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Chen X, Gong D, Lin Y, Xu Q, Wang Y, Liu S, Li Q, Ma F, Li J, Deng S, Wang H, Wang B. Emission characteristics of biogenic volatile organic compounds in a subtropical pristine forest of southern China. J Environ Sci (China) 2025; 148:665-682. [PMID: 39095198 DOI: 10.1016/j.jes.2023.09.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 08/04/2024]
Abstract
Emission characteristics of biogenic volatile organic compounds (BVOCs) from dominant tree species in the subtropical pristine forests of China are extremely limited. Here we conducted in situ field measurements of BVOCs emissions from representative mature evergreen trees by using dynamic branch enclosures at four altitude gradients (600-1690 m a.s.l.) in the Nanling Mountains of southern China. Composition characteristics as well as seasonal and altitudinal variations were analyzed. Standardized emission rates and canopy-scale emission factors were then calculated. Results showed that BVOCs emission intensities in the wet season were generally higher than those in the dry season. Monoterpenes were the dominant BVOCs emitted from most broad-leaved trees, accounting for over 70% of the total. Schima superba, Yushania basihirsuta and Altingia chinensis had relatively high emission intensities and secondary pollutant formation potentials. The localized emission factors of isoprene were comparable to the defaults in the Model of Emissions of Gases and Aerosols from Nature (MEGAN), while emission factors of monoterpenes and sesquiterpenes were 2 to 58 times of those in the model. Our results can be used to update the current BVOCs emission inventory in MEGAN, thereby reducing the uncertainties of BVOCs emission estimations in forested regions of southern China.
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Affiliation(s)
- Xi Chen
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Daocheng Gong
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, China; Australia-China Centre for Air Quality Science and Management (Guangdong), Guangzhou 511443, China
| | - Youjing Lin
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Hainan Provincial Ecological and Environmental Monitoring Center, Haikou 571126, China
| | - Qiao Xu
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Yujin Wang
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Shiwei Liu
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Qinqin Li
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Fangyuan Ma
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Jiangyong Li
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Shuo Deng
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
| | - Hao Wang
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, China; Australia-China Centre for Air Quality Science and Management (Guangdong), Guangzhou 511443, China.
| | - Boguang Wang
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests, China; Australia-China Centre for Air Quality Science and Management (Guangdong), Guangzhou 511443, China.
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Liu L, Seyler BC, Liu H, Zhou L, Chen D, Liu S, Yan C, Yang F, Song D, Tan Q, Jia F, Feng C, Wang Q, Li Y. Biogenic volatile organic compound emission patterns and secondary pollutant formation potentials of dominant greening trees in Chengdu, southwest China. J Environ Sci (China) 2022; 114:179-193. [PMID: 35459483 DOI: 10.1016/j.jes.2021.08.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 06/14/2023]
Abstract
Integral to the urban ecosystem, greening trees provide many ecological benefits, but the active biogenic volatile organic compounds (BVOCs) they release contribute to the production of ozone and secondary organic aerosols, which harm ambient air quality. It is, therefore, necessary to understand the BVOC emission characteristics of dominant greening tree species and their relative contribution to secondary pollutants in various urban contexts. Consequently, this study utilized a dynamic enclosure system to collect BVOC samples of seven dominant greening tree species in urban Chengdu, Southwest China. Gas chromatography/mass spectrometry was used to analyze the BVOC components and standardized BVOC emission rates of each tree species were then calculated to assess their relative potential to form secondary pollutants. We found obvious differences in the composition of BVOCs emitted by each species. Ficus virens displayed a high isoprene emission rate at 31.472 μgC/(gdw (g dry weight)•hr), while Cinnamomum camphora emitted high volumes of D-Limonene at 93.574 μgC/(gdw•hr). In terms of the BVOC emission rates by leaf area, C. camphora had the highest emission rate of total BVOCs at 13,782.59 μgC/(m2•hr), followed by Cedrus deodara with 5466.86 μgC/(m2•hr). Ginkgo biloba and Osmanthus fragrans mainly emitted oxygenated VOCs with lower overall emission rates. The high BVOC emitters like F. virens, C. camphora, and Magnolia grandiflora have high potential for significantly contributing to environmental secondary pollutants, so should be cautiously considered for future planting. This study provides important implications for improving urban greening efforts for subtropical Chinese urban contexts, like Chengdu.
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Affiliation(s)
- Liping Liu
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China; College of Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Barnabas C Seyler
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Hefan Liu
- Chengdu Academy of Environmental Sciences, Chengdu 610000, China
| | - Li Zhou
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
| | - Dongyang Chen
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Song Liu
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Chang Yan
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Fumo Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Danlin Song
- Chengdu Academy of Environmental Sciences, Chengdu 610000, China
| | - Qinwen Tan
- Chengdu Academy of Environmental Sciences, Chengdu 610000, China
| | - Fengju Jia
- Chengdu Ecological and Environmental Monitoring Center, Chengdu 610000, China
| | - Cheng Feng
- Chengdu Ecological and Environmental Monitoring Center, Chengdu 610000, China
| | - Qiuwei Wang
- Longquanyi Ecology and Environment Bureau, Chengdu 610000, China
| | - Yunchun Li
- College of Science, Sichuan Agricultural University, Ya'an 625014, China
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