NOAA Paleoclimatology Program - Pahnke et al. 2003 Southern Ocean Mg/Ca and SST Reconstruction

*340,000-Year Centennial-Scale Marine Record of Southern Hemisphere Climatic Oscillation*

Figure 1. 340-ky-long d¹⁸O_plk and SST_Mg/Ca records from core MD97-2120 compared to the Vostok dD record.	340,000-Year Centennial-Scale Marine Record of Southern Hemisphere Climatic Oscillation Science Volume 301, Number 5635, pp. 948-952 (August 15 2003). Katharina Pahnke and Rainer Zahn ^* School of Earth, Ocean and Planetary Sciences, Cardiff University, Park Place, Cardiff CF10 3YE, UK ^* also at: Institució Catalana de Recerca i Estudis Avançats (ICREA) and Facultat de Geologia, Grup de Recerca Consolidat (GRC) en Geociències Marines, Department d' Estratigafia, Paleontologia i Geosciències Marines, Universitat de Barcelona, Campus de Pedralbes, 08028 Barcelona, Spain. Henry Elderfield Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK. Michael Schulz Department of Geosciences and DFG Research Center "Ocean Margins," University of Bremen, 28334 Bremen, Germany.
ABSTRACT:
In order to investigate rapid climatic changes at mid-southern latitudes, we have developed centennial-scale paleoceanographic records from the southwest Pacific that enable detailed comparison with Antarctic ice core records. These records suggest close coupling of mid-southern latitudes with Antarctic climate during deglacial and interglacial periods. Glacial sections display higher variability than is seen in Antarctic ice cores, which implies climatic decoupling between mid- and high southern latitudes due to enhanced circum-Antarctic circulation. Structural and temporal similarity with the Greenland ice core record is evident in glacial sections and suggests a degree of interhemispheric synchroneity not predicted from bipolar ice core correlations.

DATA:
Download the data from this study:
Foraminiferal d18O, Mg/Ca, and Sea Surface Temperature Reconstruction.

To read or view the full study, please visit the Science website.
It was published in Science Volume 301, Number 5635, pp. 948-952 (August 15 2003).

K.P. and R.Z. acknowledge financial support from the Leverhulme Trust, UK, under grant F/407/J. H.E. thanks the Natural Environment Research Council for financial support (grant GR3/1308).