The First Report of the Tropical Pacific Observing System 2020 project was published on 30 December 2016. This report contains initial recommendations for the Backbone and a synopsis of initial results and plans for the various initiatives of TPOS 2020. The Executive Summary and the full First Report can be downloaded from the tpos2020.org website or from the GOOS Report site. Further inquiries should be directed to This email address is being protected from spambots. You need JavaScript enabled to view it..TPOS2020