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DOI | 10.1038/s41467-019-13707-z |
Glacial鈥搃nterglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet | |
[unavailable] | |
2019-12-18 | |
发表期刊 | Nature Communications |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
英文摘要 | The Nd isotope composition of seawater has been used to reconstruct past changes in the contribution of different water masses to the deep ocean. In the absence of contrary information, the Nd isotope compositions of endmember water masses are usually assumed constant during the Quaternary. Here we show that the Nd isotope composition of North Atlantic Deep Water (NADW), a major component of the global overturning ocean circulation, was significantly more radiogenic than modern during the Last Glacial Maximum (LGM), and shifted towards modern values during the deglaciation. We propose that weathering contributions of unradiogenic Nd modulated by the North American Ice Sheet dominated the evolution of the NADW Nd isotope endmember. If water mass mixing dominated the distribution of deep glacial Atlantic Nd isotopes, our results would imply a larger fraction of NADW in the deep Atlantic during the LGM and deglaciation than reconstructed with a constant northern endmember. |
领域 | 资源环境 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/232485 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | [unavailable]. Glacial鈥搃nterglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet[J]. Nature Communications,2019,10. |
APA | [unavailable].(2019).Glacial鈥搃nterglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet.Nature Communications,10. |
MLA | [unavailable]."Glacial鈥搃nterglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet".Nature Communications 10(2019). |
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