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DOI | 10.1038/s41467-019-13741-x |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf | |
[unavailable] | |
2019-12-19 | |
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 | Recent recession of the Larsen Ice Shelf C has revealed microbial alterations of illite in marine sediments, a process typically thought to occur during low-grade metamorphism. In situ breakdown of illite provides a previously-unobserved pathway for the release of dissolved Fe2+ to porewaters, thus enhancing clay-rich Antarctic sub-ice shelf sediments as an important source of Fe to Fe-limited surface Southern Ocean waters during ice shelf retreat after the Last Glacial Maximum. When sediments are underneath the ice shelf, Fe2+ from microbial reductive dissolution of illite/Fe-oxides may be exported to the water column. However, the initiation of an oxygenated, bioturbated sediment under receding ice shelves may oxidize Fe within surface porewaters, decreasing dissolved Fe2+ export to the ocean. Thus, we identify another ice-sheet feedback intimately tied to iron biogeochemistry during climate transitions. Further constraints on the geographical extent of this process will impact our understanding of iron-carbon feedbacks during major deglaciations. |
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/232487 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | [unavailable]. Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf[J]. Nature Communications,2019,10. |
APA | [unavailable].(2019).Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf.Nature Communications,10. |
MLA | [unavailable]."Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf".Nature Communications 10(2019). |
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