Examples of CTD in a sentence
CTD stations with discrete water sampling are marked with yellow stars and the vertical instrument cast with a purple star.
The stainless steel frame acts as a platform and allows attachment of instrument battery (top right side), CTD (blue at the bottom right) and a commercial CH4 sensor and its battery pack (left side).120 Sensors with membrane inlets can be sensitive to fluctuating water flow over the membrane, which can result in artificial variability of measured concentrations.
Temperature, salinity, pressure, and sound velocities, all required for correct quantification, were provided by the CTD casts.
The sensor showed no memory effects, i.e. different response times between increased and decreased CH4 concentrations.Analysis of discrete samples (DS) from CTD casts 1618 and 1619 and the vertical MILS cast 1616 give further insights to the 240 heterogeneity and temporal variation of the dissolved CH4 distribution (Fig.
The sensors fitted to the Aanderaa CTD, a Conductivity Sensor 4319,a Temperature Sensor 4060, and an Oxygen Optode 4330, has initial accuracies of ± 0.03°C , ± 5 mS m-1, and < ± 8 µM and resolutions of 0.001 °C, 0.2 mS m-1, and < 1 µM, respectively.Lowering and heaving of the probe in the water column allowed for vertical casts, while towing the probe behind the moving ship at varying heights above the seafloor generated near-horizontal trajectories.