Please join us for the quarterly GO-BGC webinar, hosted by the US Ocean Carbon and Biogeochemistry program. This webinar will be focused on investigations of phytoplankton phenology and variability at regional to global scales using a range of chemical and bio-optical sensors on the BGC-Argo floats. We will hear 3 short presentations about exciting new work in this area, followed by a community discussion about best practices, challenges, and future perspectives of using BGC-Argo data to advance our understanding of ecological dynamics and the footprint of progressive climate change on the ocean. Recordings will be available on the OCB and GO-BGC website.