Instrumentation for core dataset

Campbell Meteostation

The Campbell Meteostation is composed of a CR1000 measurement and module control for data transfer. The following sensors are mounted on a tripod, fixed on a mast at 5 m above the water:

                      • Wind monitor to measure wind speed and direction
                      • Apogee PYR-P Pyranometer to acquire solar radiations
                      • Rotronic HygroCL1P2 Temp and relative Humidity Probe to measure air temperature and relative humidity
                      • Barometric Sensor 600 to 1100 mB to measure atmospheric pressure
                      • Raingauge to measure rainfall

You can check the data in Datalakes or see them in real time.

RBR temperature chain

The first chain has a 20 m length with 24 RBR temperature sensors. A sensor is fixed at a depth of 0.25m, 0.5m, 1m, 1.5m, 2m, 2.5m, 3 m and then every meter down to a depth of 18 m.

The second chain has a 70 m length with 24 RBR temperature sensors. A sensor is fixed every 3 m from a depth of 21 m to 90 m.

The data is connected in real time to Datalakes.

 

ADCP - current velocity

The Acoustic Doppler Current Profiler is a Workhorse Sentinel from Teledyne RD instruments. This upward-looking ADCP is installed in the water near the plaform and records the current velocities in the first 8 m of the surface layer. A second downward-looking ADCP records current velocities in the deep water.

These ADCP are directly connected to the data system and can be consulted liv on Datalakes. You have access to: the flow magnitude and direction upward an downward, the near surface velocities and the deep velocities, as well as the calculated heat fluxes.

 

Idronaut profiler

The Idronaut profiling system is installed in the cabin near the internal moonpool. It automatically takes vertical profiles down to a depth of 60m, every 3 hours throughout the day.  He is composed of a OCEAN SEVEN 16Plus CTD probe, that includes temperature, conductivity, pressure, optical oxygen, pH and redox sensors. In adition, there is a Chelsea Trilux Fluorometer, that measures Chla, Turbitidy and Phycocyanin, and a LI-193SA spherical quantum sensor to measure Photosynthetically Active Radiation (PAR).

PP and OxyPar Moorings

From October 2018 until March 2021, the PP mooring was managed by the two projects Primary Production and CARBOGEN. Every ~6 weeks, the sensors were removed, cleaned, quality checked and then redeploy. The following sensors were deployed within the surface layer down to 30m:

 

Since March 2021, the CARRTEL team is managing the OxyPar Mooring with two sets of oxygen and PAR sensors. Every 6 weeks, the set of sensors are directly exchanged on site. Back in the laboratory, the exposed sensors are quality-checked against a reference sensor and prepared for the next deployment. Within each sets, the following sensors were deployed:

                    • 4 PAR sensors (RBR solo PAR) at 0m, 5m, 10m and 20m
                    • 5 oxygen sensors : RBR ODO with wipers at 0m, Minidot with wipers at 5m, 10m and 15m, and Minidot without wipers at 30 m
Autonomous Moored Profiler Thetis

Thetis is an Autonomous Moored Profiling Platform developed by Wetlabs.This high-tech instrument gives complete bio-optical water properties, and will be used as calibration for remote sensing. It is installed in the protection perimeter and takes vertical profiles from a depth of 50m to 0.5m at different frequencies (every three hours to twice a day). Be aware that there are gaps in time due to technical issues and maintenances.

Data is transmitted in real time via GSM, when Thetis is at the surface, and automatically uploaded onto Datalakes. Vertical profiles of oxygen and from the CTD, as well as the calculated depth time grid of oxygen and CTD are available within the core data.

The set of modular sensors installed are:

    • Sea-Bird 49 FastCAT CTD
    • DO optode
    • pH
    • 2 x ECO BBFL2w Triplet-w fluorometers, CHL-a and CDOM fluorescence
    • 4 backscatter (440, 532, 630, 700 nm)
    • Sea-Bird ECO PAR (400 – 700 nm)
    • AC-S spectrophotometer (80 wavelengths: 400 – 730 nm) for absorption and attenuation
    • 2 Satlantic HOCR hyperspectral radiometers for up- and downwelling irradiance (136 wl)

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