European summer temperature response to annually dated volcanic eruptions over the past nine centuries

Esper, Jan; Schneider, Lea; Krusic, Paul J.; Luterbacher, Jürg; Büntgen, Ulf; Timonen, Mauri; Sirocko, Frank; Zorita, Eduardo (2013). European summer temperature response to annually dated volcanic eruptions over the past nine centuries. Bulletin of volcanology, 75(7), p. 736. Springer 10.1007/s00445-013-0736-z

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The drop in temperature following large volcanic eruptions has been identified as an important component of natural climate variability. However, due to the limited number of large eruptions that occurred during the period of instrumental observations, the precise amplitude of post-volcanic cooling is not well constrained. Here we present new evidence on summer temperature cooling over Europe in years following volcanic eruptions. We compile and analyze an updated network of tree-ring maximum latewood density chronologies, spanning the past nine centuries, and compare cooling signatures in this network with exceptionally long instrumental station records and state-of-the-art general circulation models. Results indicate post-volcanic June–August cooling is strongest in Northern Europe 2 years after an eruption (−0.52 ± 0.05 °C), whereas in Central Europe the temperature response is smaller and occurs 1 year after an eruption (−0.18 ± 0.07 °C). We validate these estimates by comparison with the shorter instrumental network and evaluate the statistical significance of post-volcanic summer temperature cooling in the context of natural climate variability over the past nine centuries. Finding no significant post-volcanic temperature cooling lasting longer than 2 years, our results question the ability of large eruptions to initiate long-term temperature changes through feedback mechanisms in the climate system. We discuss the implications of these findings with respect to the response seen in general circulation models and emphasize the importance of considering well-documented, annually dated eruptions when assessing the significance of volcanic forcing on continental-scale temperature variations.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Climatology
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Luterbacher, Jürg and Büntgen, Ulf

Subjects:

900 History > 910 Geography & travel
500 Science > 550 Earth sciences & geology

ISSN:

0258-8900

Publisher:

Springer

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

08 Aug 2014 08:31

Last Modified:

19 Oct 2015 09:26

Publisher DOI:

10.1007/s00445-013-0736-z

Uncontrolled Keywords:

Volcanic forcing, Tree-rings, Climate, Instrumental stations, Maximum latewood density, Europe

BORIS DOI:

10.7892/boris.49656

URI:

https://boris.unibe.ch/id/eprint/49656

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