Summary: Palaeovolcanic forcing of short-term dendroisotopic depletion:
The effect of decreased solar intensity on Irish oak
Neil Ogle,1,2
Chris S. M. Turney,1
Robert M. Kalin,3
Louise O'Donnell,3
and C. John Butler4
Received 28 September 2004; revised 24 November 2004; accepted 18 January 2005; published 22 February 2005.
[1] The climatic effects of historical volcanic eruptions are
well documented in the literature. What are less certain
however, are the effects of eruptions on more distant
environments, particularly vegetation. Here we present sub-
annual d13
C records from two high-resolution Irish oak
(Quercus spp.) chronologies that span the Laki (Gri´msvo¨tn)
1783­84 and Tambora 1815 eruptions. In both instances, a
significant depletion in d13
C is recorded within the trees
following the eruption ($1.8%). Historical meteorological
datasets from observatories near to the trees sampled

Source: Armagh Observatory

Collections: Physics