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DOI | 10.1038/s41561-018-0122-8 |
Global diffusive fluxes of methane in marine sediments | |
Egger, Matthias1,5; Riedinger, Natascha2; Mogollon, Jose M.3,4; Jorgensen, Bo Barker1 | |
2018-06-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:6页码:421-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; USA; Netherlands |
英文摘要 | Anaerobic oxidation of methane provides a globally important, yet poorly constrained barrier for the vast amounts of methane produced in the subseafloor. Here we provide a global map and budget of the methane flux and degradation in diffusion-controlled marine sediments in relation to the depth of the methane oxidation barrier. Our new budget suggests that 45-61 Tg of methane are oxidized with sulfate annually, with approximately 80% of this oxidation occurring in continental shelf sediments (< 200 m water depth). Using anaerobic oxidation as a nearly quantitative sink for methane in steady-state diffusive sediments, we calculate that similar to 3-4% of the global organic carbon flux to the seafloor is converted to methane. We further report a global imbalance of diffusive methane and sulfate fluxes into the sulfate-methane transition with no clear trend with respect to the corresponding depth of the methane oxidation barrier. The observed global mean net flux ratio between sulfate and methane of 1.4: 1 indicates that, on average, the methane flux to the sulfate-methane transition accounts for only similar to 70% of the sulfate consumption in the sulfate-methane transition zone of marine sediments. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433901600015 |
WOS关键词 | COUPLED ANAEROBIC OXIDATION ; SULFATE REDUCTION ; ORGANIC-MATTER ; BALTIC SEA ; ELECTRON-TRANSFER ; AARHUS BAY ; IRON ; DRIVEN ; BIOGEOCHEMISTRY ; DEGRADATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34775 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Aarhus Univ, Dept Biosci, Ctr Geomicrobiol, Aarhus, Denmark; 2.Oklahoma State Univ, Boones Pickens Sch Geol, Stillwater, OK 74078 USA; 3.Royal Netherlands Inst Sea Res NIOZ, Dept Marine Microbiol & Biogeochem, Texel, Netherlands; 4.Univ Utrecht, Dept Earth Sci Geochem, Utrecht, Netherlands; 5.Ocean Cleanup Fdn, Delft, Netherlands |
推荐引用方式 GB/T 7714 | Egger, Matthias,Riedinger, Natascha,Mogollon, Jose M.,et al. Global diffusive fluxes of methane in marine sediments[J]. NATURE GEOSCIENCE,2018,11(6):421-+. |
APA | Egger, Matthias,Riedinger, Natascha,Mogollon, Jose M.,&Jorgensen, Bo Barker.(2018).Global diffusive fluxes of methane in marine sediments.NATURE GEOSCIENCE,11(6),421-+. |
MLA | Egger, Matthias,et al."Global diffusive fluxes of methane in marine sediments".NATURE GEOSCIENCE 11.6(2018):421-+. |
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