CTD DATA - EUREC4A_OA Atalante Cruise
|Temporal extent||2020-01-19 -2020-02-19|
|Author(s)||Speich Sabrina1, Carton Xavier2, Reverdin Gilles3, Branellec Pierre2, Le Bihan Caroline2, Laxenaire Remi6, L'Hegaret Pierre1, 2, Leizour Stephane2, Le Bot Philippe2, Noisel Christophe3, Manta Gaston1, Meroni Agostino4, Napoli Anna5, Chen Yanxu1, Masson Sébastien, Le Gal Alex2, Olivier Léa3|
|Affiliation(s)||1 : LMD, IPSL, ENS-PSL, CNRS, Ecole Polytechnique, Ecole des Ponts, Paris, France
2 : LOPS, UBO-IUEM, Ifremer, CNRS, IRD, Brest, France
3 : LOCEAN, IPSL, CNRS, SU, IRD, MNHN
4 : CIMA Foundation, Italy
5 : UNIMIB, Italy
6 : COAPS, FSU, FL, USA
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.
|Acknowledgements||We thank captain Philippe Robbe, his officers and the crew of RV L’Atalante for their support of our observational program and the hospitality and friendliness on board. We also thank the crew on deck, in the engine rooms and the galley for providing and supporting an excellent working environment. The ship time was provided by the French Research Oceanographic Fleet (FOF). The cruise very much benefited from multiple financial contributions provided by the research institutions involved. Namely, This work has been funded by the FOF, the French National LEFE/IMAGO-GMMC EUREC4A-OA project, from Ifremer, from CNRS-INSU, from the JPI-Ocean EUREC4A-OA project, from the TOSCA SMOS-Ocean project supported by the French Spatial Agency CNES (Centre National d’Etudes Spatiales), from the H2020 TRIATLAS project and from the Department of Geosciences at ENS via the Chaire Chanel. Support for the salinity drifters was provided by the Climate Variability and Predictability Program of NOAA's Climate Program Office. NOAA/AOML's Physical Oceanography Division. We benefited from numerous data sets made freely available and listed here : the ADT, SLA and currents maps produced by Ssalto/Duacs distributed by the CMEMS (https://resources.marine.copernicus.eu), the Chla and SST maps produced by CLS, the MUR SST produced by JPL, the SMOS L2Q maps produced by CATDS (CATDS, 2019), the SMAP maps produced by Remote Sensing System and CCI+SSS maps produced in the frame of ESA CCI+SSS project. We also acknowledge support from MeteoFrance, MercatorOcean (France) and FSU (FL, USA) who provided us with daily atmosphere and ocean forecasts. Finally, we acknowledge support from AERIS and IPSL for providing assistance and services by ensuring a smooth daily data flow to and from the ship.|
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.