摘要
利用美国国家环境预报中心(NCEP)的全球资料同化系统(GDAS)气象场数据,结合后向轨迹模式的聚类分析法、潜在源贡献因子法(PSCF)和浓度权重轨迹法(CWT),分析2015-2018年冬防期(1、2、11、12月)漯河市的PM_(2.5)输送特征及其潜在源。结果表明:(1)冬防期间漯河市PM_(2.5)主要来自东北方向和偏南方向,以东北方向为主,且短距离的外部污染物输入影响严重。(2)影响漯河市空气质量的潜在源区主要分布在河北、山东、湖北、湖南、安徽、江西省,以及河南省内安阳、鹤壁、濮阳、新乡、开封、周口、南阳7个省辖市,河北、山东、河南省东北部地区是高浓度PM_(2.5)外来输送的主要潜在源区。(3)根据“平衡风速”,提出“停滞时间”和“延迟时间”的概念,用以定量评估区域污染传输对漯河市空气质量的影响。由区域污染传输导致的污染在漯河市的停滞时间为2~10 h,增加的PM_(2.5)浓度为8~268μg/m^(3)。
The PM_(2.5) transport characteristics and potential sources in Luohe,Henan province,during the winter prevention period(January,February,November,and December)from 2015 to 2018,were analyzed,using the Global Data Assimilation System(GDAS)meteorological field data from the National Centers for Environmental Prediction(NCEP),along with the cluster analysis method of the backward trajectory model,the Potential Source Contribution Factor(PSCF)method,and the Concentration Weight Trajectory(CWT)method.The findings indicate that(1)PM_(2.5) in Luohe during the winter defense period is primarily brought in from the northeast and south,with the northeast trend predominating,and that short-range external pollution input has a significant impact.(2)Hebei,Shandong,Hubei,Hunan,Anhui,and Jiangxi provinces,as well as seven prefecture-level cities in Henan province,including Anyang,Hebi,Puyang,Xinxiang,Kaifeng,Zhoukou,and Nanyang are the main potential source areas of high concentrations of PM_(2.5).Hebei,Shandong,and northeastern Henan provinces are the most important potential source areas.(3)The concepts of“stagnation time”and“delay time”are presented to quantitatively measure the influence of regional pollution transmission on the air quality of Luohe based on the“equilibrium wind speed.”Due to the transmission of regional pollutants,the pollution in Luohe stagnates for 2 to 10 hours while the concentration of PM_(2.5) rises 8 to 268μg/m^(3).
作者
贾琼莉
孔海江
田力
王丽华
卢予琢
Jia Qiongli;Kong Haijiang;Tian Li;Wang Lihua;Lu Yuzhuo(College of Ecology and Environment of Zhengzhou University,Zhengzhou 450001,China;CMA•Henan Key Laboratory of Agrometeorological Support and Applied Technique,Zhengzhou 450003,China;Anyang National Climate Observatory,Anyang 455000,China;Zhumadian Municipal Bureau of Ecological Environment Solid Waste and Radiation Safety Technology Center,Zhumadian 463000,China;Henan Provincial Meteorological Observatory,Zhengzhou 450003,China;Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security,Henan University,Kaifeng 475004,China;College of Chemistry of Zhengzhou University,Zhengzhou 450001,China)
出处
《气象与环境科学》
2023年第5期18-24,共7页
Meteorological and Environmental Sciences
基金
安阳国家气候观象台开放研究基金(AYNCOF202301)
国家重点研发计划(2017YFC02112402)
国家留学基金(201705330004)
中央引导地方科技发展项目(HN2016-149)
中国气象局预报员专项(CMAYBY2017-043、CMAYBY2020-075)
河南省气象局重点项目(KZ201704)
河南科技智库调研课题(HNKJZK-2020-32C)。
