Properties of aerosol scattering and its influencing factors in semiarid areas of Inner Mongolia
Received date: 2023-08-29
Revised date: 2023-11-06
Online published: 2024-05-29
From observational data of scattering coefficients, the mass concentrations of aerosols and pollutants, and meteorological elements, collected from July 9, 2020 to July 8, 2023 in Xilinhot, the characteristics of aerosol scattering coefficients—including the variation over time, probability density distribution, and correlation with different types of aerosols and meteorological impact factors—are studied. Consequently, the scattering coefficient levels are classified. The results show that: (1) the overall level of aerosol scattering is relatively low, but the transport of dust aerosol in spring and the high frequency of temperature inversions in winter and at night may increase aerosol scattering. (2) The smaller the aerosol, the higher the correlation between aerosols and scattering coefficients, with the correlation coefficients following the order BC>PM2.5>PM10, although seasonal differences are observed. In addition, NO2 is an important factor in increasing scattering in autumn, whereas SO2 contributes to scattering in summer, autumn, and winter. (3) The increases in correlation coefficients are considered as the contribution rates of current meteorological factors to scattering coefficients, with contribution rates of between 1% and 2%.
YE Hu , PEI Hao , JIANG Yanfeng , NA Qing , ZHANG Liwei . Properties of aerosol scattering and its influencing factors in semiarid areas of Inner Mongolia[J]. Arid Zone Research, 2024 , 41(5) : 730 -741 . DOI: 10.13866/j.azr.2024.05.02
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