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Assessing the impact of volcanic activity on mid-Holocene climate in Ireland: the need for replicate data

Jackie Hatton

Department of Geography, Amory Building, University of Exeter, Exeter EX4 4RJ, UK

Ulrike Huber

INSTAAR, University of Colorado, Boulder, Colorado 80309, USA

Richard Chiverrell

Discipline of Geography, University College of Ripon and York St John, York Y03 7EX, UK

Nick Woolley

Department of Geography, Royal Holloway College, University of London, Egham, TW2O OEX

Analyses of pollen, tephra, mineral input and degree of peat humification from three neighbouring raised peat profiles at Corlea, central Ireland, covering the period of the deposition of a tephra layer dated to just before 2290 cal. BC, and thought to represent Hekla-4 (2310±20 BC), are used to show the problems of relying on data from a single profile when invoking relationships between volcanic activity, climate and ecosys-tem response. While there appears to be a strong correlation between tephra deposition and flooding of the bog surface in one profile, with a short-lived increase in the rate of peat accumulation, comparison with the other two records suggests that peat had already begun a trend to a less humified condition before tephra deposition, and that evidence of local bog surface flooding was neither consistent nor synchronous.

Key Words: Pollen • humification • tephra • Hekla 4 • volcanic impact • climate change • Ireland • mid-Holocene

The Holocene, Vol. 8, No. 1, 105-111 (1998)
DOI: 10.1191/095968398676397681


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