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

在接下来的10到12年里，来自世界各地海洋实验室的科学家将参与GEOTRACES--一项基准努力，调查化学物质在海洋中的分布和行为，从而深入了解海洋作为地球物理系统的工作方式。在这一项目中，将资助阿拉斯加大学费尔班克斯分校的研究人员参加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地球观测系统间校准巡航。在2008年5月至6月的邮轮上，这位首席研究员和他的同事们打算将他们定制的ATE/Vane铁采样器与GEOTRACES采样系统和其他水样采样器进行比较，以实现对溶解、胶体和微粒痕量金属的无污染采样。在2009年6月的巡航期间，该项目将调查铁结合有机配体的样品存储程序，通过提供未冷冻的新收集的海水样品的船上测量和保存样品的时间序列测量，最大限度地减少存储人工制品。采样器比较研究将有助于确定？默认？美国GEOTRACES计划的抽样程序。样品储存方法研究将为在GEOTRACES方案期间开展全球微量元素形态调查提供信心。预计拟议中的影响将超出国际GEOTRACES计划的范围。此外，在定标巡航期间对采样器比较和样品存储程序的拟议研究将有助于发展适合于全球海洋大规模微量元素采样的适当方法，这将推动海洋学领域的整体发展。

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.