A major widespread climatic change around 5300 cal. yr BP at the time of the Alpine Iceman

Authors

  • Michel Magny,

    Corresponding author
    1. Laboratoire de Chrono-Ecologie, Faculté des Sciences et Techniques, 16 route de Gray, 25 030 Besançon, France
    • Laboratoire de Chrono-Ecologie, Faculté des Sciences et Techniques, 16 route de Gray, 25 030 Besançon, France.
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  • Jean Nicolas Haas

    1. University of Innsbruck, Department of Botany, Division of Palynology, Systematics and Geobotany, Sternwartestraβe 15, 6020 Innsbruck, Austria
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Abstract

Palaeoenvironmental and archaeological data from Arbon Bleiche, Lake Constance (Switzerland) give evidence of a rapid rise in lake-level dated by tree-ring and radiocarbon to 5320 cal. yr BP. This rise event was the latest in a series of three successive episodes of higher lake-level between 5550 and 5300 cal. yr BP coinciding with glacier advance and tree-limit decline in the Alps. This west-central European climate change may have favoured the quick burial and the preservation of the Alpine Iceman recently found in the Tyrolean Alps. It has possible equivalents in many records from various regions in both hemispheres dating to 5600–5000 cal. yr BP and corresponds to global cooling and contrasting patterns of hydrological changes. This major mid-Holocene climate event marks the Hypsithermal/Neoglaciation transition possibly resulting from a combination of different factors including orbital forcing, changes in ocean circulation and variations in solar activity. Copyright © 2004 John Wiley & Sons, Ltd.

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