Biogeochemical Cycling of Mercury in the North Atlantic Ocean

主题：北大西洋汞的生物地球化学循环 海洋 这项研究将调查物种形成，分布和 北大西洋汞的地球化学循环。海洋 是大气汞的重要源和汇， 在全球汞循环中发挥重要作用。行为知识 汞在海洋环境中的命运受到缺乏 公海中汞的分布和形态信息 地区政府间海洋学委员会（IOC） 在C.S.S.上进行基线跟踪金属巡航。哈德逊6月/7月 1993年将提供必要的数据，以及支持 化学和物理海洋学计划，以补充和 扩展了以前对汞的海洋研究，特别是 富饶的赤道太平洋船上分析将 为活性汞，和溶解的气体物种（汞程度和 二甲基汞）。 将对总汞、 参与汞和单甲基汞。 研究将集中在 甲基化汞物种和元素汞的分布， 努力查明这些污染物的主要源和汇 海洋表层和深海中的化合物获得的数据将 允许测试目前关于来源的假设， 公海沃茨水域中汞物种的命运，并将扩大 了解海洋在全球汞循环中的作用。

Subject: Biogeochemical Cycling of Mercury In The North Atlantic Ocean This research will investigate the speciation, distribution and biogeochemical cycling of Hg in the North Atlantic Ocean. The ocean is an important source and sink for atmospheric Hg, and plays a significant role in the global Hg cycle. Knowledge of the behavior and fate of Hg in the marine environment is hindered by the lack of information on the distribution and speciation of Hg in open ocean regions. The Intergovernment Oceanographic Commission (IOC) Baseline Trace Metal cruise aboard the C.S.S. Hudson in June/July 1993 will provide essential data, as well as the supporting chemical and physical oceanographic program, to complement and extend previous oceanic studies of Hg, particularly those in the productive equatorial Pacific Ocean. Shipboard analyses will be made for reactive Hg, and dissolved gaseous species (Hg degree and dimethylHg). Post cruise analyses will be conducted for total Hg, participate Hg, and for monomethylHg. The research will focus on the distribution of methylated Hg species and elemental Hg in an effort to ascertain the principal sources and sinks for these compounds in the surface and deep ocean. The data obtained will allow the testing of current hypotheses concerning the sources and fate of Hg species in open ocean waters, and will broaden the understanding of the role of the ocean in the global Hg cycle.