近10年中国三大经济区太阳总辐射特征及其与O<sub>3</sub>、PM<sub>2.5</sub>的关系

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Abstract

By using daily radiation data collected from ground meteorological observation stations (from 2007 to 2016) and daily observation data from China's air quality online monitoring platform (from 2014 to 2016), the paper analyzed recent 10-year annual and seasonal variations of global solar radiation (GSR), and recent 3-year frequency of pollution processes of the maximum 8hour average ozone (O_{3_8h_max}) and fine particles (PM_2.5) in Beijing-Tianjin-Hebei (BTH), the Yangtze River Delta (YRD) and the Pearl River Delta (PRD), respectively. The relationship among PM_2.5, O_{3_8h_max} and GSR according to statistics of different factors and intensity were discussed. The results showed that:GSR in BTH had increased significantly in recent 10years, spring GSR in BTH and summer GSR in PRD had increased significantly meanwhile. The annual frequency of PM_2.5 pollution processes in the three major economic regions had been decreasing year by year. Besides, the frequency decreased from north to south. The annual frequency of O₃ pollution processes had decreased firstly but then increased temporally, which was more significantly in BTH compared to that in YRD and PRD. The correlation coefficients between O_{3_8h_max} and GSR in the three economic regions were all above 0.71, reflecting a strong positive correlation, while the correlation between PM_2.5 and GSR depicts regional differences. The correlation between O_{3_8h_max} and PM_2.5 under different GSR in different seasons in the three major economic regions was significantly different. In BTH, positive correlation could be found under strong GSR in spring, summer and autumn, while negative correlation was seen in winter. The correlation was weak in all four seasons in YRD. Last but not least, noticeable positive correlation could be found in the summer of PRD. The linear fitting effect of O_{3_8h_max} and GSR under different PM_2.5 concentrations in the three economic regions was well, reflecting a strong positive correlation. The fitting reaches maximum when PM_2.5 concentration was over 75 μg/m³. The tendency of the line fitting increases with the increase of PM_2.5 interval.

Key words： global solar radiation (GSR) O₃ PM_2.5 relationship China's three major economic region

Received: 15 November 2017

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	LIU Chang-huan
	DENG Xue-jiao
	ZHU Bin
	YIN Chang-qin

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LIU Chang-huan,DENG Xue-jiao,ZHU Bin等. Characteristics of GSR of China's three major economic regions in the past 10 years and its relationship with O₃ and PM_2.5[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(8): 2820-2829.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I8/2820

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