CTD and Friends
What is a CTD?
A CTD is a package of electronic devices that measures conductivity, temperature, and depth.
What does it do?
It measures how well a solution conducts electricity and is directly related to salinity (the concentration of salt and other inorganic compounds in sea water). Salinity measurements can be utilized to determine sea water density.
How is it collected?
They look for temperature and particle anomalies that identify hydrothermal plumes. They then send signals to the rosette when they want to close a bottle or obtain a water sample. A winch on the ship lowers and raises the CTD through the water. This would then allow seawater samples to be retrieved from the bottles once the instrument package is brought back to the ship.
A CTD is a package of electronic devices that measures conductivity, temperature, and depth.
What does it do?
It measures how well a solution conducts electricity and is directly related to salinity (the concentration of salt and other inorganic compounds in sea water). Salinity measurements can be utilized to determine sea water density.
How is it collected?
They look for temperature and particle anomalies that identify hydrothermal plumes. They then send signals to the rosette when they want to close a bottle or obtain a water sample. A winch on the ship lowers and raises the CTD through the water. This would then allow seawater samples to be retrieved from the bottles once the instrument package is brought back to the ship.