Moored current and temperature measurements in a submarine canyon of the Eastern Ligurian Sea, November 2020-October 2022
This data set includes n.5 files containing observational data of a stand-alone mooring, at about 600 m depth along the Levante Canyon of the Eastern Ligurian Sea (44°05.443’N, 9°29.900’E, western Mediterranean). The time series covers the period from November 2020 to October 2022. The dataset includes measurements conducted with two current meters (ADCP RDI QuarterMaster and Nortek Continental) and three CTD probes (SBE37), and provides information about the hydrodynamics and thermohaline properties across almost the entire water column. The mooring is configured and maintained for continuous long-term monitoring being in a particular deep-sea area (about 600 m water depth), that acts as a hot-spot of biodiversity, hosting valuable and vulnerable ecosystems, such as the deep-living cold-water corals. Data are described in the data paper Ciuffardi et al.: Deep water hydrodynamic observations around a Cold-Water Coral habitat in a submarine canyon in the Eastern Ligurian Sea (Mediterranean Sea), Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2022-466, in review, 2023
Levante Canyon, Western Mediterranean Sea, Mooring observatory, Currents, Salinity, Temperature
44.090717N, 44.090717S, 9.498333E, 9.498333W
The upward-looking ADCP used is an RDI QuarterMaster (Teledyne RD Instruments USA, Poway, California), using a four-beam, convex configuration with a beam angle of 20° and a working frequency of 153.6 kHz. The instrument is moored at a mean nominal depth of 325 m with a number of depth cells set to 44 and a cell size of 8 m. The temperature sensor has the following characteristics: range -5° to 45°C, precision ±0.4°C, resolution 0.01°C.
The downward-looking ADCP used is a Nortek Continental (Nortek AS, Norway), using a three-beam, convex configuration with a beam angle of 25° and a working frequency of 190 kHz. The instrument is moored at a mean nominal depth of 420 m with a number of depth cells set to 30 and a cell size of 8 m. The temperature sensor has the following characteristics: range -4° to 40°C, precision 0.1°C, resolution 0.01°C.
Velocity accuracy is ±1 %, ±0.5 cm/s and the sampling interval is 1h for both the RDI and the Nortek. The sound speed is computed by the pressure and temperature sensors embedded at the transducer head joint to the assumed salinity.
The three SBE37 CTDs deployed have the following characteristics for conductivity and temperature sensors respectively: range 0 to 70 mS/cm and -5 to 35 °C, accuracy 0.003 mS/cm and 0.002 °C, resolution 0.0001 mS/cm and 0.0001 °C. The probes are also equipped with a Strain-gauge pressure sensor with an accuracy of ± 0.1% of full-scale range.