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Is water vapor a key player of the wintertime haze in North China Plain?
Wu, Jiarui1,4,8; Bei, Naifang2; Hu, Bo3; Liu, Suixin1,4; Zhou, Meng5,6; Wang, Qiyuan1,4; Li, Xia1,4,8; Liu, Lang1,4,8; Feng, Tian1; Liu, Zirui3; Wang, Yichen1; Cao, Junji1,4; Tie, Xuexi1,4; Wang, Jun5,6; Molina, Luisa T.7; Li, Guohui1,4
通讯作者Li, Guohui(ligh@ieecas.cn)
2019-07-10
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
卷号19期号:13页码:8721-8739
摘要Water vapor has been proposed to amplify the severe haze pollution in China by enhancing the aerosol-radiation feedback (ARF). Observations have revealed that the near-surface PM2.5 concentrations ([PM2.5]) generally exhibit an increasing trend with relative humidity (RH) in the North China Plain (NCP) during 2015 wintertime, indicating that the aerosol liquid water (ALW) caused by hygroscopic growth could play an important role in the PM2.5 formation and accumulation. Simulations during a persistent and heavy haze pollution episode from 5 December 2015 to 4 January 2016 in the NCP were conducted using the WRF-Chem Model to comprehensively quantify contributions of the ALW effect to near-surface [PM2.5]. The WRF-Chem Model generally performs reasonably well in simulating the temporal variations in RH against measurements in the NCP. The factor separation approach (FSA) was used to evaluate the contribution of the ALW effect on the ARF, photochemistry, and heterogeneous reactions to [PM2.5]. The ALW not only augments particle sizes to enhance aerosol backward scattering but also increases the effective radius to favor aerosol forward scattering. The contribution of the ALW effect on the ARF and photochemistry to near-surface [PM2.5] is not significant, being generally within 1.0 mu g m(-3) on average in the NCP during the episode. Serving as an excellent substrate for heterogeneous reactions, the ALW substantially enhances the secondary aerosol (SA) formation, with an average contribution of 71 %, 10 %, 26 %, and 48% to near-surface sulfate, nitrate, ammonium, and secondary organic aerosol concentrations. Nevertheless, the SA enhancement due to the ALW decreases the aerosol optical depth and increases the effective radius to weaken the ARF, reducing near-surface primary aerosols. The contribution of the ALW total effect to near-surface [PM2.5] is 17.5% on average, which is overwhelmingly dominated by enhanced SA. Model sensitivities also show that when the RH is less than 80 %, the ALW progressively increases near-surface [PM2.5] but commences to decrease when the RH exceeds 80% due to the high occurrence frequencies of precipitation.
DOI10.5194/acp-19-8721-2019
关键词[WOS]SECONDARY ORGANIC AEROSOL ; SURFACE BOUNDARY-LAYER ; PEARL RIVER-DELTA ; TIANJIN-HEBEI BTH ; RELATIVE-HUMIDITY ; AIR-POLLUTION ; HYGROSCOPIC GROWTH ; MEXICO-CITY ; METEOROLOGICAL CONDITIONS ; HETEROGENEOUS HYDROLYSIS
收录类别SCI ; SCI
语种英语
资助项目National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality)[2017YFC0210000] ; U.S. National Science Foundation[1560494]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality) ; U.S. National Science Foundation
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000474738000003
出版者COPERNICUS GESELLSCHAFT MBH
引用统计
被引频次:42[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/13718
专题加速器质谱中心
第四纪科学与全球变化卓越创新中心
通讯作者Li, Guohui
作者单位1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
5.Univ Iowa, Dept Chem & Biochem Engn, Iowa City, IA 52242 USA
6.Univ Iowa, Interdisciplinary Grad Program Geoinformat, Iowa City, IA 52242 USA
7.Molina Ctr Energy & Environm, La Jolla, CA 92037 USA
8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Wu, Jiarui,Bei, Naifang,Hu, Bo,et al. Is water vapor a key player of the wintertime haze in North China Plain?[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(13):8721-8739.
APA Wu, Jiarui.,Bei, Naifang.,Hu, Bo.,Liu, Suixin.,Zhou, Meng.,...&Li, Guohui.(2019).Is water vapor a key player of the wintertime haze in North China Plain?.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(13),8721-8739.
MLA Wu, Jiarui,et al."Is water vapor a key player of the wintertime haze in North China Plain?".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.13(2019):8721-8739.
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