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Century-scale events in monsoonal climate over the past 24,000 years
Naturevolume 364, pages322–324 (1993)Cite this article
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Abstract
BOTH the marine sediment record and numerical modelling of the atmospheric summer circulation over the northern Indian Ocean and southeast Asia have shown that the monsoonal climate exhibits a direct but nonlinear response to the intensity of solar insolation during summer, with a time lag of several thousand years1,2. Here we present evidence from a high-resolution record of oxygen isotopes and carbonate spanning the past 24,000 calendar years that the response of the southwest monsoon over the Arabian Sea to long-term, gradual insolation changes occurred in several distinct events of less than 300 years duration, at 14,300, 13,500, 13,060, 9,900, 8,800 and 7,30014C yrBP. Thus, during this transitional period from glacial to post-glacial conditions the slow solar forcing seems to have induced very rapid changes in local climate. We speculate that the rapid response may be related to albedo changes in Asia.
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F. Sirocko: To whom correspondence should be addressed at the Geologisch-Palaontologisches Institut
Authors and Affiliations
Geologisch-Paläontologischeslnstitut, UniversitätKiel, Olshausenstr. 40-60, 24098, Kiel, Germany
F. Sirocko, M. Sarnthein & H. Lange
Lamont-Doherty Earth Observatory at Columbia University, Palisades, New York, 10964, USA
F. Sirocko
Institut fürKernphysik, Universität Kiel, Germany
H. Erlenkeuser
Centre des Faibles Radioactivites, CNRS-CEA, 91198, Gif sur Yvette
M. Arnold & J. C. Duplessy
- F. Sirocko
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- J. C. Duplessy
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Sirocko, F., Sarnthein, M., Erlenkeuser, H.et al. Century-scale events in monsoonal climate over the past 24,000 years.Nature364, 322–324 (1993). https://doi.org/10.1038/364322a0
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