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.

了解颗粒物从表层海洋向海洋内部的输出通量是全球碳平衡的一个重要方面，因此对理解气候变化的动力学具有重要意义。直到最近，表面系泊浮式沉积物捕集器(STST)一直在研究表面通量，但这些研究一直受到其设计中固有的人工制品不确定性的困扰。该项目将测试一种通过中性浮力沉积物捕集器(NBST)测量表面通量的新方法，用于研究上层海洋的生物地球化学循环。要检验的假设是，对上层海洋出口通量的直接采样最好是使用在保持特定深度的情况下随水平洋流自由漂移的NBST。该计划是在马尾藻海的五个游轮上部署NBST，并测量第234个水柱库存和相关的圈闭活动。