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DOI	10.1016/j.atmosenv.2021.118378
	Unexpected seasonal variations and high levels of ozone observed at the summit of Nanling Mountains: Impact of Asian monsoon on southern China
	Wang Y.; Shen J.; Wang H.; Wu G.; Chen Y.; Liu T.; Gong D.; Ou J.; Shi Y.; Zhang T.; He C.; Chen D.; Wang B.
发表日期	2021
ISSN	1352-2310
卷号	253
英文摘要	Five-year continuous O3 measurements were conducted for the first time at the summit of Nanling Mountains (112.88° E, 24.68° N, 1690 m a.s.l), southern China in 2013–2017. Unlike most mountains over the world with O3 maximum in spring or summer, Nanling showed O3 maximum in mid-autumn (October; 62.8 ± 0.7 ppbv, ± 95% confidence intervals) and minimum in summer (July; 46.6 ± 0.7 ppbv). This distinct seasonal cycle of O3 at Nanling was mainly caused by the special impact of Asian monsoon in southern China, which brought clean maritime background air and fresh emissions of the Pearl River Delta (PRD) region in spring/summer, and polluted northern continental air masses in autumn/winter, respectively. Further comparisons found that O3 of Nanling in four seasons were all higher than other similar mountainous background sites, making the annual mean of O3 (55.0 ± 0.2 ppbv) at Nanling the second highest that ever reported in the mountainous sites worldwide. Moreover, the diurnal variation showed the higher impact of regional transport during nighttime from the free troposphere (FT) and presented the potential air exchange between the FT and local atmosphere in the plenary boundary layer on the summit of Nanling. Both the seasonal variation and high O3 level indicated a strong impact of anthropogenic emissions from alternatively PRD/northern China on O3 pollution in this mountainous background region. This study diversifies the seasonal variations among mountains over the world, and also illustrates the complicated impact of anthropogenic emissions on the mountainous atmosphere in southern China. © 2021 Elsevier Ltd
关键词	Diurnal variation Nanling national background site O3 PRD Seasonal variation
语种	英语
scopus关键词	Atmospheric thermodynamics; Boundary layers; River pollution; Anthropogenic emissions; Asian monsoon; Confidence interval; Diurnal variation; Free troposphere; Nanling national background site; O3; Pearl River delta; Seasonal variation; Southern China; Landforms; ozone; anthropogenic effect; background level; boundary layer; diurnal variation; emission; monsoon; observational method; ozone; seasonal variation; troposphere; air monitoring; air pollutant; air quality; airflow; altitude; Article; autumn; boundary layer; China; circadian rhythm; comparative study; dry deposition; environmental temperature; forest; human activities; latitude; monsoon climate; priority journal; seasonal variation; South China Sea; spring; summer; troposphere; winter; China; Guangdong; Nanling; Zhujiang Delta
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/248469
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China; State Environmental Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Protection Key Laboratory of Secondary Air Pollution Research, Guangdong Ecological Environmental Monitoring Center, Guangdong, Guangzhou 510308, China; Shaoguan Ecological Environmental Monitoring Central Station, Shaoguan, 512026, China; JNU-QUT Joint Laboratory for Air Quality Science and Management, Jinan University, Guangzhou, 511443, China
推荐引用方式 GB/T 7714	Wang Y.,Shen J.,Wang H.,et al. Unexpected seasonal variations and high levels of ozone observed at the summit of Nanling Mountains: Impact of Asian monsoon on southern China[J],2021,253.
APA	Wang Y..,Shen J..,Wang H..,Wu G..,Chen Y..,...&Wang B..(2021).Unexpected seasonal variations and high levels of ozone observed at the summit of Nanling Mountains: Impact of Asian monsoon on southern China.ATMOSPHERIC ENVIRONMENT,253.
MLA	Wang Y.,et al."Unexpected seasonal variations and high levels of ozone observed at the summit of Nanling Mountains: Impact of Asian monsoon on southern China".ATMOSPHERIC ENVIRONMENT 253(2021).