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SUMMARY:Iodine compounds in polar regions and their relevance to regional 
 aerosol & climate. - Dr Howard K Roscoe\, British Antarctic Survey
DTSTART:20160425T131500Z
DTEND:20160425T141500Z
UID:TALK64894@talks.cam.ac.uk
CONTACT:Paul Griffiths
DESCRIPTION:Measurements of iodine compounds in the sea ice zone of the We
 ddell Sea in Antarctica\, in 2009\, showed that most are emitted as I2 rat
 her than other inorganic iodine compounds or iodocarbons.  Formation of ne
 w particles was also observed in the sea ice zone\, consistent with earlie
 r measurements in the sea ice zone and with model predictions of particle 
 formation from iodine compounds.  Measurements in Arctic first-year sea ic
 e in 2010 showed similar amounts of some iodine compounds to those of Anta
 rctica.  Particles\, iodine monoxide\, and sulphur compounds in aerosol\, 
 were measured for several years at two Weddell Sea coastal sites\; the res
 ults showed strong correlation between IO and particles in 10-day averaged
  data\, but not in hourly data.  This suggests that most new-particle form
 ation occurred well offshore and so the particles were viable\, which has 
 implications for regional climate via the aerosol indirect effect. 
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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