dc.contributor.author | Cooper, CL | |
dc.contributor.author | Swindles, GT | |
dc.contributor.author | Watson, ET | |
dc.contributor.author | Savov, IP | |
dc.contributor.author | Galka, M | |
dc.contributor.author | Gallego-Sala, AV | |
dc.contributor.author | Borken, W | |
dc.date.accessioned | 2018-11-15T13:30:55Z | |
dc.date.issued | 2018-11-22 | |
dc.description.abstract | Tephrochronology is an increasingly important tool for the dating of sediment and
peat profiles for palaeoecological, palaeoclimatic and archaeological research.
However, although much work has been done on tephra in temperate peatlands,
there have been very few in-depth investigations of permafrost peatlands. Here we
present the analysis of nine peatland cores from Abisko, northern Sweden, and show
that the presence of tephra layers may be highly variable even over a scale of <10
km. Using electron probe microanalysis (EPMA) combined with age-depth profiles
compiled from radiocarbon (14C) and 210Pb dating of peat records, we identify the
Hekla 1104, Hekla 1158, Hekla-Selsund and the Hekla 4 tephra layers. We also infer
the presence of the Askja 1875 tephra, in addition to an unassigned tephra dating
from between 1971-1987 AD in two separate cores. Five of the nine analysed cores
do not contain distinct tephra layers. Volcanic ash deposits in northern Scandinavia
are subject to both regional-scale variations in climate and atmospheric circulation,
and local-scale variations on the order of tens of kilometres in topography,
vegetation, snow cover, and ground permeability. The extreme inconsistency of
tephra preservation within a small study area (~3000 km2) brings into question the
reliability of tephrochronology within permafrost peatlands, and highlights the
necessity of alternative methods for dating peat profiles in this region. | en_GB |
dc.description.sponsorship | Claire Cooper acknowledges a Leeds Anniversary Research Scholarship at the
University of Leeds, in addition to support from the Climate Research Bursary Fund
awarded by the Priestley International Centre for Climate. Elizabeth Watson was
funded by NERC funded Doctoral Training Grant NE/K500847/1. We acknowledge
the Worldwide University Network (WUN) for funding this project (Project: Arctic
Environments, Vulnerabilities and Opportunities) | en_GB |
dc.identifier.citation | Vol. 50, pp. 16-28. | en_GB |
dc.identifier.doi | 10.1016/j.quageo.2018.11.001 | |
dc.identifier.uri | http://hdl.handle.net/10871/34778 | |
dc.language.iso | en | en_GB |
dc.publisher | Elsevier | en_GB |
dc.rights.embargoreason | Under embargo until 22 November 2019 in compliance with publisher policy. | en_GB |
dc.rights | © 2018 Elsevier B.V. All rights reserved. | |
dc.title | Evaluating tephrochronology in the permafrost peatlands of Northern Sweden | en_GB |
dc.type | Article | en_GB |
dc.identifier.issn | 1871-1014 | |
dc.description | This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record. | en_GB |
dc.identifier.journal | Quaternary Geochronology | en_GB |