GEOTRACES: Intercalibration for Aerosol Sampling and Analysis

大气沉降是低溶解度微量元素及其同位素（TEI）从大陆向海洋表面沃茨迁移的一种重要方式，但难以量化。 对于铁、钴和锌这三种浮游植物生长所必需的微量营养素而言，大气输入可能是维持表层沃茨中这些金属的生物必需浓度的关键途径。 来自佛罗里达州立大学的一名研究人员计划确保收集和分析气溶胶和雨水样本，作为GEOTRACES计划的一部分。 为此，他建议购置必要的设备，即一个大容量采样器，用于收集低空白过滤器矩阵上的总气溶胶和粒度分级气溶胶，以及一个自动雨水采样系统，用于收集大量未经过滤和过滤的雨水。 此外，提议者建议制定必要的协议，以便在GEOTRACES相互校准工作期间准确和精确地收集气溶胶/雨水样本并对其进行痕量金属分析。 所获得的系统将可用于随后的GEOTRACES研究巡航，这些系统可以进行二次采样，并与世界各地的同事共享。 在更广泛的影响方面，将编写一份大气取样和分析操作手册，供国家和国际科学界使用。 作为该项目的一部分，一名博士后将得到支持和培训，学生也将被纳入研究。

ABSTRACTOCE-0752832ABSTRACTOCE-0752832Atmospheric deposition is an important, but poorly quantified, mode of transport of low-solubility trace elements and their isotopes (TEI) from the continents to the surface waters of the ocean. For iron, cobalt, and zinc, three essential micronutrients for phytoplankton growth, atmospheric inputs may be the critical pathway for maintaining biologically necessary concentrations of the metals in surface waters. An investigator from Florida State University plans to ensure that aerosols and rainwater samples are collected and analyzed as part of the GEOTRACES Program. To this end, he proposes to acquire the necessary equipment, namely a high-volume sampler for the collection of total aerosols and size-fractionated aerosols on low-blank filter matrices, as well as an automated rainwater sampling system for the collection of large volumes of unfiltered and filtered rainfall. In addition, the proponent proposes develop the necessary protocols to accurately and precisely collect aerosol/rainwater samples and analyze them for trace metals during the GEOTRACES intercalibration effort. The acquired systems would be made available for deployment on subsequent GEOTRACES research cruises and the systems can be subsampled and these shared with colleagues around the world. In terms of broader impacts, a manual on the how-to's of atmospheric sampling and analyses would be produced for use by the national and international science community. One postdoc would be supported and trained as part of this project, and students would also be included in the study.