研究报告
徐元畅,张慧,高吉喜,Dillon S. Dodson,秦思达,钱建平,史强,李庆义.铁岭市2015—2018年大气颗粒物PM2.5潜在源区分析[J].环境科学学报,2020,40(8):2902-2910
铁岭市2015—2018年大气颗粒物PM2.5潜在源区分析
- Analysis of potential source of PM2.5 pollution in Tieling City from 2015 to 2018
- 基金项目：国家重点研发计划（No.2017YFC0506604）；部门事业费预算项目
- 作者
- 单位
- 徐元畅
- 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 地理科学学院, 南京 210044
- 张慧
- 1. 南京信息工程大学江苏省大气环境与装备技术协同创新中心, 地理科学学院, 南京 210044;2. 生态环境部南京环境科学研究所, 南京 210042
- 高吉喜
- 生态环境部环境卫星应用中心, 北京 100094
- Dillon S. Dodson
- 美国夏威夷大学大气科学系, 火奴鲁鲁 96822
- 秦思达
- 辽宁省环境科技服务中心, 沈阳 110161
- 钱建平
- 铁岭市生态环境局, 铁岭 112000
- 史强
- 铁岭市生态环境局, 铁岭 112000
- 李庆义
- 铁岭市生态环境局, 铁岭 112000
- 摘要：了解大气污染物的潜在源区分布对制定污染物减排措施至关重要.本文采用HYSPLIT模型，模拟出抵达铁岭市地区72 h的主要气流轨迹，结合铁岭市2015—2018年PM2.5逐小时浓度数据资料，采用CWT方法（concentration-weighted trajectory method）对铁岭市PM2.5潜在源区浓度进行了分析，在此基础上，提出了PCWT方法（percentage concentration-weighted trajectory method），对铁岭市地区PM2.5潜在源区浓度占比及传输过程进行了定量分析.研究表明，铁岭市PM2.5来源呈现出不同的季节特征：春季PM2.5主要来源于铁岭市西北和南部地区，夏季PM2.5主要来源于铁岭市南部地区，秋季PM2.5主要来源于铁岭市西北部及东北部地区，冬季PM2.5主要来源于铁岭市西北部及铁岭市周边地区.铁岭市PM2.5主要来源于3个方向，其中来自铁岭西北方向的源区贡献值4年平均占比27.36%、东北方向占18.51%、西南方向占15.73%；铁岭及周边城市、吉林省松嫩平原、科尔沁沙地以及辽宁中部城市群、环渤海湾地区是铁岭市PM2.5的主要国内源区；俄罗斯、蒙古、朝鲜是铁岭市PM2.5的主要国外源区，且近几年有增加趋势.研究成果对建立铁岭市生态环境管控分区，制定有效防治大气污染措施有重要的科学支撑作用.
- Abstract：Reducing pollution concentrations has become a priority around the world as governments continue to push towards clean energy and environmentally friendly policies. Understanding the pollution distribution of potential sources is critical to the formulation of pollutant reduction measures for the future. Here, HYSPLIT modeling is used to simulate the 72-hour backward trajectory of pollution that is advected into Tieling City. Concentration-weighted Trajectory (CWT) was used in combination with hourly PM2.5 data from 2015—2018. Based on CWT, a new method, the percentage concentration-weighted trajectory method (PCWT) is proposed to quantitatively analyze the concentration of pollution from potential source regions and the transmission process in relation to these source regions. Results indicate that the sources of PM2.5 in Tieling City display significant seasonal variability. The highest concentrations of PM2.5 are transported from the northwest and south of Tieling City in the spring, from the south in the summer, from the northwest and northeast in autumn, and from the northwest and surrounding area (suburbs) in the winter. Furthermore, PCWT analysis indicates that PM2.5 in Tieling city displays good agreement with the CWT results. PM2.5 from the northwest, northeast, and south of Tieling City accounted for 27%, 19% and 16% of the total PM2.5, respectively. Local and surrounding cities and areas (Songnen Plain, Horqin Sandy Land, Central Liaoning Urban Agglomeration, and Bohai Bay area) are the main domestic sources of PM2.5 in Tieling City, while Russia, Mongolia, and North Korea are the main foreign sources of PM2.5, with their ratios increasing rapidly in recent years.These results have important significance for the establishment of the Tieling ecological environmental control zone, and the effective prevention and control measured of air pollution.
摘要点击次数： 628 全文下载次数： 821
