GEOTRACES: Intercalibration for Aerosol Sampling and Analysis

大气沉积是低溶解度微量元素及其同位素（TEI）从大陆到海洋表层水的一种重要的、但缺乏量化的运输方式。对于浮游植物生长必需的三种微量元素铁、钴和锌来说，大气输入可能是维持地表水中生物必需的金属浓度的关键途径。佛罗里达州立大学的一名研究人员计划确保气溶胶和雨水样本被收集和分析，作为GEOTRACES项目的一部分。为此，他建议购买必要的设备，即用于收集总气溶胶和低空白过滤基质上大小分级气溶胶的大容量采样器，以及用于收集大量未过滤和过滤的降雨的自动化雨水采样系统。此外，倡议者建议制定必要的协议，以准确和精确地收集气溶胶/雨水样本，并在GEOTRACES互校准工作期间分析其痕量金属。获得的系统将可用于随后的GEOTRACES研究巡航，这些系统可以进行抽样，并与世界各地的同事共享。就更广泛的影响而言，将编写一本关于如何进行大气取样和分析的手册，供国家和国际科学界使用。作为该项目的一部分，将支持和培训一名博士后，并将包括学生。

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.