DOI: 10.1002/grl.50957
论文题名: Land use change and nitrogen feedbacks constrain the trajectory of the land carbon sink
作者: Gerber S. ; Hedin L.O. ; Keel S.G. ; Pacala S.W. ; Shevliakova E.
刊名: Geophysical Research Letters
ISSN: 0094-8533
EISSN: 1944-8264
出版年: 2013
卷: 40, 期: 19 起始页码: 5218
结束页码: 5222
语种: 英语
英文关键词: anthropogenic carbon uptake
; dynamic vegetation model
; land use
; nitrogen limitation
; residual terrestrial carbon sink
Scopus关键词: Anthropogenic carbon
; Atmospheric nitrogen deposition
; Carbon sink
; Carbon-climate systems
; Dynamic vegetation model
; Nitrogen limitation
; Nonlinear interactions
; Secondary vegetation
; Carbon
; Carbon dioxide
; Deforestation
; Land use
; Nitrogen
; Nonlinear analysis
; Vegetation
; Nitrogen fixation
; carbon dioxide
; carbon sink
; deforestation
; extratropical environment
; global climate
; land use change
; nitrogen
; nitrogen fixation
; nonlinearity
英文摘要: Our understanding of Earth's carbon climate system depends critically upon interactions between rising atmospheric CO2, changing land use, and nitrogen limitation on vegetation growth. Using a global land model, we show how these factors interact locally to generate the global land carbon sink over the past 200 years. Nitrogen constraints were alleviated by N2 fixation in the tropics and by atmospheric nitrogen deposition in extratropical regions. Nonlinear interactions between land use change and land carbon and nitrogen cycling originated from three major mechanisms: (i) a sink foregone that would have occurred without land use conversion; (ii) an accelerated response of secondary vegetation to CO2 and nitrogen, and (iii) a compounded clearance loss from deforestation. Over time, these nonlinear effects have become increasingly important and reduce the present-day net carbon sink by ∼40% or 0.4 PgC yr-1. Key Points Interactions between land-use and CO2 response curtail the land carbon uptake Successional dynamics of land-use recovery affect nitrogen supply and CO2 sink ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884801374&doi=10.1002%2fgrl.50957&partnerID=40&md5=fb1b27ddb4ae21e1f855b8e163f57004
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5797
Appears in Collections: 气候减缓与适应
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作者单位: Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States
Recommended Citation:
Gerber S.,Hedin L.O.,Keel S.G.,et al. Land use change and nitrogen feedbacks constrain the trajectory of the land carbon sink[J]. Geophysical Research Letters,2013-01-01,40(19).