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 3 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
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 will be soon connected, so that they can be acquire in near-real time.

 

ADCP - current velocity

The Acoustic Doppler Current Profiler is a Workhorse Sentinel from Teledyne RD instruments. It is installed in the water near the plaform and records the current velocities in the first 8 m of the surface layer.

At the moment, the ADCP is not directly connected to the data system and data have to be retrieved manually after a few months. In the future, we hope to connect it so that data can be accessible in near real-time

 

Idronaut profiler

The Idronaut profiling system is currently in test phase. He is installed in the cabin near the internal moonpool. It will take vertical profiles down to a depth of 50 or 60m, automatically regularly during 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).

Permanent Mooring

Since October 2018, a mooring is installed during 6 weeks, then all the sensors are removed, cleaned, calibrated and then redeploy. On the mooring line, the following sensors are installed:

                    • 12 temperature sensors (RBR and Vemco)
                    • 8 dissolved oxygen (RBR and MiniDot)
                    • 6 PAR sensors (Licor and RBR)
                    • An EXOsonde from YSI with pH, Chlorophyll-a, Turbidity and Conductivity, fixed at a depth of 2.5 m

 

Trios-Ramses - Irradiance and radiance

It will be soon installed on the platform.

Autonomous Moored Profiler Thetis

Thetis is an Autonomous Moored Profiling Platform developed by Wetlabs. It is installed in the protection perimeter and takes vertical profiles from a depth of 50m to 0.5m every three hours. Data is transmitted in real time via GSM, when Thetis is at the surface. This high-tech instrument gives complete bio-optical water properties, and will be used as calibration for remote sensing.

 

 

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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