Spaceborne tropospheric nitrogen dioxide (NO2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers

doi:10.5194/acp-22-4167-2022

	Spaceborne tropospheric nitrogen dioxide (NO2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers
	Yin, Hao 1,2; Sun, Youwen 1; Notholt, Justus 3; Palm, Mathias 3; Liu, Cheng 2,4,5,6
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2022-03-31
卷号	22
ISSN号	1680-7316
DOI	10.5194/acp-22-4167-2022
通讯作者	Sun, Youwen(ywsun@aiofm.ac.cn) ; Liu, Cheng(chliu81@ustc.edu.cn)
英文摘要	Nitrogen dioxide (NO2) is mainly affected by local emission and meteorology rather than long-range transport. Accurate knowledge of its long-term variabilities and drivers is significant for understanding the evolution of economic and social development, anthropogenic emission, and the effectiveness of pollution control measures on a regional scale. In this study, we quantity the long-term variabilities and the underlying drivers of NO2 from 2005-2020 over the Yangtze River Delta (YRD), one of the most densely populated and highly industrialized city clusters in China, using OMI spaceborne observations and the multiple linear regression (MLR) model. We have compared the spaceborne tropospheric results to surface in situ data, yielding correlation coefficients of 0.8 to 0.9 over all megacities within the YRD. As a result, the tropospheric NO2 column measurements can be taken as representative of near-surface conditions, and we thus only use ground-level meteorological data for MLR. The inter-annual variabilities of tropospheric NO2 vertical column density (NO2 VCDtrop) from 2005-2020 over the YRD can be divided into two stages. The first stage was from 2005-2011, which showed overall increasing trends with a wide range of (1.91 +/- 1.50) to (6.70 +/- 0.10) x 10(14) molec. cm(-2) yr(-1) (p < 0.01) over the YRD. The second stage was from 2011-2020, which showed overall decreasing trends of (-6.31 +/- 0.71) to (-11.01 +/- 0.90) x 10(14) molec. cm(-2) yr(-1) (p < 0.01) over each of the megacities. The seasonal cycles of NO2 VCD trop over the YRD are mainly driven by meteorology (81.01 %-83.91 %), except during winter when anthropogenic emission contributions are pronounced (16.09 %-18.99 %). The inter-annual variabilities of NO2 VCDtrop are mainly driven by anthropogenic emission (69.18 %-81.34 %), except for a few years such as 2018 which are partly attributed to meteorology anomalies (39.07 %-91.51 %). The increasing trends in NO2 VCDtrop from 2005-2011 over the YRD are mainly attributed to high energy consumption associated with rapid economic growth, which causes significant increases in anthropogenic NO2 emission. The decreasing trends in NO2 VCDtrop from 2011-2020 over the YRD are mainly attributed to the stringent clean air measures which either adjust high-energy industrial structure toward low-energy industrial structure or directly reduce pollutant emissions from different industrial sectors.
资助项目	National Key Research and Development Program of China[2019YFC0214802] ; Youth Innovation Promotion Association, CAS[2019434] ; Sino-German Mobility Programme[M-0036]
WOS关键词	SURFACE OZONE POLLUTION ; LINE-SHAPE DEGRADATION ; HIGH-RESOLUTION ; ANTHROPOGENIC EMISSIONS ; IN-SITU ; OMI OBSERVATIONS ; AIR-POLLUTION ; TIME-SERIES ; METEOROLOGICAL CONDITIONS ; SATELLITE-OBSERVATIONS
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000776035400001
资助机构	National Key Research and Development Program of China ; Youth Innovation Promotion Association, CAS ; Sino-German Mobility Programme
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128229]
专题	中国科学院合肥物质科学研究院
通讯作者	Sun, Youwen; Liu, Cheng
作者单位	1.Chinese Acad Sci, HFIPS, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei 230026, Peoples R China 3.Univ Bremen, Inst Environm Phys, POB 330440, D-28334 Bremen, Germany 4.Univ Sci & Technol China, Anhui Prov Key Lab Polar Environm & Global Change, Hefei 230026, Peoples R China 5.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 6.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat Anhui Higher Educ, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Yin, Hao,Sun, Youwen,Notholt, Justus,et al. Spaceborne tropospheric nitrogen dioxide (NO2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2022,22.
APA	Yin, Hao,Sun, Youwen,Notholt, Justus,Palm, Mathias,&Liu, Cheng.(2022).Spaceborne tropospheric nitrogen dioxide (NO2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers.ATMOSPHERIC CHEMISTRY AND PHYSICS,22.
MLA	Yin, Hao,et al."Spaceborne tropospheric nitrogen dioxide (NO2) observations from 2005-2020 over the Yangtze River Delta (YRD), China: variabilities, implications, and drivers".ATMOSPHERIC CHEMISTRY AND PHYSICS 22(2022).