气候变化领域集成服务门户(CCPortal): Assessment of Nitrogen Oxide Emissions and San Joaquin Valley PM2.5 Impacts From Soils in California

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DOI	10.1029/2020JD033304
	Assessment of Nitrogen Oxide Emissions and San Joaquin Valley PM2.5 Impacts From Soils in California
	Guo L.; Chen J.; Luo D.; Liu S.; Lee H.J.; Motallebi N.; Fong A.; Deng J.; Rasool Q.Z.; Avise J.C.; Kuwayama T.; Croes B.E.; FitzGibbon M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:24
英文摘要	Soils are a source of atmospheric nitrogen oxides (NOx), especially in regions with significant cropland where nitrogen (N) fertilizers are used to enhance crop yields. The magnitude of soil NOx emissions, however, varies substantially by region, depending on the local land use pattern and management activities. We estimated soil NOx emissions in California based on the DeNitrification-DeComposition (DNDC) biogeochemical model, linked to a detailed spatial-temporal differentiated California-specific database. The DNDC-generated surface fluxes were used in the Community Multiscale Air Quality (CMAQ) model to evaluate impacts of soil NOx emissions on formation of ambient particulate (PM2.5) nitrate in the San Joaquin Valley (SJV) where cropland is the dominant land use. The DNDC-generated soil NOx emissions contribute approximately 1.1% of total anthropogenic NOx emissions in California, at an emission rate of roughly 24 t day−1 (as NO2) statewide and 9 t day−1 in the SJV. Cropland is the dominant source of soil NOx emissions in California, contributing nearly 60% of statewide soil NOx emissions, driven principally by fertilizer use. The PM2.5 nitrate concentrations simulated by CMAQ using the DNDC-generated soil NOx emissions are compatible with those observed in the SJV, suggesting that soil NOx emissions have limited impacts on PM2.5 nitrate formation in the atmosphere. Our emission and air quality modeling results are further supported by long-term ambient NOx-to-carbon monoxide (CO) and satellite NO2 data analyses in the SJV, which showed diurnal, monthly, and annual trends consistent with characteristics of NOx sources dominated by traffic combustion in both urban and agricultural regions. ©2020. The Authors.
英文关键词	air quality modeling; ambient and satellite data; biogenic soil emissions; biogeochemical modeling; NOx; PM2.5
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185576
作者单位	California Air Resources Board, Sacramento, CA, United States; California Department of Resources Recycling and Recovery, Sacramento, CA, United States; Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States; Department of Environmental Science and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Now at Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Guo L.,Chen J.,Luo D.,et al. Assessment of Nitrogen Oxide Emissions and San Joaquin Valley PM2.5 Impacts From Soils in California[J],2020,125(24).
APA	Guo L..,Chen J..,Luo D..,Liu S..,Lee H.J..,...&FitzGibbon M..(2020).Assessment of Nitrogen Oxide Emissions and San Joaquin Valley PM2.5 Impacts From Soils in California.Journal of Geophysical Research: Atmospheres,125(24).
MLA	Guo L.,et al."Assessment of Nitrogen Oxide Emissions and San Joaquin Valley PM2.5 Impacts From Soils in California".Journal of Geophysical Research: Atmospheres 125.24(2020).