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SUMMARY:Toward understanding iodine and sulfur secondary aerosol formation
  in marine atmosphere - Xu-Cheng He -  University of Helsinki/University o
 f Cambridge
DTSTART:20240312T110000Z
DTEND:20240312T120000Z
UID:TALK212029@talks.cam.ac.uk
CONTACT:Vichawan (Print) Sakulsupich
DESCRIPTION:Clouds in marine and polar atmospheres play a pivotal role in 
 shaping climate dynamics through intricate cloud-radiation interactions. O
 f particular significance are secondary aerosols\, stemming from gas precu
 rsors\, which act as potential nuclei for cloud droplets\, exerting influe
 nce on cloud reflectivity and lifespan. This\, in turn\, has indirect impa
 cts on climate. Despite their critical impact\, the formation processes of
  marine and polar aerosols remain insufficiently explored due to experimen
 tal and logistical challenges. This presentation will present evidence dra
 wn from field observations and laboratory experiments\, underscoring the i
 mportance of iodine and sulfur species as key aerosol sources in polar and
  marine atmospheres. Our field observations expose the presence of HIO3 in
  diverse environments\, including polar regions\, boreal forests\, marine 
 sites\, and urban areas. By combining global observations and laboratory e
 xperiments\, we reveal the potential widespread involvement of iodic acid 
 and iodous acid in marine secondary aerosol formation\, challenging the tr
 aditional association of iodine aerosols solely with mid-latitudinal regio
 ns. To comprehensively grasp the worldwide implications of iodine and sulf
 ur aerosol formation processes\, a systematic analysis integrating ambient
  observations\, laboratory experiments\, and global simulations is deemed 
 imperative.\n\n\n----------------\n\nCAS UnionRoad is inviting you to a sc
 heduled Zoom meeting.\n\nTopic: CAS seminar: Dr Xu-Cheng He\nTime: Mar 12\
 , 2024 11:00 AM London\n\nJoin Zoom Meeting\nhttps://us02web.zoom.us/j/823
 47604021?pwd=OTBaU1M5dXRUU0lnQlhtN1hmRkR4dz09\n\nMeeting ID: 823 4760 4021
 \nPasscode: 916884\n\n
LOCATION:Chemistry Dept\, Unilever Lecture Theatre and Zoom
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