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山东省2015年PM2.5和O3污染时空分布特征
Spatial-Temporal Distribution Characteristics of PM2.5and O3 over Shandong Province in 2015
投稿时间:2017-12-23  修订日期:2018-08-22
DOI:10.19316/j.issn.1002-6002.2019.02.08
中文关键词:  PM2.5  O3  山东省  时空分布特征  气象要素
英文关键词:PM2.5  O3  Shandong province  spatial-temporal distribution characteristics  meteorological factors
基金项目:国家自然科学基金资助项目(41575128,21477021,41641044)
作者单位
隋玟萱 云南大学, 大气科学系, 云南 昆明 650500 
王颢樾* 云南大学, 大气科学系, 云南 昆明 650500
复旦大学环境科学与工程系, 上海市大气颗粒物污染防治重点实验室(LAP3), 上海 200000 
唐晓 中国科学院大气物理研究所, 大气边界层物理和大气化学国家重点实验室(LAPC), 北京 100089 
卢苗苗 中国科学院大气物理研究所, 大气边界层物理和大气化学国家重点实验室(LAPC), 北京 100089 
吴煌坚 中国科学院大气物理研究所, 大气边界层物理和大气化学国家重点实验室(LAPC), 北京 100089 
朱莉莉 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012 
通讯作者:王颢樾*  云南大学, 大气科学系, 云南 昆明 650500;复旦大学环境科学与工程系, 上海市大气颗粒物污染防治重点实验室(LAP3), 上海 200000  
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中文摘要:
      利用中国环境监测总站的城市空气质量自动监测数据,分析了2015年山东省细颗粒物(PM2.5)和臭氧(O3)污染的时空分布特征,并初步探讨了其与气象要素的相互关系。研究发现:山东省PM2.5年均质量浓度和年超标天数的空间分布均呈现由东部向西部递增的趋势,半岛地区的浓度最低,其他地区浓度均较高,年均质量浓度最大值出现在德州(101 μg/m3)。各城市PM2.5的月均质量浓度均呈现出季节性变化,冬季最高,夏季最低。O3-8h年均值和O3年超标天数的空间分布与PM2.5不同,半岛地区污染天数最少,其次为南部地区,中部地区和西北部地区污染最为严重并且各区域的城市之间O3污染情况存在较大差异,具有明显的局地性特征。O3质量浓度在春末夏初最高,超标现象主要出现在5—8月。分析各城市PM2.5污染和O3污染的协同性与差异性发现,虽然不同城市之间两者污染情况存在一定差异,但整体上看,山东省大气复合污染特征明显,全年有10个城市的PM2.5和O3同时超标天数都在20 d以上,并且该现象主要发生在夏季。夏季高温低湿的大陆气团控制更有利于O3和PM2.5叠加共存形成复合型污染。温度≥26℃时,O3-8 h与PM2.5日均质量浓度的相关系数为0.63,相对湿度≤60%时,两者相关系数为0.69。此外,当在大陆气团的控制下发生O3污染时,相对湿度的提高更有利于PM2.5浓度的增加。
英文摘要:
      The data from China National Environmental Monitoring Centre were used to investigate the spatial-temporal distribution characteristics of PM2.5 and O3 in Shandong province in 2015 and to make a preliminary discussion on the relationship between them and meteorological factors. The spatial distribution of annual average concentration of PM2.5 and the number of days that PM2.5 exceeding the standard both showed the trend of increasing from east to west. The annual average concentrations were lowest in the peninsula area and higher in other areas. The maximum value was 101 μg/m3 in Dezhou. For all cities,the PM2.5 concentrations showed seasonal variations with the highest and lowest values occurring in winter and summer respectively. The spatial distribution of O3-8h and the number of days that O3 exceeding the standard were different from PM2.5. The peninsula area had the fewest days of O3 pollution,followed by the south area. The central area and the northwest area had the most serious O3 pollution and there were great differences in O3 pollution between cities in different areas,which had obvious local characteristics. The concentration of O3 was the highest in late spring and early summer,and the O3 pollution mainly occurred from May to August. The analysis of the cooperativity and the difference between PM2.5 and O3 pollution suggested that the characteristics of complex air pollution in Shandong province were obvious. There were 10 cities that the number of days PM2.5 and O3 both exceeding the standard were more than 20 days. And this phenomenon mainly happened in summer. In summer,when controlled by the high temperature and low humidity continental air mass,it was more conducive to the coexistence of O3 and PM2.5 to form complex pollution. When the temperature was over 26℃,the correlation coefficient between O3-8h and the daily average concentration of PM2.5 was 0.63. When the relative humidity was less than 60%,the correlation coefficient between them was 0.69. In addition,when O3 pollution occurred under the control of continental air mass,the increase of relative humidity was more conducive to the increase of PM2.5 concentration.
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