气候变化领域集成服务门户(CCPortal): Ground-based MAX-DOAS observations of tropospheric formaldehyde VCDs and comparisons with the CAMS model at a rural site near Beijing during APEC 2014

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DOI	10.5194/acp-19-3375-2019
	Ground-based MAX-DOAS observations of tropospheric formaldehyde VCDs and comparisons with the CAMS model at a rural site near Beijing during APEC 2014
	Tian X.; Xie P.; Xu J.; Wang Y.; Li A.; Wu F.; Hu Z.; Liu C.; Zhang Q.
发表日期	2019
ISSN	16807316
起始页码	3375
结束页码	3393
卷号	19 期号:5
英文摘要	Formaldehyde (HCHO), a key aerosol precursor, plays a significant role in atmospheric photo-oxidation pathways. In this study, HCHO column densities were measured using a Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument at the University of Chinese Academy of Science (UCAS) in Huairou District, Beijing, which is about 50 km away from the city center. Measurements were taken during the period of 1 October 2014 to 31 December 2014, and the Asia-Pacific Economic Cooperation (APEC) summit was organized on 5-11 November. Peak values of HCHO vertical column densities (VCDs) around noon and a good correlation coefficient R2 of 0.73 between HCHO VCDs and surface O3 concentration during noontime indicated that the secondary sources of HCHO through photochemical reactions of volatile organic compounds (VOCs) dominated the HCHO values in the area around UCAS. Dependences of HCHO VCDs on wind fields and backward trajectories were identified and indicated that the HCHO values in the area around UCAS were considerably affected by the transport of pollutants (VOCs) from polluted areas in the south. The effects of control measures on HCHO VCDs during the APEC period were evaluated. During the period of the APEC conference, the average HCHO VCDs were ∼ 38%±20% and ∼ 30%±24% lower than that during the pre-APEC and post-APEC periods calculated at the 95% confidence limit, respectively. This phenomenon could be attributed to both the effects of prevailing northwest wind fields during APEC and strict control measures. We also compared the MAX-DOAS results with the Copernicus Atmosphere Monitoring Service (CAMS) model. The HCHO VCDs of the CAMS model and MAX-DOAS were generally consistent with a correlation coefficient R2 greater than 0.68. The peak values were consistently captured by both data datasets, but the low values were systematically underestimated by the CAMS model. This finding may indicate that the CAMS model can adequately simulate the effects of the transport and the secondary sources of HCHO but underestimates the local primary sources. © Author(s) 2019.
语种	英语
scopus关键词	atmospheric chemistry; atmospheric transport; comparative study; concentration (composition); formaldehyde; ground-based measurement; photochemistry; photooxidation; reaction kinetics; troposphere; vertical distribution; volatile organic compound
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144569
作者单位	School of Environmental Science and Optoeclectronic Technology, University of Science and Technology of China, Hefei, 230026, China; Key laboratory of Environmental Optical and Technology, Anhui Institute of Optics and Fine Mechanies, Chinese Academy of Science, Hefei, 230031, China; CAS Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Max Planck Institute for Chemistry, Mainz, 55128, Germany; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China; Anhui Province Key Laboratory of Polar Environment and Global Change, USTC, Hefei, 230026, China
推荐引用方式 GB/T 7714	Tian X.,Xie P.,Xu J.,et al. Ground-based MAX-DOAS observations of tropospheric formaldehyde VCDs and comparisons with the CAMS model at a rural site near Beijing during APEC 2014[J],2019,19(5).
APA	Tian X..,Xie P..,Xu J..,Wang Y..,Li A..,...&Zhang Q..(2019).Ground-based MAX-DOAS observations of tropospheric formaldehyde VCDs and comparisons with the CAMS model at a rural site near Beijing during APEC 2014.Atmospheric Chemistry and Physics,19(5).
MLA	Tian X.,et al."Ground-based MAX-DOAS observations of tropospheric formaldehyde VCDs and comparisons with the CAMS model at a rural site near Beijing during APEC 2014".Atmospheric Chemistry and Physics 19.5(2019).