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.

氮和磷等主要营养物质对地球上的所有生命都至关重要，海洋环境中的有限数量会抑制初级生产力。大气气溶胶是营养贫乏海洋地区（例如磷含量有限的地中海）这些营养物质的重要来源。传统上，气溶胶中磷的有效性与存在的不同磷相的组成和丰度有关。不幸的是，由于方法学的限制，直到最近，研究气溶胶中的磷成分一直具有挑战性。 在这项研究中，佐治亚理工学院的研究人员将使用一种称为基于同步加速器的 P 近边 X 射线荧光光谱的新技术，结合 X 射线荧光显微镜，来检查输送到地中海的气溶胶磷相的多样性。 通过定义气团源区、气溶胶成分和生物利用度之间的关系，这项工作的结果将提高目前对调节地中海生产力因素的认识，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：除了该项目将为控制地中海生产力和营养物循环提供宝贵的见解外，该研究还将进一步教育年轻科学家，扩大海洋科学领域代表性不足群体的参与，并加强研究基础设施。

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