Collaborative Proposal: GEOTRACES Pacific Section: Collection and analysis of atmospheric deposition

合作提案：GEOTRACES 太平洋部分：大气沉降的收集和分析

• 批准号: 1454368
• 负责人: Clifton Buck
• 金额: $ 11.8万
• 依托单位: University of Georgia Research Foundation Inc
• 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: 2014-05-30 至 2016-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1454368&HistoricalAwards=false
• 关键词: Collaborative; Proposal; GEOTRACES; Pacific; Section

During the 2013 GEOTRACES Eastern Pacific zonal transect, a gradient in aerosol inputs to surface waters will be encountered with higher inputs near Peru and decreasing offshore. This zonal section contrasts sharply to the high aerosol deposition areas found and sampled during the GEOTRACES North Atlantic Zonal Section in the fall of 2010 and 2011. As such, this Pacific section represents a unique opportunity to characterize aerosol and rainfall chemistry in a low deposition environment. Scientists from the University of Alaska and Florida State University plan to collect and characterize aerosol and rainfall samples along this transect, as well as distribute samples to the community. Bulk and size-fractionated aerosol samples collected on a 24 to 48-hour integrated basis and event-based rain samples will be analyzed for trace elements and isotopes (TEIs) to quantify their atmospheric input. The TEIs to be analyzed will be aluminum, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, cadmium, lead, and thorium, as well as the major ions sodium, magnesium, potassium, calcium, nitrate, phosphate, chlorine, and fluorine. Other efforts to be carried out as part of this study include (1) aerosol leaches to determine seawater-soluble and ultrapure-water-soluble TEI fractions: (2) determine the size fractionation and redox speciation of seawater-soluble iron: (3) obtain subsamples of water column samples from other GEOTRACES scientists for the analysis of the TEIs of interest to help interpret the atmospheric deposition data; and (4) collaborate with researchers from other institutions to characterize and constrain estimates of atmospheric deposition. This project will contribute towards the overall goal of the GEOTRACES Program by establishing the range of fractional aerosol solubility and better quantify deposition across the global ocean. One graduate student from the University of Alaska would be supported and trained as part of this project. Relying on a cruise blog, email, and project website updates, the scientist from the University of Alaska plans to continue her interactions with students in Alaska, Arizona, and Florida and results from the study would be incorporated into class curricula, as well as disseminated via public outreach and web dissemination.

在2013年地理位置东部太平洋区域样带期间，将在秘鲁附近较高的输入并降低海上水溶液输入中的气溶胶输入梯度。这个区域截面与2010年秋季和2011年秋季北大西洋地区的地理区域中发现和采样的高气溶胶沉积区域形成鲜明对比。因此，这个太平洋部分代表了在低沉积环境中表征气溶胶和降雨化学的独特机会。 阿拉斯加大学和佛罗里达州立大学的科学家计划在该横除该样品上收集和特征气溶胶和降雨样本，并向社区分发样品。 将分析以24至48小时的综合基础和基于事件的雨水样品收集的大量和尺寸分级的气溶胶样品，以获取微量元素和同位素（TEIS），以量化其大气输入。 要分析的TEI将是铝，钒，铬，铁，钴，镍，铜，锌，镉，镉，铅和铅，以及主要的离子钠，镁，镁，钾，钙，钙，硝酸盐，硝酸盐，磷酸盐，磷酸盐，氯和荧光。 作为本研究的一部分进行的其他努力包括（1）气溶胶浸出，以确定海水溶解和超纯水 - 溶解的TEI分数：（2）确定海水溶解铁的尺寸分馏和氧化还原的形成：（3）获得来自其他Geotraces Scientist的水柱的子类样品的综合基础，以解释TEIS的其他氛围，以解释TEIS的氛围，以帮助分析TEIS的氛围。 （4）与其他机构的研究人员合作，以表征和约束大气沉积的估计。该项目将通过建立分数气溶胶溶解度并更好地量化全球海洋中的沉积范围来实现Geotraces计划的整体目标。作为该项目的一部分，将为阿拉斯加大学的一名研究生提供支持和培训。 阿拉斯加大学的科学家依靠邮轮博客，电子邮件和项目网站更新，计划继续与阿拉斯加，亚利桑那州和佛罗里达州的学生进行互动，该研究的结果将被纳入课堂课程，并通过公共外展和网络传播进行分发。