DOI: 10.1007/s00531-012-0839-3
Scopus记录号: 2-s2.0-84908572937
论文题名: Quantification of methane emission from bacterial mat sites at Quepos Slide offshore Costa Rica
作者: Karaca D. ; Schleicher T. ; Hensen C. ; Linke P. ; Wallmann K.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 7 起始页码: 1817
结束页码: 1829
语种: 英语
英文关键词: Bacterial mats
; Central American margin
; Fluid seepage
; Methane
; Reactive-transport modeling
; Submarine landslide
Scopus关键词: carbon emission
; dissolved organic carbon
; geological mapping
; methane
; microbial mat
; quantitative analysis
; reactive transport
; seafloor
; seepage
; submarine landslide
; water column
; Bacteria (microorganisms)
英文摘要: Seafloor methane emission from the Quepos Slide on the submarine segment of the Costa Rica fore-arc margin was estimated by extrapolating flux measurements from individual seeps to the total area covered by bacterial mats. This approach is based on the combination of detailed mapping to determine the abundance of seeps and the application of a numerical model to estimate the amount of benthic methane fluxes. Model results suggest that the majority of the studied seeps transport rather limited amount of methane (on average: ~177 μmol cm−2 a−1) into the water column due to moderate upward advection, allowing for intense anaerobic oxidation of methane (AOM; on average: 53 % of the methane flux is consumed). Depth-integrated AOM rates (56–1,538 μmol CH4 cm−2 a−1) are comparable with values reported from other active seep sites. The overall amount of dissolved methane released into the water column from the entire area covered by bacterial mats on the Quepos Slide is estimated to be about 0.28 × 106 mol a−1. This conservative estimate which relies on rather accurate determinations of seafloor methane fluxes emphasizes the potential importance of submarine slides as sites of natural methane seepage; however, at present the global extent of methane seepage from submarine slides is largely unknown. © 2012, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908572937&doi=10.1007%2fs00531-012-0839-3&partnerID=40&md5=420d0343d88ca73dcbdf189ff37756ff
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70425
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Collaborative Research Center (SFB) 574, GEOMAR, Helmholz Centre for Ocean Research Kiel, Wischhofstraße 1-3, Kiel, Germany; Department of Bioinformatics, University of Würzburg, Am Hubland, Würzburg, Germany; Helmholtz Centre for Ocean Research Kiel (GEOMAR), Wischhofstraße 1-3, Kiel, Germany
Recommended Citation:
Karaca D.,Schleicher T.,Hensen C.,et al. Quantification of methane emission from bacterial mat sites at Quepos Slide offshore Costa Rica[J]. International Journal of Earth Sciences,2014-01-01,103(7)