2015年-2020年安康市空气质量演变特征及与气象因子的关系研究

Change Characteristics of Air Quality and Its Relationship with Meteorological Factors in Ankang,Qinba Mountains during 2015-2020

基于2015年-2020年安康市的空气质量监测资料和气象数据,揭示了大气污染物的特征及其与气象因子的关系。结果表明安康的空气质量6年来发生显著改善,AQI由74降到52,以轻度污染为主;首要污染物为PM_(2.5)、PM_(10)和O_(3),且不同季节首要污染物不同,各污染质量浓度随着年际变化呈降低趋势,冬、春季污染较为严重,1月份污染最为严重;从气象因子看,除O_(3)外,各主要大气污染物的质量浓度与主要气象因子之间均存在负相关关系,特别冬、春季节的降水量在1 mm<R≤5 mm之间时,对PM_(2.5)、PM_(10)的去除能力较强,能够对该时期的大气改善具有重要的作用。

Based on the air quality monitoring data and meteorological data of Ankang city from 2015 to 2020,the characteristics of air pollutants and the relationship between them and meteorological factors were revealed.The results showed that the air quality of Ankang improved significantly in the past six years,and the AQI decreased from 74 to 52.The primary pollutants are PM_(2.5),PM_(10) and O_(3),whichwere different in different seasons.Themass concentration of each pollution decreased with the inter-annual change.The pollution was more serious in winter and spring,especially in January.From the perspective of meteorological factors,except O_(3),there is a negative correlation between the mass concentration of major atmospheric pollutants and meteorological factors.Especially,when the precipitation in winter and spring is between 1 mm<R≤5 mm.The removal capacity of PM_(2.5) and PM_(10) is strong,which plays an important role in the atmospheric improvement in this period.