Deep Argo status: Transition from regional to global, data access, and a new application to measure ocean bathymetry

– Nathalie Zilberman, Associate Researcher à Scripps Institution of Oceanography –

Résumé :

Deep Argo, the deep-ocean component of the OneArgo program, aims to deliver sustained, full-depth measurements of key ocean variables, such as ocean temperature, salinity, and currents critical to the Global Ocean Observing System. The capacity of Deep Argo floats to sample autonomously the deepest regions of the ocean every 10 days enables an unprecedented characterization of ocean variability. Measurements collected over the last decade have demonstrated Deep Argo’s capability to estimate trends in deep-ocean properties more accurately than from repeat hydrography alone, and with greater temporal and spatial resolution. Enhanced deep-ocean sampling is critical to improve the representation of deep-ocean processes and water mass properties in data assimilative models, validate coupled ocean-atmosphere model and ocean reanalysis, increase consistency of assimilated in situ and satellite observations, and reduce biases in upper-ocean decadal predictions. I will present updates on the status and evolution of the Deep Argo array, data access, scientific breakthroughs using Deep Argo data, and a new application to measure ocean bathymetry.