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

在接下来的10到12年里，来自世界各地的海洋实验室的科学家将参加GEOTRACES --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运作方式。在该项目中，将资助位于费尔班克斯的阿拉斯加大学的研究人员参加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GEOTRACES相互校准航行。在2008年5月至6月的航行中，这位主要研究员及其同事打算将他们定制的ATE/叶片铁采样器与GEOTRACES采样系统和其他水采样器进行比较，以便对溶解、胶体和颗粒痕量金属进行无污染采样。在2009年6月的航行中，该项目将调查铁结合有机配体的样本储存程序，通过提供船上测量解冻的新鲜采集海水样本和保存样本的时间序列测量，尽量减少储存假象。采样器比较研究将有助于建立？违约？美国GEOTRACES计划的抽样程序。样品储存方法研究将为在GEOTRACES计划期间进行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，并符合GEOTRACES项目的主要目标。预计该提议将产生更广泛的影响，超出国际GEOTRACES计划的范围。 这将为海洋微量元素地球化学循环在海洋生态系统和海洋碳循环中的调控作用提供重要的新认识。这种了解将有助于预测自然海洋环境和全球气候因人类活动而发生的变化，并将有助于妥善管理当前和未来的海洋资源。此外，在相互校准航行期间，拟议的采样器比较和样本储存程序研究将有助于制定在全球海洋进行大规模微量元素采样的适当方法，从而推动整个海洋学领域的发展。

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.