­Please join the Global Ocean Oxygen Network (IOC Expert Working Group GO2NE) for a new session of its webinar series on ocean deoxygenation. This 9th webinar will take place on 23 September 2021 at 14:00 UTC. The webinar will feature presentations by: Dante Espinoza-Morriberon (Instituto del Mar del Perú) on "Numerical modelling of oxygen variability and deoxygenation trends in the Southeastern Pacific," and Renato Salvatteci (Kiel University, Germany) on "Paleoceanographic evidence for smaller fish species in a warm and oxygen-poor ocean." Recordings from this and past webinars are available from here: https://www.youtube.com/results?search_query=unesco+go2ne