DOI: 10.1002/2014GL060732
论文题名: A hydrologic model demonstrates nitrous oxide emissions depend on streambed morphology
作者: Marzadri A. ; Tonina D. ; Bellin A. ; Tank J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9890
EISSN: 1944-9621
出版年: 2014
卷: 41, 期: 15 起始页码: 5484
结束页码: 5491
语种: 英语
英文关键词: hyporheic zone
; nitrous oxide emissions
; stream morphology
Scopus关键词: Biogeochemistry
; Catchments
; Climate change
; Complex networks
; Denitrification
; Morphology
; Nitrogen
; Rivers
; Nitrogen oxides
; Biogeochemical characteristics
; Biogeochemical process
; Hyporheic zone
; Intergovernmental panel on climate changes
; Nitrous oxide emissions
; Stream morphology
; Streambed sediments
; Theoretical framework
; Inorganic nitrogen
; Nitrogen oxides
; Climate change
; biogeochemical cycle
; catchment
; data set
; denitrification
; estimation method
; nitrous oxide
; stream bed
; upscaling
英文摘要: Rivers are hot spots of nitrous oxide (N2O) emissions due to denitrification. Although the key role of rivers in transforming reactive inorganic nitrogen is widely recognized, the recent estimates of N2O emissions by the Intergovernmental Panel on Climate Change (IPCC) may be largely underestimated. This denotes a lack of reliable and robust methodologies to upscale denitrification, and other biogeochemical processes, from the local to the network scale. Here we demonstrate that stream hydromorphology strongly influences N2O emissions. We provide an integrative methodology for upscaling local biogeochemical processes to the catchment scale with a Damköhler number, which accounts for the complex interplay between stream hydromorphology and biogeochemical characteristics of streambed sediments. Application of this theoretical framework to the large data set collected as part of the second Lotic Intersite Nitrogen eXperiment (LINXII) demonstrates that stream morphology is a key factor controlling emissions of N2O from streams. Key Points Demonstrate the influence of stream hydromorphology on nitrous oxide emissions Estimate the role of rivers in nitrous oxide emissions at the network scale Provide an upscaling method for stream biogeochemical processes © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905307879&doi=10.1002%2f2014GL060732&partnerID=40&md5=eb54569b15f697c9745c5d67bb74fcb7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7154
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
Recommended Citation:
Marzadri A.,Tonina D.,Bellin A.,et al. A hydrologic model demonstrates nitrous oxide emissions depend on streambed morphology[J]. Geophysical Research Letters,2014-01-01,41(15).