亚北极太平洋中铝、锰、铁、钴和铅的行为:边界清扫和时间变化

IF 1.3 4区 地球科学 Q4 OCEANOGRAPHY
Cheuk-Yin Chan, Linjie Zheng, Yoshiki Sohrin
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引用次数: 0

摘要

铝(Al)、锰(Mn)、铁(Fe)、钴(Co)和铅(Pb)是海洋中具有明显清除倾向的痕量金属。本研究介绍了 GEOTRACES 日本 KH-17-3 巡航期间获得的这五种元素在太平洋亚北极区的溶解分量(d)和可变颗粒分量(lp)的全深度分布。在西经 145°横断面上,Al、Mn、Fe 和 Co 的 d 和 lp 种类反映了来自阿拉斯加的流体供应和来自大陆架的底栖输入。我们估计,阿拉斯加附近的边界清扫区宽度约为 250 千米。沿北纬 47° 区域横断面(GEOTRACES GP02 线),我们发现西部有来自鄂霍次克海和白令海的痕量金属输入,而东部由于边界清扫作用,痕量金属输入有限。胡安-德富卡海脊的热液活动影响了最东端站点 CL-21 的深水痕量金属分布。亚北极涡旋中部 dPb 垂直剖面的时间变化突显了 2005 年至 2017 年人为 Pb 排放量的下降。北纬 47°、东经 160°的 Al、Mn 和 Fe 垂直剖面在 2011 年至 2017 年期间的时间变化显示了东日本大地震的影响。特别是,2011 年海啸和海洋环流带来了 lp 痕量金属,并通过清除作用随时间推移而减少。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The behaviour of aluminium, manganese, iron, cobalt, and lead in the subarctic Pacific Ocean: boundary scavenging and temporal changes

The behaviour of aluminium, manganese, iron, cobalt, and lead in the subarctic Pacific Ocean: boundary scavenging and temporal changes

Aluminium (Al), manganese (Mn), iron (Fe), cobalt (Co), and lead (Pb) are trace metals that exhibit significant scavenging tendencies in the oceans. This study presents the full-depth distributions of the dissolved (d) and labile particulate (lp) fractions of these five elements in the subarctic Pacific Ocean, obtained during the GEOTRACES Japan KH-17-3 cruise. Along the 145° W meridional transect, the d and lp species of Al, Mn, Fe, and Co reflected fluvial supply from Alaska and benthic input from the continental shelf. We estimated that the boundary-scavenging zone has a width of approximately 250 km off Alaska. Along the 47° N zonal transect (GEOTRACES GP02 Line), we found input of trace metals from the Okhotsk and Bering Seas in the west, contrasting to the limited input of trace metals due to boundary scavenging in the east. The hydrothermal activity of the Juan de Fuca Ridge influenced the distribution of deep-water trace metals at the easternmost station, CL-21. Temporal change in the vertical profiles of dPb in the middle of the subarctic gyre highlighted a decline in anthropogenic Pb emissions from 2005 to 2017. Temporal change of the vertical profiles of Al, Mn, and Fe at 47° N, 160° E from 2011 to 2017 indicates the influence of the Great East Japan Earthquake. In particular, lp trace metals were brought by tsunami and ocean circulation in 2011, and decreased over time through scavenging.

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来源期刊
Journal of Oceanography
Journal of Oceanography 地学-海洋学
CiteScore
3.50
自引率
13.00%
发文量
42
审稿时长
6-12 weeks
期刊介绍: The Journal of Oceanography is the official journal of the Oceanographic Society of Japan and open to all oceanographers in the world. The main aim of the journal is to promote understandings of ocean systems from various aspects including physical, chemical, biological, geological oceanography as well as paleoceanography, etc. The journal welcomes research focusing on the western North Pacific and Asian coastal waters, but the study region is not limited to the Asian Pacific. The journal publishes original articles, short contributions, reviews, and correspondence in oceanography and related fields.
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