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

铁假设是围绕着这样一个论点建立起来的：世界海洋大片地区的浮游植物生产受到铁的限制。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中的热门话题。船上的铁肥确实能提高地表水的生物生产力。相比之下，由于大气中自然产生的铁的沉积而导致的海洋生产力的提高，并没有得到很好的记录。为了应用将大气过程与化学和生物海洋学联系起来的新技术，伍兹霍尔海洋研究所的一名研究人员将在百慕大试验台系泊（BTM）浮标上部署一个安装在浮标上的气溶胶采样器，其主要目标是生成矿物粉尘、铁和其他地球化学重要元素浓度的时间序列。气溶胶采样将在非洲沙尘向马尾藻海和百慕大大规模输送的时期之前和之后开始，这一时期发生在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从系泊浮标捕获和量化海气边界尘埃事件的时间序列。气溶胶采样器的部署将与Boyle在BTM浮标下部署MITESS水采样器同时进行。这一联合部署将能够比较大气中矿物粉尘（铁）沉积的时间变化和地表水中铁的浓度。虽然拟议的项目涉及测试新技术，但它对铁沉积、初级生产力和生态系统动态之间的长期联系具有重要意义。从安装在浮标上的仪器得到的大气中铁的浓度和沉积速率也可以提供观测数据，这些数据可以与模拟铁向海洋沉积的模式进行比较。

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.