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首页> 外文期刊>Oceanography >The Pressure of In Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O_2 and N_2 in Surface Ocean Waters
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The Pressure of In Situ Gases Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O_2 and N_2 in Surface Ocean Waters

机译：原位气体仪器（PIGI）的压力为溶解O_2和表面海水中的溶解O_2和N_2的压力

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摘要

We describe an autonomous flow-through system capable of continuous, unattended measurements of oxygen (O-2) and nitrogen (N-2) concentrations in surface seawater. The derived biological O-2 saturation anomaly, Delta O-2/N-2, can be used to estimate mixed-layer net community production (NCP) in place of Delta O-2/Ar-based estimates obtained via mass spectrometry. Our Pressure of In situ Gases Instrument (PIGI) consists of two parallel flow-through chambers: the first contains a buoyancy-driven debubbler, and the second houses an Aanderaa optode and Pro-Oceanus gas tension device (GTD). Custom-designed software is provided to visualize and record observations in real time and to post-process data. The system has been tested in the laboratory and on more than 15 deployments in various ocean regions. The PIGI has average optode and GTD response times of similar to 1.1 min and 1.6 min, respectively; it shows good calibrated accuracy based on comparisons with discrete samples; and the derived Delta O-2/N-2 exhibits strong coherence with independent Delta O-2/Ar measurements from mass spectrometry. We conclude with recommendations for successful field use and potential future modifications to support a range of deployments strategies. Overall, the system can be used as a cost-effective tool for increasing global coverage of NCP estimates from research vessels, volunteer observing ships, and land-based observatories.
机译：我们描述了能够连续，无人看管的氧气（O-2）和表面海水中氮（N-2）浓度的自主流动系统。衍生的生物O-2饱和异常，ΔO-2 / N-2可用于估计混合层Net群落生产（NCP）代替通过质谱法获得的基于ΔO-2 / Ar的估计。我们的原位气体仪器（PIGI）的压力由两个平行的流过室组成：首先包含一个浮力驱动的脱棉机，第二个房屋是Aanderaa光电和Pro-Oceanus气体张力装置（GTD）。提供定制设计的软件，以实时显示和记录观察和后处理数据。该系统已在实验室进行测试，并在各种海洋区域的15个以上的部署。 PIGI分别具有平均光电极和GTD响应时间，同样与1.1分钟和1.6分钟相似;它基于与离散样品的比较显示出良好的校准精度;衍生的δO-2 / N-2表现出强烈的ΔO-2 / AR测量强烈的质谱，从质谱表现出强烈的相干性。我们结束了建议，以获得成功的现场使用和潜在的未来修改，以支持一系列部署策略。总的来说，该系统可用作具有成本效益的工具，用于增加研究船只，志愿者观察船舶和陆地观测者的NCP估计的全球覆盖。

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  • 来源
    《Oceanography》 |2020年第2期|156-162|共7页
  • 作者

    Izett Robert W.; Tortell Philippe D.;

  • 作者单位

    Univ British Columbia Dept Earth Ocean & Atmospher Sci Vancouver BC Canada;

    Univ British Columbia Dept Earth Ocean & Atmospher Sci Vancouver BC Canada|Univ British Columbia Dept Bot Vancouver BC Canada;

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