济南市四季PM_(10)、PM_(2.5)输送来源及其传输过程  

Transportation Source and Transportation Process of PM_(10) and PM_(2.5) in Seasons of Jinan

作　　者：王珏[1] 王郭臣 陈莉[1] 

机构地区：[1]天津师范大学城市与环境科学学院,天津300387

出　　处：《环境科学与技术》2015年第5期175-182,共8页Environmental Science & Technology

基　　金：国家青年科学基金项目(41205101)

摘　　要：利用HYSPLIT模型计算出济南市2012年全年逐日72 h的气流后向轨迹。对四季的气流轨迹做聚类分析得到抵达济南市的5种轨迹类型,结合PM10、PM2.5的日均浓度资料,计算潜在源的贡献作用和浓度权重轨迹,得到影响济南市四季PM10和PM2.5浓度的潜在源区以及不同潜在源区,对济南市四季的PM10和PM2.5浓度的贡献。结果表明:四季PM10的潜在源区和PM2.5的潜在源区分布大体相同。四季的PM10和PM2.5的潜在源区都包括济南市的周边地区,该区域对济南市日均的ρ(PM10)和ρ(PM2.5)的贡献分别在0.1、0.06 mg/m3以上。春季,2种污染物的潜在源区为江苏北部源区。夏季,其污染物潜在源区为山东省南部源区与江苏北部源区。秋季,2种污染物的潜在源区主要分布在河北南部、河南东部、江苏北部等地区;冬季,其污染物潜在源区主要分布在津冀鲁交界地区、河南东部、安徽北部等地区。HYSPLIT model was used to calculate the dally 72 h backward trajectories of Jinan in 2012. Cluster analysis was used to categorize the season＇s backward trajectories. Then five kinds of airflow trajectories were obtained. Potential source contribution function（PSCF） model and concentration-weighted trajectory（CWT） method were used to evaluate the transpor- tation pathways and potential source regions of Jinan PM10 and PM2.5 pollution in seasons.The results showed the potential source regions of PM10 pollution were similar to PM2s pollutions. And the potential source regions of PM10 and PM2.5 pollution in seasons were both included the surrounding areas of Jinan, which contributed more than 0.1 and 0.06 mg/ma to the daily average concentration of PM10 and PM2.5 in Jinan. In spring, the north of Jiangsu Province was the potential source region of Jinan PM10 and PM2.5 pollution. In summer, their potential source regions were the southern Shandong Province and the north of Jiangsu Province. In fall, their potential source regions included the southern of Hebei Province, the east of Henan Province and the north of Jiangsu Province. In winter, their potential source regions included the junction of Tianjin, Hebei and Shandong, the east of Henan Province and the north of Anhui Province.

关 键 词：HYSPLIT模型 后向轨迹 聚类分析 潜在源区 济南 

分 类 号：X823[环境科学与工程—环境工程]