2015年-2022年哈尔滨市大气颗粒物时空演变特征及传输路径研究  

Spatial and Temporal Variation Characteristics and Transport Pathway Analysis of Atmospheric Particulate Matter in Harbin City during 2015-2022

作　　者：王国梁 崔泽虎 李瑾 徐盛荣 杨悦 Wang Guoliang;Cui Zehu;Li Jin;Xu Shengrong;Yang Yue(Ecological Environmental Monitoring Center of Heilongjiang Province,Harbin 150056,China;Langfang EcologicalEnvironment Bureau,Langfang 065206,China;Zhongke Sanqing Technology Co.Ltd,Beijing 100029,China)

机构地区：[1]黑龙江省生态环境监测中心,黑龙江哈尔滨150056 [2]廊坊市生态环境局,河北廊坊065206 [3]中科三清科技有限公司,北京100029

出　　处：《环境科学与管理》2024年第12期39-43,共5页Environmental Science and Management

摘　　要：基于哈尔滨市2015年-2022年国控站点小时浓度PM_(2.5)和PM_(10)的数据探究了大气颗粒物的时空演变特征,并利用后向轨迹模型分析了颗粒物的传输路径。结果表明:2015年-2022年PM_(10)和PM_(2.5)年均浓度呈现下降趋势,年均下降速率分别为6.6μg·m^(-3)和4.8μg·m^(-3)。PM_(2.5)和PM_(10)的浓度呈现出明显的季节变化特征,冬季最高(85.7μg·m^(-3)和106.5μg·m^(-3)),夏季最低(18.3μg·m^(-3)和38.6μg·m^(-3))。同时,PM_(2.5)/PM_(10)值表现出秋冬季高,春夏季低的特点。来自于西南方向气团对应的PM_(2.5)和PM_(10)浓度最高,来自于西北方向和偏北方向气团对应的颗粒物浓度较低。不同轨迹中夏季颗粒物中粗颗粒物占比最高(56.3%~63.9%),冬季细颗粒物占比最高(80.4%~86.8%)。The spatial-temporal variation characteristics of atmospheric particulate matter concentrations were explored based the high temporal resolution monitoring data of PM_(2.5)and PM_(10)mass concentrations in Harbin city during 2015-2022.The transport path of particulate matter was analyzed using the backward trajectory model.The results suggested that the average annual concentrations of PM_(10)and PM_(2.5)showed an obvious downward trend from 2015 to 2022,with an average annual decline rate of 6.6μg·m^(-3)and 4.8μg·m^(-3).The obvious seasonal variations of M2.5 and PM_(10)concentrations were observed,with the highest values in winter(85.7μg·m^(-3)and 106.5μg·m^(-3)),and the lowest values in summer(18.3μg·m^(-3)and 38.6μg·m^(-3)).The backward trajectory clustering results indicated that the concentrations of PM_(2.5)and PM_(10)were highest under the influence of air masses from the southwest direction while more lower concentrations were observed when the air masses from northwest and northern direction.In different air masses trajectories,the PM_(2.5)-10/PM_(10)values were highest in summer(56.3%~63.9%),and the lowest values occurred in winter(80.4%~86.8%).

关 键 词：颗粒物 传输路径 时空分布 后向轨迹 PM_(2.5)/PM_(10) 

分 类 号：X511[环境科学与工程—环境工程]