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: 0728390
• 负责人: Jingfeng Wu
• 金额: --
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0728390&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里，来自世界各地海洋学实验室的科学家将参与 GEOTRACES，这是一项研究海洋中化学物质分布和行为的基准项目，可以深入了解海洋作为地球物理系统的运作方式。在该项目中，阿拉斯加大学费尔班克斯分校的研究人员将获得资助参加 2008 年 5 月至 6 月以及 2009 年 6 月在马尾藻海和北太平洋进行的 GEOTRACES 相互校准巡航。在 2008 年 5 月至 6 月的航行中，这位首席研究员和他的同事打算将他们定制的 ATE/Vane 铁采样器与 GEOTRACES 采样系统和其他水采样器进行比较，以实现对溶解、胶体和颗粒痕量金属的无污染采样。在 2009 年 6 月的航行期间，该项目将研究铁结合有机配体的样品存储程序，通过提供未冷冻的新鲜收集的海水样品的船上测量和保存样品的时间序列测量来最大限度地减少存储伪影。采样器比较研究将有助于建立“默认”。美国 GEOTRACES 计划的采样程序。样品储存方法研究将为 GEOTRACES 计划期间开展全球微量元素形态调查提供信心。这些拟议的工作对于 GEOTRACES 相互校准巡航的成功至关重要，并且符合 GEOTRACES 项目的主要目标。该提案预计将产生更广泛的影响，超越国际 GEOTRACES 计划。 它应该为努力了解海洋微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的各种研究活动提供重要的新见解。这种认识将有助于预测人类活动导致的自然海洋环境和全球气候的变化，并有助于正确管理当前和未来的海洋资源。此外，在相互校准巡航期间对采样器比较和样本存储程序进行的拟议研究将有助于开发全球海洋中大规模微量元素采样的适当方法，这将总体上推动海洋学领域的发展。