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SUMMARY:Dual air quality benefit of SO2 emission controls by decreasing su
 lfate and biogenic secondary organic aerosol - Dr Eloïse Marais\, Univers
 ity of Birmingham
DTSTART:20171120T141500Z
DTEND:20171120T151500Z
UID:TALK77781@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:Air quality policy to decrease fine particles (PM2.5) hazardou
 s to human health has mainly targeted sulfate aerosol through controls on 
 sulfur dioxide (SO2) sources. In the Southeast US both sulfate and organic
  aerosol (OA) have declined\, but the cause of the OA trend is uncertain. 
 I will show with surface\, aircraft and satellite observations and an atmo
 spheric chemistry model that decline in anthropogenic sulfate is responsib
 le for the decline in OA by concurrently decreasing sulfate and secondary 
 organic aerosol (SOA) from biogenic sources. This provides support for a d
 ual benefit of SO2 emission controls and is a harbinger of doom for the tr
 opics as high biogenic emissions and an appetite for fossil fuels similar 
 to the US may have devastating effects on air quality there.
LOCATION:Pfizer Lecture Theatre\, Department of Chemistry
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