摘要
文章利用2015-2018年中国367个城市NO2浓度的实时数据,分析了中国城市NO2浓度的时空分布特征。分析结果显示:城市NO2小时均浓度日分布呈现双峰特征,早晚潮汐现象显著;城市NO2月均浓度呈"U"型分布,即12月污染物浓度最高,8月浓度最低;NO2污染表现出季节性分布特征,污染物浓度为冬季>秋季>春季>夏季,即冬季高发,夏季低发趋势;2015-2018这4年中,污染物年均浓度呈现先上升后下降趋势,其中2017年NO2污染程度尤为严重;全国不同地区污染情况差异显著,NO2污染最严重的省份为河北省,其中保定、唐山、石家庄、邢台不达标天数分列前4位;华北、华东地区NO2污染最为严重,西南、西北、华南地区污染状况程度较轻;三大城市群NO2污染情况表现为京津冀>长三角>珠三角。
Using real-time data of NO2concentration in 367 cities in China from 2015 to 2018,the temporal and spatial distribution characteristics of NO2concentration in Chinese cities is analysed.The hourly average NO2concentration in cities shows a bimodal characteristic,and the tidal phenomenon is significant in the morning and evening.The monthly average NO2concentration in cities is"U"type distribution,that is,the highest concentration of pollutants in December and the lowest in August;NO2pollution shows seasonal distribution characteristics,and the concentration of pollutants is winter>autumn>spring>summer,that is,high in winter and low in summer;In the four years from 2015 to 2018,the annual average concentration of pollutants increase first and then decrease,and the degree in 2017 is particularly serious.There are obvious differences in the pollution situation in different regions of the country.The province with the most serious NO2pollution is Hebei Province and the top four in Baoding,Tangshan,Shijiazhuang and Xingtai are substandard.The NO2pollution is serious in North China and East China,and less in Southwest,Northwest and South China.NO2pollution in the three major urban agglomerations is represented by Beijing-Tianjin-Hebei>Yangtze River Delta>Pearl River Delta.
作者
杨光飞
李思茵
李文丽
YANG Guangfei;LI Siyin;LI Wenli(Institute of Systems Engineering,Dalian University of technology,Dalian 116024,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第S02期200-206,共7页
Environmental Science & Technology
基金
国家自然基金项目(71671024,71601028,71421001)
教育部人文社科基金项目(15YJCZH198)
辽宁省社科规划基金项目(L17AGL012)
辽宁省“兴辽英才计划”项目(XLYC1807143)
辽宁经济社会发展课题(2019lslktqn-025)
大连市科技创新基金项目(2018J11CY009).
关键词
中国城市
大气污染
二氧化氮
NO2浓度
时空分布
Chinese cities
air pollution
nitrogen dioxide
NO2concentration
temporal and spatial distribution
作者简介
杨光飞(1981-),男,教授,博士,主要研究方向为数据驱动的可持续发展管理,(电子信箱)gfyang@dlut.edu.cn。
