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SUMMARY:Will climate-volcano interactions be modulated by ongoing climate 
 change? Perspective from explosive eruption column rise. - Thomas Aubry\, 
 University of Cambridge
DTSTART:20190603T131500Z
DTEND:20190603T141500Z
UID:TALK123889@talks.cam.ac.uk
CONTACT:Scott Archer-Nicholls
DESCRIPTION: Volcanic eruption plumes reaching the stratosphere result in 
 the formation of long-lived (1-2 years) sulfate aerosols\, which interact 
 with Sun and Earth radiation and alter the radiative balance of our planet
 . In particular\, stratospheric volcanic aerosol forcing results in a net 
 cooling of Earth’s surface. As CO2 concentration increases due to anthro
 pogenic emissions\, changing weather and climate may affect multiple proce
 sses that govern the climatic impact of volcanic eruptions. Will we experi
 ence increased or decreased volcanic cooling on a warming Earth? I will di
 scuss this question focusing mostly on processes related to the dynamics o
 f volcanic plumes and the subsequent injection of sulfur gases into the st
 ratosphere.\n\nFirst\, I will give a brief overview of models for the rise
  of volcanic columns\, and of my work to assess and improve their skills f
 or predicting volcanic plume heights. Second\, I will use 1D and 3D plume 
 models along with climate model projections to investigate the potential e
 ffects of climate change on plume dynamics and climatic impacts of future 
 eruptions. I will show that reduced volcanic sulfur injections into the st
 ratosphere are projected with ongoing climate change. A novel feedback hyp
 othesis emerging from this work is that volcanic cooling may be reduced on
  a warming Earth. Last\, I will discuss my ongoing work  to quantify clima
 te-volcano feedbacks related to plume dynamics in the UK Earth System Mode
 l\, along with feedbacks related to the life cycle of volcanic sulfate aer
 osols in the atmosphere.
LOCATION:Unilever  Lecture Theatre\,  Department of Chemistry
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