Abstract
The geographical condition of Qingdao, China is relatively special; the transport of various inland pollutants, the emissions of marine aerosol and local pollutants will have an impact on the changes of atmospheric aerosol concentration. By using the stability classification method, trajectory clustering analysis and the NOAA HYSPLIT model, the seasonal distribution characteristics of atmospheric inhalable particulate matter concentration in Qingdao, China and its relationship with meteorological conditions, mixed layer height, and the seasonal characteristics of Qingdao pollutant transport were analyzed. The results show that the variation trends of PM2.5 and PM10 were about the same, and there are obvious seasonal differences, which are high in winter and spring, and low in summer and autumn. The concentration of inhalable particulate matter has a negative correlation with temperature, wind speed and relative humidity. The concentration of inhalable particulate matter is distinct in different relative humidity ranges. When the wind speed is less than 3 - 4 m/s, there are more inhalable particles, while the mass concentration shows obvious reduction with the wind speed more than 4 m/s. There is a significant negative correlation between the mass concentration of pollutants and the daily maximum mixed layer height. The larger the concentration of pollutants, the smaller the thickness of the daily largest mixed layer. Conversely, the smaller the mass concentration of pollutants, the larger the thickness of the daily largest mixed layer. The pollutant transport in Qingdao has obvious seasonal characteristics. The air mass in spring, autumn and winter is mainly medium-long distance transport from Mongolia and southern Russia, and medium-short distance transport from Inner Mongolia and northeast of China. The source of air masses in summer is mainly transported from the eastern and sea areas.
Highlights
Qingdao is located in the southern part of Shandong Peninsula, according to the Qingdao Environmental Status Bulletin during 2012-2015, the number of days with good air quality in Qingdao is more than 260, the proportion of days with particulate matter as the primary pollutant is still high, whose ratio was as high as 97.2% in 2014. Han et al (2014), Wan et al (2015), and Song et al (2016) pointed out that there was continuous pollution in Qingdao during the winter of 2013-2015, which was severe in 2014
The results show that the variation trends of PM2.5 and PM10 were about the same, and there are obvious seasonal differences, which are high in winter and spring, and low in summer and autumn
The variation trend of PM10 and PM2.5 mass concentration is about the same, and there are obvious seasonal differences, which are high in winter and spring, low in summer and autumn
Summary
Qingdao is located in the southern part of Shandong Peninsula, according to the Qingdao Environmental Status Bulletin during 2012-2015, the number of days with good air quality in Qingdao is more than 260, the proportion of days with particulate matter as the primary pollutant is still high, whose ratio was as high as 97.2% in 2014. Han et al (2014), Wan et al (2015), and Song et al (2016) pointed out that there was continuous pollution in Qingdao during the winter of 2013-2015, which was severe in 2014. Among the pollutants in Qingdao, inhalable particulate matter of PM2.5 and PM10 accounts for a large proportion. Many experts and scholars researched air pollution in Qingdao, which mainly focuses on human health assessment (Hu, 2003), pollution status investigation (Wang & Gao, 2008) and prevention countermeasures research (Wang & Guo, 1999; Li, 2006) and marine factors on the contribution of atmospheric aerosols (Xu & Yao, 1997) and sedimentation flux (Chen et al, 2004); they analyzed the relationship between inhalable particulate matter and meteorological elements (Ke et al, 2014; Huang et al, 2015; Kang et al, 2016)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
