中国城市群臭氧时空分布特征分析

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Abstract In order to reveal the temporal and spatial distribution law of ozone in major urban agglomerations, the concentration data of 1215 stations in 243 cities of 2019, released by air quality monitoring website were used. The results showed that ozone pollution mainly occurred in June and July in summer, followed by late spring and early autumn, and almost no ozone pollution occurred in winter. The variation trend of ozone concentration with increases above 100μg/m³ in urban agglomerations roughly presented two categories of irregular "V" and "W". In 2019, two high-value concentration centers could be obviously extracted, which appeared in summer and autumn respectively. Further, the high-value concentration center in summer could be divided into two levels according to the severity of pollution. The concentration distribution of ozone in urban agglomeration showed autocorrelation characteristics:the hot spot area overlaping with the high value center in the north in summer, and being consistent with the high value center in the south in autumn, simultaneously, the area of the cold spot area reaching its maximum. Due to the complexity of the causes of ozone pollution, it is inappropriate to classify ozone pollution solely according to the existing circumstances of urban agglomerations classification. Formulating corresponding pollution prevention and control measures for different urban agglomerations according to the actual distribution is the key point.

Key words： ozone urban agglomeration the space-time characteristics spatial autocorrelation

Received: 03 November 2021

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X511

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	LIN Wen-peng
	GUO Xin-tong

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LIN Wen-peng,GUO Xin-tong. Spatial and temporal distribution characteristics of ozone in Urban agglomerations in China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2481-2494.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2481

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