CTD Observation

 Water temperature and salinity are the most fundamental characteristics of seawater, and CTD (Conductivity-Temperature-Depth profiler) observations that measure their vertical distribution are fundamental to ocean observations. This is because water temperature and salinity are not only variables that determine the "density" that governs the dynamics of seawater, but are also important factors that influence biological and chemical processes in the ocean. Furthermore, CTD observations are also essential in the field of acoustic measurement, as represented by bathymetry, to estimate underwater sound velocity and sound wave absorption and attenuation.

→Method of Ocean Observation (1) CTD Observation