Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
AAAS Store

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 15 August 2003:
Vol. 301. no. 5635, pp. 948 - 952
DOI: 10.1126/science.1084451
Prev | Table of Contents | Next

Reports

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

Katharina Pahnke,1* Rainer Zahn,1,2* Henry Elderfield,3 Michael Schulz4

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.

1 School of Earth, Ocean and Planetary Sciences, Cardiff University, Park Place, Cardiff CF10 3YE, UK.
2 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.
3 Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.
4 Department of Geosciences and DFG Research Center "Ocean Margins," University of Bremen, 28334 Bremen, Germany.

* To whom correspondence should be addressed. E-mail: pahnkek{at}cf.ac.uk (K.P); rainer{at}geo.ub.es (R.Z.)

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Southern Hemisphere Water Mass Conversion Linked with North Atlantic Climate Variability.
K. Pahnke and R. Zahn (2005)
Science 307, 1741-1746
   Abstract »    Full Text »    PDF »
Deep-sea benthic foraminiferal record of the mid-Pleistocene transition in the SW Pacific.
B. W. Hayward, H. R. Grenfell, A. T. Sabaa, and E. Sikes (2005)
Geological Society, London, Special Publications 247, 85-115
   Abstract »    PDF »
Assessing the Causes of Late Pleistocene Extinctions on the Continents.
A. D. Barnosky, P. L. Koch, R. S. Feranec, S. L. Wing, and A. B. Shabel (2004)
Science 306, 70-75
   Abstract »    Full Text »    PDF »
Middle Miocene Southern Ocean Cooling and Antarctic Cryosphere Expansion.
A. E. Shevenell, J. P. Kennett, and D. W. Lea (2004)
Science 305, 1766-1770
   Abstract »    Full Text »    PDF »
Antarctic Timing of Surface Water Changes off Chile and Patagonian Ice Sheet Response.
F. Lamy, J. Kaiser, U. Ninnemann, D. Hebbeln, H. W. Arz, and J. Stoner (2004)
Science 304, 1959-1962
   Abstract »    Full Text »    PDF »
New Zealand Maritime Glaciation: Millennial-Scale Southern Climate Change Since 3.9 Ma.
R. M. Carter and P. Gammon (2004)
Science 304, 1659-1662
   Abstract »    Full Text »    PDF »


ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products