摘要
基于454d PM 10、PM 2.5质量浓度小时数据,分析不同时间尺度下西安市和安康市PM 10、PM 2.5变化规律。结果表明:(1)西安市和安康市PM 10、PM 2.5日均浓度均呈宽“U”字型变化趋势,秋冬季污染重于夏秋季,西安市污染重于同期安康市。(2)经小波分析发现,西安市在2017年供暖期内PM 10、PM 2.5浓度小波周期与同期安康市基本相同,经济结构差异和自然条件差异对PM 10、PM 2.5时间周期无显著影响。(3)城市自然、经济和供暖条件引起西安市和安康市PM 10、PM 2.5小时浓度变化趋势差异。
Based on the hourly data of PM 10 and PM 2.5 mass concentrations in Xi'an and Ankang from December 2016 to February 2018,454 days in total,the temporal distribution characteristics of PM 10 and PM 2.5 in Xi'an and Ankang in Shaanxi province were compared and analyzed.The results showed that:(1)the average daily concentrations of PM 10 and PM 2.5 showed a wide"U"change trend during the 454d’s study period in Xi'an and Ankang.The pollution in autumn and winter was heavier than that in summer and autumn,and the pollution in Xi'an was heavier than that in Ankang.(2)During the heating period in 2017,the time scale analysis showed that the wavelet period of PM 10 and PM 2.5 concentration in Xi'an was basically the same as that of Ankang,the differences in economic structure and natural conditions had no significant impact on the time cycle of PM 10 and PM 2.5.(3)The change trend of PM 10 and PM 2.5 hourly concentration caused by the urban natural,economic and heating conditions in Xi'an and Ankang.
作者
郭婵
杨飞
王朋
豆瑞
易文利
GUO Chan;YANG Fei;WANG Peng;DOU Rui;YI Wen-li(College of Geography & Environment,Baoji University of Arts & Sciences,Baoji,Shaanxi 721013,China;Key Lab of Disaster Monitoring & Mechanism Simulating of Shaanxi Province,Baoji University of Arts & Sciences,Baoji,Shaanxi 721013,China)
出处
《四川环境》
2019年第5期74-82,共9页
Sichuan Environment
基金
宝鸡市科技计划项目(2018JH-15)
宝鸡文理学院一般项目(YJSCX18YB02)
