唐山市大气颗粒物和O<sub>3</sub>多尺度变化及影响因素

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Abstract The methods of Kolmogorov-Zurbenko filtering, stepwise multiple linear regression and wavelet coherence analysis were used to explore the evolution characteristics of PM_2.5, PM₁₀ and O₃ at different time scales from 2015 to 2022 in Tangshan City, and to effectively distinguish and quantitatively estimate the contributions of pollution source emissions and meteorological factors to pollutant concentrations. Meanwhile, the impacts of meteorological factors on pollutants at different time scales and the synergistic mechanism between PM_2.5, PM₁₀ and O₃ were revealed. The long-term component of PM_2.5 and PM₁₀ concentrations in Tangshan showed a significant downward trend during the study period, and the seasonal component and short-term component showed different periodic-fluctuations. The long-term component of O₃ concentration slightly changed, and its seasonal component and short-term component changed dramatically between May and July every year. The variations of long-term components of PM_2.5 and PM₁₀ were mainly controlled by source emission factors, which accounted for more than 90%, while the long-term component of O₃ was controlled by source emission and meteorological factors simultaneously, with the contribution ratio being about 2:3. Meteorological factors such as temperature, relative humidity, surface vertical wind speed and precipitation presented positive effects on PM_2.5 at small time scales and negative effects at large time scales. Temperature and shortwave radiation intensity had positive effects on O₃, however, coherence between PM_2.5, PM₁₀ and O₃ displayed positive effects at small time scales and negative effects at large time scales.

Key words： particulate matter O₃ KZ filter wavelet coherence contribution influencing factors

Received: 25 July 2023

PACS:

X513

Corresponding Authors: 韩力慧,副教授,hlh@bjut.edu.cn E-mail: hlh@bjut.edu.cn

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	HAN Li-hui
	LAN Tong
	CHENG Shui-yuan
	WANG Shen-ao
	TIAN Jian
	QI Chao-nan
	XIAO Qian
	WANG Hai-yan
	HAN Deng-yue
	WANG Ying-ao

Cite this article:

HAN Li-hui,LAN Tong,CHENG Shui-yuan等. The variations and influencing factors of atmospheric particulate matter and O₃ at multiple scales in Tangshan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1185-1194.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1185

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