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杭州城区大气颗粒物污染特征及PM2.5潜在源区研究
The Characteristics Of Atmospheric Particles And Potential Sources of PM2.5 In Urban Hangzhou
投稿时间:2019-10-22  修订日期:2019-11-20
DOI:10.19316/j.issn.1002-6002.2020.05.12
中文关键词:  大气颗粒物  污染特征  潜在源贡献因子  浓度权重轨迹  杭州
英文关键词:atmospheric particulates  temporal characteristics  potential source contribution function(PSCF)  concentration-weighted trajectory(CWT)  Hangzhou
基金项目:国家重点研发计划项目(2018YFC0213806);浙江省环保科研项目(2017A013)
作者单位
蒋琦清 浙江省生态环境科学设计研究院, 浙江 杭州 310007 
陈文聪 浙江大学教育学院附属学校, 浙江 杭州 310051 
徐冰烨 浙江省环境监测中心, 浙江 杭州 310012 
王琼真* 浙江省生态环境科学设计研究院, 浙江 杭州 310007 
吴建 浙江省生态环境科学设计研究院, 浙江 杭州 310007 
通讯作者:王琼真*  浙江省生态环境科学设计研究院, 浙江 杭州 310007  
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中文摘要:
      基于2015年9月1日至2016年8月25日杭州城区观测点PM1、PM2.5、PM10小时浓度数据进行分析,利用HYSPLIT模型、潜在源贡献因子(PSCF)方法和浓度权重轨迹(CWT)方法,探讨了杭州城区PM1、PM2.5、PM10时间分布特征和PM2.5潜在来源。结果表明:研究期间PM1季节平均浓度表现为冬季 > 秋季、春季 > 夏季,PM1~2.5、PM2.5~10浓度则表现为冬季 > 春季 > 秋季 > 夏季;PM1浓度日变化呈现明显的双峰现象,而PM1~2.5和PM2.5~10在同一时段均无明显浓度峰值;杭州城区PM2.5受外源输送污染具有明显的季节性变化特征,夏季、秋季杭州城区PM2.5的潜在源区主要是浙江北部、安徽东南部等,春季PM2.5的潜在源区主要是浙江中部、江苏南部等,冬季PM2.5的潜在源区主要是山东南部、江苏西南部、浙江北部、安徽南部、江西中部等地区。
英文摘要:
      In this study,air mass concentration data from September 1,2015 to August 25,2016 were used to analyze temporal characteristics of PM1,PM2.5 and PM10 in Hangzhou.The HYSPLIT model was used to analyze the 48-hour backward trajectories.And the potential source contribution function and concentration-weighted trajectory analysis were applied to evaluate the transport pathways and sources of PM2.5 in Hangzhou.The results showed the order of the seasonal mean concentrations of PM1 was winter > autumn,spring > summer.The order of the seasonal mean concentrations of PM1-2.5 and PM2.5-10 was winter > spring > autumn > summer.The significant diurnal variation of PM1 displayed a bimodal pattern,while PM1-2.5 and PM2.5-10 have no obvious concentration peaks at the same time.The main potential sources of PM2.5 in Hangzhou during and autumn summer are located in northern Zhejiang and southeastern Anhui.The main potental sources of PM2.5 during spring are Located in the central Zhejiang and southern Jiangsu.The main potential sources of PM2.5 during winter are located in the south of Shandong,southwestern Jiangsu,northern Zhejiang,southern Anhui,and central Jiangxi.
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