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

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.

 

Disciplines

Marine geology, Physical oceanography

Keywords

Current, Temperature, NW Mediterranean Sea, ADCP, Cassidaigne, submarine canyon, Turbidity Current, Mastodon-2D, Turbidimeter

Devices

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

FileSizeFormatProcessingAccess
ADCP B (UPCAST cruise; N43°06.2220 and E5°26.8620)
3 MoRDI binary ADCP formatRaw data
Shelf ADCP (CASSISED cruise; N43°08.7780 and E5°32.2440)
15 MoRDI binary ADCP formatRaw data
ADCP PeerGynt1 (CASSISED cruise; N43°08.2367 and E5°30.7570)
16 MoRDI binary ADCP formatRaw data
ADCP PeerGynt2 (CASSISED cruise; N43°01.3409 and E5°25.3316)
16 MoRDI binary ADCP formatRaw data
ADCP Aniitra (CASSISED cruise; N42°56.1653 and E5°25.5704)
41 MoRDI binary ADCP formatRaw data
Mastodon B' (UPCAST cruise; N43°06.2096 and E5°26.8616)
3 MoCSVRaw data
Mastodon C (UPCAST cruise; N43°08.453 and E5°27.140)
3 MoCSVRaw data
Mastodon D (UPCAST cruise; N43°07.3953 and E5°30.3355)
3 MoCSVRaw data
STBD turbidimeter on PeerGynt1 (CASSISED cruise; N43°08.2367 and E5°30.7570)
989 KoTEXTRaw data
STBD turbidimeter on PeerGynt2 (CASSISED cruise; N43°01.3409 and E5°25.3316)
980 KoTEXTRaw data
ADCP B (UPCAST cruise; N43°06.2220 and E5°26.8620)
3 MoNetCDFQuality controlled data
ADCP PeerGynt1 (CASSISED cruise; N43°08.2367 and E5°30.7570)
23 MoNetCDFQuality controlled data
ADCP PeerGynt2 (CASSISED cruise; N43°01.3409 and E5°25.3316)
23 MoNetCDFQuality controlled data
ADCP Aniitra (CASSISED cruise; N42°56.1653 and E5°25.5704)
68 MoNetCDFQuality controlled data
Shelf ADCP (CASSISED cruise; N43°08.7780 and E5°32.2440)
22 MoNetCDFQuality controlled data
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

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