Preparing the New Phase of Argo: Technological Developments on Profiling Floats in the NAOS Project

Type Article
Date 2020-11
Language English
Author(s) André XavierORCID1, Le Traon Pierre-Yves2, 3, Le Reste Serge1, Dutreuil Vincent1, 4, Leymarie Edouard5, Malardé Damien6, Marec Claudie7, 8, 9, Sagot Jérôme6, Amice Martin1, Babin Marcel7, Claustre Hervé5, David Arnaud6, D’ortenzio Fabrizio5, Kolodziejczyk NicolasORCID13, Lagunas José Luis7, 11, Le Menn Marc12, Moreau Bertrand1, Nogré David6, Penkerc’h Christophe5, Poteau Antoine5, Renaut Corentin1, Schaeffer Christophe6, Taillandier Vincent5, Thierry VirginieORCID10
Affiliation(s) 1 : Ifremer, RDT, Plouzané, France
2 : Ifremer, ODE, Plouzané, France
3 : Mercator Ocean International, Ramonville-Saint-Agne, France
4 : Laboratoire Interdisciplinaire des Environnements Continentaux, CNRS, Université de Lorraine, Metz, France
5 : Laboratoire d’Océanographie de Villefranche, CNRS, Sorbonne Université, Villefranche-sur-Mer, France
6 : NKE Instrumentation, Hennebont, France
7 : Takuvik Joint International Laboratory, Laval University, Quebec City, QC, Canada
8 : CNRS (France), Département de Biologie et Québec-Océan, Université Laval, Quebec City, QC, Canada
9 : IUEM-UMS 3113, Université de Bretagne Occidentale, Plouzané, France
10 : CNRS, Ifremer, IRD, Laboratoire d’Océanographie Physique et Spatiale, Univ Brest, Plouzané, France
11 : Recherche et développement pour la défense Canada – Centre de recherches de l’Atlantique, Dartmouth, NS, Canada
12 : Service Hydrographique et Océanographique de la Marine, Brest, France
13 : CNRS, Ifremer, IRD, Laboratoire d’Océanographie Physique et Spatiale, Univ Brest, Plouzané, France
Source Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2020-11 , Vol. 7 , P. 577446 (22p.)
DOI 10.3389/fmars.2020.577446
WOS© Times Cited 1
Keyword(s) ocean, Argo, global observing system, profiling float, deep, biogeochemistry, under-ice, float technology
Abstract

The international array of profiling floats known as Argo is a major component of the global ocean- and climate-observing system. In 2010, the NAOS (Novel Argo Observing System) project was selected as part of France’s Equipex “Investissement d’Avenir” program. The objectives of NAOS were to consolidate the French contribution to the Argo core mission (global temperature and salinity measurements down to 2,000 m) as well as to develop the future generation of French Argo profiling floats and prepare the next phase of the Argo program with an extension to the deep ocean (Deep-Argo), biogeochemistry (BGC-Argo) and polar seas. This paper summarizes the main technological advances and at-sea validations carried out as part of NAOS: development of a deep (4,000 m) float, a new BGC float for Research & Development (R&D) applications, and a BGC float for deployments in Arctic areas, assessment of a new density and Absolute Salinity optical sensor, improvement of the reliability of the standard Argo float, and upgraded satellite-transmission performance. French profiling floats developed in this way are now operational and among the most deployed worldwide, and the density sensor is the most promising of its kind for profiling floats applications.

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André Xavier, Le Traon Pierre-Yves, Le Reste Serge, Dutreuil Vincent, Leymarie Edouard, Malardé Damien, Marec Claudie, Sagot Jérôme, Amice Martin, Babin Marcel, Claustre Hervé, David Arnaud, D’ortenzio Fabrizio, Kolodziejczyk Nicolas, Lagunas José Luis, Le Menn Marc, Moreau Bertrand, Nogré David, Penkerc’h Christophe, Poteau Antoine, Renaut Corentin, Schaeffer Christophe, Taillandier Vincent, Thierry Virginie (2020). Preparing the New Phase of Argo: Technological Developments on Profiling Floats in the NAOS Project. Frontiers In Marine Science, 7, 577446 (22p.). Publisher's official version : https://doi.org/10.3389/fmars.2020.577446 , Open Access version : https://archimer.ifremer.fr/doc/00658/77029/