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

佛罗里达州立大学、夏威夷大学和华盛顿大学的科学家们将在印度洋（I8S/I9N、I6S、I7N或S4P）巡航，继续CLIVAR/CO2重复水文项目的痕量金属组成部分。研究人员将使用他们的清洁玫瑰花/GoFlo系统在1英尺的间距（12到1000米的深度）收集痕量金属剖面。这些样品将在船上用流动注射分析法分析溶解的铝和铁。将收集子样品并进行酸化，使用同位素稀释电感耦合等离子体质谱（ICPMS）和/或标准添加物ICPMS对溶解的Mn， Fe, Co, Ni, Cu, Zn， Cd和Pb进行岸上分析。这些样品的胶体部分将使用切向流超滤（1000Da）获得，低分子量部分将分析Al， Mn, Fe, Co, Ni, Cu, Zn， Cd和Pb。此外，悬浮物过滤器将分析颗粒Al， Fe和其他微量元素。除海水样品外，气溶胶样品也将使用MOUDI（微孔均匀沉积冲击器）级联冲击器收集，获得分级气溶胶样品，分析气溶胶总Al和Fe，超纯水溶气溶胶Al， Fe等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盆地尺度剖面结果与总微量元素和可溶性气溶胶微量元素数据相结合，将提高我们对全球海洋生物地球化学循环的认识，并提高海洋/大气耦合碳循环模型的预测能力。来自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将作为该项目的一部分得到支持和培训。

OCE-0648397Scientists 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.