P-NEXFS investigation of the influence of aerosol phosphorus on the Mediterranean Sea

P-NEXFS 气溶胶磷对地中海影响的调查

• 批准号: 1357375
• 负责人: Ellery Ingall
• 金额: $ 28.89万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-02-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1357375&HistoricalAwards=false
• 关键词: NEXFS; investigation; influence; aerosol; phosphorus

Primary nutrients, such as nitrogen and phosphorus, are critical for all life on earth, and limited quantities in the marine environment can inhibit primary productivity. Atmospheric aerosols are a significant source of these nutrients to nutrient-poor ocean regions, such as the phosphorus-limited Mediterranean Sea. The availability of phosphorus in aerosols has traditionally been linked to the composition and abundance of different phosphorus phases present. Unfortunately, investigating phosphorus composition in aerosols has been challenging due to methodological limitations until recently. In this study, researchers from Georgia Tech will use a new technique known as synchrotron-based P Near Edge X-ray Fluorescence Spectroscopy, in conjunction with X-ray fluorescence microscopy, to examine the diversity of aerosol phosphorus phases delivered to the Mediterranean Sea. By defining the relationship between air mass source region, aerosol composition, and bioavailability, results from this work will improve current knowledge of the factors regulating productivity in the Mediterranean Sea and help to clarify the potential response of this region to different climate change scenarios. Broader Impacts: In addition to the valuable insights this project will provide on the controls on productivity and nutrient cycling in the Mediterranean Sea, this study will further education of young scientists, broaden participation of under-represented groups in ocean science, and enhance research infrastructure.

氮和磷等主要营养素对于地球上的所有生命至关重要，海洋环境中的数量有限可以抑制一级生产率。大气气溶胶是这些营养物质的重要来源，例如富有贫民的海洋地区，例如磷限制的地中海。传统上，磷在气溶胶中的可用性与存在的不同磷相的组成和丰度有关。不幸的是，由于方法论上的局限性直到最近，研究气溶胶中的磷组成一直在挑战。 在这项研究中，佐治亚理工学院的研究人员将使用一种新技术，称为基于同步加速器的P近边缘X射线荧光光谱，并与X射线荧光显微镜结合使用，以检查传递到地中海海的气溶胶磷相的多样性。 通过定义空气质量源区域，气溶胶组成和生物利用度之间的关系，这项工作的结果将提高人们对调节地中海生产率的因素的当前知识，并有助于阐明该地区对不同气候变化情景的潜在反应。更广泛的影响：除了该项目的宝贵见解外，该项目还将提供有关地中海生产力和营养循环的控制，这项研究还将进一步对年轻科学家进行教育，扩大代表性不足的海洋科学群体的参与，并增强研究基础设施。

项目成果

Relationship between Atmospheric Aerosol Mineral Surface Area and Iron Solubility

大气气溶胶矿物表面积与铁溶解度的关系

• DOI: 10.1021/acsearthspacechem.9b00152
• 发表时间: 2019
• 期刊: ACS Earth and Space Chemistry
• 影响因子: 3.4
• 作者: McDaniel, Mary Francis;Ingall, Ellery D.;Morton, Peter L.;Castorina, Erin;Weber, Rodney J.;Shelley, Rachel U.;Landing, William M.;Longo, Amelia F.;Feng, Yan;Lai, Barry
• 通讯作者: Lai, Barry