气候变化领域集成服务门户(CCPortal): Long-Term trends in air quality in major cities in the UK and India: A view from space

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DOI	10.5194/acp-21-6275-2021
	Long-Term trends in air quality in major cities in the UK and India: A view from space
	Vohra K.; Marais E.A.; Suckra S.; Kramer L.; Bloss W.J.; Sahu R.; Gaur A.; Tripathi S.N.; Van Damme M.; Clarisse L.; Coheur P.F.
发表日期	2021
ISSN	1680-7316
起始页码	6275
结束页码	6296
卷号	21 期号:8
英文摘要	Air quality networks in cities can be costly and inconsistent and typically monitor a few pollutants. Spacebased instruments provide global coverage spanning more than a decade to determine trends in air quality, augmenting surface networks. Here we target cities in the UK (London and Birmingham) and India (Delhi and Kanpur) and use observations of nitrogen dioxide (NO2) from the Ozone Monitoring Instrument (OMI), ammonia (NH3) from the Infrared Atmospheric Sounding Interferometer (IASI), formaldehyde (HCHO) from OMI as a proxy for non-methane volatile organic compounds (NMVOCs), and aerosol optical depth (AOD) from the Moderate Resolution Imaging Spectroradiometer (MODIS) for PM2:5. We assess the skill of these products at reproducing monthly variability in surface concentrations of air pollutants where available. We find temporal consistency between column and surface NO2 in cities in the UK and India (R D0.5 0.7) and NH3 at two of three rural sites in the UK (R D0.5 0.7) but not between AOD and surface PM2:5 (R 0.4). MODIS AOD is consistent with AERONET at sites in the UK and India (R 0.8) and reproduces a significant decline in surface PM2:5 in London (2.7%a1) and Birmingham (3.7%a1) since 2009. We derive long-Term trends in the four cities for 2005 2018 from OMI and MODIS and for 2008 2018 from IASI. Trends of all pollutants are positive in Delhi, suggesting no air quality improvements there, despite the roll-out of controls on industrial and transport sectors. Kanpur, identified by the WHO as the most polluted city in the world in 2018, experiences a significant and substantial (3.1%a1) increase in PM2:5. The decline of NO2, NH3, and PM2:5 in London and Birmingham is likely due in large part to emissions controls on vehicles. Trends are significant only for NO2 and PM2:5. Reactive NMVOCs decline in Birmingham, but the trend is not significant. There is a recent (2012 2018) steep (9%a1) increase in reactive NMVOCs in London. The cause for this rapid increase is uncertain but may reflect the increased contribution of oxygenated volatile organic compounds (VOCs) from household products, the food and beverage industry, and domestic wood burning, with implications for the formation of ozone in a VOC-limited city. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; air quality; ammonia; atmospheric pollution; formaldehyde; IASI; MODIS; nitrogen dioxide; ozone; particulate matter; trend analysis; urban atmosphere; volatile organic compound; Birmingham [England]; Delhi; England; India; Kanpur; London [England]; United Kingdom; Uttar Pradesh; Varanidae
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246937
作者单位	School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; School of Physics and Astronomy, University of Leicester, Leicester, United Kingdom; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India; Université Libre de Bruxelles (ULB), Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Brussels, Belgium; Department of Geography, University of College London, London, United Kingdom; National Environment and Planning Agency, Kingston, Jamaica; Ricardo Energy and Environment, Harwell, United Kingdom
推荐引用方式 GB/T 7714	Vohra K.,Marais E.A.,Suckra S.,et al. Long-Term trends in air quality in major cities in the UK and India: A view from space[J],2021,21(8).
APA	Vohra K..,Marais E.A..,Suckra S..,Kramer L..,Bloss W.J..,...&Coheur P.F..(2021).Long-Term trends in air quality in major cities in the UK and India: A view from space.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Vohra K.,et al."Long-Term trends in air quality in major cities in the UK and India: A view from space".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).