DOI: 10.1002/2013GL057450
论文题名: Age of riverine carbon suggests rapid export of terrestrial primary production in tropics
作者: Martin E.E. ; Ingalls A.E. ; Richey J.E. ; Keil R.G. ; Santos G.M. ; Truxal L.T. ; Alin S.R. ; Druffel E.R.M.
刊名: Geophysical Research Letters
ISSN: 0094-8408
EISSN: 1944-8139
出版年: 2013
卷: 40, 期: 21 起始页码: 5687
结束页码: 5691
语种: 英语
英文关键词: lignin
; Mekong
; radiocarbon
; residence time
; tropics
Scopus关键词: Atmospheric carbon dioxide
; Mekong
; Plant-derived carbon
; radiocarbon
; Radiocarbon dating
; Residence time
; Terrestrial biosphere
; Terrestrial ecosystems
; Atmospheric chemistry
; Carbon dioxide
; Catchments
; Global warming
; Lignin
; Rivers
; Tropics
; Carbon
; age
; age determination
; biosphere
; carbon cycle
; carbon dioxide
; carbon sink
; catchment
; estimation method
; magnitude
; mathematical analysis
; numerical model
; oxidation
; phenol
; prediction
; primary production
; radiocarbon dating
; soil carbon
; suspended sediment
; terrestrial environment
; timescale
; vascular plant
; Tracheophyta
英文摘要: The balance between the storage of vascular plant carbon in soils, oxidation to carbon dioxide, and export via rivers affects calculations of the strength of terrestrial ecosystems as carbon sinks. The magnitude and timescale of the riverine export pathway are not well constrained. Here we use radiocarbon dating of lignin phenols to show that plant-derived carbon carried by suspended sediment of the Mekong River is very young, having been produced within the last 18 years. Further, this plant-derived carbon remains young during times of the year when bulk carbon varies from modern to over 3000 radiocarbon years old. Our results demonstrate that primary-production derivatives are exported rapidly and suggest that the age of riverine lignin is similar to estimates of the residence time of terrestrial organic carbon in tropical catchments. These results are relevant for modeling predictions of the influence of the terrestrial biosphere on atmospheric carbon dioxide levels. Key Points Age of riverine carbon varies seasonally by thousands of years Age of lignin indicates rapid export of terrestrial production by rivers Lignin is youngest component of carbon found in rivers ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887284013&doi=10.1002%2f2013GL057450&partnerID=40&md5=511d25d2855f9970254401aaa1b0d03d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5672
Appears in Collections: 气候减缓与适应
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作者单位: School of Oceanography, University of Washington, Seattle, WA 98195, United States
Recommended Citation:
Martin E.E.,Ingalls A.E.,Richey J.E.,et al. Age of riverine carbon suggests rapid export of terrestrial primary production in tropics[J]. Geophysical Research Letters,2013-01-01,40(21).