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.

Published Online December 2, 2004
Science DOI: 10.1126/science.1102490

Reports

Submitted on July 7, 2004
Accepted on November 15, 2004

Asynchronous Terrestrial and Marine Signals of Climate Change During Heinrich Events

Tim C. Jennerjahn 1*, Venugopalan Ittekkot 1, Helge W. Arz 2, Hermann Behling 3, Jürgen Pätzold 3, Gerold Wefer 3

1 Zentrum für Marine Tropenökologie, Fahrenheitstrasse 6, D-28359 Bremen, Germany.
2 GeoForschungsZentrum Potsdam, Telegrafenberg, 14473 Potsdam, Germany.
3 DFG Forschungszentrum Ozeanränder (RCOM), Klagenfurter Strasse, 28359 Bremen, Germany.

* To whom correspondence should be addressed.
Tim C. Jennerjahn , E-mail: tim.jennerjahn{at}zmt-bremen.de

Tropical regions have been reported to play a key role in climate dynamics. To date, however, there are uncertainties in the timing and amplitude of the response of tropical ecosystems to millennial-scale climate change. We present evidence of an asynchrony between terrestrial and marine signals of climate change during Heinrich events preserved in marine sediment cores from the Brazilian continental margin. The inferred time lag of about 1,000 - 2,000 years is much larger than the ecological response to recent climate change and appears to be related to the nature of hydrological changes.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Late Holocene coastal hydrographic and climate changes in the eastern North Sea.
D. Hebbeln, K.-L. Knudsen, R. Gyllencreutz, P. Kristensen, D. Klitgaard-Kristensen, J. Backman, C. Scheurle, H. Jiang, I. Gil, M. Smelror, et al. (2006)
The Holocene 16, 987-1001
   Abstract »    PDF »
Early reactivation of European rivers during the last deglaciation..
G. Menot, E. Bard, F. Rostek, J. W. H. Weijers, E. C. Hopmans, S. Schouten, and J. S. S. Damste (2006)
Science 313, 1623-1625
   Abstract »    Full Text »    PDF »
Holocene African droughts relate to eastern equatorial Atlantic cooling.
S. Weldeab, R. R. Schneider, M. Kolling, and G. Wefer (2005)
Geology 33, 981-984
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)