US GEOTRACES North Atlantic Section: Dissolved Iron and Iron(II)

美国 GEOTRACES 北大西洋部分：溶解铁和铁(II)

• 批准号: 0927285
• 负责人: Peter Sedwick
• 金额: $ 35万
• 依托单位: Old Dominion University Research Foundation
• 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: 2010-03-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0927285&HistoricalAwards=false
• 关键词: US; GEOTRACES; North; Atlantic; Section

GEOTRACES is an international program which aims at identifying processes and quantifying fluxes that control the distributions of key trace elements and isotopes in the ocean, and at establishing the sensitivity of these distributions to changing environmental conditions. Iron (Fe) plays a key role in phytoplankton growth and composition yet our knowledge of the distribution of this element in the ocean and the processes that influence its observed distribution remain poorly quantified. To further our understanding of Fe in the marine environment, a scientist from Old Dominion University plans to analyze water column and surface water samples for dissolved Fe and Fe(II) using high throughput flow injection analysis during the upcoming 2010 GEOTRACES cruise to the North Atlantic Ocean basin. In addition, following the cruise, the samples will be analyzed again using both the flow injection method and high resolution inductively coupled plasma mass spectrometry to assess the effects of sample storage and to ascertain the accuracy of their shipboard measurements. Results from this research will facilitate the inclusion of iron in biogeochemical models of the marine ecosystem and improve scientists' ability to predict how the ocean will respond to future climate change. This study represents a collaborative effort between a scientist at a U.S. institution and the University of Tasmania. It is anticipated that results from the study would be incorporated into class lecture material for graduate and undergraduate courses at Old Dominion University. One graduate student would be supported and trained as part of this project.

GeoTraces是一个国际计划，旨在识别控制关键痕量元素和海洋中关键痕量要素和同位素分布的过程，并确定这些分布对不断变化的环境条件的敏感性。 铁（FE）在浮游植物生长和组成中起着关键作用，但我们对这一元素在海洋中的分布以及影响其观察到的分布的过程的了解仍然很差。为了进一步了解我们对海洋环境中的FE的理解，旧自治领大学的科学家计划在即将到来的2010年Geotraces在北大西洋盆地巡游中使用高吞吐量流量注射分析来分析溶解的Fe和Fe（II）的水柱和地表水样品。 此外，在巡航之后，将同时使用流量注入方法和高分辨率对样品进行分析，以评估样品存储的效果并确定其船上测量的准确性。 这项研究的结果将有助于将铁包含在海洋生态系统的生物地球化学模型中，并提高科学家预测海洋将如何应对未来气候变化的能力。 这项研究代表了美国机构与塔斯马尼亚大学的科学家之间的合作努力。 预计该研究的结果将被纳入旧自治领大学的研究生和本科课程的课堂演讲材料中。 作为该项目的一部分，将为一名研究生提供支持和培训。