Investigation of the Influence of Water Vapor on Heavy Pollution and Its Relationship With AOD Using MAX-DOAS on the Coast of the Yellow Sea

doi:10.1029/2020JD034143

	Investigation of the Influence of Water Vapor on Heavy Pollution and Its Relationship With AOD Using MAX-DOAS on the Coast of the Yellow Sea
	Ren, Hongmei 2,3; Li, Ang 2; Xie, Pinhua 2,3,4; Hu, Zhaokun 2; Xu, Jin 2; Huang, Yeyuan 2,3; Li, Xiaomei 2,3; Zhong, Hongyan 2,5,6; Tian, Xin 2,5,6; Ren, Bo 2,3
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2021-10-27
卷号	126
ISSN号	2169-897X
DOI	10.1029/2020JD034143
通讯作者	Li, Ang(angli@aiofm.ac.cn)
英文摘要	Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations were carried out from March 1, 2019 to February 29, 2020 in Qingdao, China, on the coast of the Yellow Sea (120.67 degrees E, 36.35 degrees N). Atmospheric parameters retrieved from the MAX-DOAS instrument included vertical profiles of aerosol extinction, gaseous aerosol precursors (NO2, SO2), and H2O. First, the seasonal relationship between aerosol optical depth (AOD) and the H2O vertical column density (VCD) was analyzed. The correlation coefficients (r) between AOD and H2O VCD were largest in the winter, followed by spring, autumn, and summer. In addition, the correlation during heavily polluted weather was much higher than that during clean weather or slightly polluted weather. Then, an analysis of the wind speed and direction, and trace gas VCDs during the months with frequent pollution (December 2019 and January 2020) found that heavy pollution episodes easily occurred in Qingdao due to a combination of high H2O concentrations and low wind speeds. Out of four pollution events (P1, P2, P3, P4), both the H2O concentration and pollution were highest during the first event (P1). The H2O VCD, AOD, sulfate AOD, and total column HNO3 simultaneously increased during P1, while the NO2 and SO2 VCDs decreased. These trends are consistent with liquid phase reactions. Finally, the 1,000 m backward trajectory for the wind and the gas profiles during P1 revealed that the pollutants increased in Qingdao due to the influence of a polluted air mass from the western inland regions. Plain Language Summary Water vapor and aerosols are important components of the atmosphere. An increase in H2O concentration will accelerate the liquid phase reactions of trace gas and aggravate haze pollution. In recent years, heavy haze pollution has frequently occurred in China, especially during the winter in the northern China. The relationship between H2O and the aerosol optical depth (AOD), and how this relationship impacts haze formation, are of great significance for understanding the mechanisms driving heavy air pollution. Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) is a remote sensing method that can simultaneously measure H2O, aerosols, and gaseous precursors (NO2, SO2). MAX-DOAS instruments are low-cost, simple to operate, and provide high time resolution, making them well-suited for atmospheric observations across large geographic regions. The ability of MAX-DOAS observations to simultaneously constrain the vertical profiles of H2O, other trace gases, and aerosols provides a measurement framework for analyzing liquid-phase reactions in heavily polluted conditions. When combined with a wind backward trajectory analysis, it is possible to study the transport of H2O and pollutants during haze events. This is crucial to understanding the causes of haze formation and informing regulatory policy.
资助项目	National Natural Science Foundation of China[41775029] ; National Natural Science Foundation of China[41975037] ; National Natural Science Foundation of China[U19A2044] ; National Key Research and Development Project of China[2018YFC0213201] ; Science and Technology Commission of Shanghai Municipality[17DZ1203102]
WOS关键词	ABSORPTION CROSS-SECTIONS ; RELATIVE-HUMIDITY ; TROPOSPHERIC NO2 ; BOUNDARY-LAYER ; AIR-POLLUTION ; RIVER-DELTA ; CHINA ; AEROSOLS ; HAZE ; NM
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000711482400023
资助机构	National Natural Science Foundation of China ; National Key Research and Development Project of China ; Science and Technology Commission of Shanghai Municipality
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125777]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Ang
作者单位	1.China Natl Environm Monitoring Ctr, Beijing, Peoples R China 2.Chinese Acad Sci, Key Lab Environm Opt & Technol, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei, Peoples R China 3.Univ Sci & Technol China, Hefei, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen, Peoples R China 5.Anhui Univ, Inst Phys Sci, Hefei, Peoples R China 6.Anhui Univ, Inst Informat Technol, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Ren, Hongmei,Li, Ang,Xie, Pinhua,et al. Investigation of the Influence of Water Vapor on Heavy Pollution and Its Relationship With AOD Using MAX-DOAS on the Coast of the Yellow Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2021,126.
APA	Ren, Hongmei.,Li, Ang.,Xie, Pinhua.,Hu, Zhaokun.,Xu, Jin.,...&Chai, Wenxuan.(2021).Investigation of the Influence of Water Vapor on Heavy Pollution and Its Relationship With AOD Using MAX-DOAS on the Coast of the Yellow Sea.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126.
MLA	Ren, Hongmei,et al."Investigation of the Influence of Water Vapor on Heavy Pollution and Its Relationship With AOD Using MAX-DOAS on the Coast of the Yellow Sea".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126(2021).