Bio-Optical Sensors on Argo Floats.

Abstract

Biogeochemical processes at the ocean surface have begun to be documented on unprecedented spatial and temporal scales thanks to the advent of satellite ocean-colour radiometry (OCR). These observation techniques have inherent limitations, so in situ data are required to validate the algorithms and to extend the surface properties to the deeper layers. The profiling floats of the Argo array represent a promising technology for future observations in ocean biogeochemistry and bio-optics. Future global observational strategies will rely on bio-optical floats and on their synergetic and integrated use with ocean-colour radiometry (OCR). This report provides recommendations and establishes a framework for the future development of a cost-effective, bio-optical float network corresponding to the needs and expectations of the scientific community. Recommendations range from the identification of key bio-optical measurements to be implemented on floats to the real-time management of the data flux resulting from the deployment of a "fleet of floats".