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

在接下来的10到12年里，来自世界各地海洋学实验室的科学家们将参加GEOTRACES项目，这是一项调查海洋中化学物质分布和行为的基准工作，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分校的研究人员将获得资助，参加2008年5月至6月和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月的巡航期间，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，以对溶解、胶体和颗粒微量金属进行无污染采样。在2009年6月的巡航期间，该项目将研究铁结合有机配体的样品储存程序，通过提供船上未冷冻的新鲜海水样品的测量和保存样品的时间序列测量，最大限度地减少储存误差。抽样比较研究将有助于确定“违约”。美国GEOTRACES程序的抽样程序。样品储存方法的研究将为GEOTRACES项目开展全球微量元素形态调查提供信心。这些建议的工作对于GEOTRACES互校准巡航的成功至关重要，并且符合GEOTRACES项目的主要目标。该提议预计将产生比国际GEOTRACES项目更广泛的影响。这将为进一步认识海洋微量元素地球化学循环对海洋生态系统和海洋碳循环的调控作用提供重要的新思路。这种认识将有助于预测由于人类活动而引起的海洋自然环境和全球气候的变化，并将有助于对当前和未来海洋资源的适当管理。此外，在互定标巡航期间提出的取样器比较和样品储存程序的研究将有助于在全球海洋中制定大规模微量元素取样的适当方法，这将推动海洋学领域的发展。

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.