【作者】 杨鹏； 李丽燕； 周静博； 靳伟； 陈静； 段浩；

【Author】 YANG Peng;Li Liyan;ZHOU Jing Bo;JIN Wei;CHEN Jing;DUAN Hao;Shijiazhuang Meteorological Bureau;Shijiazhuang Environmental Monitoring Center;Meteorological Bureau of Hebei Province;

【机构】 石家庄市气象局； 石家庄市环境监测中心； 河北省气象局；

【摘要】 利用CE-318太阳光度计、激光雷达、单颗粒气溶胶质谱仪并结合气象、环境监测资料对2015年4月15日石家庄市一次沙尘天气过程中的气溶胶光学特性及其来源进行分析研究。结果表明:此次沙尘过程中,气溶胶光学厚度AOD明显增加,Angstrom指数α明显下降,其体积浓度谱粗模态粒子大量增加,首要污染物以PM₁₀为主,均证实有大量沙尘粒子的入侵。通过分析激光雷达的垂直探测、污染物来源的后向轨迹模拟以及高空、地面天气图可以推断此次沙尘过程主要是由蒙古地区自高空向低空及近地面逐渐沉降,最终与本地污染源汇合使得污染物浓度大幅增加。对比分析激光雷达和太阳光度计反演的532nm气溶胶光学厚度,发现两者具有很高的相关度R²=0.623,激光雷达反演的光学厚度经过一定修正后基本可以满足业务需求,在业务中可以与太阳光度计相互配合使用。另外,对石家庄市气溶胶颗粒物成分进行源解析发现,15日生物质燃烧源和扬尘源的贡献大幅增加。利用极轨卫星监测石家庄周边火点分布情况发现13-14日石家庄西北部地区火点较多,大风沙尘过程使得西北部的生物质开放燃烧源等产生的气溶胶颗粒物成分向石家庄及南部地区输送,导致生物质燃烧源比重迅速升高。更多还原

【Abstract】 CE-318 sun photometer,laser radar,single particle aerosol mass spectrometer,combined with the meteorological and environmental monitoring data on April 15,2015 had been used to study aerosol optical characteristics and source apportionment of dust in Shi JiaZ huang.The results showed that,in the process of dust on April 15,aerosol optical thickness increased and angstrom index α decreased obviously.Besides,coarse mode of particle volume concentration increased and primary pollutants were PM₁₀.All of these confirmed that there had a lot of dust particles imported.Vertical detection of laser radar,backward trajectory of pollutant source and the weather analysis diagram of air and ground had been analyzed,the results could deduce dust particles from Mongolia region had been sinking to low air and near ground from high air gradually.Concentration of pollutants increased when dust particles and the local pollution sources had been merged.AOD of laser radar and CE-318 sun photometer at 532 nm had been contrasted,the results showed that they had the very high correlation,R² was0.623.AOD inverted by laser radar could apply to vocational operation.The composition of aerosol particles had been researched by single particle aerosol mass spectrometer,we found that proportion of biomass burning and dust rising rapidly.Using polar orbit satellite to monitor fire distribution,there were a lot of fires in northwest of Shi Jia Zhuang on April 13-14,aerosol particles produced by biomass burning in northwest had been transported to Shi Jia Zhuang and southern regions making the proportion of biomass burning source rising rapidly.更多还原