A 7500-year peat-based palaeoclimatic reconstruction and evidence for an 1100-year cyclicity in bog surface wetness from Temple Hill Moss,Pentland Hills,southeast Scotland |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;2. Laboratory of Critical Zone Evolution, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China;3. Department of Earth and Environmental Sciences, The University of Michigan, Ann Arbor, MI 48109-1005, USA;1. Department of Geography & Environment, School of Geosciences, University of Aberdeen, Elphinstone Road, Aberdeen AB24 3UF, UK;2. Cambridge Archaeological Unit, Department of Archaeology, University of Cambridge, 34A Storeys Way, Cambridge, CB3 ODT, UK;3. Early Mines Research Group, Ashtree Cottage, 19, The High Street, Fen Ditton, Cambridgeshire CB5 8ST, UK;4. Departamento de Edafología y Química Agrícola, Facultad de Biología, Universidad de Santiago, Campus Sur, 15782 Santiago de Compostela, Spain;5. School of Science and Technology, University of Northampton, Newton Building, Northampton NN2 6JD, UK;6. Department of Geography, Rhodes University, Grahamstown, 6140, Eastern Cape, South Africa;1. Department of Environmental Resources and Geohazards, Institute of Geography and Spatial Organization, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland;2. GFZ German Research Centre for Geosciences, Section 5.2–Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany;3. Department of Biogeography and Paleoecology, Adam Mickiewicz University, Krygowskiego 10, 61-680 Poznań, Poland;4. Laboratory of Wetland Ecology and Monitoring, Adam Mickiewicz University, Krygowskiego 10, 61-680 Poznań, Poland;5. Department of Invertebrate Zoology and Hydrobiology, University of ?ód?, Banacha 12/16, 90-237 ?ód?, Poland;6. Institute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland;7. Institute of Geology, Faculty of Geographical and Geological Science, Adam Mickiewicz University, Maków Polnych, 16 61-606 Poznań, Poland;8. Institute of Geography, Pedagogical University of Cracow, Podchor??ych 2, 30-084 Kraków, Poland;9. Kujawsko–Pomorski Research Centre, Institute of Technology and Life Sciences in Falenty, Glinki 60, 85-174 Bydgoszcz, Poland;10. Geology and Paleogeography Unit, Faculty of Geosciences, Institute of Marine and Coastal Sciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;11. Department of Geomorphology and Palaeogeography, Faculty of Geographical Sciences, University of ?ód?, ul. Narutowicza 88, PL 90-139 ?ód?, Poland;12. GADAM Centre of Excellence, Department of Radioisotopes, Institute of Physics – CSE, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland |
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| Abstract: | Analyses of plant macrofossils, peat humification and testate amoebae were used to reconstruct a proxy climate record spanning the last 7500 years from an ombrotrophic bog, Temple Hill Moss, in southeast Scotland. The plant macrofossil data were subjected to detrended correspondence analysis (DCA) which modelled effectively the significant wet shifts within the record. A mean water table depth transfer function was applied to the testate amoebae data to provide quantifiable changes. The three proxy records show coherent phase changes which are interpreted as variability in past effective precipitation. Two tephra horizons (Glen Garry and Lairg A) were used in conjunction with radiocarbon dates to construct an age/depth model, producing a robust geochronology from which a time series was calculated. The palaeoclimatic reconstruction identified major wet shifts throughout the Holocene, with specific events occurring around cal. 6650, 5850, 5300, 4500, 3850, 3400, 2800–2450, 1450–1350 and 250–150 BP. Spectral analysis of the plant macrofossil DCA and colorimetric humification data produced a millennial scale periodicity of 1100 years. The same periodicity has also been found in a palaeoclimatic reconstruction from a site in Cumbria (Walton Moss), and may be linked with millennial scale periodicities found in oceanic palaeoclimatic records. |
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