Effect of sediment suspensions on seawater conductivity measurements

Data are in small files recorded in April 2015 and March 2016 during experiments made in Shom's metrology laboratory. A 2 liter cylindrical container, immersed in a calibration bath, was filed with seawaters of practical salinities 35 or 38, and stabilized in temperature at 10 °C to better than 1 mK. 10 °C was choosen to avoid seawater evaporation during measurements. Measurements were made with a calibrated CTD recorder SBE 37 placed in the cylindrical container and a reference temperature probe SBE 35 placed in the calibration bath. Sand or sediments were added progressively in the container and mixed with a stirring propeller. After each increase in sand concentration, a file was recorded. Measurements were made at concentrations: 0, 50, 100, 200, 300, 500, 700, 900, 1100, 2000, 3000 and 5000 mg/l.<br> The sand comes from Plouneour-Trez beach in Brittany, France, 48° 39′ North, 4° 19′ West. The sediments come from muds taken in the Abers Benoit (Treglonou) and Le Faou bays (France) located respectively at 48° 33′ North, 4° 32′ West and 48° 17′ 36″ North, 4° 10′ 39″ West.