Temperature and salinity reconstruction for sediment core GeoB3313-1, supplement to: Lamy, Frank; Rühlemann, Carsten; Hebbeln, Dierk; Wefer, Gerold (2002): High- and low-latitude climate control on the position of the southern Peru-Chile Current during the Holocene. Paleoceanography, 17(2), 1028

• Main Authors: Lamy, Frank, Rühlemann, Carsten, Hebbeln, Dierk, Wefer, Gerold
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2002
• Subjects: GHOST; Gravity corer Kiel type; SO102/1; Sonne; Geosciences, University of Bremen GeoB; Antarctic; The Antarctic; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.735166; https://doi.pangaea.de/10.1594/PANGAEA.735166

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. : For chronostratigraphy and iron data see Lamy et al. (2001) datasets: doi:10.1594/PANGAEA.735164