Deposition of trace metals in Saharan Dust to the Equatorial Atlantic Ocean: Analysis of samples collected during Meteor-55 (M 55)

撒哈拉尘埃中的微量金属沉积到赤道大西洋：对 Meteor-55 (M 55) 期间收集的样本进行分析

• 批准号: 5410456
• 负责人: Dr. Peter Leslie Croot
• 金额: --
• 依托单位: Department of Earth and Ocean Sciences
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5410456?language=en
• 关键词: Deposition; trace; metals; Saharan; Dust

The deposition of Saharan dust to the Equatorial Atlantic is believed to be the major factor controlling the distribution and concentration of several key trace metals in this region. Globally the Equatorial Atlantic receives the greatest amount of terrestrial dust to its surface waters than any other location on the Earth and subsequently is a great natural laboratory for examining the biogeochemical process occurring when atmospheric dust interacts with the upper ocean. In particular the chemical and biological reactions involving iron contained in the dust are important to understand as iron is known to be a key limiting nutrient in many parts of the open ocean, and atmospheric deposition is believed to be the main supply route. The surface layer distributions of the other trace metals found in the dust provides critical information about the fluxes and dissolution of the dust as it interacts with the seawater. Comparison with elements not enriched in the dust allows calculation of other critical parameters; including vertical mixing and biological uptake.

撒哈拉尘埃沉积到赤道大西洋被认为是控制该区域几种关键微量金属分布和浓度的主要因素。在全球范围内，赤道大西洋的表面沃茨比地球上任何其他地方接收的陆地尘埃量都要多，因此是一个伟大的天然实验室，用于研究大气尘埃与上层海洋相互作用时发生的地球化学过程。特别是涉及灰尘中所含铁的化学和生物反应是重要的，因为铁是已知的在公海的许多地方是一个关键的限制营养素，大气沉积被认为是主要的供应途径。在尘埃中发现的其他微量金属的表层分布提供了关于尘埃与海水相互作用时的通量和溶解的关键信息。与灰尘中未富集的元素进行比较可以计算其他关键参数;包括垂直混合和生物吸收。