石河子市空气质量特征及其气象影响因素

Air Quality Characteristics and Meteorological InfluencingFactors in Shihezi

运用石河子市2015—2020年6种污染物浓度,研究了石河子市近6年空气质量及污染物浓度时间变化特征。结果显示:石河子市近6年空气质量有所改善,首要污染物主要以可吸入颗粒物和臭氧为主,并有明显的采暖期和非采暖期之分。冬季空气质量对全年空气质量优良天数占比为负贡献,各污染物浓度的峰值多出现在白天。分析石河子市相对湿度、气压、温度等气象要素和空气质量指数的相关性,并建立拟合方程,结果显示石河子市除冬季外其他时间最小相对湿度、最低气温和空气质量指数相关性较好,在预报空气质量过程中可重点考虑。

Based on the concentration of six pollutants from 2015 to 2020 in Shihezi,the temporal variation characteristics of air quality and pollutant concentrations in the past six years in Shihezi were studied.The results showed that the air quality improved in the past six years,and primary pollutants were inhalable particles and ozone,and there was difference between heating and non-heating periods.In winter,air quality hada negative propoertion of days with good air quality throughout the year,the peak concentration of pollutants appeared in the daytime.The correlation between meteorological elements such as relative humidity,air pressure,temperature and air quality index in Shihezi was analyzed,and the fitting equation was established.The results showed that the correlation between minimum relative humidity,minimum temperature and air quality index was good except winter,and the two meteorological elements can be considered priority in the air quality forecast.