摘要
该研究基于聚类后向轨迹分析法和潜在源贡献因子法,针对2015-2016年厦门地区季轨迹聚类结果进行统计分析,春季、秋季和冬季以偏北和局地路径占比最高,夏季为偏南和局地路径占比高。当颗粒物污染等级达到良或以上时,偏西和局地路径的PM2.5浓度较高;除局地累积外,冬季表现出明显的由北向南的跨区域输送特征,春季受来自长三角以及湖南、江西、福建西南等地区的污染气团影响明显;细颗粒物污染主要出现在局地输送和偏北路径下,粗颗粒污染则是在西北长距离路径下出现。潜在源区分析结果表明,本地排放、长三角、华北一带是冬春季污染输送的主要源地,珠三角至闽南沿海一带是厦门地区秋季的主要源区。空气相对清洁的厦门地区颗粒物来源存在明显季节差异,受多来源多尺度颗粒物共同影响。
This paper is intended to analyze the impact of regional transport of PM （particulate matter） on Xiamen city. The characteristics of clustering trajectory in seasons of the years from 2015 to 2016 in Xiamen were statistically analyzed by using the clustering backward trajectory and the PSCF （potential source contribution function） method. Relatively analysis suggested that regarding PM transport the north and local were of great proportion in spring, autumn and winter, while in summer the south and local paths were the main. The high concentrations of PM2.5occurred via the transport paths of west and local as PM pollution level got worse than the level of ＇fine＇ or the ＇slight pollution＇ in terms of the national environmental standard, and apart from the local accumulation of PM the pollution in winter was featured by the transport path from north to Xiamen, while in spring the pollutant air mass was transported from Hunan, Jiangxi and Fujian provinces; fine particle pollutants mainly came from local source and via the north, and coarse particles were transported through long distance from northwest China. The analytic results by PSCF indicated that the areas of the YRD （Yangtze River Delta）, NCP （North China Plain） and the local region were the main PM sources that impact Xiamen in spring and winter, and transport from the Pearl River Delta （PRD） to Xiamen was the most important pollution path during autumn. In conclusion, the PM pollution of Xiamen city where the air is relatively clean was characterized with apparent seasonal difference being affected by the synthetic factors of multi-sourced and multi-scale.
作者
蒋永成
蒋宗孝
童怀忠
陈德花
李璇
李镔
邓发荣
张磊
赵丽娟
赵天良
JIANG Yongcheng; JIANG Zongxiao; TONG Huaizhong;CHEN Dehua; LI Xuan; LI Bin6, DENG Farong; ZHANG Lei; ZHAO Lijuan;ZHAO Tianliang(Laboratory of Strait Meteorology, Xiamen Meteorological Observatory, Xiamen Meteorological Bureau, Xiamen 361012, China;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Joint International Research Laboratory of Climate and Environment Change, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China; Zhangzhou Meteorological Bureau, Zhangzhou 363000, China; Longhai Meteorological Bureau, Longhai 363100, China; Chaoyang Meteorological Bureau, Chaoyang 122000, China; 6. Ninghua Meteorological Bureau, Ninghua 365400, China; 7. Xiamen Environmental Monitoring Central Station, Xiamen 361004, China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2018年第10期184-191,共8页
Environmental Science & Technology
基金
国家自然科学基金(41705045)
福建省自然科学基金(2016J01182)
漳州市自然科学基金项目(ZZ2018J03)
厦门市科技惠民项H(3502220164083)
