Neutrally-Buoyant Sediment Traps for Direct Sampling of the Upper Ocean Export Flux

用于上层海洋输出通量直接采样的中性浮力沉积物捕集器

• 批准号: 9912044
• 负责人: James Price
• 金额: $ 55.06万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9912044&HistoricalAwards=false
• 关键词: Neutrally; Buoyant; Sediment; Traps; Direct

ABSTRACTOCE-9912044Understanding the export flux of particles from the surface ocean to the oceanic interior is an important aspect of the global carbon balance, and as such has great relevance to understanding the dynamics of climate change. Until recently, surface fluxes have been investigated by surface tethered floating sediment traps (STST), but these have been plagued by uncertainties in artifacts inherent in their design. This project will test a new approach to measuring surface flux by way of a neutrally buoyant sediment trap (NBST) for studies of biogeochemical cycling in the upper ocean. The hypothesis to be tested is that direct sampling of the upper ocean export flux can best be accomplished by the use of NBSTs that drift freely with horizontal currents while maintaining a specified depth. The plan is to deploy NBSTs on five cruises in the Sargasso Sea, and measure the 234Th water column inventory and associated trap activity.

Abstractoce-9912044无法理解从地面海洋到海洋内部的颗粒的出口通量是全球碳平衡的重要方面，因此与理解气候变化的动态具有很大的相关性。直到最近，已经通过表面束缚的浮子陷阱（STST）研究了表面通量，但是它们的设计固有的伪影中的不确定性困扰着这些磁通量。该项目将通过中性浮力的沉积物陷阱（NBST）测量一种新方法来测量表面通量，以研究上海中的生物地球化学循环。 要测试的假设是，可以通过使用水平电流自由漂移的同时在保持指定深度的同时自由漂移的NBST来实现上海导出通量的直接采样。该计划是在萨尔加索海的五次巡游中部署NBST，并测量第234水柱清单和相关的陷阱活动。