The task team on the evolution of the regional/global task (R/G TS TT) sharing has produced the present report “GHRSST R/G TS System Architecture (GSA)” which describes the agreed new framework for the GHRSST R/G TS. The report describes the data management and distribution services and specifies the services that are required to implement it. The new R/G TS was reviewed and approved at GHRSST XXI, 2020. Resources: About the TASK TEAM ON EVOLUTION OF THE REGIONAL/GLOBAL TASK SHARING: https://www.ghrsst.org/about-ghrsst/task-teams/evolution-of-the-regionalglobal-task-sharing-task-team/ Proceedings of the GHRSST Science Team Meeting 2020: https://zenodo.org/record/4626734

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