气候变化领域集成服务门户(CCPortal): Characterization of the Global Sources of Atmospheric Ammonia from Agricultural Soils

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DOI	10.1029/2019JD031684
	Characterization of the Global Sources of Atmospheric Ammonia from Agricultural Soils
	Aneja V.P.; Schlesinger W.H.; Li Q.; Nahas A.; Battye W.H.
发表日期	2020
ISSN	2169897X
卷号	125 期号:3
英文摘要	Global ammonia (NH3) emissions to the atmosphere are projected to increase in the coming years with the increased use of synthetic nitrogen fertilizers and cultivation of nitrogen-fixing crops. A statistical model (NH3_STAT) is developed for characterizing atmospheric NH3 emissions from agricultural soils and compared to the performance of other global and regional NH3 models (e.g., Emission Database for Global Atmospheric Research, Magnitude and Seasonality of Agricultural Emissions, MIX, and U.S. Environmental Protection Agency). The statistical model was developed from a multiple linear regression between NH3 emission and the physicochemical variables. The model was evaluated for 2012 NH3 emissions. The results indicate that, in comparison to other data sets, the model provides a lower global NH3 estimate by 58%, (NH3_STAT: 13.9 Tg N yr−1; Emission Database for Global Atmospheric Research: 33.0 Tg N yr−1). We also performed a region-based analysis (United States, India, and China) using the NH3_STAT model. For the United States, our model produces an estimate that is a ~1.4 times higher in comparison to the Environmental Protection Agency. Meanwhile, the NH3_STAT estimate for India shows NH3 emissions between 0.8 and 1.4 times lower when compared to other data sets. A lower estimate is also seen for China, where the model estimates NH3 emissions 0.4 to 5 times lower than other data sets. The difference in the global estimates is attributed to the lower estimates in major agricultural countries like China and India. The statistical model captures the spatial distribution of global NH3 emissions by utilizing a simplified approach compared to other readily available data sets. Moreover, the NH3_STAT model provides an opportunity to predict future NH3 emissions in a changing world. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	agricultural soils; ammonia; emissions; statistical model
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/186202
作者单位	Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University at Raleigh, Raleigh, NC, United States; Nicholas School of the Environment, Duke University, Durham, NC, United States
推荐引用方式 GB/T 7714	Aneja V.P.,Schlesinger W.H.,Li Q.,et al. Characterization of the Global Sources of Atmospheric Ammonia from Agricultural Soils[J],2020,125(3).
APA	Aneja V.P.,Schlesinger W.H.,Li Q.,Nahas A.,&Battye W.H..(2020).Characterization of the Global Sources of Atmospheric Ammonia from Agricultural Soils.Journal of Geophysical Research: Atmospheres,125(3).
MLA	Aneja V.P.,et al."Characterization of the Global Sources of Atmospheric Ammonia from Agricultural Soils".Journal of Geophysical Research: Atmospheres 125.3(2020).