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SUMMARY:Volcanic forcing of climate: Insights from sulfur isotopes and tep
 hra in ice cores - Andrea Burke\, University of St. Andrews
DTSTART:20251022T163000Z
DTEND:20251022T180000Z
UID:TALK237535@talks.cam.ac.uk
CONTACT:Emily Kraus
DESCRIPTION:Volcanic eruptions can be viewed as experiments with our clima
 te system\, where the radiative balance of the planet is perturbed on the 
 timescale of years. Investigating the wide-ranging responses to these indi
 vidual events can improve understanding of the feedbacks\, processes\, and
  sensitivities of the climate system to sulfuric acid aerosols. Our best r
 ecords of past volcanic eruptions come from polar ice cores: records of su
 lfate concentrations and isotopes inform sulfur aerosol loads and the geoc
 hemistry of small volcanic ash particles\, or ‘cryptotephra’\, enable 
 identification of volcanic source. Here I will reconstruct the forcing fro
 m some of the major volcanic eruptions over the last 2\,500 years\, highli
 ghting the strong sensitivity of Northern Hemisphere summer temperatures t
 o Northern Hemisphere extratropical eruptions. Looking further back in tim
 e\, I will investigate the climate response to some of the largest super e
 ruptions in the past 100\,000 years.
LOCATION:Latimer Room\, Clare College
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