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SUMMARY:Trends and emissions of ammonia and its influence on air quality i
 n the UK deduced with satellite and surface observations and the GEOS-Chem
  model - Dr. Eloise Marais\, University College London
DTSTART:20201130T110000Z
DTEND:20201130T120000Z
UID:TALK151924@talks.cam.ac.uk
CONTACT:76948
DESCRIPTION:Ammonia contributes to the formation of fine particles or PM2.
 5 that are hazardous to our health. Its relative contribution to PM2.5 is 
 increasing in Europe\, North America and China due decline in sulfate from
  policies targeting SO2 sources and decline in nitrate from policies targe
 ting NOx sources. There are no direct controls on ammonia from agriculture
 \, the largest ammonia source in the UK\, and it is notoriously difficult 
 to accurately estimate emissions of ammonia due to dependence on farming a
 ctivity and environmental factors. In this talk\, I will present research 
 underway in my group to determine long-term changes of ammonia in cities i
 n the UK\, to estimate emissions of ammonia throughout the UK\, to evaluat
 e the UK National Atmospheric Emission Inventory representation of ammonia
  emissions\, and to assess regional influence of ammonia on air quality in
  a UK city.
LOCATION:Zoom: https://us02web.zoom.us/j/89471866908?pwd=THAxZDNzc2ZhSURyR
 mh6VGtpSXAyQT09
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