Ultra high-resolution seawater density sensor based on a refractive index measurement using the spectroscopic interference method.

ABSTRACT: The interference method is one of the most sensitive methods for measuring the refractive index of seawater. We developed a state-of-the-art density sensor for seawater measurements based on measuring the refractive index by the interference method. The resolution of the density sensor is 0.00006 kg/m³ for changing temperature at constant salinity and pressure, 0.00012 kg/m³ for changing salinity at constant temperature and pressure, and 0.00010 kg/m³ for changing pressure at constant temperature and salinity. These resolution values are the best in the history of seawater density measurements. The ultra high-resolution density sensor will contribute notably to climate research at full ocean depth and measurement of seawater sampled from the deep ocean, to

SUBMITTER: Uchida H 

PROVIDER: S-EPMC6820790 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature