Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005-2017

HFCAS OpenIR

	Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005-2017
	2019
发表期刊	LIGHT-SCIENCE & APPLICATIONS
ISSN	2047-7538
摘要	Abundances of a range of air pollutants can be inferred from satellite UV-Vis spectroscopy measurements by using the unique absorption signatures of gas species. Here, we implemented several spectral fitting methods to retrieve tropospheric NO2, SO2, and HCHO from the ozone monitoring instrument (OMI), with radiative simulations providing necessary information on the interactions of scattered solar light within the atmosphere. We analyzed the spatial distribution and temporal trends of satellite-observed air pollutants over eastern China during 2005-2017, especially in heavily polluted regions. We found significant decreasing trends in NO2 and SO2 since 2011 over most regions, despite varying temporal features and turning points. In contrast, an overall increasing trend was identified for tropospheric HCHO over these regions in recent years. Furthermore, generalized additive models were implemented to understand the driving forces of air quality trends in China and assess the effectiveness of emission controls. Our results indicated that although meteorological parameters, such as wind, water vapor, solar radiation and temperature, mainly dominated the day-to-day and seasonal fluctuations in air pollutants, anthropogenic emissions played a unique role in the long-term variation in the ambient concentrations of NO2, SO2, and HCHO in the past 13 years. Generally, recent declines in NO2 and SO2 could be attributed to emission reductions due to effective air quality policies, and the opposite trends in HCHO may urge the need to control anthropogenic volatile organic compound (VOC) emissions.
关键词	ANTHROPOGENIC EMISSIONS POLLUTION AEROSOL PM2.5 HAZE OMI NO2 MISSION IMPACT SO2
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [National Key Research and Development Program of China] ; [Strategic Priority Research Program of the Chinese Academy of Sciences] ; [National Key Project for Causes and Control of Heavy Air Pollution] ; [Major Projects of High Resolution Earth Observation Systems of National Science and Technology]
WOS记录号	WOS:000495999100001
CSCD记录号	CSCD:6647856
引用统计	被引频次：126[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/60158
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005-2017[J]. LIGHT-SCIENCE & APPLICATIONS,2019,8.
APA	(2019).Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005-2017.LIGHT-SCIENCE & APPLICATIONS,8.
MLA	"Satellite UV-Vis spectroscopy: implications for air quality trends and their driving forces in China during 2005-2017".LIGHT-SCIENCE & APPLICATIONS 8(2019).