DOI: 10.1016/j.atmosenv.2018.02.040
Scopus记录号: 2-s2.0-85042875303
论文题名: Impacts of enhanced fertilizer applications on tropospheric ozone and crop damage over sub-Saharan Africa
作者: Huang Y ; , Hickman J ; E ; , Wu S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 180 起始页码: 117
结束页码: 125
语种: 英语
Scopus关键词: Agriculture
; Air quality
; Cultivation
; Fertilizers
; Food supply
; Nitrogen fertilizers
; Nitrogen oxides
; Ozone
; Agricultural intensification
; Application of fertilizers
; Atmospheric concentration
; Chemical transport models
; Fertilizer applications
; Flux measurements
; Sub-saharan africa
; Tropospheric ozone
; Crops
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Fertilizer-induced nitrogen oxides (NOx) emissions in sub-Saharan Africa are expected to increase substantially in the coming decades, driven by increasing application of fertilizers to increase crop yields in an effort to attain food security across the continent. In many parts of sub-Saharan Africa, surface ozone (O3) is sensitive to increasing atmospheric concentrations of NOx. In this study, we employ the GEOS-Chem chemical transport model to conduct a preliminary investigation of the impacts on O3 air quality and the consequential crop damage associated with increasing fertilizer-induced NOx emissions in sub-Saharan Africa. Our simulation results, constrained by field NO flux measurements for the years 2011 and 2012 in response to a variety of fertilizer application rates in western Kenya, show that the enhancements in NO flux with fertilizer application rate of 150 kg N ha−1 can increase surface NOx and O3 concentrations by up to 0.36 and 2.8 ppbv respectively during the growing season. At the same time, accumulated O3 exposure during the crop growing season (expressed as AOT40 values) could increase by up to 496 ppb h, leading to crop yield decline of about 0.8% for O3-sensitive crops. Our results suggest that, when accounting for the consequential impacts on surface O3 air quality and crop damage over sub-Saharan Africa, agricultural intensification is possible without substantial impacts on crop productivity because the relatively small decline of crop yield resulting from O3 damage appears unlikely to outweigh the gain in crop yield from fertilization. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82899
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI, United States; The Earth Institute of Columbia University, 61 Route 9W, Lamont Hall, PO Box 1000, Palisades, NY, United States; Atmospheric Sciences Program, Michigan Technological University, Houghton, MI, United States; Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Earth and Climate Cluster, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
Recommended Citation:
Huang Y,, Hickman J,E,et al. Impacts of enhanced fertilizer applications on tropospheric ozone and crop damage over sub-Saharan Africa[J]. Atmospheric Environment,2018-01-01,180