QOS 2024

The Quadrennial Ozone Symposium Organizing Committee is pleased to announce that QOS 2024 will take place from 15–19 July 2024 in Boulder, Colorado, hosted by the University of Colorado Boulder with a hybrid virtual option.

We are excited to follow in the footsteps of a wonderful QOS 2021 graciously hosted online by Yonsei University, Korea.

The 2024 Quadrennial Ozone Symposium is the 36th meeting of Ozone Scientists that began with the “Conference on Ozone and Atmospheric Absorption” in Paris in May 1929. The previous meetings have been highlighted with our growing understanding of processes affecting atmospheric ozone, its observations, photochemistry, impacts on air quality and human health, as well as the existential threat of ozone layer depletion by chlorofluorocarbons and halons. This 36th symposium will highlight keynote and invited presentations on wildfire aerosol impacts on ozone, new findings of the Hunga eruption impact on the stratosphere, the anniversaries of the Aura satellite and IAGOS observations, increased awareness of ozone and stratospheric impacts on surface climate, and new satellite data from the Korean GEMS satellite and the NASA TEMPO instrument. Plan to submit your abstract before 1 March 2024!

LOC committee and Scientific Program Committee

Please read IO3C welcome message

For abstract submission go to Abstract Submission.

Please stay tuned for updates from the Organizing Committee on abstract submission, registration, venue, travel, and other information. We look forward to seeing everyone working on everything ozone science in Boulder and online in July 2024!

Headshot of Douglas Kinnison

Session A: Doug Kinnison (National Center for Atmospheric Research, USA)

“Polar ozone recovery: Challenges and Uncertainties in Model Projections”

Read More
Headshot of Luke Western

Session B: Luke Western (University of Bristol, UK)

"Why emissions of some ozone-depleting substances are still increasing"

Read More
Headshot of Helen Worden

Session C: Helen Worden (National Center for Atmospheric Research, USA)

"The Tropospheric Ozone Assessment Report (TOAR), Phase II"

Read More
Headshot of Marta Abalos

Session D: Marta Abalos ( Universidad Complutense de Madrid, Spain )

"Recent past and future trends in stratospheric ozone and circulation"

Read More
Headshot of Alberto Redonas

Session E: Alberto Redondas (AEMET- Meteorological State Agency, Spain)

"EUBREWNET (European Brewer Network): the growing pains of success"

Read More
Headshot of Alkis Bais

Session F: Alkis Bais (The Aristotle University of Thessaloniki, Greece)

Interactive changes of ozone, UV radiation, and climate in the 21st century and implications for the environment

Read More


  • November 2, 2023 request for IO3C award nominations
  • November 10, 2023 - Selection of session chairs (IO3C and LOC members)
  • January 8, 2024 - abstract submission is open
  • February 23, 2024 - open registration and request for ECS support
  • March 1, 2024 -  abstract submission is closed
  • Week of April 8-12, 2024 - selection of oral presentations and letters of acceptance
  • May 6, 2024 - IO3C award winners announced
  • June 1, 2024 - end of early registration
  • May 14, 2024 -  final session schedules
  • June 28, 2024  - end of  IO3C registration     
    On-site registration will be available the first day of the symposium

Questions?  Email QOS2024@colorado.edu