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SUMMARY:Polar Ozone – open issues and first results from RECONCILE - Dr 
 Marc von Hobe\, Forschungszentrum Juelich\, Germany
DTSTART:20100426T131500Z
DTEND:20100426T141500Z
UID:TALK24035@talks.cam.ac.uk
CONTACT:Dr Francis Pope
DESCRIPTION:25 years of extensive research following the discovery of the 
 “Ozone Hole” by Farman et al.\, have unraveled the relationship betwee
 n the rapid decline in ozone over the poles in spring and anthropogenic em
 issions of CFCs and the Montreal Protocol and its subsequent amendments ba
 nning these substances will eventually lead to full recovery of the ozone 
 layer. However\, we have not yet reached full quantitative understanding o
 f all the chemical and physical processes governing stratospheric ozone at
  high latitudes\, and our predictive capabilities in a world of rapid clim
 ate change – possibly even involving changes to the stratosphere due to 
 human geoengineering – are far from sufficient.\n\nThe EU-project "RECON
 CILE":https://www.fp7-reconcile.eu (Reconciliation of essential process pa
 rameters for an enhanced predictability of arctic stratospheric ozone loss
  and its climate interactions) sets out to resolve the open issues and to 
 improve current predictive models. Using laboratory experiments\, field me
 asurements and modeling studies\, four central objectives are being addres
 sed:\n \n# Reach quantitative understanding of the chemistry leading to po
 lar ozone depletion\n# Improve our understanding of polar stratospheric cl
 oud (PSC) microphysics and heterogeneous chlorine activation\n# Quantify t
 he flux and mixing of air through the vortex edge and its impact on polar 
 and mid-latitude ozone\n# Incorporate the improved parameterisations into 
 a Chemistry Climate Model (CCM) to generate more reliable predictions for 
 the future evolution of the ozone layer and its effects and sensitivities 
 to climate\, and test the improved CCM simulations against observed trends
 .\n\nIn my presentation\, I will discuss open questions related to polar o
 zone and explain\, how we will try to answer them within RECONCILE. I will
  also present first results from the "recent field campaign with the high-
 flying aircraft M55-Geophysica from Kiruna\, Sweden":https://www.fp7-recon
 cile.eu/diary.html .\n
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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