We would like to let you know that the 5th International Symposium on the Ocean in a High CO2 World has been officially rescheduled for 13-16 September 2022 in Lima, Peru. This will officially be held as a hybrid event to increase global participation. The new format, registration costs, and registration details are reflected on the High-CO2 website. Previously submitted abstracts are still valid. The deadline for any new submissions or alterations, and the deadline to submit applications for travel support, is currently 24 April 2022. To submit your abstract electronically, or to withdraw your abstract or update your contact information, you should email This email address is being protected from spambots. You need JavaScript enabled to view it.. For more information visit the symposium’s abstract submission page.