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SUMMARY:Globally Significant CO2 Emissions From Katla\, a Subglacial Volca
 no in Iceland - Evgenia Ilyinskaya\, University of Leeds
DTSTART:20181024T110000Z
DTEND:20181024T120000Z
UID:TALK113560@talks.cam.ac.uk
CONTACT:Emily Mason
DESCRIPTION:Volcanoes are a key natural source of CO2\, but global estimat
 es of volcanic CO2 flux are predominantly based on measurements from a fra
 ction of world's actively degassing volcanoes. We combine high‐precision
  airborne measurements from 2016 and 2017 with atmospheric dispersion mode
 ling to quantify CO2 emissions from Katla\, a major subglacial volcanic ca
 ldera in Iceland that last erupted 100 years ago but has been undergoing s
 ignificant unrest in recent decades. Katla's sustained CO2 flux\, 12–24 
 kt/d\, is up to an order of magnitude greater than previous estimates of t
 otal CO2 release from Iceland's natural sources. Katla is one of the large
 st volcanic sources of CO2 on the planet\, contributing up to 4% of global
  emissions from nonerupting volcanoes. Further measurements on subglacial 
 volcanoes worldwide are urgently required to establish if Katla is excepti
 onal\, or if there is a significant previously unrecognized contribution t
 o global CO2 emissions from natural sources.
LOCATION: Harker 2\, Department of Earth Sciences\, Downing Street
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