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BEGIN:VEVENT
CATEGORIES:Lectures and Seminars,SMAST,SMAST Seminar Series
DESCRIPTION:Seminar AnnouncementDepartment of Estuarine and Ocean Sciences 
 "​Low-pressure storms drive nitrous oxide emissions in the Southern Ocea
 n"​Dr. David NicholsonAssociate Scientist, Marine Chemistry & Geochemist
 ry Department, WHOI Wednesday, October 7, 202612:30 - 1:30 pmSMAST E 101-1
 03 and via Zoom Abstract: Nitrous oxide is a potent greenhouse gas and the
  primary ozone-depleting agent of the 21stcentury, but marine emissions of
  nitrous oxide remain difficult to constrain due to their spatiotemporal v
 ariability. In the Southern Ocean, where extratropical cyclones create con
 ditions conducive to air-sea gas flux, shipboard measurements are unlikely
  to capture the full extent of nitrous oxide emissions due to the impracti
 cality of sampling said storms. Here, we use machine learning to derive ni
 trous oxide observations from biogeochemical Argo floats, revealing that l
 ow-pressure storms amplify air-sea gradients and create hotspots of emissi
 ons. Taking these low-pressure storms into account, rather than assuming 1
  atmosphere (the standard condition outside of storms), increases the ne
 t annual Southern Ocean nitrous oxide flux by 88%. Our results imply that 
 the Southern Ocean plays a significant role in the global nitrous oxide cy
 cle, and may be a weaker overall sink of greenhouse gases than previously 
 thought. A published paper on this topic can be found at the following web
 site- https://www.nature.com/articles/s41467-026-68744-2 Join Meetinghttps
 ://umassd.zoom.us/j/97440069270Note: Meeting ID and passcode required, ema
 il contact to obtain. For additional information, please contact Callie Ru
 mbut at c.rumbut@umassd.edu\nEvent page: https://www.umassd.edu/events/cms
 /10-7-26-low-pressure-storms-drive-nitrous-oxide-drive-nitrous-oxide-emiss
 ions.php\nEvent link: https://umassd.zoom.us/j/97440069270
X-ALT-DESC;FMTTYPE=text/html:<html><body><p>Seminar Announcement<br>Departm
 ent of Estuarine and Ocean Sciences</p>\n<p>"​Low-pressure storms drive 
 nitrous oxide emissions in the Southern Ocean"<br>​Dr. David Nicholson<b
 r>Associate Scientist\, Marine Chemistry & Geochemistry Department\, WHOI<
 /p>\n<p>Wednesday\, October 7\, 2026<br>12:30 - 1:30 pm<br>SMAST E 101-103
  and via Zoom</p>\n<p>Abstract:</p>\n<p>Nitrous oxide is a potent greenhou
 se gas and the primary ozone-depleting agent of the 21stcentury\, but mari
 ne emissions of nitrous oxide remain difficult to constrain due to their s
 patiotemporal variability. In the Southern Ocean\, where extratropical cyc
 lones create conditions conducive to air-sea gas flux\, shipboard measurem
 ents are unlikely to capture the full extent of nitrous oxide emissions du
 e to the impracticality of sampling said storms. Here\, we use machine lea
 rning to derive nitrous oxide observations from biogeochemical Argo floats
 \, revealing that low-pressure storms amplify air-sea gradients and create
  hotspots of emissions. Taking these low-pressure storms into account\, ra
 ther than assuming 1 atmosphere (the standard condition outside of storm
 s)\, increases the net annual Southern Ocean nitrous oxide flux by 88%. Ou
 r results imply that the Southern Ocean plays a significant role in the gl
 obal nitrous oxide cycle\, and may be a weaker overall sink of greenhouse 
 gases than previously thought.</p>\n<p>A published paper on this topic can
  be found at the following website- https://www.nature.com/articles/s41467
 -026-68744-2</p>\n<p>Join Meeting<br><a href="https://umassd.zoom.us/j/974
 40069270">https://umassd.zoom.us/j/97440069270</a><br>Note: Meeting ID and
  passcode required\, email contact to obtain.</p>\n<p>For additional infor
 mation\, please contact Callie Rumbut at c.rumbut@umassd.edu</p><p>Event p
 age: <a href="https://www.umassd.edu/events/cms/10-7-26-low-pressure-storm
 s-drive-nitrous-oxide-drive-nitrous-oxide-emissions.php">https://www.umass
 d.edu/events/cms/10-7-26-low-pressure-storms-drive-nitrous-oxide-drive-nit
 rous-oxide-emissions.php</a><br>Event link: <a href="https://umassd.zoom.u
 s/j/97440069270">https://umassd.zoom.us/j/97440069270</a></p></body></html
 >
DTSTAMP:20261001T111647
DTSTART;TZID=America/New_York:20261007T123000
DTEND;TZID=America/New_York:20261007T133000
LOCATION:SMAST East 101-103
SUMMARY;LANGUAGE=en-us:Low-pressure storms drive nitrous oxide emissions in
  the Southern Ocean
UID:fb46715367fd979356b4ce8257386e3f@www.umassd.edu
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