OCE PRF Track 2 (International): Tracking mesopelagic carbon flux and particle size on a multi-ocean scale using a fleet of bio-optical profiling floats

OCE PRF Track 2（国际）：使用一组生物光学剖面浮标跟踪多海洋尺度的中层碳通量和颗粒尺寸

• 批准号: 1420929
• 金额: $ 19.4万
• 依托单位: Briggs Nathan
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-02-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1420929&HistoricalAwards=false
• 关键词: OCE; PRF; Track; International; Tracking

The sinking of organic carbon through the mesopelagic ocean (100-1000 meters) represents an important long-term sink for atmospheric carbon dioxide and a carbon source for deep-sea and benthic ecosystems. Research results from this project will make a significant contribution to the science of carbon flux, which is important both for improving climate projections and understanding deep ecosystems. The project was submitted to the Ocean Sciences Postdoctoral Research Fellowship program and will further the career of a promising scientist. Given the global nature of studying carbon flux in the mesopelagic, the fellow is being hosted by Hervé Claustre at the Laboratoire d'Oceanographie de Villefranche(LOV) in France and building strong international collaborations to improve understanding on this internationally important topic. This award was supported with funding from the Office of International and Integrative Activities.Temperate and subpolar phytoplankton blooms account for large amounts of mesopelagic carbon flux. Mesopelagic flux patterns may change considerably in the future due to climate change, potentially causing climate feedbacks and/or threatening deep ecosystems. Current technologies for measuring mesopelagic flux are logistically challenging, involving the retrieval of physical samples. Current methods are also difficult to compare, due to differing sampling scales and methods. In this project, the fellow will increase coverage of mesopelagic flux measurements during high-latitude phytoplankton blooms by applying novel methods the fellow developed during graduate studies to a large "Bio-Argo" float dataset. The flux dataset produced as a result of this project will be of great benefit to the scientific community, allowing broad analysis of global patterns in addition to the intensive, region-specific flux studies undertaken using traditional methods. By identifying broad-scale patterns in flux and their drivers, this work will increase knowledge of the regions studied and help satellite oceanographers and modelers test and improve flux products. Furthermore, as the Bio-Argo fleet expands to form a permanent, global network, this work will form the start of something bigger: a global, in situ flux record. As such, methodological lessons learned during analysis of this project will inform future sampling strategies and validation efforts, helping to ensure the quality of this global record.

中层海洋（100-1000米）的有机碳下沉是大气二氧化碳的重要长期汇，也是深海和底栖生态系统的碳源，该项目的研究成果将为海洋生态系统做出重大贡献。碳通量科学，这对于改善气候预测和了解深层生态系统都很重要，该项目已提交给海洋科学博士后研究奖学金计划，鉴于研究碳通量的全球性质，将促进有前途的科学家的职业生涯。该奖项由法国自由城海洋实验室 (LOV) 的埃尔韦·克劳斯特 (Hervé Claustre) 主持，旨在建立强有力的国际合作，以增进对这一国际重要主题的理解。该奖项得到了国际和海洋学办公室的资助。综合活动。温带和亚极地浮游植物的大量繁殖造成了大量的中层碳通量，未来中层碳通量模式可能会发生很大变化。由于气候变化，可能引起气候反馈和/或威胁深层生态系统，目前测量中层通量的技术在逻辑上具有挑战性，由于采样规模和方法不同，目前的方法也很难进行比较。在该项目中，该研究员将通过将其在研究生学习期间开发的新方法应用于大型“Bio-Argo”浮游数据集产生的通量数据集，扩大高纬度浮游植物繁殖期间中层通量测量的覆盖范围。因此，该项目将为科学界带来巨大好处，除了使用传统方法进行密集的、特定区域的通量研究之外，还可以通过识别大范围的通量模式及其驱动因素，对全球模式进行广泛的分析。这项工作将增加对所研究区域的了解，并帮助卫星海洋学家和建模者测试和改进通量产品。此外，随着 Bio-Argo 舰队扩大形成永久的全球网络，这项工作将成为更大的事情的开始：全球。 ，原位通量记录因此，方法学上的经验教训。在对该项目的分析过程中，将为未来的采样策略和验证工作提供信息，有助于确保该全球记录的质量。