Abstract
In order to study the impact of different intensity of sandstorm dew on air quality in Gansu Province, this paper selects sandstorm weather, sandy weather and floating dust weather, and combines the OMI data of various pollutants, ground observation data, and BenMAP-CE health modeling analysis, to explore the evolution characteristics of various pollutants under different sandstorms and dusty weather, and the impact on human health. The results indicate that during dust storms, blowing sand, and floating dust weather conditions, the maximum concentrations of PM10 in Gansu Province are 20, 7, and 4 times the threshold for mild pollution, respectively. The maximum concentrations of PM2.5 are 10, 5, and 3 times the threshold for mild pollution. Under dust storm conditions, the NO2, and O3 concentrations are 3.1 and 1.6 times the conventional values, respectively. Under blowing sand conditions, the NO2, and O3 concentrations are 2.7 and 4.1 times the conventional values. Under floating dust conditions, the NO2 and O3 concentrations are 3.1 and 1.9 times the conventional values. This study finds that based on the BenMap-CE model, the exposure-related mortality risks, including overall mortality, cardiovascular diseases, respiratory diseases, and lung cancer deaths, under the influence of dust weather in Gansu in 2021 are consistent. These risks are closely related to high concentrations of pollutants and the local population base. Therefore, paying attention to the assessment of air quality and the health of residents during dust weather is of great significance.