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Mapping the drivers of formaldehyde (HCHO) variability from 2015 to 2019 over eastern China: insights from Fourier transform infrared observation and GEOS-Chem model simulation

文献类型：期刊论文

作者Sun, Youwen6,7; Yin, Hao6,7; Liu, Cheng4,5,6,7,8; Zhang, Lin13; Cheng, Yuan2; Palm, Mathias14; Notholt, Justus14; Lu, Xiao3; Vigouroux, Corinne9; Zheng, Bo10
刊名ATMOSPHERIC CHEMISTRY AND PHYSICS
出版日期2021-04-27
卷号21
ISSN号1680-7316
DOI10.5194/acp-21-6365-2021
通讯作者Liu, Cheng(chliu81@ustc.edu.cn) ; Zhang, Lin(zhanglg@pku.edu.cn) ; Cheng, Yuan(ycheng@hit.edu.cn)
英文摘要The major air pollutant emissions have decreased, and the overall air quality has substantially improved across China in recent years as a consequence of active clean air policies for mitigating severe air pollution problems. As key precursors of formaldehyde (HCHO) and ozone (O-3), the volatile organic compounds (VOCs) in China are still increasing due to the lack of mitigation measures for VOCs. In this study, we investigated the drivers of HCHO variability from 2015 to 2019 over Hefei, eastern China, by using ground-based high-resolution Fourier transform infrared (FTIR) spectroscopy and GEOS-Chem model simulation. Seasonal and interannual variabilities of HCHO over Hefei were analyzed and hydroxyl (OH) radical production rates from HCHO photolysis were evaluated. The relative contributions of emitted and photochemical sources to the observed HCHO were analyzed by using ground-level carbon monoxide (CO) and O x (O-3 + nitrogen oxide (NO2)) as tracers for emitted and photochemical HCHO, respectively. Contributions of emission sources from various categories and geographical regions to the observed HCHO summer-time enhancements were determined by using a series of GEOS-Chem sensitivity simulations. The column-averaged dry air mole fractions of HCHO (X-HCHO) reached a maximum monthly mean value of 1.1 +/- 0.27 ppbv in July and a minimum monthly mean value of 0.4 +/- 0.11 ppbv in January. The X-HCHO time series from 2015 to 2019 over Hefei showed a positive change rate of 2.38 +/- 0.71% per year. The photochemical HCHO is the dominant source of atmospheric HCHO over Hefei for most of the year (68.1 %). In the studied years, the HCHO photolysis was an important source of OH radicals over Hefei during all sunlight hours of both summer and winter days. The oxidations of both methane (CH4) and nonmethane VOCs (NMVOCs) dominate the HCHO production over Hefei and constitute the main driver of its summertime enhancements. The NMVOC-related HCHO summertime enhancements were dominated by the emissions within eastern China. The observed increasing change rate of HCHO from 2015 to 2019 over Hefei was attributed to the increase in photochemical HCHO resulting from increasing change rates of both CH4 and NMVOC oxidations, which overwhelmed the decrease in emitted HCHO. This study provides a valuable evaluation of recent VOC emissions and regional photochemical capacity in China. In addition, understanding the sources of HCHO is a necessary step for tackling air pollution in eastern China and mitigating the emissions of pollutants.
资助项目National High Technology Research and Development Program of China[2019YFC0214802] ; National High Technology Research and Development Program of China[2017YFC0210002] ; National High Technology Research and Development Program of China[2018YFC0213201] ; National High Technology Research and Development Program of China[2019YFC0214702] ; National Science Foundation of China[51778596] ; National Science Foundation of China[41977184] ; National Science Foundation of China[41775025] ; Major Projects of High Resolution Earth Observation Systems of National Science and Technology[05-Y30B01-9001-19/20-3] ; Sino-German Mobility programme[M-0036] ; Anhui Province Natural Science Foundation of China[2008085QD180]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000646399900004
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National High Technology Research and Development Program of China ; National Science Foundation of China ; Major Projects of High Resolution Earth Observation Systems of National Science and Technology ; Sino-German Mobility programme ; Anhui Province Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/121687]  
专题中国科学院合肥物质科学研究院
通讯作者Liu, Cheng; Zhang, Lin; Cheng, Yuan
作者单位1.Anhui Univ, Inst Phys Sci, Hefei 230601, Peoples R China
2.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
3.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
4.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat Anhui Higher Educ, Hefei 230026, Peoples R China
5.Univ Sci & Technol China, Anhui Prov Key Lab Polar Environm & Global Change, Hefei 230026, Peoples R China
6.Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei 230026, Peoples R China
7.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, HFIPS, Hefei 230031, Peoples R China
8.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
9.Royal Belgian Inst Space Aeron BIRA IASB, Brussels, Belgium
10.CEA CNRS UVSQ, UMR8212, Lab Sci Climat & Environm, Gif Sur Yvette, France
推荐引用方式
GB/T 7714		 Sun, Youwen,Yin, Hao,Liu, Cheng,et al. Mapping the drivers of formaldehyde (HCHO) variability from 2015 to 2019 over eastern China: insights from Fourier transform infrared observation and GEOS-Chem model simulation[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21.
APA Sun, Youwen.,Yin, Hao.,Liu, Cheng.,Zhang, Lin.,Cheng, Yuan.,...&Liu, Jianguo.(2021).Mapping the drivers of formaldehyde (HCHO) variability from 2015 to 2019 over eastern China: insights from Fourier transform infrared observation and GEOS-Chem model simulation.ATMOSPHERIC CHEMISTRY AND PHYSICS,21.
MLA Sun, Youwen,et al."Mapping the drivers of formaldehyde (HCHO) variability from 2015 to 2019 over eastern China: insights from Fourier transform infrared observation and GEOS-Chem model simulation".ATMOSPHERIC CHEMISTRY AND PHYSICS 21(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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