BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-9659
DTSTART:20260501T203000Z
DTEND:20260501T213000Z
DTSTAMP:20260528T005804Z
LAST-MODIFIED:20260427T155903Z
LOCATION:2241 Chamberlin Hall - https://uwmadison.zoom.us/j/9692730063
 6?pwd=2Gjt5BXqG7T3FfvBQ8C5okcNldSzzn.1
SUMMARY:Aerosol Nexus in the Stratosphere\, Physics Department Colloqu
 ium\, David Fahey\, NOAA\, Director of the Chemical Sciences Laborator
 y
DESCRIPTION:Stratospheric aerosols play a central role in Earth's radi
 ative balance and atmospheric chemistry. A variety of sources both nat
 ural and anthropogenic influence the background aerosol abundance and 
 cause extreme events. Important examples are volcanic eruptions\, spac
 e traffic and wildfires. Understanding this central role requires a fo
 cus on a variety of sources with stratospheric observations and modeli
 ng studies that include chemistry\, composition\, microphysics\, radia
 tion and transport\; hence the aerosol nexus. Initiated by Congression
 al mandate\, NOAA’s Earth Radiation Budget (ERB) program was establi
 shed to study aerosol sources and aerosol processes in the troposphere
  and stratosphere. ERB includes stratospheric aerosol injection (SAI)â
 €”the concept of increasing Earth’s albedo by enhancing stratospheri
 c aerosol—which is emerging internationally as a pressing\, albeit c
 ontroversial\, research priority. The Chemical Sciences Laboratory is 
 pursuing fundamental research related to stratospheric aerosols throug
 h innovative instrumentation\, platform use\, observations and modelin
 g\, supported in part by the ERB program. I will provide some context 
 to the program and present selected research highlights\, including th
 e role of SAI in the Montreal Protocol Scientific Assessment of Ozone 
 Depletion. I am honored in giving this presentation because the guidan
 ce and mentoring I received from Professors Anderson\, Lin\, and Lawle
 r\, and the Physics Department\, had exceptional influence in my forma
 tive years.
URL:https://www.physics.wisc.edu/events/?id=9659
END:VEVENT
END:VCALENDAR