Abstract：HYSPLIT model and global data assimilation system (GDAS) meteorological statistics were applied to analyze the 72-hour backward trajectories of daily airflow in Tianjin during 2012 December~2013 November. At the same time, cluster method was used to classify the airflow backward trajectory in different seasons. Moreover, the daily monitoring data of PM10 and NO2 from December 2012 to November 2013 were used to analyze the effects that airflow trajectory of different seasons have on the pollutants concentrations in Tianjin. The potential source contribution function (PSCF) analysis method and concentration-weighted trajectory (CWT) analysis method were applied to model the PSCF and CWT of PM10 and NO2 in different seasons. There was an obvious difference in the potential source area distribution of PM10 and NO2 owing to the airflow in different directions. Corresponding to the airflow, the highest values of PM10 and NO2 were concentrated in the inland airflow from northwest in winter, spring and autumn. However, the airflow trajectories in summer were mainly from northwest and southeast, which had less effect on the daily pollutants concentration value of PM10 and NO2. The PSCF of PM10 and NO2 in Tianjin has similar distribution properties to CWT, and the highest value of PM10 and NO2 was concentrated in Tianjin, Hebei and Shandong province, which were the main potential source area of these two main pollutants.
王郭臣, 王珏, 信玉洁, 陈莉. 天津PM10和NO2输送路径及潜在源区研究[J]. 中国环境科学, 2014, 34(12): 3009-3016.
WANG Guo-Chen, WANG Jue, XIN Yu-Jie, CHEN Li. Transportation pathways and potential source areas of PM10 and NO2 in Tianjin. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(12): 3009-3016.
