CTD DATA - EUREC4A_OA Atalante Cruise

The EUREC4A-OA oceanographic campaign that took place in January-February 2020 in the tropical North-West Atlantic Ocean aboard the research vessel L'Atalante was a contribution to the broader international research initiative EUREC4A (http://eurec4a.eu/). The cruise was carried out in conjunction with the research vessels Maria S. Merian and Meteor (Germany) and the Ron Brown (USA) as well as with the aircraft and UAV operations and continuous observations from the ground site on the island of Barbados (BCO) and the Saildrone© operations as part of the US ATOMIC project.

The overall objective of the EUREC4A-OA campaign was to collect observational data that will enable research on dynamic and thermodynamic processes in the atmosphere and the ocean, in order to better understand the role of fine ocean scales both in the internal dynamics of the ocean and in air-sea interactions.  To this end, measurements of oceanic and atmospheric profiles have been carried out to observe the temporal evolution and spatial heterogeneity of the atmospheric and oceanic boundary layers and the properties in these two fluids beyond these layers. Autonomous observation platforms (submarine glider, Argo profiling floats, surface buoys and the OCARINA and PICCOLO prototypes) complemented the observations carried out on board ships.


Chemical oceanography, Physical oceanography, Atmosphere


20N, 4S, -45E, -65W


For hydrology acquisition, we used the LOPS frame (28 bottles of 8 liters on two levels) with only 14 bottles on the high level, the bottles on the low level hadn’t caps. The frame is also equipped with a SBE911+ CTD, 2 LADCP, electronic reversing sensors and other sensors.The  CTD was controlled from the LOPS computer container.

The same Seabird 911+ CTD probe (s/n. 813) was used throughout the cruise. It was equipped with two sets of T, C, and O2 sensors. On the CTD frame were also mounted, 2 LADCP (RDI 300 kHz), 4 SIS reversing sensors (Pressure and Temperature), a Wet labs transmissometer, a Chelsea fluorometer, a Par & Spar and an IXSEA pinger.

The CTD sensors used are as follows:


                                                  Primary sensors                        Secondary sensors 

Temperature (SBE3+)                s/n 2911                                  s/n 4594

Conductivity (SBE4c)                s/n 3194                                  s/n 3166

Oxygen (SBE43)                        s/n 1402                                  s/n 526 



Electronics mounted on the LOPS frame:


            PASH 6000 Rosette, top          s/n 462            PASH 6000 Rosette, bottom     s/n 461

            IXSEA Pinger                          s/n 530            


            Downward-looking ADCP:      s/n 2002          RDI 300 kHz WorkHorse

            Upward-looking ADCP:           s/n 12492        RDI 300 kHz WorkHorse


            SIS sensors                             BT3                 BT5

            reversing pressure meter          s/n 6664          s/n 6665          RPM 6000 X

            reversing thermometer             s/n 1751          s/n 1752          RTM 4002 X


            Fluorometer Chelsea Aqua 3:   s/n 09-7117-003   Transmisso. Wet Labs C-Star    s/n 372DR

            Par Biospherical Licor Chelsea: s/n 70494       Spar Surface Irradiance: s/n 6301


The CTD data file contain the processed physical parameter collected by the CTD and dissolved oxygen.



CTD data file; variables per stations and pressure levels
19 MoNetCDFProcessed data
CTD data file; variables per stations and depth levels
18 MoNetCDFProcessed data
How to cite
Speich Sabrina, Carton Xavier, Reverdin Gilles, Branellec Pierre, Le Bihan Caroline, Laxenaire Remi, L'Hegaret Pierre, Leizour Stephane, Le Bot Philippe, Noisel Christophe, Manta Gaston, Meroni Agostino, Napoli Anna, Chen Yanxu, Masson Sébastien, Le Gal Alex, Olivier Léa (2021). CTD DATA - EUREC4A_OA Atalante Cruise. SEANOE. https://doi.org/10.17882/79096

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