| PALEOLIMNOLOGY |
Rapid environmental changes in southern Europe during the last glacial period
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Allen, J.R.M., B. Huntley, J.F.W. Negendank. 1999. Rapid environmental changes in southern Europe during the last glacial
period. Nature Vol. 400, pp. 740-743, 19 Aug 1999
| Data Coverage |
North: 40.93333 * South: 40.93333 |
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West: 15.5833 * East: 15.5833 |
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Altitude: 656 m |
Start Year: 101768 cal yr BP * End Year: 58 cal yr BP
Data: Please Cite Data Contributors!
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Summary: Oxygen-isotope records from Greenland ice cores indicate numerous rapid climate fluctuations during the last glacial period.
North Atlantic marine sediment cores show comparable variability in sea surface temperature and the deposition of ice-rafted
debris. In contrast, very few continental records of this time period provide the temporal resolution and environmental sensitivity
necessary to reveal the extent and effects of these environmental fluctuations on the continents. Here we present high-resolution
geochemical, physical and pollen data from lake sediments in Italy and from a Mediterranean sediment core, linked by a common
tephrochronology. Our lacustrine sequence extends to the past 102,000 years. Many of its features correlate well with the
Greenland ice-core records, demonstrating that the closely coupled ocean-atmosphere system of the Northern Hemisphere during
the last glacial extended its influence at least as far as the central Mediterranean region. Numerous vegetation changes were
rapid, frequently occurring in less than 200 years, showing that the terrestrial biosphere participated fully in last-glacial
climate variability. Earlier than 65,000 years ago, our record shows more climate fluctuations than are apparent in the Greenland
ice cores. Together, the multi-proxy data from the continental and marine records reveal differences in the seasonal character
of climate during successive interstadials, and provide a step towards determining the underlying mechanisms of the centennial-millennial-scale
variability.
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