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Science 12 January 1996:
Vol. 271. no. 5246, p. 146
DOI: 10.1126/science.271.5246.146
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Research News

Richard A. Kerr

Climate records stored in sea-floor sediments and glacial ice show that Earth's climate oscillates from warmer to cooler and back every 2000 years or so. Researchers had detected this oscillation during the last ice age but suspected it might somehow be driven by the great ice sheets. Now they have learned that the cycle has continued since the ice age, up to the present day, implying that something else drives it--perhaps a slow variation of the sun.




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