南襄盆地春节期间一次典型的重污染过程分析--以襄阳市为例  

Analysis of a typical heavy pollution process during the Spring Festival in Nanxiang Basin:taking Xiangyang as an example

作　　者：杨如春 王振楠 曹世凯 孙天宝 蔡舰 Yang Ruchun;Wang Zhennan;Cao Shikai;Sun Tianbao;Cai Jian(China Sciences MapUniverse Technology Co.,Ltd.,Beijing 100101,China;Xiangyang Air Pollution Control and Management Center,Xiangyang 441011,China;Xiangyang Polytechnic,Xiangyang 441050)

机构地区：[1]中科宇图科技股份有限公司,北京100101 [2]襄阳市大气污染防治管理中心,湖北襄阳441011 [3]襄阳职业技术学院,湖北襄阳441050

出　　处：《环保科技》2024年第2期20-27,共8页Environmental Protection and Technology

基　　金：中国工程院咨询项目"互联网+行动计划战略研究(2035)"(2018-ZD-02)。

摘　　要：基于襄阳市2023年1月环境监测数据,结合气溶胶激光雷达、后向轨迹模式(HYSPLIT)等技术手段,对襄阳市春节期间一次重污染过程的污染因子变化情况、气象因素以及传输来源等进行了研究分析。结果表明:本次污染过程变化特征由偏沙尘型-偏烟花型-偏二次型-偏沙尘型转变。弱高压前部、高空粗颗粒物输送是第一阶段PM_(10)升高的主要原因,污染气团主要来源于新疆、甘肃、内蒙古区域,途经宁夏、陕西、河南等地。第二阶段主要由不利气象、区域环境、污染传输及烟花爆竹燃放等综合影响,造成PM_(2.5)重污染过程,主要受湖北局地气团影响。第三阶段污染由霾转变为浮尘影响再逐渐消散,前期冷空气携带上游污染物影响襄阳,后随高压南下,天气现象逐渐转为受浮尘影响,随浮尘过境及粗颗粒物沉降,空气质量好转,污染气团主要来自新疆、甘肃、内蒙古区域,途经宁夏、陕西等地到达襄阳市区。Based on the environmental monitoring data of Xiangyang in January 2023,combined with aerosol Lidar,backward trajectory model(HYSPLIT)and other technical means,the pollution factors,meteorological factors and transmission sources of a heavy pollution process during the Spring Festival in Xiangyang were studied and analyzed.The results show that the pollution source changed in the way of the sand-dust type-fireworks type-secondary pollutants type-sand-dust type.The transport of coarse particles in front of weak high pressure and high altitude was the main reason for the increase of PM_(10) in the first stage.The polluted air mass mainly came from Xinjiang,Gansu and Inner Mongolia,and passed through Ningxia,Shaanxi and Henan.The second stage is mainly affected by unfavourable weather,regional environment,pollution transmission and fireworks discharge,resulting in heavy pollution of PM_(2.5),which mainly came from the local air mass in Hubei.In the third stage,the pollution source changes from haze to dust and then gradually dissipates.In the early stage,the cold air carries upstream pollutants to affect Xiangyang,and later,with the high pressure moving southward,the weather phenomenon gradually turns to be affected by floating dust.With the transit of floating dust and the settlement of coarse particles,the air quality improves.

关 键 词：襄阳市 重污染 污染传输 沙尘 霾 气象因子 

分 类 号：X831[环境科学与工程—环境工程]