Depto. Geoquímica, Universidade Federal Fluminense, Outeiro São João Batista s/n, Centro, Niterói, RJ CEP 24020-141, Brazil.
Mar Pollut Bull. 2013 Nov 15;76(1-2):389-93. doi: 10.1016/j.marpolbul.2013.07.049. Epub 2013 Aug 21.
To investigate the upwelling influence on Hg biogeochemical cycles and the sedimentological changes during the previous ≈ 150 years, four sediment box-cores were sampled along an inshore offshore transect on the Southeastern Brazilian continental shelf. Mercury values were found to be relatively low, with means ranging between 8.08 and 30.4 ng g(-1). Mercury fluxes along the sediment cores are directly related to the well documented historical regional activity and global atmospheric deposition. The narrow relationship between mercury and organic carbon suggest that upwelling phenomenon and primary production may play an important role on Hg input and distribution along continental shelf depositional settings.
为了研究上升流对汞生物地球化学循环和过去约 150 年期间沉积变化的影响，在东南巴西南部大陆架的一条近岸-远岸的横断线上采集了四个沉积物箱芯。发现汞值相对较低，平均值在 8.08 到 30.4ng/g 之间。沉积物芯中的汞通量与有充分记录的区域历史活动和全球大气沉积直接相关。汞与有机碳之间的密切关系表明，上升流现象和初级生产力可能对汞在大陆架沉积环境中的输入和分布起着重要作用。
