Comparison of Sample Collection, Preservation, and Analysis During GEOTRACES Intercalibration Cruises

GEOTRACES 相互校准巡航期间样品采集、保存和分析的比较

• 批准号: 1012188
• 负责人: Jingfeng Wu
• 金额: $ 6.97万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-22 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1012188&HistoricalAwards=false
• 关键词: Comparison; Sample; Collection; Preservation; Analysis

During the next ten to twelve years, scientists from oceanographic laboratories around the world will participate in GEOTRACES -- a benchmark effort to investigate the distribution and behavior of chemicals in the sea that can give insight into the way the ocean works as a geophysical system. In this project, researchers at the University of Alaska at Fairbanks will be funded to participate in the May-June 2008 and in the June 2009 GEOTRACES intercalibration cruises in the Sargasso Sea and the North Pacific. During the May-June 2008 cruise, this principal investigator and his colleagues intend to compare their custom-built ATE/Vane iron sampler to the GEOTRACES sampling system and other water samplers for the contamination-free sampling of dissolved, colloidal and particulate trace metals. During the June 2009 cruise, this project will investigate sample storage procedures for Fe-binding organic ligands that minimize storage artifacts by providing on-board measurements of unfrozen freshly collected seawater samples and time series measurements of preserved samples. The sampler comparison studies will help establish ?default? sampling procedures for the US GEOTRACES program. The sample storage method studies will provide confidence to carry out a global survey of trace element speciation during the GEOTRACES program. These proposed works are critical for the success of the GEOTRACES intercalibration cruises and comply with the major goals of GEOTRACES project. The proposed is expected to have broader impacts that extend beyond the international GEOTRACES program. It should provide important new insights for a variety of research activities that endeavor to understand the roles of oceanic trace element geochemical cycling in regulating marine ecosystem and the oceanic carbon cycle. Such understanding will help predict changes in natural oceanic environments and global climate due to human activities, and will help in the proper management of current and future marine resources. In addition, the proposed studies of sampler comparison and sample storage procedures, during the intercalibration cruises, will help develop proper methods for large scale trace elements sampling in the global ocean which will advance the field of oceanography in general.

在接下来的十到十二年中，来自世界各地的海洋实验室的科学家将参与地理位置，这是一个基准的努力，以调查化学物质在海中的分布和行为，从而可以深入了解海洋作为地球物理系统的工作方式。在这个项目中，阿拉斯加大学费尔班克斯大学的研究人员将资助参加2008年5月至6月的2008年5月，并在2009年6月的Sargasso Sea和北太平洋的地理界互动巡游。在2008年5月至6月的巡航期间，这位主要研究人员及其同事打算将其定制的Ate/Vane铁采样器与地理位置采样系统和其他水上采样器进行比较，以对溶解，胶体和颗粒物痕量金属进行无污染采样。在2009年6月的巡航期间，该项目将调查用于结合有机配体的样品存储程序，这些配体通过提供未开采的新鲜收集的海水样品和时间序列测量的保留样品的板载测量，以最大程度地减少存储伪像。采样器比较研究将有助于建立默认值？美国Geotraces计划的采样程序。样本存储方法研究将提供信心，以对GEOTRACES计划期间对痕量元素物种形成进行全球调查。这些提出的作品对于地理位置互动巡航的成功至关重要，并遵守Geotraces项目的主要目标。预计拟议的会产生更广泛的影响，超出了国际地理计划。 它应该为各种研究活动提供重要的新见解，以努力了解海洋痕量元素地球化学循环在调节海洋生态系统和海洋碳循环中的作用。这种理解将有助于预测由于人类活动而导致的自然海洋环境和全球气候的变化，并有助于对当前和未来的海洋资源进行适当的管理。此外，在插图巡航过程中，提议的采样器比较和样品存储程序的研究将有助于开发适当的方法，以在全球海洋中进行大规模痕量元素采样，从而推进一般海洋学领域。