洛阳市臭氧污染特征及其与气象因子的关系
    点此下载全文
引用本文:杨娜,王春迎,刘孟雄,等..洛阳市臭氧污染特征及其与气象因子的关系[J].气象与环境科学,2019,42(4):90-95.Yang Na,Wang Chunying,Liu Mengxiong,et al..Characteristics of Ozone Pollution in Luoyang and Its Correlation with Meteorological Elements[J].Meteorological and Environmental Sciences,2019,42(4):90-95.
摘要点击次数: 102
全文下载次数: 69
作者单位
杨娜,王春迎,刘孟雄,等.  
DOI:doi:10.16765/j.cnki.1673-7148.2019.04.013
基金项目:
中文摘要:为了了解洛阳市O3污染特征及其影响因素,利用2017年洛阳市7个国控点监测到的O3、NO2浓度及气象要素逐时数据,统计分析了2017年洛阳市O3及NO2的时间分布特征及NO2浓度、气象因子对O3浓度的影响。结果表明,洛阳市2017年O3日最大8 h第90百分位数浓度为200 μg/m3,是二级标准的1.25倍。O3和NO2浓度存在明显的季节性变化特征,O3浓度夏季最高,冬季的最低;NO2浓度冬季最高,夏季的则最低。O3浓度的日变化呈现为单峰分布,午后浓度较高,峰值出现在15:00左右;NO2受机动车早晚高峰影响,表现为双峰分布,峰值分别出现在08:00和21:00。O3与NO2浓度呈现出良好的负指数函数关系,当洛阳市NO2浓度低于40 μg/m3时,存在着O3浓度超标的风险。高温低湿条件下有利于O3的生成,当温度超过27 ℃时,洛阳市O3小时浓度开始出现超标现象,且温度越高,超标风险越大;当相对湿度低于40%时,O3小时平均浓度超标率最高为63.30%,随着相对湿度的增加,超标率逐渐降低,当相对湿度大于70%时,未出现O3小时浓度超标现象。
中文关键词:洛阳  O3  NO2  气象因子
 
Characteristics of Ozone Pollution in Luoyang and Its Correlation with Meteorological Elements
Abstract:To investigate the characteristics and impact factors of O3 in Luoyang City, the temporal distribution characteristics of O3 and NO2 and the impact of NO2 concentration and meteorological factors on O3 concentration in Luoyang in 2017 are statistically analyzed by using the hourly data of O3, NO2 concentration and meteorological elements observed in 2017 at seven national environmental monitoring stations in Luoyang. The results show that the 90th percentile concentration of the daily maximum 8 h O3 in Luoyang was 200 μg/m3 in 2017, which is 1.25 times the Level 2 standard. The concentrations of O3 and NO2 have obvious seasonal variation characteristics: O3 is the highest in summer and the lowest in winter while the change of NO2 is in an opposite situation. The diurnal variation of O3 concentration presents a unimodal distribution, that is, the O3 concentration is relatively high in the afternoon with the peak value appearing at about 15:00. The daily variation of NO2 concentration, affected by rush hours in the morning and evening, presents a bimodal distribution, with peaks seen at 08:00 and 21:00, respectively. The concentration of O3 is exponentially suppressed with the increase of NO2 concentration. When the NO2 concentration in Luoyang is lower than 40 μg/m3, there is a risk that the O3 concentration exceeds the limit. High temperature and low humidity are in favor of the formation of O3. When the temperature is higher than 27 ℃, the hourly concentration of O3 begins to rise. The higher the temperature, the greater the risk of exceeding the limit. When the relative humidity is lower than 40%, the exceeding rate of O3 hourly average concentration is 63.30% at most, and with the increase of relative humidity, the frequency of exceeding rate decreases gradually. When the relative humidity is above 70%, the exceeding rate of O3 hourly concentration is 0.
Keywords:
查看全文  查看/发表评论  下载PDF阅读器
主管单位:河南省气象局      单位地址:郑州市金水路110号
电话:0371-65922877      传真:0371-65922877      邮编:450003      E-mail:zzhnqx@126.com
版权所有:《气象与环境科学》编辑部      技术支持:北京勤云科技发展有限公司