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Radiocarbon dating of a recent high latitude peat profile: Stor Åmyrân, northern Sweden

Department of Geography, University of Liverpool, Liverpool, L69 3BX, UK

R. Thompson

Department of Geology and Geophysics, The University of Edinburgh, Edimburgh, EH9 3JW, UK

P.R.J. Crooks

Department of Geography, University of Liverpool, Liverpool, L69 3BX, UK

S.J. Gedye

Department of Geography, University of Liverpool, Liverpool, L69 3BX, UK

V.A. Hall

Institute of Irish Studies, The Queen's University, Belfast, N. Ireland, BT7 1NN, UK

D.D. Harkness

NERC Radiocarbon Dating Laboratory, East Kilbride, Glasgow, G75 0QU, UK

R.A. Housley

Oxford University Radiocarbon Accelerator Unit, Research Laboratory for Archaeology and the History of Art, 6 Keble Road, Oxford, OX1 3QJ, UK

F.G. McCormac

School of Geosciences, The Queen's University of Belfast, Belfast, BT7 1NN, UK

A.J. Newton

Department of Geography, Drummond Street, University of Edinburgh, Edinburgh, EH8 9XP, UK

J.R. Pilcher

School of Geosciences, The Queen's University of Belfast, Belfast, BT7 1NN, UK

I. Renberg

Department of Environmental Health, Umeå University, S-901 87, Umeå, Sweden

N. Richardson

Department of Geography, University of Liverpool, Liverpool, L69 3BX, UK

The value of both high-precision (HP) and AMS ¹⁴C determinations in the fine-resolution dating of recent peat at Stor Åmyrân, near Umeå, northern Sweden has been explored. A detailed chronology of accumu lation, based on ¹⁴C, an occurrence of the Askja AD 1875 tephra and ²⁴¹Am measurements has been derived for the last 700 years. This shows significant changes in the mass balance of the peat profile, with minimum rates of net carbon sequestration overlapping with the period of minimum spring and summer temperature documented by published tree-ring evidence. The paper presents a methodology for calculating empirically past changes in the rate of net carbon sequestration in boreal peatlands and for exploring the effects of climatic variations (and possible future global warming) on these rates.

Key Words: Peat • radiocarbon • high-precision dating • tephra • chronology • mass balance • late Holocene • climate change • high latitudes • Sweden.

The Holocene, Vol. 7, No. 3, 283-290 (1997)
DOI: 10.1177/095968369700700304


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