Institute of Systems Engineering, Dalian University of Technology, Dalian, China.
Sci Rep. 2020 Apr 29;10(1):7229. doi: 10.1038/s41598-020-64111-3.
In recent years, ozone (O) pollution in China has shown a worsening trend. Due to the vast territory of China, O pollution is a widespread and complex problem. It is vital to understand the current spatiotemporal distribution of O pollution in China. In this study, we collected hourly data on O concentrations in 338 cities from January 1, 2016, to February 28, 2019, to analyze O pollution in China from a spatiotemporal perspective. The spatial analysis showed that the O concentrations exceeded the limit in seven geographical regions of China to some extent, with more serious pollution in North, East, and Central China. The O concentrations in the eastern areas were usually higher than those in the western areas. The temporal analysis showed seasonal variations in O concentration, with the highest O concentration in the summer and the lowest in the winter. The weekend effect, which occurs in other countries (such as the USA), was found only in some cities in China. We also found that the highest O concentration usually occurred in the afternoon and the lowest was in the early morning. The comprehensive analysis in this paper could improve our understanding of the severity of O pollution in China.
近年来，中国的臭氧（O）污染呈加剧趋势。由于中国地域辽阔，臭氧污染是一个广泛而复杂的问题。了解中国臭氧污染的时空分布情况至关重要。本研究收集了 2016 年 1 月 1 日至 2019 年 2 月 28 日 338 个城市的每小时臭氧浓度数据，从时空角度分析了中国的臭氧污染情况。空间分析表明，中国七个地理区域的臭氧浓度在一定程度上超过了限值，北方、东部和中部地区的污染更为严重。东部地区的臭氧浓度通常高于西部地区。时间分析表明臭氧浓度存在季节性变化，夏季臭氧浓度最高，冬季最低。其他国家（如美国）存在的周末效应仅在我国部分城市出现。我们还发现，最高臭氧浓度通常出现在下午，最低浓度出现在清晨。本文的综合分析可以提高我们对中国臭氧污染严重程度的认识。
