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X-WR-CALNAME:Oceans at MIT
X-WR-CALDESC:Striving to understand\, harness and sustain Earth&#039\;s def
 ining frontier.
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DTSTART:20171105T020000
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RDATE:20181104T020000
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UID:20170213T120000-8ccmb0ifths3ko79iorelr6vsk@google.com
DTSTAMP:20180503T093950Z
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DESCRIPTION:Title: Monsoon circulations and tropical heterogeneous chlorine
  chemistry in the stratosphere\n\nAbstract: This seminar presents novel fi
 ndings that expand the range of latitudes over which heterogeneous chemist
 ry operates in the stratosphere.   It has long been thought that heterogen
 eous chlorine chemistry would only be important in the Antarctic and Arcti
 c.    Our new work shows that tropical heterogeneous chemistry is also imp
 ortant.    Transport processes associated with the summer monsoons bring i
 ncreased abundances of hydrochloric acid into contact with liquid sulfate 
 aerosols in the cold tropical lowermost stratosphere\, leading to heteroge
 neous chemical activation of chlorine species.   The calculations indicate
  that the spatial and seasonal distributions of chlorine monoxide and chlo
 rine nitrate near the monsoon regions of the northern hemisphere tropical 
 and subtropical lowermost stratosphere could provide indicators of heterog
 eneous chlorine processing.   In the model\, these processes impact the lo
 cal ozone budget and decrease ozoneabundances\, implying a chemical contri
 bution to longer-term northern tropical ozone profile changes at 16-19 km.
DTSTART;TZID=America/New_York:20170213T120000
DTEND;TZID=America/New_York:20170213T130000
LOCATION:Ida Green Lounge (9th Floor)\, Building 54\, Cambridge\, MA\, Unit
 ed States
SEQUENCE:0
SUMMARY:**CANCELLED** PAOC Colloquium: Susan Solomon\, MIT
URL:http://oceans.mit.edu/event/paoc-colloquium-susan-solomon-mit
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