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Argos-3 Satellite Communication System: Implementation on the Arvor Oceanographic Profiling Floats ArchiMer
Andre, Xavier; Moreau, Bertrand; Le Reste, Serge.
The scientific community observes the ocean for applications in the fields of oceanography and climate research. In order to recover in situ data, more than 3,000 profiling floats are operated in the framework of the Argo Program. Each float performs cycles between the sea surface and a depth of 2,000 meters. Scientific data are gathered while the float is travelling upward from the depths of the oceans, and are then transmitted via a satellite communication system at the end of each cycle. During its time at the surface, mainly dedicated to transmissions, the float is vulnerable and subject to drift, which limits its use in many studies. Moreover, transmission times are becoming longer due to a trend towards high resolution or multi-sensor profiles....
Tipo: Text Palavras-chave: Buoy observations; In situ oceanic observations; Instrumentation; Sensors; Profilers; Oceanic.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00284/39519/38011.pdf
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The vertical structure of open-ocean submesoscale variability during a full seasonal cycle ArchiMer
Erickson, Zachary K; Thompson, Andrew F; Callies, Jörn; Yu, Xiaolong; Naveira Garabato, Alberto; Klein, Patrice.
Submesoscale dynamics are typically intensified at boundaries and assumed to weaken below the mixed layer in the open ocean. Here, we assess both the seasonality and the vertical distribution of submesoscale motions in an open ocean region of the northeast Atlantic. Second-order structure functions, or variance in properties separated by distance, are calculated from submesoscale-resolving ocean glider and mooring observations, as well as a 1/48° numerical ocean model. This data set combines a temporal coverage that extends through a full seasonal cycle, a horizontal resolution that captures spatial scales as small as 1 km, and vertical sampling that provides near-continuous coverage over the upper 1000 m. While kinetic and potential energies undergo a...
Tipo: Text Palavras-chave: Instability; Mixing; Small scale processes; Buoy observations; Profilers; Oceanic.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00592/70388/68470.pdf
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Accuracy and long-term stability assessment of inductive conductivity cell measurements on Argo floats ArchiMer
Nezlin, Nikolay P.; Dever, Mathieu; Halverson, Mark; Leconte, Jean-michel; Maze, Guillaume; Richards, Clark; Shkvorets, Igor; Zhang, Rui; Johnson, Greg.
This study demonstrates the long-term stability of salinity measurements from Argo floats equipped with inductive conductivity cells, which have extended float lifetimes as compared to electrode-type cells. New Argo float sensor payloads must meet the demands of the Argo governance committees before they are implemented globally. Currently, the use of CTDs with inductive cells designed and manufactured by RBR Ltd., has been approved as a Global Argo Pilot. One requirement for new sensors is to demonstrate stable measurements over the lifetime of a float. To demonstrate this, data from four Argo floats in the western Pacific Ocean equipped with the RBRargo CTD sensor package are analyzed using the same Owens-Wong-Cabanes (OWC) method and reference datasets...
Tipo: Text Palavras-chave: Pacific Ocean; Salinity; Instrumentation/sensors; Profilers; Oceanic; Quality assurance/control.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76568/77698.pdf
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A Correction for the Thermal Mass-Induced Errors of CTD Tags Mounted on Marine Mammals ArchiMer
Mensah, Vigan; Roquet, Fabien; Siegelman-charbit, Lia; Picard, Baptiste; Pauthenet, Etienne; Guinet, Christophe.
The effect of thermal mass on the salinity estimate from conductivity-temperature-depth (CTD) tags sensor mounted on marine mammals is documented, and a correction scheme is proposed to mitigate its impact. The algorithm developed here allows for a direct correction of the salinity data, rather than a correction of the sample's conductivity and temperature. The amplitude of the thermal mass-induced error on salinity and its correction are evaluated via comparison between data from CTD tags and from Sea-Bird Scientific CTD used as a reference. Thermal mass error on salinity appears to be generally O(10(-2)) g kg(-1), it may reach O(10(-1)) g kg(-1), and it tends to increase together with the magnitude of the cumulated temperature gradient (T-HP) within the...
Tipo: Text Palavras-chave: Data processing; In situ oceanic observations; Instrumentation; Sensors; Profilers; Oceanic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00585/69697/67577.pdf
Registros recuperados: 4
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