Evaluation of Methods for Long-term Conductivity Measurements for the World Ocean Circulation Experiment (WOCE)

世界海洋环流实验（WOCE）长期电导率测量方法评估

• 批准号: 8715401
• 负责人: James Irish
• 金额: $ 4.4万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1989-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715401&HistoricalAwards=false
• 关键词: Evaluation; Methods; Long; term; Conductivity

This project addresses the sensors and recording system necessary to make long term in situ measurements of water properties. The main problem in obtaining the required accuracy (about 0.01 ppt for salinity) is the stability of conductivity measurements. The principal investigator has been working with moored conductivity measurements for the past 15 years and has used both electrode and inductive sensors. In the deep ocean, very small drifts have been observed over several months, but in shallow waters, drifts of as large as 0.1 ppt in salinity have occurred in a few months. Four tasks will be carried out: (1) conductivity sensor performance in various configurations and locations will be summarized, (ii) spatial and temporal aliasing errors will be investigated, (iii) sampling and digitizing accuracy will be estimated, and (iv) a power budget and memory size will be derived.

该项目涉及传感器和记录系统，需要进行长期的原位测量水的性质。获得所需精度（盐度约0.01个百分点）的主要问题是电导率测量的稳定性。在过去的15年里，首席研究员一直在研究系泊电导率测量，并使用了电极和电感传感器。在深海中，在几个月内观察到非常小的漂移，但在浅水中，在几个月内发生了高达0.1 ppt的盐度漂移。将进行四项任务：(1)总结电导率传感器在不同配置和位置的性能，（ii）研究空间和时间混叠误差，（iii）估计采样和数字化精度，以及（iv）推导功率预算和内存大小。