环境保护科学2018，Vol.44Issue(2)：78-84,97,8.DOI:10.16803/j.cnki.issn.1004-6216.2018.02.016
兰州市区臭氧时空分布特征及气象和环境因子对臭氧的影响
Temporal and Spatial Distribution of Ozone and Effects of Meteorological and Environmental Factors on Ozone in the Urban Areas of Lanzhou City
摘要
Abstract
In this paper, on the basis of the real-time monitoring data of O3, NO2and CO concentrations at 4 automatic air monitoring points in the urban areas of Lanzhou City and the meteorological data such as daily average temperature, relative humidity, atmospheric pressure and wind speed from 2014 to 2016, the spatial-temporal distribution characteristics of O3and the impacts of the environmental factors (NO2and CO) and meteorological factors on O3concentration in the past three years were statistically analyzed. The results showed that the annual variation of O3concentration appeared U-shaped distribution in the urban areas of Lanzhou City. O3concentration was the highest in summer with the peak of (65.6 ± 16.9) μg/m3in May. The annual average concentration at the biological products institute among the four monitoring points was the highest. The daily variation of O3appeared a single-peak distribution. That was, O3concentration turned higher in the afternoon. The peak time at Lanlian Hotel was about 2 hours ahead of the other monitoring points. Contrary to O3, annual variation characteristics of NO2 and CO concentrations showed an inverted U -shaped structure with both the peaks of (2.53 ± 0.80) mg/m3and (78.9 ± 28.2) μg/m3respectively in December. NO2and CO concentrations in the day time were much higher than those at night. O3 concentration was exponentially suppressed with the increase of NO2and CO concentrations. High temperature and low humidity were favorable for the formation of O3from its precursors (NO2and CO). The meteorological and environmental conditions for highly- concentrated O3occurrence in the urban areas of Lanzhou were the daily average temperature over 20°C, relative humidity about 40% ~50%, wind speed no more than 5 m/s, NO2concentration below 20 μg/m3, and CO concentration lower than 0.5 mg/m3respectively.关键词
臭氧/时空分布/气象因子/环境因子/兰州市区Key words
Ozone/Temporal and Spatial Distribution/Meteorological Factor/Environmental Factor/Urban Areas of Lanzhou City分类
资源环境引用本文复制引用
李全喜,王金艳,刘筱冉,董继元,魏林波..兰州市区臭氧时空分布特征及气象和环境因子对臭氧的影响[J].环境保护科学,2018,44(2):78-84,97,8.基金项目
国家自然科学基金项目(41505083,41575183) （41505083,41575183）
干旱气象科学研究基金项目(IAMZ01503) （IAMZ01503）
甘肃省自然科学基金(1506RJZAZ08) （1506RJZAZ08）
兰州大学中央高校基本科研业务专项资金(lzujbky-2017-61和lzujbky-2017-68)资助 （lzujbky-2017-61和lzujbky-2017-68）
