Collaborative Research: Global Ocean Survey of Dissolved and Particulate Iron and Aluminum and Aerosol Iron and Aluminum Solubility Supporting the CLIVAR/Repeat Hydrography Project

一名来自佛罗里达州立大学的科学家和一名来自夏威夷大学的科学家将参加CLIVAR重复水文方案的最后两次航行，对具有特别海洋学意义的海洋关键区域进行采样，以前在该方案期间没有进行过采样。 第一个断面将是2011年的S4 P断面，将在东经160°至西经110°之间的一个通常无法进入的大面积高营养低叶绿素区（HNLC）进行采样，并包括进入南极沿海沃茨的至少三个纬向断面，以及在南纬67°附近沿着一个纬向断面进行采样。 第二部分是在南纬3°至55°之间重新占领A16 S，目前计划于2013年完成，并将完成大西洋部分。 将在CLIVAR常规团队所占用的大约每隔一个站点收集水样，取样深度为12至1000米。 这些样本将在船上进行溶解铁和铝、营养物质和盐度的分析。 将在海岸储存、酸化其他样品，并使用电感耦合等离子体质谱法（ICP-MS）分析锰、铁、钴、镍、铜、锌、镉和铅。 与美国GEOTRACES指导委员会合作，将收集海水样本，由其他调查人员在岸上测定其他微量元素和同位素。 此外，研究人员计划继续使用现有的CLIVAR气溶胶和降雨采样设备，以及最近购买的用于美国GEOTRACES计划的大容量气溶胶采样设备和自动降雨收集器，进行每日集成气溶胶和基于事件的降雨采样。 这将使我们能够向美国和国际“气溶胶社区”提供子样本。 气溶胶样品将使用岸基ICP-MS分析超纯水可溶性、海水可溶性和总微量元素。（对于体积大于200 mL的样品），过滤和未过滤的子样品将冷冻储存，用于岸基主要离子分析和ICP-MS痕量元素分析。至于更广泛的影响，作为CLIVAR Repeat Hydrography计划的一部分，获得的痕量金属数据集的可用性将促进我们对全球地球化学循环的了解，并将改进耦合地球化学模型。 研究结果将纳入课堂讲座。 作为本项目的一部分，将支持和培训来自佛罗里达州立大学的一名博士后和一名研究生以及来自夏威夷大学的两名博士后。

A scientist from Florida State University and one from the University of Hawaii will participate in the final two cruises of the CLIVAR Repeat Hydrography program to sample critical regions of the oceans of particular oceanographic significance and have not been previously sampled during this program. The first section will be S4P in 2011 which will sample a large normally inaccessible High Nutrient Low Chlorophyll (HNLC) region between 160°E and 110°W and involve at least three meridional sections into Antarctic coastal waters as well sampling along a zonal transect at roughly 67°S. The second section is the reoccupation of A16S between ~3°S and 55° S, currently scheduled for 2013 and will complete the Atlantic section. Water samples will be collected at approximately every other station occupied by the regular CLIVAR team, sampling 12 depths to 1000m. The samples will be analyzed on-board for dissolved iron and aluminum, nutrients, and salinity. Additional samples will be stored, acidified, and analyzed on shore for manganese, iron, cobalt, nickel, copper, zinc, cadmium, and lead using inductively coupled plasma mass spectrometry (ICP-MS). In collaboration with the U.S. GEOTRACES steering committee, seawater samples will be collected for shore-based determination of other trace elements and isotopes by other investigators. In addition, the researchers plan to continue the daily-integrated aerosol and event-based rainfall sampling, using existing CLIVAR aerosol and rainfall sampling equipment, as well as the high-volume aerosol sampling equipment and automated rainfall collectors recently purchased for use in the U.S. GEOTRACES program. This will allow us to provide subsamples to the U.S. and international "aerosol community". The aerosol samples will be analyzed for ultrapure water soluble, seawater soluble, and total trace elements using shore-based ICP-MS. Rain samples will be filtered (for samples greater than 200mL volume) and filtered and unfiltered subsamples will be stored frozen for shore-based major ion analyses and ICP-MS trace element analysis.As regards broader impacts, availability of the trace metal dataset acquired as part of the CLIVAR Repeat Hydrography program will advance our knowledge of global biogeochemical cycles and will improve coupled biogeochemical models. Results from the study would be included into class lectures. One postdoc and one graduate student from Florida State University and two postdoc from the University of Hawaii will be supported and trained as part of this project.