A Mid-European Decadal Isotope-Climate Record from 15,500 to 5000 Years B.P.

Oxygen-isotope ratios of precipitation (δ 18 O P ) inferred from deep-lake ostracods from the Ammersee (southern Germany) provide a climate record with decadal resolution. The record in detail shows many of the rapid climate shifts seen in central Greenland ice cores between 15,000 and 5000 years be...

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Bibliographic Details
Published in:Science
Main Authors: Grafenstein, Ulrich von, Erlenkeuser, Helmut, Brauer, Achim, Jouzel, Jean, Johnsen, Sigfus J.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1999
Subjects:
Greenland
Greenland ice cores
North Atlantic
Online Access:http://dx.doi.org/10.1126/science.284.5420.1654
https://www.science.org/doi/pdf/10.1126/science.284.5420.1654
Description
Summary:Oxygen-isotope ratios of precipitation (δ 18 O P ) inferred from deep-lake ostracods from the Ammersee (southern Germany) provide a climate record with decadal resolution. The record in detail shows many of the rapid climate shifts seen in central Greenland ice cores between 15,000 and 5000 years before the present (B.P.). Negative excursions in the estimated δ 18 O P from both of these records likely reflect short weakenings of the thermohaline circulation caused by episodic discharges of continental freshwater into the North Atlantic. Deviating millennial-scale trends, however, indicate that climate gradients between Europe and Greenland changed systematically, reflecting a gradual rearrangement of North Atlantic circulation during deglaciation.

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