Temperature and salinity reconstruction for sediment core GeoB3313-1

We reconstructed changes of temperature, salinity, and productivity within the southern Peru-Chile Current during the last 8000 years from a high-resolution sediment core recovered at 41°S using alkenones, isotope ratios of planktic foraminifera, biogenic opal, and organic carbon. Paleotemperatures...

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Bibliographic Details
Main Authors: Lamy, Frank, Rühlemann, Carsten, Hebbeln, Dierk, Wefer, Gerold
Format: Dataset
Language:English
Published: PANGAEA 2002
Subjects:
CHIPAL
GeoB
GeoB3313-1
Geosciences
University of Bremen
GHOST
Gravity corer (Kiel type)
SL
SO102/1
Sonne
South-East Pacific
Antarctic
The Antarctic
Pacific
Antarc*
Antarctica
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.735166
https://doi.org/10.1594/PANGAEA.735166
Description
Summary:We reconstructed changes of temperature, salinity, and productivity within the southern Peru-Chile Current during the last 8000 years from a high-resolution sediment core recovered at 41°S using alkenones, isotope ratios of planktic foraminifera, biogenic opal, and organic carbon. Paleotemperatures and paleosalinities reached maximum values at ~5500 years ago and thereafter declined to modern values, whereas paleoproductivity continuously increased throughout the last 8000 years. We ascribe these long-term Holocene trends primarily to latitudinal shifts of the Antarctic Circumpolar Current (ACC). The concurrence with shifts in the position of the Southern Westerlies points to a common response of atmospheric and oceanographic circulation patterns off southern Chile. Millennial- to centennial-scale fluctuations of paleotemperatures and paleosalinities, on the other hand, lag displacements in the position of the Southern Westerlies but reveal a significant correlation to short-term temperature changes in Antarctica, indicating a high-latitude control of the ACC at these timescales.

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