ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Study on a Low Visibility Weather Event Based on Multi-Source Detection Data in Shihezi
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Abstract:
From January 1st to 17th, 2020, Shihezi experienced a persistent low visibility weather event. This study utilized tethered airships, microwave radiometers, ground-based lidars, and other equipment to conduct joint experiments to detect this event. The meteorological factors, atmospheric boundary layer characteristics, and the diurnal and daily variations of pollutants during this low visibility weather were analyzed. The results show:(1) An extended duration of haze phase alongside low atmospheric boundary layer height, significant inversion layer, and high pollutant concentration within the event. (2) The relationship between atmospheric boundary layer height variation and pollutant accumulation was significant, with a low atmospheric boundary layer height corresponding to low wind speed, high humidity, and high pollutant concentration. (3) Visibility averaged 1040m, with low surface wind speeds (lower 2m/s) and relative humidity between 71% and 92%. The atmospheric boundary layer exhibited a dry-above, moist-below structure, ranging from 230 to 500m, while aerosol pollutants were mainly between 150m and 450m. PM2.5 peaked at 319.7μg/m^3.(4) There was a negative correlation between relative humidity and PM2.5 concentration with visibility, with PM2.5 having a more significant impact on visibility. This study holds implications for haze monitoring and forecasting.
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Project Supported:
The Science and Technology Program of the Xinjiang Production and Construction Corps（2023AB036）；Basic Research Program of the Xinjiang Production and Construction Corps（2024DA015）；The Innovation Team Program for Priority Domains in Shihezi City, the 8th Division the Natural Science Foundation of Shandong Province（2024TD04）；Shandong Provincial Natural Science Foundation Project（ZR2024MD031）
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