Hydrodynamic dataset from the UPCAST and CASSISED campaigns in the Cassidaigne canyon (NW Mediterranean Sea)

Date 2023-01-19
Temporal extent 2017-08-17 -2019-11-18
Author(s) Brun Lenaig1, Pairaud IvaneORCID1, Silva Jacinto RicardoORCID2, Garreau PierreORCID1, Dennielou BernardORCID2
Affiliation(s) 1 : IFREMER, University of Brest, UMR 6523 CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, Plouzané, France
2 : IFREMER, Geo-Ocean, University of Brest, CNRS, UMR 6538, F-29280, Plouzané, France
DOI 10.17882/92820
Publisher SEANOE
Note Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of the data. Data are intended to be research-quality but it is possible that the data contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use. Authors welcome users to ask questions and report problems. Any presentation or publication using the data should be sent to the data producers (ivane.pairaud@ifremer.fr and ricardo.silva.jacinto@ifremer.fr) at the time of submission. The integration of data authors may range from acknowledgement in the case of a simple reference to the data, to association as a co-author in the case of added value induced by the interpretation of the basic data. The origin of the data must be explicitly mentioned in the publications using them.
Keyword(s) Current, Temperature, NW Mediterranean Sea, ADCP, Cassidaigne, submarine canyon, Turbidity Current, Mastodon-2D, Turbidimeter
Abstract

In the Gulf of Lions, Northwestern Mediterranean Sea, the Cassidaigne submarine canyon is located in an active circulation area. Water movements are modulated both by westerly and easterly winds and by the Northern Current's mesoscale structures. The Cassidaigne canyon interacts with the general circulation inducing locally complex hydrodynamic processes. In 2017 and 2019, two oceanographic cruises were carried out in the Cassidaigne canyon area to gather current and temperature data. 2 ADCPs were moored on the shelf at 100 m depth around the canyon head, and 3 ADCPs were moored along the canyon axis from its head at 400 m depth to the base of the continental slope at 1900 m depth. STBD turbidimeters were moored in the canyon head and gorge to quantify sediment transport in the canyon. In addition, three Mastodon-2d thermistor lines were moored around the canyon head. Current measurements revealed a local circulation modulated by the morphology of the canyon depending on the stratification. Cross-canyon currents were recorded during Northern Current intrusion events. Temperature measurements revealed the generation of upwelling events under strong westerly winds. Near the bottom, these in-situ measurements revealed turbidity currents related to the canyon internal hydrodynamics.

 

Licence CC-BY-NC-ND
Acknowledgements The authors acknowledge the technical team of the French Oceanographic Fleet (FOF) and the crews of the R/V THETYS II and R/V L’EUROPE for their contribution to the field experiments. The authors also thank Valérie Garnier, Christophe Ravel, Deny Malengros and Christel Pinazo for their help during the UPCAST campaign and Ronan Apprioual, Mikaël Roudaut and Jérémie Gouriou for the mooring deployments during the CASSISED cruise.
Sensor metadata

ADCP and Mastodon-2d from UPCAST :
- Pressure and temperature from Mastodon-2d lines (Mastodon-2d B', C and D; 10 sensors; 0.1°C of precision; Lazure Pascal, Le Berre David, Gautier Laurent (2015). Mastodon Mooring System To Measure Seabed Temperature Data Logger With Ballast, Release Device at European Continental Shelf . Sea Technology , 56(10), 19-21)
- Temperature, current velocities and echo intensity from Teledyne-RDI ADCP 300 kHz (ADCP B; at 125 m depth; 10-minute sampling period)

ADCPs and STBD turbidimeters from CASSISED :
- Temperature, currents velocities and echo intensity from Teledyne-RDI ADCPs (Shelf ADCP at 86 m depth, 300 kHz and 15-minute sampling period; ADCP PeerGynt1 at 322 m depth, 300 kHz and 10-minute sampling period; ADCP PeerGynt2 at 1528 m depth, 300 kHz and 10-minute sampling period; ADCP Aniitra at 1606 m depth, 75 kHz and 10-minute sampling period)
- Turbidity from STBD turbidimeters on the lines PeerGynt1 and PeerGynt2 30 m above the seabed.

Data
File Size Format Processing Access
ADCP B (UPCAST cruise; N43°06.2220 and E5°26.8620) 3 MB RDI binary ADCP format Raw data Open access
Shelf ADCP (CASSISED cruise; N43°08.7780 and E5°32.2440) 15 MB RDI binary ADCP format Raw data Open access
ADCP PeerGynt1 (CASSISED cruise; N43°08.2367 and E5°30.7570) 16 MB RDI binary ADCP format Raw data Open access
ADCP PeerGynt2 (CASSISED cruise; N43°01.3409 and E5°25.3316) 16 MB RDI binary ADCP format Raw data Open access
ADCP Aniitra (CASSISED cruise; N42°56.1653 and E5°25.5704) 41 MB RDI binary ADCP format Raw data Open access
Mastodon B' (UPCAST cruise; N43°06.2096 and E5°26.8616) 3 MB CSV Raw data Open access
Mastodon C (UPCAST cruise; N43°08.453 and E5°27.140) 3 MB CSV Raw data Open access
Mastodon D (UPCAST cruise; N43°07.3953 and E5°30.3355) 3 MB CSV Raw data Open access
STBD turbidimeter on PeerGynt1 (CASSISED cruise; N43°08.2367 and E5°30.7570) 989 KB TEXTE Raw data Open access
STBD turbidimeter on PeerGynt2 (CASSISED cruise; N43°01.3409 and E5°25.3316) 980 KB TEXTE Raw data Open access
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How to cite 

Brun Lenaig, Pairaud Ivane, Silva Jacinto Ricardo, Garreau Pierre, Dennielou Bernard (2023). Hydrodynamic dataset from the UPCAST and CASSISED campaigns in the Cassidaigne canyon (NW Mediterranean Sea). SEANOE. https://doi.org/10.17882/92820