Collaborative Research: Global Ocean Survey of Dissolved Iron and Aluminum and Aerosol Iron and Aluminum Solubility Supporting the CLIVAR Repeat Hydrography Project (2007-2009).

来自佛罗里达州立大学、夏威夷大学和华盛顿大学的科学家将继续在印度洋（I8 S/I9 N、I6 S、I7 N或S4 P）进行CLIVAR/CO2重复水文方案的痕量金属部分。 研究人员将使用他们的干净玫瑰花结/GoFlo系统以1'的间距（12个深度到1000米）收集痕量金属剖面。 将使用流动注射分析法在船上分析这些样品的溶解铝和铁。 将收集子样本并酸化，使用同位素稀释电感耦合等离子体质谱法（ICPMS）和/或标准添加ICPMS对溶解的锰、铁、钴、镍、铜、锌、镉和铅进行岸基分析。 将使用切向流超滤（1000 Da）获得这些样品的胶体部分，并分析低分子量部分中的Al、Mn、Fe、Co、Ni、Cu、Zn、Cd和Pb。 此外，还将分析悬浮物过滤器中的颗粒铝、铁和其他微量元素。 除海水样品外，还将使用MOUDI（微孔均匀存款撞击器）级联撞击器收集气溶胶样品，以获得粒度分级的气溶胶样品，这些样品将用于分析总气溶胶Al和Fe，以及超纯水溶性气溶胶Al、Fe、其他微量元素和主要离子。 就更广泛的影响而言，溶解和颗粒微量元素的流域尺度部分与总的和可溶性气溶胶微量元素数据相结合的结果将提高我们对全球海洋生物地球化学循环的理解，以及提高耦合海洋/大气碳循环模型的预测能力。 作为本项目的一部分，将支助和培训佛罗里达州立大学的两名研究生、夏威夷大学的一名博士后和一名研究生以及华盛顿大学的一名研究生。

OCE-0649505Scientists from Florida State University, the University of Hawaii, and the University of Washington will continue the trace metal component of the CLIVAR/CO2 Repeat Hydrography Program with cruises in the Indian Ocean (I8S/I9N, I6S, I7N or S4P). The researchers will use their clean rosette/GoFlo system to collect trace metal profiles at 1' spacing (12 depths to 1000 m). These samples will be analyzed on board for dissolved Al and Fe using Flow Injection Analysis. Subsamples will be collected and acidified for shore-based analysis of dissolved Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb using either isotope dilution inductively coupled plasma mass spectrometry (ICPMS) and/or standard additions ICPMS. The colloidal fraction of these samples will be obtained using tangential flow ultrafiltration (1000Da) and the low molecular weight fraction will be analyzed for Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb. In addition, suspended matter filters will be analyzed for particulate Al, Fe, and other trace elements. Besides seawater samples, aerosol samples also will be collected using a MOUDI (micro-orifice uniform deposit impactor) cascade impactor to obtain size-fractionated aerosol samples that will be analyzed for total aerosol Al and Fe, and ultrapure water soluble aerosol Al, Fe, other trace elements, and major ions. In terms of broader impacts, results from basin scale sections of dissolved and particulate trace elements combined with the total and soluble aerosol trace element data will improve our understanding of global ocean biogeochemical cycles, as well as improve the predictive capabilities of coupled ocean/atmospheric carbon cycle models. Two graduate students from Florida State University, one post-doc and one graduate student from the University of Hawaii, and one graduate student from the University of Washington will be supported and trained as part of this project.