Collaborative Research: In situ measurements of oxygen and nitrate with profiling floats deployed at ocean time-series stations

合作研究：利用部署在海洋时间序列站的剖面浮标对氧气和硝酸盐进行原位测量

• 批准号: 0825348
• 负责人: Kenneth Johnson
• 金额: $ 59.64万
• 依托单位: Monterey Bay Aquarium Research Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0825348&HistoricalAwards=false
• 关键词: Collaborative; Research; situ; measurements; oxygen

In this project, researchers at the Monterey Bay Aquarium Research Institute and the University of Washington will construct and deploy Apex profiling floats equipped with ISUS optical nitrate sensors, Aanderaa oxygen optodes and Wet Labs ECO fluorometers. Two floats per year will be deployed at the HOT (Hawaii Ocean Time series) station, BATS (Bermuda Atlantic Time Series) station and at Ocean Station Papa in the Gulf of Alaska. Two additional float will be deployed each year in the Southern Ocean. These floats will provide time series observations of biogeochemical processes at these sites with temporal resolution that cannot be sustained by the current shipboard observations. With life spans for each float of four years, the float network will also provide significantly improved spatial resolution around each of the deployment sites near the end of this project.These float-based sensors provide the potential to study a variety of processes. The project leaders recently demonstrated that profiling floats can provide time series observations of Net Community Production below the mixed layer based on dissolved oxygen measurements. The continuous measurements of NCP demonstrate that the euphotic zone of the subtropical ocean produces oxygen (net autotrophic) and that episodic events of high NCP are not required to sustain a positive autotrophic balance. These measurements thus may resolve a fundamental controversy as to whether the oligotrophic ocean is net heterotrophic or net autotrophic. Near the BATS site the floats will likely provide significantly improved understanding of the role of eddies in sustaining elevated primary production rates. At high latitudes, the floats will provide an unparalled view of the interaction of vertical mixing with timing of the spring bloom. Two types of Broader Impacts will result from this work. The project will "stimulate and support the development and dissemination of next-generation instrumentation, multi-user facilities, and other shared research and education platforms." And secondly, by making the data from this research directly available in real time to the research and education, it will "advance discovery and understanding while promoting teaching, training and learning." Information about the project and the data stream it produces will also be made available on a dedicated web site.

在该项目中，蒙特雷湾水族馆研究所和华盛顿大学的研究人员将构建和部署配备ISUS光学硝酸盐传感器，Aanderaa氧气氧气和湿实验室生态荧光计的浮子。每年将部署两个浮标，将部署在热门（夏威夷海洋时间系列），蝙蝠（百慕大大西洋时间系列）站和阿拉斯加湾的海洋站爸爸。每年将在南大洋中部署两个浮动。这些浮子将提供时间序列的观测，这些时间序列的时间分辨率无法通过当前的船上观测来维持的时间分辨率。由于寿命跨度为四年，因此浮点网络还将在该项目结束时在每个部署地点周围提供显着改进的空间分辨率。这些基于浮点的传感器提供了研究各种过程的潜力。 该项目负责人最近表明，基于溶解的氧测量值，浮子可以提供在混合层下方的净社区生产的时间序列观察结果。 NCP的连续测量表明，亚热带海洋的舒适区会产生氧气（净自养），并且不需要高NCP的发作事件来维持阳性的自养平衡。因此，这些测量结果可能会解决贫营养海洋是净异养还是净自养的基本争议。在蝙蝠站点附近，浮子可能会显着提高人们对涡流在维持升高初级生产率中的作用的理解。在高纬度地区，浮子将提供垂直混合与弹簧盛开的相互作用的无与伦比的视图。这项工作将造成两种更广泛的影响。 该项目将“刺激和支持下一代工具，多用户设施以及其他共同的研究和教育平台的开发和传播”。 其次，通过将这项研究的数据直接实时提供给研究和教育，它将“在促进教学，培训和学习的同时提高发现和理解”。 有关项目及其生产的数据流的信息也将在专用网站上提供。