Abstract
Abstract. At present, the air environment in China is characterized by complex pollution. In this paper, the pollutant sources, transport paths and aerosol optical properties during the dust pollution was conducted to analyse based on ground-based lidar, space-borne sensor and atmospheric transmission model. Firstly, the NMMB/BSC-Dust model, the VIIRS-Suomi NPP date and HYSPLIT were carried out to analyse the dust transport paths and the dust particle size, and then the concentration of particles was analysed. Finally, the optical properties of aerosol particles in the dust weather were studied. During the formation of this weather, there is high dust in the Gobi and Taklamakan deserts. With the influence of wind direction, the dust moves from north to south, and the dust load significantly increased in southern China. Dust at the low altitude is generally transported from the Taklamakan Desert, while dust at the high altitude is generally transported from the Gobi Desert. The hourly average change of PM10 is from 36 μg/m3 to 818 μg/m3, while the hourly average change of PM2.5 is from 15 μg/m3 to 197 μg/m3. The dust was the main cause of the pollution weather. In this study, the formation process of the dust pollution revealed which can be used to provide guidance for government for the prevention work of dust pollution.
Highlights
Asian dust plays an important role in climate, ecosystem and air quality(Han et al, 2015; Liu et al, 2018; Mian et al, 2007)
In order to quantify the impact of Asian dust on the region and reduce the inaccuracy of the estimation of climate factors, this study combined ground-based lidar, space-borne sensor and atmospheric transmission model to analyse the dust weather in Huainan region on May 4-8, 2017
With the influence of wind direction, the dust moves from north to south, and the dust load significantly increased in southern China on May 5
Summary
Asian dust plays an important role in climate, ecosystem and air quality(Han et al, 2015; Liu et al, 2018; Mian et al, 2007). When large amounts of dust are injected into the atmosphere in a favourable climate, it can seriously affect human health and economic activities(Che et al, 2015; Chenbo et al, 2008; Gui et al, 2016). Because Asian dust travels long distances, its impact is global(Kulmala et al, 2015; Nie et al, 2015; Rong, 2015). When Asian dust enters an area, it often mixes with local pollutants, affecting the radiation-cloudclimate process(Kan et al, 2010; Yi et al, 2014). Due to China's rapid economic development, air quality has become a major factor affecting the environment and human health. From Mongolia and other areas of the impact of long-distance transport of dust, resulting in serious air pollution. In order to quantify the impact of Asian dust on the region and reduce the inaccuracy of the estimation of climate factors, this study combined ground-based lidar, space-borne sensor and atmospheric transmission model to analyse the dust weather in Huainan region on May 4-8, 2017
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