The transport of Icelandic volcanic ash: insights from northern European cryptotephra records
MetadataShow full item record
Fine ash produced during volcanic eruptions can be dispersed over a vast area, where it poses a threat to aviation, human health, and infrastructure. We analyze the particle size distributions, geochemistry, and glass shard morphology of 19 distal (>1000 km from source) volcanic ash deposits distributed across northern Europe, many geochemically linked to a specific volcanic eruption. The largest glass shards in the cryptotephra deposits were 250 µm (longest axis basis). For the first time, we examine the replicability and reliability of glass shard size measurements from peatland and lake archives. We identify no consistent trend in the vertical sorting of glass shards by size within lake and peat sediments. Measuring the sizes of 100 shards from the vertical sample of peak shard concentration is generally sufficient to ascertain the median shard size for a cryptotephra deposit. Lakes and peatlands in close proximity contain cryptotephras with significantly different median shard size in four out of five instances. The trend toward a greater amount of larger shards in lakes may have implications for the selection of distal sites to constrain the maximum glass shard size for modeling studies. Although the 95th percentile values for shard size generally indicate a loss of larger shards from deposits at sites farther from the volcano, due to the dynamic nature of the controls on tephra transport even during the course of one eruption there is no simple relationship between median shard size and transport distance.
Watson , E J , Swindles , G T , Stevenson , J A , Savov , I & Lawson , I T 2016 , ' The transport of Icelandic volcanic ash: insights from northern European cryptotephra records ' Journal of Geophysical Research: Solid Earth , vol 121 , no. 10 , pp. 7177-7192 . DOI: 10.1002/2016JB013350
Journal of Geophysical Research: Solid Earth
© 2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This research was undertaken while Elizabeth Watson held a NERC-funded Doctoral Training grant (NE/K500847/1).
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Showing items related by title, author, creator and subject.
Twentieth-century poetry and science : science in the poetry of Hugh MacDiarmid, Judith Wright, Edwin Morgan, and Miroslav Holub Gibson, Donald (University of St Andrews, 2015-12-14) - ThesisThe aim of this thesis is to arrive at a characterisation of twentieth century poetry and science by means of a detailed study of the work of four poets who engaged extensively with science and whose writing lives spanned ...
Integration of an active research data system with a data repository to streamline the research data lifecycle : Pure-NOMAD case study Conte, Simone Ivan; Fina, Federica; Psalios, Michalis; Reyal, Shyam Mehraaj; Lebl, Tomas; Clements, Anna (2017-02-20) - Conference paperResearch funders have introduced requirements that expect researchers to properly manage and publicly share their research data, and expect institutions to put in place services to support researchers in meeting these ...
Boyd, Ian L. (2017-09-19) - Journal item