摘要
利用2015—2017年内蒙古乌兰察布市集宁区空气质量数据和常规气象观测资料,对集宁地区O3污染现状、时间变化特征及其影响因子进行统计分析。结果表明:集宁地区O3污染日数逐年增加,已经成为该地首要污染物。O3质量浓度变化具有明显的季节性,污染易发于春末和夏季;O3质量浓度日变化呈单峰型,午后达到峰值,傍晚前后开始衰减,一直持续至第二日清晨。O3质量浓度的变化与气象要素关系密切,较高的气温易提升光化学反应速率;低云量的多少也影响O3质量浓度增长率和下降率;偏南风和适中的风速利于O3前体物及O3的输送和累积。集宁地区的NO2和CO是重要的O3前体物,NO2对O3质量浓度变化的影响更直接和显著,CO作为初始“燃料”为O3的生成提供基础条件。
Based on the air quality data and routine meteorological observation data from 2015 to 2017 in Jining District of Ulanqab,the present situation,temporal variation characteristics and influencing factors of O 3 pollution in Jining district were analyzed statistically.The results show that the number of O 3 pollution days in Jining increased year by year in the past three years and O 3 had become the primary pollutant causing pollution.The variation of O 3 concentration was obviously seasonal,and pollution was easy to occur in late spring and summer.The daily change of O 3 concentration was very obvious,showing a mono-peak distribution.It reached its peak in the afternoon and began to decay around the evening until the morning of the second day.The variation of O 3 concentration was closely related to meteorological factors.Higher temperatures tended to increase the photochemical reaction rate.The amount of low cloud cover also affected the change of O 3 concentration growth rate and decline rate.The southerly wind and moderate wind speed were beneficial to the transportation and accumulation of O 3 precursors and O 3.The NO 2 and CO in Jining were important O 3 precursors,and the effects of NO 2 on the change of O 3 concentration were direct and significant,and CO as the initial“fuel”provided the basic conditions for the generation of O 3.
作者
杨志捷
刘烨焜
韩理
YANG Zhijie;LIU Yekun;HAN Li(Inner Mongolia Meteorological Bureau,Hohhot 010051,China;Ulanqab Meteorological Bureau of Inner Mongolia Autonomous Region,Ulanqab 012000,Inner Mongolia,China;Inner Mongolia Meteorological Observatory,Hohhot 010051,China)
出处
《干旱气象》
2019年第4期631-638,共8页
Journal of Arid Meteorology
基金
内蒙古自治区专业气象技术服务创新团队空气污染气象影响研究项目资助
关键词
臭氧污染
气象因子
前体物
ozone pollution
meteorological factor
precursor
