Tephrochronology of North Europe during the last 1000 years – a contribution to the MILLENNIUM project
2007 (English)In: XVII INQUA Congress, July 28-August 3 2007, Cairns, Australia. Programs with Abstracts, 2007Conference paper (Other academic)
The Millennium project is a multidisciplinary consortium of more than 39 European universities and research institutes, with the aim of answering a single question: Does the magnitude and rate of 20th Century climate change exceed the natural variability of European climate over the last millennium? One aspect of this project includes high-resolution investigation of different palaeoclimatic archives such as lake, peat, marine and ice-core records covering the last 1000 years. A key objective of Millennium is to examine the lead and lag responses between these different archives, which requires synchronisation of these proxy records on common timescales. Here we report on the use of tephrochronology for achieving this goal. The detection of tephras in more distal areas now provides the opportunity for improving and validating chronological models and for producing precise tie-points between sparsely located records. For the purposes of the Millennium project and also for other similar studies that focus on the last 1000 years, we demonstrate the applicability of employing tephra horizons from Icelandic volcanic eruptions for the precise correlation of palaeoclimatic archives in northern Europe. For instance, tephra associated with the Hekla-1 (AD 1104), Öræfajökull (AD 1362), Veidivötn (AD 1477) and Askja (AD 1875) eruptions have been widely dispersed in northern Europe. These isochrones are used to date and synchronise the different Millennium archives.
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IdentifiersURN: urn:nbn:se:su:diva-21575OAI: oai:DiVA.org:su-21575DiVA: diva2:188102