BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Pyrocumulonimbus and its Role in the Climate System: What is k
 nown and unknown?
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260912T233908Z
UID:tag:localist.com\,2008:EventInstance_48001799130549
DTSTART:20241122T170000Z
DTEND:20241122T180000Z
DESCRIPTION:Dave Peterson (Meteorologist at the US Naval Research Laborator
 y in Monterey\, California)\n\n \n\nPyrocumulonimbus (pyroCb) are fire-ind
 uced and smoke-infused thunderstorms that serve as the primary pathway for
  smoke to reach the upper troposphere and lower stratosphere (UTLS).The ma
 gnitude of smoke plumes observed in the UTLS has increased significantly i
 n recent years\, rivaling or exceeding the impact from the majority of vol
 canic eruptions observed over the last decade\, with the potential for sig
 nificant climate feedbacks on seasonal and hemispheric scales. The Black S
 ummer fire season of 2019-2020 in southeastern Australia contributed to an
  unprecedented pyroCb ‘super outbreak’ that took place over 51 non-con
 secutive hours. More than half of the 38 observed pyroCb updraft pulses in
 jected smoke particles directly into the stratosphere\, producing two of t
 he three largest smoke plumes observed at such altitudes to date. Over the
  course of three months\, these plumes encircled a large swath of the Sout
 hern Hemisphere while continuing to rise\, in a manner consistent with exi
 sting nuclear winter theory. Fewer than three years earlier\, a large pyro
 Cb outbreak in Canada produced a persistent smoke plume that encircled a p
 ortion of the Northern Hemisphere. We summarize what the community has lea
 rned from these extreme events and identify science questions that remain 
 unanswered. A recently-developed pyroCb inventory facilitates the first an
 alysis of regional\, seasonal\, monthly\, and inter-annual variability wor
 ldwide\, including during the extreme 2023 fire season in Canada. Unique i
 n-situ and remotely-sensed measurements of pyroCb activity observed during
  the 2019 FIREX-AQ field experiment identify the fire characteristics\, cl
 oud microphysical properties\, and smoke plume chemistry associated with t
 his extreme fire-weather phenomenon. Information on the recently selected 
 INjected Smoke and PYRocumulonimbus Experiment (INSPYRE) will also be prov
 ided. \n\n \n\nDr. Dave Peterson is a meteorologist at the US Naval Resear
 ch Laboratory in Monterey\, CA.  He has broad scientific interests in both
  meteorology and satellite remote sensing. Dave currently supports the US 
 Navy’s global aerosol modeling efforts\, with a focus on extreme wildfir
 es and smoke transport.  He is a leading expert on thunderstorms caused by
  intense wildfires (pyrocumulonimbus)\, and the ensuing impact on stratosp
 heric composition. Dave also serves as an interface between operational me
 teorologists\, atmospheric chemistry scientists\, and modelers\, especiall
 y during large field experiments. Dave was recently selected by NASA to th
 e lead the INjected Smoke and PYRocumulonimbus Experiment (INSPYRE)\, whic
 h will test the hypothesis that: Increasing wildfire size and intensity in
  a warming climate will amplify pyroCb-driven smoke injection into the str
 atosphere and induce measurable changes to Earth’s radiative balance.
GEO:42.3783;-71.117081
LOCATION:Pierce Hall\, 100F
SUMMARY:Pyrocumulonimbus and its Role in the Climate System: What is known 
 and unknown?
URL;VALUE=URI:https://events.seas.harvard.edu/event/pyrocumulonimbus-and-it
 s-role-in-the-climate-system-what-is-known-and-unknown
CATEGORIES:Colloquia / Seminar / Lecture
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