DOI: 10.1002/gbc.20071
Scopus记录号: 2-s2.0-84883164723
论文题名: Carbon burial in soil sediments from Holocene agricultural erosion, Central Europe
作者: Hoffmann T ; , Schlummer M ; , Notebaert B ; , Verstraeten G ; , Korup O
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 828
结束页码: 835
语种: 英语
英文关键词: deposition
; floodplain
; hillslope
; human impact
; soil erosion
; soil organic carbon
Scopus关键词: Flood plains
; Hillslopes
; Human impact
; Soil erosion
; Soil organic carbon
; Agriculture
; Banks (bodies of water)
; Budget control
; Carbon
; Catchments
; Deposition
; Erosion
; Lakes
; Rivers
; Sedimentology
; Sediments
; Soils
; Watersheds
; Floods
; carbon sequestration
; concentration (composition)
; deposition
; drainage network
; floodplain
; fluvial deposit
; hillslope
; Holocene
; human activity
; magnitude
; organic carbon
; river basin
; river channel
; soil erosion
; soil organic matter
; Central Europe
英文摘要: Natural and human-induced erosion supplies high amounts of soil organic carbon (OC) to terrestrial drainage networks. Yet OC fluxes in rivers were considered in global budgets only recently. Modern estimates of annual carbon burial in inland river sediments of 0.6 Gt C, or 22% of C transferred from terrestrial ecosystems to river channels, consider only lakes and reservoirs and disregard any long-term carbon burial in hillslope or floodplain sediments. Here we present the first assessment of sediment-bound OC storage in Central Europe from a synthesis of ~1500 Holocene hillslope and floodplain sedimentary archives. We show that sediment storage increases with drainage-basin size due to more extensive floodplains in larger river basins. However, hillslopes retain hitherto unrecognized high amounts of eroded soils at the scale of large river basins such that average agricultural erosion rates during the Holocene would have been at least twice as high as reported previously. This anthropogenic hillslope sediment storage exceeds floodplain storage in drainage basins <105 km2, challenging the notion that floodplains are the dominant sedimentary sinks. In terms of carbon burial, OC concentrations in floodplains exceed those on hillslopes, and net OC accumulation rates in floodplains (0.7 ± 0.2 g C m-2a-1) surpass those on hillslopes (0.4 ± 0.1 g C m-2a-1) over the last 7500 years. We conclude that carbon burial in floodplains and on hillslopes in Central Europe exceeds terrestrial carbon storage in lakes and reservoirs by at least 2 orders of magnitude and should thus be considered in continental carbon budgets. Key Points Anthropogenic sediment storage on hillslope exceeds floodplain storage in CEOC storage in floodplains dominates millinial-scale sinkOC burial in floodplains and on hillslopes > OC storage in lakes and reservoirs ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77585
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography, University Bonn, Meckenheimer Allee 166, DE-53115 Bonn, Germany; Department of Earth and Environmental Sciences, University of Leuven, Heverlee, Belgium; Research Foundation Flanders, Brussels, Belgium; Institute of Earth and Environmental Science, University of Potsdam, Potsdam-Golm, Germany
Recommended Citation:
Hoffmann T,, Schlummer M,, Notebaert B,et al. Carbon burial in soil sediments from Holocene agricultural erosion, Central Europe[J]. Global Biogeochemical Cycles,2013-01-01,27(3)