气候变化领域集成服务门户(CCPortal): The role of natural factors in constraining long-term tropospheric ozone trends over Southern China

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DOI	10.1016/j.atmosenv.2019.117060
	The role of natural factors in constraining long-term tropospheric ozone trends over Southern China
	Chen X.; Zhong B.; Huang F.; Wang X.; Sarkar S.; Jia S.; Deng X.; Chen D.; Shao M.
发表日期	2020
ISSN	1352-2310
卷号	220
英文摘要	Southern China has experienced severe photochemical pollution events in recent years, and the tropospheric ozone has emerged as the major pollutant of concern. Despite some recent efforts, the role of natural factors in constraining long-term trends of ozone in this region is poorly understood. In this study, we addressed this issue using tropospheric column ozone (TCO) datasets (2005–2017) from the Ozone Monitoring Instrument/Microwave Limb Sounder (OMI/MLS) and surface ozone datasets from 16 monitoring stations in Southern China (2006–2016). Consequently, we studied the influence of atmospheric dynamical factors, such as solar cycle, El-Nino Southern Oscillation (ENSO), Quasi-Biennial Oscillation (QBO), and Arctic Oscillation (AO), and local-scale meteorological factors, such as precipitation, surface temperature, planetary boundary layer height, and horizontal winds, on regional ozone trends. Stepwise multivariate regression analysis and harmonic function fitting were adopted to quantitatively simulate the influence of these natural drivers on ozone change. We found that within our research periods, both surface ozone and TCO in Southern China had a significant upward trend, with slopes of 0.97% y−1 (0.23 ppbv y−1) and 0.82% y−1 (0.28 DU y−1), respectively. Natural factors explained 44.4% of the TCO uptrend and 27.0% of the surface ozone uptrend. Among the natural factors, the solar cycle plays the most important role in tropospheric and surface ozone modulation. Its 11-year cycle had a large impact on TCO for 2–7 DU and on surface ozone for 3–8 ppbv. However, the ENSO, QBO, and AO indices did not affect tropospheric ozone trends significantly. In addition, we showed that precipitation and wind fields associated with the Asian summer monsoon played a critical role in lowering ozone levels over Southern China, accounting for 24.8% and 81.5% of summertime TCO and surface ozone variability, respectively. Finally, a significant fraction of TCO and surface ozone uptrends (55.6% and 73.0%, respectively) remained unexplained even after consideration of these natural factors in the periods 2005–2017 and 2006–2016, respectively. These unexplained factors are most likely related to anthropogenic emissions and should be studied further. © 2019 Elsevier Ltd
关键词	Asian summer monsoon Solar cycle Surface wind Tropospheric ozone Wet deposition
语种	英语
scopus关键词	Atmospheric boundary layer; Atmospheric pressure; Atmospheric thermodynamics; Boundary layer flow; Climatology; Harmonic functions; Multivariant analysis; Ozone; Ozone layer; Regression analysis; Solar energy; Troposphere; Ultraviolet spectrometers; Asian summer monsoons; Solar cycle; Surface winds; Tropospheric ozone; Wet deposition; Air pollution; ozone; Arctic Oscillation; atmospheric pollution; boundary layer; El Nino-Southern Oscillation; instrumentation; monsoon; ozone; photochemistry; precipitation (climatology); quasi-biennial oscillation; solar cycle; surface wind; troposphere; wet deposition; Article; boundary layer; China; modulation; North Atlantic oscillation; oscillation; precipitation; priority journal; solar cycle; surface property; temperature; troposphere; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249496
作者单位	School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; National Satellite Meteorological Center, Beijing, 100081, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511486, China; Department of Earth Sciences, Centre for Climate and Environmental Studies, Indian Institute of Science Education and Research (IISER) – Kolkata, Nadia, West Bengal 741246, India; The Institute of Tropical and Marine Meteorology, CMA, Guangzhou, 510640, China; Guangdong Environmental Monitoring Center, State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangzhou, 510308, China; School of Atmospheric Sciences, & Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, 510275, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China
推荐引用方式 GB/T 7714	Chen X.,Zhong B.,Huang F.,et al. The role of natural factors in constraining long-term tropospheric ozone trends over Southern China[J],2020,220.
APA	Chen X..,Zhong B..,Huang F..,Wang X..,Sarkar S..,...&Shao M..(2020).The role of natural factors in constraining long-term tropospheric ozone trends over Southern China.ATMOSPHERIC ENVIRONMENT,220.
MLA	Chen X.,et al."The role of natural factors in constraining long-term tropospheric ozone trends over Southern China".ATMOSPHERIC ENVIRONMENT 220(2020).