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Unmanned Aerial Vehicle Measurements of Volatile Organic Compounds over a Subtropical Forest in China and Implications for Emission Heterogeneity
Li, Yaowei1; Liu, Ben2; Ye, Jianhuai3; Jia, Tianjiao1; Khuzestani, Reza Bashiri1; Sun, Jia Yin4,5; Cheng, Xi1; Zheng, Yan1; Li, Xin1; Wu, Cheng4,5; Xin, Jinyuan6; Wu, Zhihong7; Tomoto, Matheus Akira3; McKinney, Karena A.8; Martin, Scot T.3,9; Li, Yong Jie2; Chen, Qi1
2021-02-18
Source PublicationACS Earth and Space Chemistry
ISSN2472-3452
Volume5Issue:2Pages:247-256
Abstract

Volatile organic compounds (VOCs) are important pollutants that affect air quality and atmosphere-ecosystem interactions. Atmospheric sampling onboard a multicopter unmanned aerial vehicle (UAV), serving as an economical and flexible measurement technique, collects valuable VOC data sets at intermediate spatial scales of hundreds of meters. In this study, we deployed a UAV-based VOC sampler in South China and conducted VOC samplings at two locations over the canopy of a subtropical forest. The collected VOC samples were analyzed offline by gas chromatography-mass spectrometry. Isoprene and α-pinene, two dominant biogenic VOCs, showed day-to-night variations that were consistent with their emission patterns. High concentrations of ozone and aromatic VOCs indicate a strong influence of anthropogenic pollution in this forest area. Meanwhile, high ratios of the concentrations of methacrolein and methyl vinyl ketone to isoprene were observed, which are consistent with the possibly fast atmospheric oxidation under the anthropogenic influence. Significant daytime concentration differences were observed between the two sampling locations for isoprene. The analysis by a gradient transport model suggests a large isoprene emission heterogeneity along the mountain slope at the scale of hundreds of meters for subtropical forests, which has not yet been well represented in most biosphere emission models. Strong eddy diffusion caused by the valley breeze may also contribute to the observed concentration differences.

KeywordAnthropogenic Influence Emission Heterogeneity Subtropical Forest Uav Measurements Vocs
DOI10.1021/acsearthspacechem.0c00271
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Geochemistry & Geophysics
WOS SubjectChemistry, Multidisciplinary ; Geochemistry & Geophysics
WOS IDWOS:000621420200009
Scopus ID2-s2.0-85101703295
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Citation statistics
Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorLi, Yong Jie; Chen, Qi
Affiliation1.State Key Joint Laboratory of Environmental Simulation and Pollution Control, BIC-ESAT, IJRC, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, 999078, Macao
3.School of Engineering and Applied Sciences, Harvard University, Cambridge, 02138, United States
4.Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou, 510632, China
5.Guangdong Prov. Engineering Research Center for On-line Source Apportionment System of Air Pollution, Guangzhou, 510632, China
6.State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
7.Guangdong Chebaling National Nature Reserve, Shaoguan, Guangdong, 512000, China
8.Department of Chemistry, Colby College, Waterville, 04901, United States
9.Department of Earth and Planetary Sciences, Harvard University, Cambridge, 02138, United States
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Li, Yaowei,Liu, Ben,Ye, Jianhuai,et al. Unmanned Aerial Vehicle Measurements of Volatile Organic Compounds over a Subtropical Forest in China and Implications for Emission Heterogeneity[J]. ACS Earth and Space Chemistry,2021,5(2):247-256.
APA Li, Yaowei,Liu, Ben,Ye, Jianhuai,Jia, Tianjiao,Khuzestani, Reza Bashiri,Sun, Jia Yin,Cheng, Xi,Zheng, Yan,Li, Xin,Wu, Cheng,Xin, Jinyuan,Wu, Zhihong,Tomoto, Matheus Akira,McKinney, Karena A.,Martin, Scot T.,Li, Yong Jie,&Chen, Qi.(2021).Unmanned Aerial Vehicle Measurements of Volatile Organic Compounds over a Subtropical Forest in China and Implications for Emission Heterogeneity.ACS Earth and Space Chemistry,5(2),247-256.
MLA Li, Yaowei,et al."Unmanned Aerial Vehicle Measurements of Volatile Organic Compounds over a Subtropical Forest in China and Implications for Emission Heterogeneity".ACS Earth and Space Chemistry 5.2(2021):247-256.
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