Ultra high-resolution seawater density sensor based on a refractive index measurement using the spectroscopic interference method
Ultra high-resolution seawater density sensor based on a refractive index measurement using the spectroscopic interference method
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DOI：
10.1038/s41598-019-52020-z
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发表时间：
2019-10-29
影响因子：
4.6
通讯作者：
Maeda, Yosaku
中科院分区：
文献类型：
--
作者：
Uchida, Hiroshi;Kayukawa, Yohei;Maeda, Yosaku
干涉法是测量海水折射率最灵敏的方法之一。我们开发了一种最先进的密度传感器，用于基于干涉法测量折射率的海水测量。密度传感器的分辨率在恒定盐度和压力下改变温度时为0.00006 kg/m(3)，在恒定温度和压力下改变温度时密度传感器的分辨率为0.00012 kg/m(3)，在恒定温度和盐度下改变压力时密度传感器的分辨率为0.00010 kg/m(3)。这些分辨率值是海水密度测量史上最好的。超高分辨率密度传感器将显着有助于全海洋深度的气候研究和从深海采样的海水测量、计量学研究以建立盐度测量的可追溯性，以及海底资源勘探以结合传统的基于电导的盐度测量来检测绝对盐度异常的空间变化。
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/m(3) for changing temperature at constant salinity and pressure, 0.00012 kg/m(3) for changing salinity at constant temperature and pressure, and 0.00010 kg/m(3) 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 research on metrology to establish the traceability of salinity measurements, and to submarine resource exploration to detect spatial changes in the absolute salinity anomaly by combining with conventional conductance-based salinity measurements.