DOI: 10.1002/2015GL065658
论文题名: An abyssal hill fractionates organic and inorganic matter in deep-sea surface sediments
作者: Turnewitsch R. ; Lahajnar N. ; Haeckel M. ; Christiansen B.
刊名: Geophysical Research Letters
ISSN: 0094-9623
EISSN: 1944-9354
出版年: 2015
卷: 42, 期: 18 起始页码: 7663
结束页码: 7672
语种: 英语
英文关键词: abyssal hill
; abyssal mountain
; amino acid
; benthos
; carbon
; fluid dynamics
Scopus关键词: Amino acids
; Biogeochemistry
; Carbon
; Fluid dynamics
; Landforms
; Organic carbon
; Surface waters
; Surficial sediments
; abyssal hill
; abyssal mountain
; benthos
; Carbon and nitrogen
; Coarse-grained sediments
; Deep ocean sediments
; Organic matter preservations
; Proteinaceous materials
; Sediments
; abyssal zone
; amino acid
; benthos
; deep sea
; fluid dynamics
; fractionation
; mountain environment
; organic carbon
; organic nitrogen
; preservation
; seafloor
; sediment chemistry
; surficial sediment
英文摘要: Current estimates suggest that more than 60% of the global seafloor are covered by millions of abyssal hills and mountains. These features introduce spatial fluid-dynamic "granularity" whose influence on deep-ocean sediment biogeochemistry is unknown. Here we compare biogeochemical surface-sediment properties from a fluid-dynamically well-characterized abyssal hill and upstream plain: (1) In hill sediments, organic-carbon and -nitrogen contents are only about half as high as on the plain while proteinaceous material displays less degradation; (2) on the hill, more coarse-grained sediments (reducing particle surface area) and very variable calcite contents (influencing particle surface charge) are proposed to reduce the extent, and influence compound-specificity, of sorptive organic-matter preservation. Further studies are needed to estimate the representativeness of the results in a global context. Given millions of abyssal hills and mountains, their integrative influence on formation and composition of deep-sea sediments warrants more attention. © 2015 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945205327&doi=10.1002%2f2015GL065658&partnerID=40&md5=8e74ed484c9ee9507f92ce58a723486d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9238
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Scottish Association for Marine Science, Oban, United Kingdom
Recommended Citation:
Turnewitsch R.,Lahajnar N.,Haeckel M.,et al. An abyssal hill fractionates organic and inorganic matter in deep-sea surface sediments[J]. Geophysical Research Letters,2015-01-01,42(18).