基于KZ滤波分析气象对珠三角臭氧趋势的影响

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Abstract Based on the ozone (O₃) monitoring data and reanalysis meteorological data in the Pearl River Delta (PRD) from 2015 to 2021, the Kolmogorov-Zurbenko (KZ) filter and stepwise multiple linear regression method were used to analyze the relationship between the long-term trend of O₃ and meteorological factors. This study quantified the contribution of meteorological and non-meteorological factors to the long-term trend of the maximum daily 8-hour average O₃ concentration (MDA8O₃) in the PRD. The results indicated a significant increase in MDA8O₃ in the PRD from 2015 to 2021, with particularly severe O₃ pollution in the summer and autumn. The KZ fitering method separated MDA8O₃ into three components: short-term, seasonal and long-term, accounting for 60.84%, 24.96% and 4.33% of the variance of the original sequence, respectively. These components were found to be independent of each other. The three components of MDA8O₃ are positively correlated with solar radiation, temperature and boundary layer height, and negatively correlated with cloud cover, relative humidity, wind speed and 850hPa meridional wind. Furthermore, meteorological and non-meteorological influences were found to explain approximately 64.3% (2.77μg/(m³a)) and 35.7% (1.53μg/(m³a)) of the long-term trend’s growth rate (4.29μg/(m³a)) of MDA8O₃, respectively.

Key words： Pearl River Delta(PRD) KZ filter ozone meteorology

Received: 02 September 2023

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X511

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	WU Shuang-shuang
	CHEN Zi-chao
	XUE Xin
	WU Yan-xing
	DONG Jun-jie
	LIU Run

Cite this article:

WU Shuang-shuang,CHEN Zi-chao,XUE Xin等. Analysis of meteorological effects on the trend of ozone in the Pearl River Delta using the KZ filtering method[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(4): 1905-1911.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I4/1905

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