Analysis of Aqi Change Characteristics and Correlation With PM2.5 and Pm10 in Beijing-Tianjin-Hebei Region

Abstract

Abstract. The paper analyzed the variation characteristics of AQI and its correlation with PM2.5 and PM10 of in Beijing-Tianjin-Hebei region from July 2015 to July 2018 based on hours of pollutants in Beijing-Tianjin-Hebei region, using AQI calculation method and statistical correlation evaluation method. Results showed that:(1) The air quality compliance rate in Beijing-Tianjin-Hebei region was 67%, the average AQI was 97.6577, and the air quality was good. The distribution frequency of primary pollutants was PM2.5, followed by PM10, which accounts for 78.9% of the distribution frequency of the six major pollutants, indicated that PM2.5 and PM10 had a greater impact on the air quality of Beijing-Tianjin-Hebei. (2) The correlation between AQI and PM2.5 and PM10 was significantly positively correlated. R2 was 0.8225 and 0.7749, respectively, P < 0.01, indicated that both showed a greater impact on air quality. (3) AQI and PM2.5 and PM10 showed a gradual decrease trend at 9h–16h, ie 9h highest and 16h lowest. The AQI fluctuated between 94.2816 and 103.3562, indicated that the air quality at 9h–16h was good or slightly polluted. (4) The spatial distribution of AQI, PM2.5 and PM10 was characterized by low northwest and high southeast, and the southeastern part was gradually decreasing from 9h–16h. AQI was negatively correlated with elevation. The higher the elevation, the better the air quality, and the worse the air quality.

The Impact of Urban Built Environments on Elderly People’s Sense of Safety and Adaptation to Aging: A Case Study of Three Major Urban Agglomerations in China

“…Air pollution has seriously disrupted the production and life of Chinese citizens. The air pollution problem is particularly serious in BTH [65]. Second, the impact of individual health characteristics on elderly people's sense of safety in YRD is greater than that in BTH, while the impact in PRD is not significant.…”

Spatiotemporal Characteristics of Particulate Matters Concentration and Their Influence on Ambient Air Quality in Urban Regions of Khuzestan Province, Iran

“…The relationship between AQI and PM concentrations illustrated that the fine particle contamination of different cities of Khuzestan had significant air quality impacts. Similarly, Wang et al [73] evaluated the AQI variation trend and its possible relationship with PM 2.5 and PM 10 in the Beijing-Tianjin Hebei area from July 2015 to 2018. According to their findings, a significant positive correlation can be seen between AQI and PM 2.5 and PM10 (R 2 was 0.8225 and 0.7749, respectively, P<0.01) and PMs (PM 10 and PM 2.5 ) showed a larger impact on the air quality of Beijing-Tianjin-Hebei.…”