In the spirit of promoting cross-activity collaborations, APARC introduces a new joint QBOi-CCMI working group, QUOCA (QUasibiennial oscillation and Ozone Chemistry interactions in the Atmosphere), which is aimed at improving understanding of QBO-ozone feedbacks in present-day and future climates.

Through a community-approved experimental protocol, QUOCA will use chemistry climate models to examine the mechanisms controlling how changes in stratospheric ozone caused by QBO-driven changes in temperature and the circulation alter the heating rates and overall QBO structure. Broader questions related to the ozone feedback on the Brewer-Dobson circulation, QBO influences on trace gas distributions and the impact of an enhanced ozone QBO on teleconnections will also be explored.

QUOCA welcomes anyone who is interested in the coupling between ozone and the circulation to attend a virtual workshop held from November 18 to 21 introducing the activity and defining relevant working groups. Preliminary results from experiments will then be shared as part of a joint hybrid workshop with the QBOi and SNAPSI activities in Spring 2025 in Cambridge, UK.

If you are interested in hearing more about the project, please contact either Dr. Clara Orbe () or Dr. Alison Ming ().