Zilberman N. V. auteur aut IRD Thierry V. auteur aut IRD King B. auteur aut IRD Alford M. auteur aut IRD André X. auteur aut IRD Balem K. auteur aut IRD Briggs N. auteur aut IRD Chen Z. H. auteur aut IRD Cabanes C. auteur aut IRD Coppola L. auteur aut IRD Dall'Olmo G. auteur aut IRD Desbruyéres D. auteur aut IRD Fernandez D. auteur aut IRD Foppert A. auteur aut IRD Gardner W. auteur aut IRD Gasparin Florent auteur aut IRD Hally B. auteur aut IRD Hosoda S. auteur aut IRD Johnson G. C. auteur aut IRD Kobayashi T. auteur aut IRD Le Boyer A. auteur aut IRD Llovel W. auteur aut IRD Oke P. auteur aut IRD Purkey S. auteur aut IRD Remy E. auteur aut IRD Roemmich D. auteur aut IRD Scanderbeg M. auteur aut IRD Sutton P. auteur aut IRD Walicka K. auteur aut IRD Wallace L. auteur aut IRD van Wijk E. M. auteur aut IRD text journalArticle eng text/pdf reformatted digital access The ocean is the main heat reservoir in Earth's climate system, absorbing most of the top-of-the-atmosphere excess radiation. As the climate warms, anomalously warm and fresh ocean waters in the densest layers formed near Antarctica spread northward through the abyssal ocean, while successions of warming and cooling events are seen in the deep-ocean layers formed near Greenland. The abyssal warming and freshening expands the ocean volume and raises sea level. While temperature and salinity characteristics and large-scale circulation of upper 2000 m ocean waters are well monitored, the present ocean observing network is limited by sparse sampling of the deep ocean below 2000 m. Recently developed autonomous robotic platforms, Deep Argo floats, collect profiles from the surface to the seafloor. These instruments supplement satellite, Core Argo float, and ship-based observations to measure heat and freshwater content in the full ocean volume and close the sea level budget. Here, the value of Deep Argo and planned strategy to implement the global array are described. Additional objectives of Deep Argo may include dissolved oxygen measurements, and testing of ocean mixing and optical scattering sensors. The development of an emerging ocean bathymetry dataset using Deep Argo measurements is also described. specialized deep ocean ocean observation ocean heat content (OHC) sea level (SL) ocean deoxygenation bathymetry accuracy ocean mixing sediment transport MONDE 032 020 126 10 1287867 [12 ] 2023 https://www.documentation.ird.fr/hor/fdi:010088795 10.3389/fmars.2023.1287867 [F B010088795] https://www.documentation.ird.fr/hor/fdi:010088795 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2024-01/010088795.pdf IRD - Base Horizon / Pleins textes 2024-01-12 2025-02-24 fdi:010088795 fre