Analysis of pollution characteristics and impact of sand and dust weather in the urban area and counties in Baoji City over the past three years
Purposes—To study the pollution characteristics and influencing factors of sand and dust weather in the urban area and counties in Baoji City over the past three years(2021-2023),and to probe into the change of PM10 concentration in the atmosphere and the influence of sand and dust on it.Methods—With the typical sand and dust weather over the past three years as an example,the spa-tial distribution,circulation pattern and change rule were analyzed on the basis of the real-time PM10 mass concentration,meteorological elements and radar monitoring data of automatic air quality moni-toring stations in the urban area and counties in Baoji City,and the cause and influence were analyzed in combination with typical cases.Results—The results showed that Baoji was most affected by the dust along the Northwest Road in Inner Mongolia and Xinjiang.Due to the presence of east wind,the funnelling effect is formed in the special terrain,and makes the sand and dust return and stay longer,thus leading to the occurrence of sand and dust floating weather in Baoji area for many times.In recent years,the sand and dust weather has shown a trend of decreasing first and then increasing.Conclu-sion—According to the characteristics of landform,climate and dust source in Baoji city,effective sci-entific suggestions for preventing dust weather or reducing the impact of dust are put forward,which provides scientific basis for improving the air quality in Baoji City.
Baoji Citydust weatherPM10climate characteristicsimpact systems
万方数据
维普
