globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2002619117
论文题名:
Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere
作者: Worman S.L.; Pratson L.F.; Karson J.A.; Schlesinger W.H.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:24
起始页码: 13283
结束页码: 13293
语种: 英语
英文关键词: Biogeochemistry ; Hydrogen ; Microbes ; Mid-Ocean Ridge ; Origins of life
Scopus关键词: hydrogen ; Article ; biogenesis ; biogeochemistry ; biomass ; biosphere ; controlled study ; lithosphere ; microbial diversity ; microorganism ; mid ocean ridge ; nonhuman ; priority journal ; sea ; subseafloor
英文摘要: Free hydrogen (H2) is a basal energy source underlying chemosynthetic activity within igneous ocean crust. In an attempt to systematically account for all H2 within young oceanic lithosphere (<10 Ma) near the Mid-Ocean Ridge (MOR), we construct a box model of this environment. Within this control volume, we assess abiotic H2 sources (∼6 × 1012 mol H2/y) and sinks (∼4 × 1012 mol H2/y) and then attribute the net difference (∼2 × 1012 mol H2/y) to microbial consumption in order to balance the H2 budget. Despite poorly constrained details and large uncertainties, our analytical framework allows us to synthesize a vast body of pertinent but currently disparate information in order to propose an initial global estimate for microbial H2 consumption within young ocean crust that is tractable and can be iteratively improved upon as new data and studies become available. Our preliminary investigation suggests that microbes beneath the MOR may be consuming a sizeable portion (at least ∼30%) of all produced H2, supporting the widely held notion that subseafloor microbes voraciously consume H2 and play a fundamental role in the geochemistry of Earth's ocean-atmosphere system. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164171
Appears in Collections:气候变化与战略

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作者单位: Worman, S.L., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States; Pratson, L.F., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States; Karson, J.A., Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, United States; Schlesinger, W.H., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States, Cary Institute of Ecosystem Studies, Millbrook, NY 12545, United States

Recommended Citation:
Worman S.L.,Pratson L.F.,Karson J.A.,et al. Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(24)
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