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J Environ Sci (China)

Title:		Vertical profiles of biogenic volatile organic compounds as observed online at a tower in Beijing
Author(s):		Zhang H; Zhang Y; Huang Z; Acton WJF; Wang Z; Nemitz E; Langford B; Mullinger N; Davison B; Shi Z; Liu D; Song W; Yang W; Zeng J; Wu Z; Fu P; Zhang Q; Wang X;
Address:		"State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: zhang_yl86@gig.ac.cn. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment and Guangdong Key Laboratory of Water and Air Pollution Control, South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou 510655, China. Lancaster Environment Centre, Lancaster University, Lancaster LA14YQ, UK. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Centre for Ecology and Hydrology, Edinburgh EH26 0QB, UK. School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK; Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China. School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK. Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China"
Journal Title:		J Environ Sci (China)
Year:		2020
Volume:		20200501
Issue:
Page Number:		33 - 42
DOI:		10.1016/j.jes.2020.03.032
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Vertical profiles of isoprene and monoterpenes were measured by a proton transfer reaction-time of flight-mass spectrometry (PTR-ToF-MS) at heights of 3, 15, 32, 64, and 102 m above the ground on the Institute of Atmospheric Physics (IAP) tower in central Beijing during the winter of 2016 and the summer of 2017. Isoprene mixing ratios were larger in summer due to much stronger local emissions whereas monoterpenes were lower in summer due largely to their consumption by much higher levels of ozone. Isoprene mixing ratios were the highest at the 32 m in summer (1.64 +/- 0.66 ppbV) and at 15 m in winter (1.41 +/- 0.64 ppbV) with decreasing concentrations to the ground and to the 102 m, indicating emission from the tree canopy of the surrounding parks. Monoterpene mixing ratios were the highest at the 3 m height in both the winter (0.71 +/- 0.42 ppbV) and summer (0.16 +/- 0.10 ppbV) with a gradual decreasing trend to 102 m, indicting an emission from near the ground level. The lowest isoprene and monoterpene mixing ratios all occurred at 102 m, which were 0.71 +/- 0.42 ppbV (winter) and 1.35 +/- 0.51 ppbV (summer) for isoprene, and 0.42 +/- 0.22 ppbV (winter) and 0.07 +/- 0.06 ppbV (summer) for monoterpenes. Isoprene in the summer and monoterpenes in the winter, as observed at the five heights, showed significant mutual correlations. In the winter monoterpenes were positively correlated with combustion tracers CO and acetonitrile at 3 m, suggesting possible anthropogenic sources"
Keywords:		Air Pollutants/*analysis Beijing Environmental Monitoring Monoterpenes/analysis Ozone/*analysis Volatile Organic Compounds/*analysis Biogenic volatile organic compounds (BVOCs) Isoprene Monoterpenes Proton transfer reaction-time of flight-mass spectrometr;
Notes:		"MedlineZhang, Huina Zhang, Yanli Huang, Zhonghui Acton, W Joe F Wang, Zhaoyi Nemitz, Eiko Langford, Ben Mullinger, Neil Davison, Brian Shi, Zongbo Liu, Di Song, Wei Yang, Weiqiang Zeng, Jianqiang Wu, Zhenfeng Fu, Pingqing Zhang, Qiang Wang, Xinming eng Netherlands 2020/07/13 J Environ Sci (China). 2020 Sep; 95:33-42. doi: 10.1016/j.jes.2020.03.032. Epub 2020 May 1"