW
6	n-Alkane C29, δD, standard deviation	C29 δD std dev	±	Küchler, Rony R
7	n-Alkane C31, δD	C31 δD	‰ SMOW	Küchler, Rony R		vs. VSMOW
8	n-Alkane C31, δD, standard deviation	C31 δD std dev	±	Küchler, Rony R
9	n-Alkane C33, δD	C33 δD	‰ SMOW	Küchler, Rony R		vs. VSMOW
10	n-Alkane C33, δD, standard deviation	C33 δD std dev	±	Küchler, Rony R
11	n-Alkane C29, δ13C	C29 δ13C	‰ PDB	Küchler, Rony R
12	n-Alkane C29, δ13C, standard deviation	C29 δ13C std dev	±	Küchler, Rony R
13	n-Alkane C31, δ13C	C31 δ13C	‰ PDB	Küchler, Rony R
14	n-Alkane C31, δ13C, standard deviation	C31 δ13C std dev	±	Küchler, Rony R
15	n-Alkane C33, δ13C	C33 δ13C	‰ PDB	Küchler, Rony R
16	n-Alkane C33, δ13C, standard deviation	C33 δ13C std dev	±	Küchler, Rony R
17	n-Alkane C31, δD	C31 δD	‰ SMOW	Küchler, Rony R	Corrected	vs. VSMOW, corrected dD of the n-C31 alkane for changes in global ice volume

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

3292 data points

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