Characterization of atmospheric iron over and its fluxes to the Southern Ocean through shipboard measurements

通过船上测量表征大气铁及其流向南大洋的通量

• 批准号: 0944589
• 负责人: Yuan Gao
• 金额: $ 30万
• 依托单位: Rutgers University Newark
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-15 至 2013-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0944589&HistoricalAwards=false
• 关键词: Characterization; atmospheric; iron; over; its

Abstract High nutrient low chlorophyll regions of the Southern Ocean are conventionally explained by lack of bioavailable iron (Fe). Various localized sources of Fe in the Southern Ocean/Antarctic continental margins have been proposed and studied. In areas removed from obviously localized terrestrial dust sources, air-sea deposition of aerosol Fe, the particle size distribution of atmospheric Fe and the variability of aerosol composition, including other atmospheric constituents that may affect the bioavailability of Fe and micronutrients, is not well observed. This project seeks to conduct shipboard atmospheric sampling and analysis from a Chinese ice breaker (R/V Xue Long) passing through the Southern Ocean on route from Shanghai to Zhongshan Station, Antarctica Bulk aerosol and size segregated aerosol samples will be measured for their chemical, physical and morphological properties, Fe content by capillary waveguide spectrophotometry, elemental composition by mass spectrometry (ICPMS), along with corresponding water soluble fractions. Precipitation samples, when encountered, will also be analyzed to derive wet deposition fluxes. Satellite remote sensing of aerosol dust products and chemical transport modeling approaches will also be used in data interpretation.

通常，由于缺乏生物利用的铁（FE）来解释抽象的高营养较低叶绿素区域。已经提出和研究了南大洋/南极大陆边缘的FE的各种局部局部化来源。在从明显局部的陆地尘埃中去除的区域中，气溶胶FE的空气沉积，大气中的粒度分布和气溶胶成分的可变性，包括其他可能影响Fe和微量营养素的生物利用度的大气成分。该项目旨在从中国破冰船（R/V Xue Long）进行船上大气采样和分析。物理和形态学特性，毛细管波导分光光度法，质谱元素组成（ICPMS）以及相应的水溶性馏分的Fe含量。遇到降水样品时，还将分析以得出湿沉积通量。气溶胶粉尘产品和化学传输建模方法的卫星遥感也将用于数据解释。