Biogeochemical Cycling and Air-Sea Exchange of Mercury in the Equatorial and South Atlantic

该项目是作为政府间海洋学委员会（IOC）海洋痕量金属基线研究的一部分提出的。主要目标是获得赤道和南大西洋水域和大气中汞的分布、形态和生物地球化学循环所需的数据。实地方案将在1996年5月/ 6月期间由R.V. Knorr号的海洋学委员会巡航到西大西洋的这些地区进行。这项研究包括船上收集空气和水中的总汞、颗粒汞和汞种类（即活性汞、元素汞和甲基化汞），船上汞分析，以及旨在研究公海中元素汞和甲基化汞的生物和非生物来源的孵化实验。巡航后的活动将包括分析储存的样品和额外的孵化实验。这项研究旨在补充和扩展最近对北大西洋汞的调查（1993年8月），这些调查是国际海洋学委员会微量金属基线研究的一部分，以及早期对太平洋汞的研究。＊＊＊

9530059 Fitzgerald This project is proposed as part of Intergovernmental Oceanographic Commission (IOC) Baseline Trace Metal Study of the oceans. The primary objective is to obtain needed data for the distribution, speciation and biogeochemcial cycling of Hg in the waters and atmosphere of the equatorial and South Atlantic Ocean. The field program will be conducted on the IOC cruise of the R.V. Knorr to these regions in the western Atlantic during may/June 1996. The research involves shipboard collections for total Hg, particulate and Hg species (i.e., reactive, elemental and methylated Hg) in air and water, on-board Hg analyses, and incubation experiments designed to study the biotic and abiotic sources of elemental and methylated Hg in the open ocean waters. Post cruise activities will include analyses of stored samples and additional incubation experiments. This research is designed to complement and extend recent investigations of Hg in the North Atlantic Ocean (August, 1993) that were part of the IOC Baseline Trace Metal Study, and earlier Hg studies in the Pacific Ocean. ***