SGER: New and Improved Methods for Collecting Ocean Particulates for the GEOTRACES Community

定量颗粒分布对于理解控制溶解分布的化学、生物和物理过程至关重要。因此，海洋粒子的采样是GEOTRACES程序的一个重要考虑因素。伍兹霍尔海洋研究所（Woods Hole Oceanographic Institution）的一名科学家将利用这笔探索性研究（SGER）小额赠款，建立一个新的大容量泵送系统，能够通过过滤器在所有海洋深度取样1000L的体积。与现有系统相比，该系统能够在同一深度部署多达8台McLane原位电池供电泵，其动力在于能够在更短的时间内获得大量的海洋颗粒，并且具有更高的可重复性。有了这个SGER，研究人员还计划评估哪种过滤器最适合分析最多数量的微量元素和同位素（TEIs），并评估负载/流量对颗粒收集的影响。此外，将使用新设计的痕量金属清洁切割模板对过滤器进行次采样，并将样品分发给国家和国际GEOTRACES社区，以分析tei。最后，将使用新系统进行几次铸造，将该系统获得的结果与使用MULVFS泵送系统收集的结果进行比较。

Quantifying particle distributions is essential to understanding the chemical, biological and physical processes controlling dissolved distributions. Thus sampling of oceanic particles is an important consideration for the GEOTRACES program. A scientist from Woods Hole Oceanographic Institution would use this Small Grant for Exploratory Research (SGER) to build a new, large volume pumping system capable of sampling 1000L volumes through filters at all ocean depths. The impetus for this trace metal clean pump rosette capable of deploying up to eight McLane in-situ battery powered pumps at the same depth is the acquisition of large quantities of marine particles with greater reproducibility and within a shorter time frame relative to currently available systems. With this SGER, the researcher also plans to evaluate which filters are best suited for the analysis of the largest number of trace elements and isotopes (TEIs) and assess the impact of loading/flow on particle collection. In addition, filters would be subsampled using a newly designed trace metal clean cutting template and the samples distributed to the national and international GEOTRACES community for analyses of TEIs. Lastly, several casts would be carried out with the new system to compare results obtained with this system with those collected using the MULVFS pumping system.