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DOI	10.1029/2021JD035237
	UK Ammonia Emissions Estimated With Satellite Observations and GEOS-Chem
	Marais E.A.; Pandey A.K.; Van Damme M.; Clarisse L.; Coheur P.-F.; Shephard M.W.; Cady-Pereira K.E.; Misselbrook T.; Zhu L.; Luo G.; Yu F.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Agricultural emissions of ammonia (NH3) impact air quality, human health, and the vitality of aquatic and terrestrial ecosystems. In the UK, there are few direct policies regulating anthropogenic NH3 emissions and development of sustainable mitigation measures necessitates reliable emissions estimates. Here, we use observations of column densities of NH3 from two space-based sensors (IASI and CrIS) with the GEOS-Chem model to derive top-down NH3 emissions for the UK at fine spatial (∼10 km) and time (monthly) scales. We focus on March-September when there is adequate spectral signal to reliably retrieve NH3. We estimate total emissions of 272 Gg from IASI and 389 Gg from CrIS. Bottom-up emissions are 27% less than IASI and 49% less than CrIS. There are also differences in seasonality. Top-down and bottom-up emissions agree on a spring April peak due to fertilizer and manure application, but there is also a comparable summer July peak in the top-down emissions that is not in the bottom-up emissions and appears to be associated with dairy cattle farming. We estimate relative errors in the top-down emissions of 11%–36% for IASI and 9%–27% for CrIS, dominated by column density retrieval errors. The bottom-up versus top-down emissions discrepancies estimated in this work impact model predictions of the environmental damage caused by NH3 emissions and warrant further investigation. © 2021. The Authors.
英文关键词	agriculture; ammonia; Earth observations; emissions; GEOS-Chem; UK
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/237009
作者单位	Department of Geography, University College London, London, United Kingdom; School of Physics and Astronomy, University of Leicester, Leicester, United Kingdom; Université libre de Bruxelles (ULB), Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Brussels, Belgium; Environment and Climate Change Canada, Toronto, ON, Canada; Atmospheric and Environmental Research (AER), Lexington, MA, United States; Department of Sustainable Agriculture Sciences, Rothamsted Research, Okehampton, United Kingdom; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China; Atmospheric Sciences Research Center, University at Albany, Albany, NY, United States
推荐引用方式 GB/T 7714	Marais E.A.,Pandey A.K.,Van Damme M.,et al. UK Ammonia Emissions Estimated With Satellite Observations and GEOS-Chem[J],2021,126(18).
APA	Marais E.A..,Pandey A.K..,Van Damme M..,Clarisse L..,Coheur P.-F..,...&Yu F..(2021).UK Ammonia Emissions Estimated With Satellite Observations and GEOS-Chem.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Marais E.A.,et al."UK Ammonia Emissions Estimated With Satellite Observations and GEOS-Chem".Journal of Geophysical Research: Atmospheres 126.18(2021).