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SUMMARY:Emerging importance of chemistry-climate coupling on weather to cl
 imate timescales - Prof Michaela I. Hegglin\, Director at the Institute of
  Climate and Energy Systems of the Forschungszentrum Jülich (Germany)
DTSTART:20251021T100000Z
DTEND:20251021T110000Z
UID:TALK237886@talks.cam.ac.uk
CONTACT:Yao Ge
DESCRIPTION:Abstract: \n\nTwo-way feedbacks between atmospheric compositio
 n changes and climate dynamics have gained increasing attention due to its
  critical role in weather and climate prediction. In this talk\, I will pr
 ovide a broad overview of the field’s development and highlight where ch
 emistry-climate interactions are considered most significant. I will prese
 nt a range of examples based on advanced modeling and newly developed obse
 rvational climate data records to illustrate chemistry–climate coupling 
 across timescales from S2S weather patterns to long-term climate trends. T
 hese include the influence of dynamical processes and abrupt events—such
  as sudden stratospheric warmings and the Hunga Tonga eruption—on strato
 spheric composition anomalies and their feedbacks on meteorological and cl
 imate phenomena. I will also discuss the impacts of stratospheric ozone de
 pletion and recovery on climate radiative forcing and atmosphere–ocean d
 ynamics. Finally\, I will present a storyline approach to future air pollu
 tion and how air pollution impacted methane (and thus climate) over the re
 cent past. Collectively\, these findings emphasize the critical feedback l
 oops between atmospheric composition and climate dynamics via radiative pr
 ocesses and underscore the need for realistic representation of compositio
 n anomalies in weather forecasting systems and climate models.\n \n\nShort
  bio:\n\nProf. Dr Michaela I. Hegglin holds an MSc in Environmental Scienc
 e (2000) and a PhD in Atmospheric Science (2004) from ETH Zurich in Switze
 rland. After seven years at the University of Toronto as Postdoc and Resea
 rch Associate she moved in 2012 to the Meteorology Department at the Unive
 rsity of Reading where she progressed through the ranks and was promoted t
 o Full Professor in 2022. Since March 2022 she took on the position as Dir
 ector of the Institute of Climate and Energy Systems – Stratosphere (ICE
 -4) at the Research Centre Julich\, Germany\, and holds a Full Professorsh
 ip at the University of Wuppertal. \n\n \n\nMichaela’s main expertise li
 es in Earth observations\, atmospheric chemistry and transport\, upper tro
 posphere and lower stratosphere processes\, stratospheric ozone\, air poll
 ution\, chemistry-climate coupling\, and Earth-system model evaluation. Sh
 e has occupied numerous leadership roles within Future Earth\, the World C
 limate Research Programme\, and the World Meteorological Organisation/Unit
 ed Nations Environment Programme (WMO/UNEP) Scientific Assessments of Ozon
 e Depletion\, and is currently Principal Investigator of the European Spac
 e Agency’s Water Vapour Climate Change Initiative.
LOCATION:Chemistry Dept\, Unilever Lecture Theatre and Teams
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