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Vol. 97, Issue 4, 1390-1394, February 15, 2000

Research Articles / Geology
 Two terrestrial records of rapid climatic change during the glacial-Holocene transition (14,000- 9,000 calendar years B.P.) from Europe

Hilary H. Birks*,dagger and Brigitta AmmannDagger

* Botanical Institute, University of Bergen, Allégaten 41, N-5007 Bergen, Norway; and Dagger  Geobotanical Institute, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland

Edited by H. E. Wright, Jr., University of Minnesota, Minneapolis, MN, and approved December 17, 1999 (received for review September 2, 1999)

Two independent multidisciplinary studies of climatic change during the glacial-Holocene transition (ca. 14,000-9,000 calendar yr B.P.) from Norway and Switzerland have assessed organism responses to the rapid climatic changes and made quantitative temperature reconstructions with modern calibration data sets (transfer functions). Chronology at Kråkenes, western Norway, was derived from calibration of a high-resolution series of 14C dates. Chronologies at Gerzensee and Leysin, Switzerland, were derived by comparison of delta 18O in lake carbonates with the delta 18O record from the Greenland Ice Core Project. Both studies demonstrate the sensitivity of terrestrial and aquatic organisms to rapid temperature changes and their value for quantitative reconstruction of the magnitudes and rates of the climatic changes. The rates in these two terrestrial records are comparable to those in Greenland ice cores, but the actual temperatures inferred apply to the terrestrial environments of the two regions.

dagger To whom reprint requests should be addressed. E-mail: hilary.birks{at}bot.uib.no.


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