Analysis on mass concentration of dust aerosols in rough terrains of the Taklimakan Desert Hinterland

A three-month experiment (June-August 2019) had been carried out on the undulating terrain of the Taklimakan Desert. The mass concentration characteristics of PM_2.5 and PM₁₀ at different locations of the sand ridge were obtained, studying the correlation between dust aerosol mass concentration and meteorological factors under different weather conditions. The results show that: (1) There are differences about the concentration of PM_2.5 and PM₁₀ in different locations of sand ridges under different typical weather conditions. The average mass concentration of PM_2.5 on sunny days meets: West Low Site > East Low Site > High Site, According to the dynamic  characteristic of PM₁₀, peak-valley value of the three stations fluctuated sharply, and the daily average value of mass concentration shows: High Site > East Low Site > West Low Site. When the sand blowing and floating weather occurred, the variation of PM_2.5 mass concentration meet the following rule: East Low Site > High Site, PM₁₀ shows the opposite law. When the first sandstorm occurs, the PM_2.5 mass concentration satisfies the following Law: West Low Site 10 mass concentration change is generally expressed as: West Low Site 2.5 and PM₁₀ meets: West Low Site> High Site> East Low Site (2) Sunny Temperature、 Atmospheric Pressure, Relative Humidity of east low site, high site have a close correlation with PM_2.5, PM₁₀ Mass Concentrations, the wind speed of the west low site and the high site was significantly correlated with the PM_2.5 and PM₁₀ mass concentrations. When the dusty weather occurs, the wind speed has a significant effect on the mass concentration of dust aerosol in the high site, and there is a significant positive correlation between the atmospheric pressure and the aerosol mass concentration in the east low site or high site. During the sand-dust weather , the PM_2.5 and PM₁₀ mass concentrations were significantly negatively correlated with the atmospheric pressure in the high sand dunes, the correlation between wind speed and the PM_2.5 and PM₁₀ mass concentrations was greater than the East low Site. During the sandstorm, atmospheric pressure and temperature have a significant effect on the mass concentration of PM_2.5 and PM_10.