DOI: 10.1002/2015GB005119
Scopus记录号: 2-s2.0-84946552015
论文题名: Biogenic carbon fluxes from global agricultural production and consumption
作者: Wolf J ; , West T ; O ; , Le Page Y ; , Kyle G ; P ; , Zhang X ; , Collatz G ; J ; , Imhoff M ; L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 10 起始页码: 1617
结束页码: 1639
语种: 英语
英文关键词: agricultural sustainability
; atmospheric inverse modeling
; carbon dioxide
; land cover
; methane
; remote Sensing
Scopus关键词: agricultural land
; agricultural production
; alternative agriculture
; biogenic emission
; bottom-up approach
; carbon budget
; carbon flux
; crop residue
; global perspective
; grazing
; inverse analysis
; land cover
; livestock
; methane
; MODIS
; net primary production
; quantitative analysis
; remote sensing
; satellite data
英文摘要: Quantification of biogenic carbon fluxes from agricultural lands is needed to generate comprehensive bottom-up estimates of net carbon exchange for global and regional carbon monitoring. We estimated global agricultural carbon fluxes associated with annual crop net primary production (NPP), harvested biomass, and consumption of biomass by humans and livestock. These estimates were combined for a single estimate of net carbon exchange and spatially distributed to 0.05resolution using Moderate Resolution Imaging Spectroradiometer satellite land cover data. Global crop NPP in 2011 was estimated at 5.25 ± 0.46 Pg C yr-1, of which 2.05 ± 0.05 Pg C yr-1 was harvested and 0.54 Pg C yr-1 was collected from crop residues for livestock fodder. Total livestock feed intake in 2011 was 2.42 ± 0.21 Pg C yr-1, of which 2.31 ± 0.21 Pg C yr-1 was emitted as CO2, 0.07 ± 0.01 Pg C yr-1 was emitted as CH4, and 0.04 Pg C yr-1 was contained within milk and egg production. Livestock grazed an estimated 1.27 Pg C yr-1 in 2011, which constituted 52.4% of total feed intake. Global human food intake was 0.57 ± 0.03 Pg C yr-1 in 2011, the majority of which was respired as CO2. Completed global cropland carbon budgets accounted for the ultimate use of approximately 80% of harvested biomass. The spatial distribution of these fluxes may be used for global carbon monitoring, estimation of regional uncertainty, and for use as input to Earth system models. © Published 2015. This article is a U.S. Government work and is in the public domain in the USA. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77918
Appears in Collections: 气候变化事实与影响
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作者单位: Joint Global Change Research Institute, Pacific Northwest National Laboratory, College ParkMD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Wolf J,, West T,O,et al. Biogenic carbon fluxes from global agricultural production and consumption[J]. Global Biogeochemical Cycles,2015-01-01,29(10)