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Chiessi, Cristiano Mazur; Mulitza, Stefan; Pätzold, Jürgen; Wefer, Gerold; Marengo, José A (2009): Stable oxygen isotope data of Globigerinoides ruber white and titanium intensity from sediment core GeoB6211-2. PANGAEA, https://doi.org/10.1594/PANGAEA.729737, Supplement to: Chiessi, CM et al. (2009): Possible impact of the Atlantic Multidecadal Oscillation on the South American summer monsoon. Geophysical Research Letters, 36, L21707, https://doi.org/10.1029/2009GL039914

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Abstract:
The South American summer monsoon (SASM) is the main source of precipitation for the most densely populated and agriculturally productive regions of tropical and subtropical South America. Here we investigate the impact of the Atlantic Multidecadal Oscillation (AMO) on the SASM using ~4500 yr long proxy records of the discharge variability of the La Plata River Drainage Basin (PRDB), subtropical South America. We measured the stable oxygen composition of planktic foraminifera (related to the extension of the PRDB plume), and Ti intensity in bulk sediment (related to the source of the terrigenous sediments) from a marine sediment core. Spectral and wavelet analyses of our records indicate an oscillation with period of ~64 yr. We conclude that the observed oscillation reflects variability in the SASM activity associated to the AMO. Sea surface temperature and atmospheric circulation anomalies triggered by the AMO would control the variability in SASM activity.
Coverage:
Latitude: -32.505200 * Longitude: -50.242700
Date/Time Start: 1999-12-12T17:21:00 * Date/Time End: 1999-12-12T17:21:00
Minimum DEPTH, sediment/rock: 1.230 m * Maximum DEPTH, sediment/rock: 4.480 m
Event(s):
GeoB6211-2 * Latitude Start: -32.505200 * Longitude Start: -50.242700 * Latitude End: -32.505200 * Longitude End: -50.242700 * Date/Time: 1999-12-12T17:21:00 * Elevation Start: -657.0 m * Elevation End: -657.0 m * Recovery: 7.74 m * Location: Argentine Basin * Campaign: M46/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL)
Size:
956 data points

Data

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


Depth sed [m]

Age [ka BP]

G. ruber w δ18O [‰ PDB]

Ti [cps]
1.23014.050-0.13196.17
1.23514.056204.53
1.24014.0630.10195.03
1.24514.069195.73
1.25014.0750.39198.43
1.25514.082202.30
1.26014.0880.60201.13
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1.27514.107197.30
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