主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2022, Vol. 38 ›› Issue (3): 75-84.doi: 10.3969/j.issn.1673-503X.2022.03.009

• 论文 • 上一篇    下一篇

2013—2018年大连中心城区臭氧时空变化及其影响因子分析

马瑞丰1,2(),许敬红2,严良政2   

  1. 1. 辽宁师范大学地理科学学院, 辽宁 大连 116029
    2. 大连市生态环境事务服务中心, 辽宁 大连 116023
  • 收稿日期:2020-11-05 出版日期:2022-06-28 发布日期:2022-07-23
  • 作者简介:马瑞丰, 女, 1988年生, 副教授, 主要从事自然地理及气候变化研究, E-mail: maruifeng14@hotmail.com
  • 基金资助:
    大连市生态环境局2019年部门预算资金“臭氧应对策略研究”项目

Spatio-temporal changes and influencing factors of ozone in the central area of Dalian during 2013-2018

Rui-feng MA1,2(),Jing-hong XV2,Liang-zheng YAN2   

  1. 1. School of Geography, Liaoning Normal University, Dalian 116029, China
    2. Eco-environmental Affairs Service Center of Dalian City, Dalian 116023, China
  • Received:2020-11-05 Online:2022-06-28 Published:2022-07-23

摘要:

基于2013—2018年大连中心城区O3监测数据和气象数据, 分析了该区O3污染时空变化特征及气象要素对O3污染的影响。结果表明: 2013—2018年大连中心城区O3已经逐渐成为最主要的大气污染物之一。O3年平均浓度由2013年的66.66 μg·m-3上升至2018年的101.62 μg·m-3。秋季和夏季是大连O3浓度较高的季节, 其次是冬季和春季。O3最高浓度月份主要为5月、6月及9月。O3浓度日变化呈明显的单峰状, 从上午08时开始增加, 在下午14—16时达到最高, 白天浓度高于夜晚。O3污染物在2013—2017年从大连中心城区的西南向东北扩散。大连中心城区O3与其他5种大气污染物均存在不同程度的负相关, 与气温呈显著正相关, 与相对湿度、气压及风速相关性较差。有利于大连O3污染天气的气象条件主要为高气温(>30℃)、低湿度(≤80%)、低风速(1.5—2.0 m·s-1)、北风风向和长日照时间。高污染日的出现可能是受高温天气与本地逐渐增加的排放物共同影响。

关键词: O3, 气温, 相对湿度, 风速

Abstract:

Based on the O3 monitoring data and meteorological data in the central area of Dalian from 2013 to 2018, the temporal and spatial characteristics of O3 pollution in this area and its responses to the meteorological influencing factors were analyzed.The results indicated that O3 has gradually become one of the most important air pollutants in the central city of Dalian during the past 6 years, and its annual average concentration rises from 66.66 μg·m-3 in 2013 to 101.62 μg·m-3 in 2018.In terms of temporal changes, the concentration of O3 is higher in autumn and summer than in winter and spring and is highest in May, June, and September.In addition, the O3 concentration begins to rise at 08:00.and maintains a peak during 14:00-16:00, showing an obvious single peak shape on a daily time scale and is higher in the daytime than in nighttime.In terms of spatial distribution, O3 pollutants spread from the southwest to the northeast from 2013 to 2017.Moreover, O3 in the study area has a negative correlation with the other 5 air pollutants to different degrees and is significantly and positively correlated with temperature and slightly correlated with relative humidity, air pressure, and wind speed.The optimal meteorological conditions for O3 pollution are mainly air temperature above 30 ℃, relative humidity below 80 %, wind speed between 1.5 to 2.0 m·s-1, north wind direction, and long sunshine duration.High pollution days are probably induced by high temperatures and increasing local emissions.

Key words: Ozone, Temperature, Relative humidity, Wind speed

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