京津冀气溶胶时空变化特征及潜在来源分析  

Analysis on Characteristics and Potential Sources of Aerosols in Beijing-Tianjin-Hebei Region

作　　者：高琦 郭新成[1] 孟妮娜[1] 王利[1] 丁慧兰 GAO Qi;GUO Xin-cheng;MENG Ni-na;WANG Li;DING Hui-lan(School of Geological Engineering and Surveying and Mapping, Chang’an University, Xi'an 710054, China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054

出　　处：《科学技术与工程》2021年第30期13185-13195,共11页Science Technology and Engineering

基　　金：陕西省自然科学基础研究计划(2021JM-155)。

摘　　要：针对京津冀日益恶化的环境问题,采用Terra-MODIS C6.1 MOD04_L2气溶胶光学厚度(aerosol optical depth,AOD)产品对京津冀地区2011—2020年AOD时空变化特征进行探究,基于HYSPLIT模型得到京津冀地区3个主要城市的四季主要气流输送轨迹,并结合空气质量指数(air quality index,AQI)数据和潜在源贡献因子法(potential source contribution function,PSCF)分析石家庄市不同季节的污染物潜在源区。结果表明:京津冀地区多年AOD空间分布大体呈东南高西北低的特征;10 a间AOD总体呈W型下降,峰值和谷值出现在2011年(0.49)和2017年(0.33);AOD月均值变化呈双峰型,峰值出现在2月(0.48)和7月(0.59);AOD四季均值由高至低依次为:夏(0.53)>春(0.39)>冬(0.36)>秋(0.32);北京市、天津市和石家庄市四季主要受到短距离气团输送的影响;统计AQI优良率可知京津冀3个主要城市中石家庄市空气质量最差,通过PSCF分析得出影响石家庄市AQI值的潜在源区主要分布在石家庄市本地及周边省市。In response to the deteriorating environmental problems in Beijing-Tianjin-Hebei region,Terra-MODIS C6.1 MOD04_L2 aerosol optical thickness(aerosol optical depth,AOD)product was used to explore the characteristics of the AOD spatiotemporal changes in Beijing-Tianjin-Hebei region from 2011 to 2020,the HYSPLIT model was used to analyze the main air transport tracks of three major cities in Beijing-Tianjin-Hebei region in four seasons,and combined with the air quality index(air quality index,AQI)data and the potential source contribution factor method(potential source contribution function,PSCF),the potential source areas of pollutants in Shijiazhuang city in different seasons were analyzed.The results show that:The spatial distribution of AOD in Beijing-Tianjin-Hebei region for many years is generally high in the southeast and low in the northwest.The AOD in 10 years has a W-shaped decline,with peaks and valleys appearing in 2011(0.49)and 2017(0.33).Monthly AOD changes are double peaks,with peaks appearing in February(0.48)and July Month(0.59).The average value of AOD in the four seasons from high to low is:summer(0.53)>spring(0.39)>winter(0.36)>autumn(0.32).The four seasons of Beijing,Tianjin and Shijiazhuang are mainly affected by short-distance air mass transportation.According to statistics of the excellent and good rate of AQI,Shijiazhuang has the worst air quality among the three major cities in Beijing-Tianjin-Hebei,and the PSCF analysis shows that the potential source areas that affect the AQI value of Shijiazhuang are mainly located in Shijiazhuang and surrounding provinces and cities.

关 键 词：气溶胶光学厚度 时空变化特征 聚类分析 潜在源贡献因子法 京津冀地区 

分 类 号：X513[环境科学与工程—环境工程]