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Atmosphere
Volume 15
Issue 5
10.3390/atmos15050519
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Open AccessArticle
by Xue Jiang Xue Jiang SciProfilesScilitPreprints.orgGoogle Scholar Xugeng Cheng Xugeng Cheng SciProfilesScilitPreprints.orgGoogle Scholar Jane Liu Jane Liu SciProfilesScilitPreprints.orgGoogle Scholar Zhixiong Chen Zhixiong Chen SciProfilesScilitPreprints.orgGoogle Scholar Hong Wang Hong Wang SciProfilesScilitPreprints.orgGoogle Scholar Huiying Deng Huiying Deng SciProfilesScilitPreprints.orgGoogle Scholar Jun Hu Jun Hu SciProfilesScilitPreprints.orgGoogle Scholar Yongcheng Jiang Yongcheng Jiang SciProfilesScilitPreprints.orgGoogle Scholar Mengmiao Yang Mengmiao Yang SciProfilesScilitPreprints.orgGoogle Scholar Chende Gai Chende Gai SciProfilesScilitPreprints.orgGoogle Scholar Zhiqiang Cheng Zhiqiang Cheng SciProfilesScilitPreprints.orgGoogle Scholar
1
Institute of Geography, School of Geographic Science, Fujian Normal University, Fuzhou 350117, China
2
Department of Geography and Planning, University of Toronto, Toronto, ON M5S 3G3, Canada
3
Fujian Key Laboratory of Disaster Weather, Fuzhou 354200, China
4
Nanping Meteorological Bureau, Jianyang 354200, China
5
Fujian Academy of Environmental Sciences, Fuzhou 350117, China
6
Xiamen Key Laboratory of Straits Meteorology, Xiamen Meteorological Bureau, Xiamen 361000, China
*
Author to whom correspondence should be addressed.
Atmosphere 2024, 15(5), 519; https://doi.org/10.3390/atmos15050519 (registeringDOI)
Submission received: 6 February 2024/Revised: 7 April 2024/Accepted: 18 April 2024/Published: 24 April 2024
(This article belongs to the Special Issue Characteristics and Source Apportionment of Urban Air Pollution)
Abstract
The ozone (O3) variations in southeast China are largely different between mountainous forest areas located inland, and lowland urban areas located near the coast. Here, we selected these two kinds of areas to compare their similarities and differences in surface O3 variability from diurnal to seasonal scales. Our results show that in comparison with the lowland urban areas (coastal areas), the mountainous forest areas (inland areas) are characterized with less human activates, lower precursor emissions, wetter and colder meteorological conditions, and denser vegetation covers. This can lead to lower chemical O3 production and higher O3 deposition rates in the inland areas. The annual mean of 8-h O3 maximum concentrations (MDA8 O3) in the inland areas are ~15 μg·m−3 (i.e. ~15%) lower than that in the coastal areas. The day-to-day variation in surface O3 in the two types of the areas is rather similar, with a correlation coefficient of 0.75 between them, suggesting similar influences on large scales, such as weather patterns, regional O3 transport, and background O3. Over 2016–2020, O3 concentrations in all the areas shows a trend of “rising and then falling”, with a peak in 2017 and 2018. Daily MDA8 O3 correlates with solar radiation most in the coastal areas, while in the inland areas, it is correlated with relative humidity most. Diurnally, during the morning, O3 concentrations in the inland areas increase faster than in the coastal areas in most seasons, mainly due to a faster increase in temperature and decrease in humidity. While in the evening, O3 concentrations decrease faster in the inland areas than in the coastal areas, mostly attributable to a higher titration effect in the inland areas. Seasonally, both areas share a double-peak variation in O3 concentrations, with two peaks in spring and autumn and two valleys in summer and winter. We found that the valley in summer is related to the summer Asian monsoon that induces large-scale convections bringing local O3 upward but blocking inflow of O3 downward, while the one in winter is due to low O3 production. The coastal areas experienced more exceedance days (~30 days per year) than inland areas (~5-10 days per year), with O3 sources largely from the northeast. Overall, the similarities and differences in O3 concentrations between inland and coastal areas in southeastern China are rather unique, reflecting the collective impact of geographic-related meteorology, O3 precursor emissions, and vegetation on surface O3 concentrations.
Keywords: O3 concentration; Southeast China; seasonal variation; diurnal variation
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MDPI and ACS Style
Jiang, X.; Cheng, X.; Liu, J.; Chen, Z.; Wang, H.; Deng, H.; Hu, J.; Jiang, Y.; Yang, M.; Gai, C.;et al. Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China. Atmosphere 2024, 15, 519.https://doi.org/10.3390/atmos15050519
AMA Style
Jiang X, Cheng X, Liu J, Chen Z, Wang H, Deng H, Hu J, Jiang Y, Yang M, Gai C,et al. Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China. Atmosphere. 2024; 15(5):519.https://doi.org/10.3390/atmos15050519
Chicago/Turabian Style
Jiang, Xue, Xugeng Cheng, Jane Liu, Zhixiong Chen, Hong Wang, Huiying Deng, Jun Hu, Yongcheng Jiang, Mengmiao Yang, Chende Gai,and et al. 2024. "Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China" Atmosphere 15, no. 5: 519.https://doi.org/10.3390/atmos15050519
Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.
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MDPI and ACS Style
Jiang, X.; Cheng, X.; Liu, J.; Chen, Z.; Wang, H.; Deng, H.; Hu, J.; Jiang, Y.; Yang, M.; Gai, C.;et al. Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China. Atmosphere 2024, 15, 519.https://doi.org/10.3390/atmos15050519
AMA Style
Jiang X, Cheng X, Liu J, Chen Z, Wang H, Deng H, Hu J, Jiang Y, Yang M, Gai C,et al. Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China. Atmosphere. 2024; 15(5):519.https://doi.org/10.3390/atmos15050519
Chicago/Turabian Style
Jiang, Xue, Xugeng Cheng, Jane Liu, Zhixiong Chen, Hong Wang, Huiying Deng, Jun Hu, Yongcheng Jiang, Mengmiao Yang, Chende Gai,and et al. 2024. "Comparison of Surface Ozone Variability in Mountainous Forest Areas and Lowland Urban Areas in Southeast China" Atmosphere 15, no. 5: 519.https://doi.org/10.3390/atmos15050519
Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.
Atmosphere,EISSN 2073-4433,Published by MDPI
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