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An Oceanic Cold Reversal During the Last Deglaciation
Barbara Stenni,1*Valerie Masson-Delmotte,2Sigfus Johnsen,3Jean Jouzel,2Antonio Longinelli,4Eric Monnin,5Regine Röthlisberger,5Enrico Selmo4
A detailed deuterium excess profile measured along the Dome C EPICA
(European Project for Ice Coring in Antarctica) core revealsthe timing
and strength of the sea surface temperature changesat the source
regions for Dome C precipitation. We infer thatan Oceanic Cold
Reversal took place in the southern Indian Ocean,800 years after the
Antarctic Cold Reversal. The temperature gradientbetween the oceanic
moisture source and Antarctica is similarto the Dome C sodium profile
during the deglaciation, illustratingthe strong link between this
gradient and the strength of theatmospheric circulation.
1 Department of Geological, Environmental and
Marine Sciences, University of Trieste, Trieste, Italy.
2 Laboratoire des Sciences du Climat et de
l'Environnement (Commissariat à l'Energie Atomique /CNRS
1572)/Institut Pierre-Simon Laplace, L'Orme des Merisiers,
Bâtiment 709, CEA Saclay, 91191 Gif-sur-Yvette Cédex,
France.
3 Niels Bohr Institute, Department of
Geophysics, University of Copenhagen, Copenhagen, Denmark.
4 Department of Earth Sciences, University of
Parma, Parma, Italy.
5 Climate and Environmental
Physics, Physics Institute, University of Bern, Bern, Switzerland.
*
To whom correspondence should be addressed. E-mail:
stenni{at}univ.trieste.it
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In Science Magazine
PERSPECTIVES
Eric J. Steig (14 September 2001) Science293 (5537), 2015.
[DOI: 10.1126/science.1061941] |Summary »|Full Text »|PDF »
REPORTS
Julian P. Sachs, Robert F. Anderson, and Scott J. Lehman (14 September 2001) Science293 (5537), 2077.
[DOI: 10.1126/science.1063584] |Abstract »|Full Text »|PDF »
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