Early-Holocene climatic oscillations recorded by lake-level fluctuations in west-central Europe and in central Italy |
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| Affiliation: | 1. Laboratoire de Chrono-Ecologie, CNRS-UMR 6565, UFR des Sciences et Techniques, 16 route de Gray, 25030 Besançon, France;2. Institut Méditerranéen d’Ecologie et Paléoécologie, CNRS-UMR 6116, Europôle de l’Arbois, 13545 Aix-en-Provence cedex 4, France;3. Utrecht University, Palaeoecology, Laboratory of Palaeobotany and Palynology, Budapestlaan 4, 3584 CD Utrecht, The Netherlands;4. Laboratoire de Géosciences, UFR des Sciences et Techniques, 16 route de Gray, 25030 Besançon, France;1. Utrecht University, Department of Physical Geography, Faculty of Geosciences, P.O. Box 80115, NL-3508 TC Utrecht, The Netherlands. E-mail: w.hoek@geo.uu.nl. Tel.: +31(0)30 2532416; Fax.: +31 (0)30 2531145.;2. Vrije Universiteit Amsterdam, Faculty of Earth and Life Sciences, De Boelelaan 1085, HV Amsterdam. The Netherlands. E-mail: hanneke.bos@falw.vu.nl; Tel.:+31 20 525 7666; Fax.: +31 20 525 7832.;1. Senckenberg Research Institute and Natural History Museum & Biodiversity and Climate Research Center (BiK-F), Senckenberganlange 25, D-60325 Frankfurt am Main, Germany;2. Romanian Academy, Emil Racoviţă Institute of Speleology, Clinicilor 5, Cluj Napoca 400006, Romania;3. Stable Isotope Laboratory, Ştefan cel Mare University, Universităţii 13, 720229 Suceava, Romania;4. Department of Geology, Babeş-Bolyai University, Kogălniceanu 1, 400084 Cluj-Napoca, Romania;5. Centre for Quaternary Research, Department of Geography, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK;6. Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest H-1117, Hungary;7. School of Geosciences, University of South Florida, 4202 E. Fowler Avenue, NES 107, Tampa 33620, USA;8. Laboratory for Palaeoenvironmental Reconstruction, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia;9. Scientific Research Centre of the Slovenian Academy of Sciences and Arts (ZRC SAZU), Institute of Archaeology, Novi trg 2, SI-1001 Ljubljana, Slovenia;10. School of Geography and Environmental Science, Monash University, VIC 3800, Australia;11. National Institute of Research and Development for Biological Sciences, Institute of Biological Research, Republicii 48, 400015 Cluj Napoca, Romania;12. Department of Biogeography and Palaeoecology and Laboratory of Wetland Ecology and Monitoring, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Dzięgielowa 27, PL-61 680 Poznań, Poland;13. Geographical Institute Jovan CVIJIC of the Serbian Academy of Sciences and Arts, Djure JAKSICA 9, SRB-11000 Belgrade, Serbia;14. Faculty of Geosciences, University of Utrecht, Postbus 80.115, 3508 TC Utrecht, The Netherlands;15. Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Prague, Czech Republic;p. Centre for Archaeological Sciences, University of Leuven, Celestijnenlaan 200E, Bus 2408, 3001 Leuven, Belgium;q. GADAM Centre of Excellence, Institute of Physics-CSE, Silesian University of Technology, Krzywoustego 2, 44-100 Gliwice, Poland;r. Department of Geography, Ştefan cel Mare University, Universităţii 13, 720229 Suceava, Romania;s. Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Banacha St. 12/16, 90-237 Łódź, Poland;t. Department of Environmental Resources and Geohazard, Institute of Geography, Polish Academy of Sciences, Kopernika 19, Torun 87-100, Poland;u. GFZ German Research Centre for Geosciences, Section 5.2–Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany;v. Nature Research Centre, Institute of Geology and Geography, T. Ševčenkos Str. 13, LT-03223 Vilnius, Lithuania;w. University of Szeged, 6722 Szeged, Egyetem s. 2, Hungary;x. Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark;y. Faculty of Environmental Science and Engineering, Babeş-Bolyai University, Fântânele 30, Cluj Napoca 400294, Romania;z. Laboratory of Palynology, Department of Botany, Faculty of Biology, Sofia University “St. KlimentOhridski”, Sofia, Bulgaria;11. Balaton Limnological Institute, MTA Centre for Ecological Research, Klebelsberg Kuno 3, HU-8237 Tihany, Hungary;12. Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia;13. Long-Term Ecology Laboratory, Biodiversity Institute, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK;14. Laboratory of Geodynamic and Paleogeography, Institute For Nature Management, National Academy of Sciences of Belarus, 10, F. Skoriny Street, 220114 Minsk, Belarus;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;2. Institute of Global Environmental Change, Xi''an Jiaotong University, Xi''an 710049, China;3. Joint Center for Global Change Studies (JCGCS), Beijing 100875, China;4. Department of Earth Sciences, University of Minnesota, Minneapolis 55455, USA;5. Center for Water Research, Department of Geological Sciences, University of Texas at San Antonio, San Antonio 78249, USA;6. Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China;1. CITIMAC, Facultad de Ciencias, University of Cantabria, Avenida de los Castros s/n, 39005 Santander, Cantabria, Spain;2. Department of Geography, Prehistory and Archaeology, University of Basque Country, C/ Tomás y Valiente s/n, 01006 Vitoria-Gasteiz, Basque Country, Spain;3. Department of Geoenvironmental Processes and Global Change, Pyrenean Institute of Ecology (IPE) – CSIC, Avenida Montañana, 1005 Zaragoza, Spain;1. Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland;2. Institute of Ecology, University of Innsbruck, Austria;3. Institute of Geology, University of Innsbruck, Austria;4. GFZ German Research Centre for Geosciences, Section 5.2 Climate Dynamics and Landscape Evolution, Germany;5. Graz, Austria;6. Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Switzerland;7. Labor für Ionenstrahlphysik (LIP), ETH Zurich, Switzerland;8. Institut für Geographie, University of Innsbruck, Austria;9. Department of Physical Geography and Quaternary Geology, Stockholm University, Sweden;10. Institute for Limnology, University Innsbruck, Mondsee, Austria;11. Institut de Géographie Alpine, Université Joseph Fourier, Grenoble, France;12. Institute of Geography and Geology, University of Würzburg, Germany;1. Palaeoecology, ISEM (UMR 5554 CNRS/UM/EPHE), University of Montpellier, Place E. Bataillon, F-34090, Montpellier, France;2. Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013, Bern, Switzerland;3. Palaeoclimatology and Marine Palaeoenvironments, EPOC (UMR 5805 CNRS/UB) University of Bordeaux and EPHE PSL Research University, Allée Geoffroy Saint-Hilaire, Bât. 18, F-33615, Pessac Cedex, France;4. Department of Biogeography and Palaeoecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, B. Krygowskiego 10, 61-680, Poznań, Poland;5. Rue du Cannau, F-34000, Montpellier, France;6. Institute for Biological Research “Sinisa Stankovic”, Department of Ecology, University of Belgrade, Boulevard despota Stefana 142, 11060, Belgrade, Serbia |
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| Abstract: | On the basis of lake-level data, the period of the Preboreal oscillation (PBO) at 11 300–11 150 cal yr BP as defined by the GRIP oxygen-isotope record appears to correspond to wetter climatic conditions in west-central Europe and to a marked drying in north-central Italy. Additional short-lived phases of higher lake level have been identified before the PBO at ca 11 450–11 400 and 11 350 cal yr BP in west-central Europe, and at ca 11 500 cal yr BP in Italy. Such multiple climatic oscillations around the PBO have been observed in various records in northwestern Europe. On the basis of various proxies, a map of changes in moisture over western Europe during the PBO indicates a mid-latitude zone between 58 and 43°N characterised by wetter conditions, while a drier climate developed in southern and northern Europe. This wet middle zone shows a larger extension and suggests a more meandering, weaker Atlantic Westerly Jet during the PBO than during the 8.2 kyr event. A comparison of lake-level records in west-central Europe with (1) outbursts from North American and north-European proglacial lakes, and (2) variations in solar activity as reflected by 14C and the 10Be records supports the hypothesis that the PBO was a response to successive meltwater pulses at 11 300, 11 250, 11 200 and 11 170 cal yr BP and to a sudden decrease in solar activity at 11 250 cal yr BP. This study points to the necessity of developing integrated multi-proxy approaches to construct more robust regional event stratigraphies, and of better documenting palaeohydrological changes in the Mediterranean area. |
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