引用本文:何涛,叶香,彭燕,徐圃青,夏京.不同季节常州市气团来源差异性研究[J].环境监控与预警,2017,9(6):48-52
HE Tao, YE Xiang, PENG Yan, XU Pu qing, XIA Jing.[J].Environmental Monitoring and Forewarning,2017,9(6):48-52
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不同季节常州市气团来源差异性研究
何涛,叶香,彭燕,徐圃青,夏京
常州市环境监测中心,江苏 常州 213001
摘要:
利用NCEP全球再分析资料和HYSPLIT4模式,计算了2014年常州市不同季节的气流后向轨迹。结合聚类分析方法和常州市PM2.5、PM10、SO2、NO2和O3监测数据,分析了各季节不同类型气团来源对各污染物浓度的影响。结果表明,常州市的气团来源具有明显的季节性特征,春季以东北偏东方向的气团为主,西南气流对应的PM2.5和PM10平均值较高,分别为93和157μg/m3;夏季受海洋型气团影响为主,东南气团对应的O3平均值较高,为90μg/m3。秋季西北气流增多,其对应的PM2.5和PM10平均值较高,分别为71和107μg/m3,东南气团对应的SO2和NO2平均值较高,分别为40和43μg/m3;冬季受大陆型气团影响更显著,京津冀等北方气团和杭州湾方向的南面气团对应的PM2.5和PM10值较高,分别在100和150μg/m3以上。冬季随着空气污染加重,本地和本区域的气团逐渐占主导地位,说明加强长三角区域内的污染物协同管控,对于改善空气质量会具有明显的效果。
关键词:  大气污染  后向轨迹  聚类分析  传输路径  常州
DOI:
分类号:X513
文献标识码:B
基金项目:江苏省环境监测科研基金资助项目(1603)
HE Tao, YE Xiang, PENG Yan, XU Puqing, XIA Jing
Changzhou Environmental Monitoring Center, Changzhou, Jiangsu 213001, China
Abstract:
NCEP global reanalysis meteorological data and HYSPLIT4 model were used to compute the backward trajectory in different seasons of Changzhou in 2014. Combined with clustering method, the concentration data of PM2.5,PM10,SO2,NO2and O2in Changzhou were used to analyze the effect of air mass on the concentration of different pollutants in different seasons. It is found that the air mass in Changzhou showed an obvious seasonal characteristics. The air mass of ENE was the dominant in spring , and the PM2.5 and PM10 were higher in southwest airflow, which were 93 and 157 μg/m3, respectively. In summer, the air mass was mainly affected by the airflow from the ocean, and the average value of O3 was higher when the airflow from southeast, which was 90 μg/m3.During autumn, the Northwest airflow increased obviously, and the corresponding PM2.5 and PM10 values were higher, which were 71 and 107 μg/m3. The SO2 and NO2 values were higher when the airflow from southeast in autumn, which were 40 and 43 μg/m3. In winter, continental airflow had a significant effect on air quality in Changzhou. The PM2.5 and PM10 were relatively higher due to airflow from Jing jin ji regional or Hangzhou Bay, which were 100 and 150 μg/m3 above. As the increasing of air pollution in winter, the local air mass played a dominant role, which indicates that strengthen the control of pollution sources in the Yangtze River Delta region would be a significant effect on improving air quality.
Key words:  Air pollution  Backward trajectory  Cluster analysis  Transport pathways  Changzhou