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.

有机碳通过中层海洋(100-1000米)下沉是大气二氧化碳的一个重要的长期汇，也是深海和底栖生态系统的碳源。该项目的研究成果将对碳通量科学做出重大贡献，这对改善气候预测和了解深层生态系统都是重要的。该项目已提交给海洋科学博士后研究奖学金计划，并将进一步促进一位有前途的科学家的职业生涯。鉴于研究中层海洋碳通量的全球性，HervéClaustre将在法国维尔利弗雷海洋实验室(LOV)主持下，并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综合活动办公室的资助。温度和亚极地浮游植物水华造成了大量的中层碳通量。未来，由于气候变化，中层海洋通量模式可能会发生很大变化，有可能造成气候反馈和/或威胁深层生态系统。目前测量中层海洋通量的技术在后勤方面具有挑战性，涉及到物理样品的提取。由于抽样规模和方法的不同，目前的方法也很难比较。在这个项目中，该研究员将通过将该研究员在研究生学习期间开发的新方法应用于一个大型的“Bio-Argo”浮游数据集，来扩大高纬度浮游植物水华期间中高层通量测量的覆盖面。该项目产生的通量数据集将对科学界大有裨益，除了使用传统方法进行密集的、针对区域的通量研究外，还可以对全球模式进行广泛分析。通过确定通量及其驱动因素的大尺度模式，这项工作将增加对所研究地区的了解，并帮助卫星海洋学家和建模人员测试和改进通量产品。此外，随着Bio-Argo船队的扩张，形成一个永久的全球网络，这项工作将形成更大的东西：全球原位通量记录。因此，在分析这一项目期间学到的方法学经验教训将为今后的抽样战略和验证工作提供参考，有助于确保这一全球记录的质量。