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SUMMARY:Rethinking Aerosol Sulfate Formation in the Marine Boundary Layer: 
 New Insights Learned From Flying Through Clouds
LOCATION:Virtual Seminar
TZID:America/Denver
DTSTART:20211013T160000
UID:2026-04-15-12-55-00@natsci.colostate.edu
DTSTAMP:20260415T125500
Description:About the Seminar:\n\nOcean emissions of dimethyl sulfide (DMS)
  are a major precursor for the production and growth of aerosol particles\
 , which can act as seeds for the formation of cloud droplets in the marine
  atmosphere with the subsequent impacts on Earth’s climate. Global aircr
 aft observations indicate that DMS is efficiently oxidized to hydroperoxym
 ethyl thioformate (HPMTF)\, a previously unrecognized molecule\, which nec
 essitates revisiting DMS oxidation chemistry in the marine atmosphere. In 
 this seminar\, I will show through ambient observations\, laboratory studi
 es\, and global modelling that a dominant loss pathway for HPMTF is uptake
  into cloud droplets. This loss process short circuits gas-phase oxidation
  and significantly alters the dynamics of aerosol production and growth in
  the marine atmosphere and the production of long-lived precursors for str
 atospheric sulfate production.\n\n\n\nPhoto Credit: Sam Hall (NCAR)\n\nAbo
 ut the Speaker:\n\nTimothy Bertram received a PhD in physical chemistry at
  the University of California-Berkeley and conducted a NOAA Climate and Gl
 obal Change post-doctoral fellowship in Atmospheric Science at the Univers
 ity of Washington. He is now a Professor in the Department of Chemistry\, 
 Atmospheric and Oceanic Studies\, and the Environmental Chemistry and Tech
 nology Program at the University of Wisconsin-Madison. His research focuse
 s on field and laboratory measurements of chemical reactions occurring at 
 atmospheric interfaces and the development of novel instrumentation for at
 mospheric measurement. He is the Associate Director of the NSF Center for 
 Aerosol Impacts on Chemistry of the Environment.\n\nJoin Zoom Meeting\nhtt
 ps://zoom.us/j/94976316662?pwd=d29UQmpHQ0xtc1M0VTdUbDhldktYZz09\n\nMeeting
  ID: 949 7631 6662\nPasscode: 635287\n\nJoin by SIP\n94976316662@zoomcrc.c
 om 4:00 pm
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