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DOI | 10.1029/2021GL095680 |
Stable barium isotope dynamics during estuarine mixing | |
Zhimian Cao; Xinting Rao; Yang Yu; Christopher Siebert; Ed C. Hathorne; Bo Liu; Guizhi Wang; Ergang Lian; Zhibing Wang; Ruifeng Zhang; Lei Gao; Gangjian Wei; Shouye Yang; Minhan Dai; Martin Frank | |
2021-09-15 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Stable barium isotopes are a potential proxy for riverine inputs into the ocean that reflect monsoon variability and climate change. However, dissolved Ba isotope (δ138BaDBa) geochemistry in river estuaries, a dynamic land to ocean transition zone, has rarely been systematically examined to date. Here we show that significant Ba isotope fractionation occurs at near-zero salinities in the Yangtze and Pearl River Estuary, whereas conservative mixing dominates δ138BaDBa distributions beyond low salinities, which are well predicted by an ion exchange model. Elevated δ138BaDBa in the river endmember results from preferential removal of light Ba isotopes by adsorption to fluvial particles. Subsequently, δ138BaDBa rapidly drops to minimum signatures at increased salinities indicating particle desorption of isotopically light Ba. Nevertheless, the apparently conservative δ138BaDBa-salinity relationship beyond the low-salinity minimum in both estuaries provides a modern calibration for using Ba isotopes as a proxy for paleosalinity and river water inputs into the ocean. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/338702 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Zhimian Cao,Xinting Rao,Yang Yu,et al. Stable barium isotope dynamics during estuarine mixing[J]. Geophysical Research Letters,2021. |
APA | Zhimian Cao.,Xinting Rao.,Yang Yu.,Christopher Siebert.,Ed C. Hathorne.,...&Martin Frank.(2021).Stable barium isotope dynamics during estuarine mixing.Geophysical Research Letters. |
MLA | Zhimian Cao,et al."Stable barium isotope dynamics during estuarine mixing".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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