The Deployment of a Buoy-Mounted Aerosol Sampler on the Bermuda Testbed Mooring

在百慕大试验台系泊装置上部署浮标式气溶胶采样器

• 批准号: 0350229
• 负责人: Edward Sholkovitz
• 金额: $ 22.09万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-03-15 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0350229&HistoricalAwards=false
• 关键词: Deployment; Buoy; Mounted; Aerosol; Sampler

ABSTRACTOCE- 0350229The Iron Hypothesis was built around the argument that phytoplankton production in large regions of the world's oceans is limited by iron. A large number of laboratory studies, field projects, and modeling efforts continue to make this area of research a hot topic within biological and chemical oceanography. Iron fertilization from ships does result in the enhanced biological productivity of surface waters. In contrast, enhanced ocean productivity, following the atmospheric deposition of naturally occurring iron, is not well documented. Looking to apply new technologies that link atmospheric processes with chemical and biological oceanography, a researcher from the Woods Hole Oceanographic Institution will deploy a buoy-mounted aerosol sampler on the Bermuda Testbed Mooring (BTM) buoy with the primary objective of producing a time-series for the concentrations of mineral dust, Fe and other geochemically important elements. Aerosol sampling will start before and end after the period of the large-scale transport of African dust to the Sargasso Sea and Bermuda, which occurs in July and August. If the instrument works as designed, the proposed study will produce the first time-series to have captured and quantified dust events at the air-sea boundary from a moored buoy. The aerosol sampler deployment will coincide with Boyle's deployment of the MITESS water sampler under the BTM buoy. This joint deployment will allow for a comparison between the temporal variations in the atmospheric deposition of mineral dust (Fe) and the surface water concentrations of Fe. While the proposed project involves testing new technologies, it has implications for drawing longer-term connections between iron deposition, primary productivity and ecosystem dynamics. Atmospheric concentrations and deposition rates of iron, derived from buoy-mounted instruments, can also provide observational data that can be compared to model simulations of iron deposition to the ocean.

铁假说是建立在浮游植物生产在世界海洋的大区域是由铁限制的论点。 大量的实验室研究，实地项目和建模工作继续使这一研究领域成为生物和化学海洋学的热门话题。 船舶施铁肥确实提高了表层沃茨的生物生产力。 相比之下，在自然产生的铁在大气中沉积之后，海洋生产力的提高却没有很好的记录。 伍兹霍尔海洋学研究所的一名研究人员希望应用将大气过程与化学和生物海洋学联系起来的新技术，将在百慕大试验台系泊浮标上安装一个悬挂式气溶胶采样器，主要目的是制作矿物尘埃、铁和其他重要地球化学元素浓度的时间序列。 气溶胶采样将在非洲尘埃大规模输送到马尾藻海和百慕大之前开始，之后结束，这发生在7月和8月。 如果仪器按设计工作，拟议的研究将产生第一个时间序列，从系泊浮标捕获和量化海气边界的尘埃事件。 气溶胶采样器的部署将与波义耳在BTM浮标下部署MITESS水采样器的时间一致。 这种联合部署将允许在大气沉积的矿物粉尘（Fe）和地表水的Fe浓度的时间变化之间的比较。 虽然拟议的项目涉及测试新技术，但它对绘制铁沉积、初级生产力和生态系统动态之间的长期联系具有影响。 从安装在卫星上的仪器获得的大气中铁的浓度和沉积速率也可以提供观测数据，这些数据可以与海洋铁沉积的模型模拟进行比较。