[A-CG47] Status and future view on global ocean observation: toward achievement and development for OneArgo

[ACG47-04] Toward the realization of OneArgo

*Toshio Suga^1,2 (1.Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), Tohoku University & Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2.Graduate School of Science, Tohoku University)

Keywords:Argo, BGC Argo, Deep Argo, OneArgo

OneArgo is a major expansion of the Argo Program, providing two decades of transformative physical data for the upper two kilometers of the global ocean. The present Argo array will be expanded in three ways: Global Core: the existing upper ocean measurements will be extended to high latitudes and marginal seas with enhanced coverage in the tropics and western boundaries of the major ocean basins, Deep: Deep ocean measurements will be obtained for the 50% of the global oceans that are below 2000 m depth, and BGC: dissolved oxygen, pH, nitrate, chlorophyll, optical backscatter, and irradiance data will be collected to investigate the biogeochemical variability of the upper ocean and the processes by which these cycles respond to a changing climate. The technology and infrastructure necessary for this expansion are now being developed through large-scale regional pilots to refine the floats and sensors further and demonstrate the utility of these measurements. Further innovation is expected to improve the performance of the floats and sensors and to develop the analyses necessary to provide research-quality data. The International Argo Program has registered OneArgo as a UN Ocean Decade project and aims to have a fully global OneArgo operational by around 2030, which is a major challenge. This talk reports on the current status and prospects of the project.