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

量化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，对海洋微粒进行取样是GEOTRACES计划的一个重要考虑因素。 来自伍兹霍尔海洋研究所的一位科学家将利用这笔探索性研究小额赠款（SGER）建造一个新的大容量泵送系统，该系统能够在所有海洋深度通过过滤器采样1000 L体积。 这种能够在相同深度部署多达8个McLane原位电池供电泵的痕量金属清洁泵花的动力是，相对于目前可用的系统，以更高的再现性和更短的时间范围内获得大量的海洋颗粒。 有了这个SGER，研究人员还计划评估哪些过滤器最适合分析最大数量的微量元素和同位素（TEI），并评估负载/流量对颗粒收集的影响。 此外，将使用新设计的微量金属清洁切割模板对过滤器进行二次取样，并将样品分发给国家和国际GEOTRACES界，用于分析TEI。 最后，将使用新系统进行几次铸造，以将使用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.