摘要
近年来我国灰霾天气频发,环境空气质量引起了人们的广泛关注.本研究在湖北省5个代表城市2018年3月至2019年2月空气质量基础上,采用线性拟合分析法对该地区空气质量时空变化规律和温度对首要污染物PM的影响进行研究.年度结果表明,五市空气质量最差时段均出现在1月,且7月空气质量最优,其原因是冬季北方城市供暖,以及民众燃放烟花爆竹导致空气质量下降.五市空气质量空间分布结果表明,全年空气质量以咸宁市最优,襄阳市最差.冬季湖北省东部(武汉、黄冈和咸宁市)空气质量明显优于西部(襄阳和宜昌市);进一步对湖北省东部的武汉和西部的襄阳的首要污染物加以比较发现,两城市首要污染物均为PM_(2.5)和O_(3),其中武汉市NO日均值达标率低于襄阳市,其来源一部分是当地工业生产和汽车尾气排放,另一部分则是由于气候风向和地形因素导致北方城市的空气污染物扩散而来.
In recent years, the frequent haze weather in my country has caused widespread concern about the ambient air quality. Therefore, based on the air quality of five representative cities in Hubei Province from March 2018 to February 2019, the temporal and spatial variation of air quality in the region and the influence of temperature on the primary pollutant PMwere analyzed by linear fitting method. The worst period of air quality in the five cities occurred in January, and the best air quality in July was shown by the annual results. Heating in northern cities in winter led to a decline in air quality, as well as people setting off fireworks and firecrackers. The results of the spatial distribution of air quality in the five cities showed that Xianning City had the best air quality, and Xiangyang City had the worst air quality throughout the year. In winter, the air quality in the eastern part of Hubei Province(Wuhan, Huanggang and Xianning City) was significantly better than that in the western part(Xiangyang and Yichang City).It was found that the main pollutants in the two cities were PM_(2.5)and O_(3). By further comparing of the main pollutants in Wuhan City in the east of Hubei Province and Xiangyang City in the west of Hubei Province, it was found that the daily average NOcompliance rate of Wuhan City was lower than that of Xiangyang City, one part of the source was local industrial production and automobile exhaust emissions, and the other part was the spread of air pollutants in northern cities due to climate, wind direction and topographical factors.
作者
张天翼
董羽吉
罗艾虎
宋文瑄
宋慧婷
李玉华
ZHANG Tianyi;DONG Yuji;LUO Aihu;SONG Wenxuan;SONG Huiting;LI Yuhua(Faculty of Resources and Environmental Science,Hubei University,Wuhan 430062,China)
出处
《湖北大学学报（自然科学版）》
CAS
2023年第1期53-62,共10页
Journal of Hubei University：Natural Science
基金
国家重点研发计划(2020YFA0908400、2019YFA090500)
湖北省重点研发计划(2020BBA056)
中央引导地方科技发展专项(2018ZYYD034)
武汉市科技局应用基础前沿专项(2019020701011496)
国家级大学生创新创业训练计划项目(201910512029)资助。
关键词
空气质量
优良天数
首要污染物
时空分布
PM2.5
air quality
good days
primary pollutant
temporal and spatial distribution
PM2.5
