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 ›› 2023, Vol. 39 ›› Issue (2): 44-52.doi: 10.3969/j.issn.1673-503X.2023.02.006

• 论文 • 上一篇    下一篇

2016—2019年长沙市O3浓度变化特征及其影响因子分析

花瑞阳1(),李蔚2,叶成志2,倪长健1,*()   

  1. 1. 成都信息工程大学大气科学学院 高原大气与环境四川省重点实验室, 四川成都 610225
    2. 湖南省气象台, 湖南长沙 410000
  • 收稿日期:2022-06-13 出版日期:2023-04-28 发布日期:2023-05-20
  • 通讯作者: 倪长健 E-mail:850412268@qq.com;ncj1970@163.com
  • 作者简介:花瑞阳, 女, 1997年生, 在读硕士研究生, 主要从事臭氧污染与气象环境方面的研究, E-mail: 850412268@qq.com

Variations of ozone concentration and its influence factors in Changsha from 2016 to 2019

Rui-yang HUA1(),Wei LI2,Cheng-zhi YE2,Chang-jian NI1,*()   

  1. 1. Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China
    2. Hu'nan Meteorological Observatory, Changsha 410000, China
  • Received:2022-06-13 Online:2023-04-28 Published:2023-05-20
  • Contact: Chang-jian NI E-mail:850412268@qq.com;ncj1970@163.com

摘要:

利用2016—2019年长沙市O3、NO2和CO逐时监测数据以及同期气象要素观测资料, 分析O3浓度的时空分布特征及气象因子对O3浓度的影响。结果表明: 2016—2019年长沙市O3日最大8 h滑动平均浓度各年平均值分别为(52.81±26.61)μg·m-3、(55.89±25.42)μg·m-3、(61.74±29.56)μg·m-3和(60.77±31.68)μg·m-3, 呈逐年升高趋势。夏季O3浓度最高(均值为74.56 μg·m-3), 冬季O3浓度最低(均值为33.64 μg·m-3)。O3浓度日变化呈显著的单峰特征, 峰值出现在16时左右, 超标时段为12—18时。2016—2019年长沙市O3浓度空间分布非均匀性表现为城区外围站点大于市中心站点, 其中冬季非均匀性最大(不均匀度为0.12), 夏季非均匀性最小(不均匀度为0.04)。长沙市城区O3浓度与温度、太阳辐射呈正相关(相关系数分别为0.61、0.65), 与相对湿度、NO2和CO呈负相关(相关系数分别为-0.42、-0.35、-0.27)。

关键词: O3浓度, 气象因子, 广义相加模型

Abstract:

Based on the hourly monitoring data of ozone, NO2, and CO in Changsha from 2016 to 2019 and the corresponding meteorological observation data, the temporal and spatial variations of ozone concentration and the meteorological influence factors were analyzed.The results show that the annual mean maximum 8-h moving average concentration of ozone in Changsha during 2016 and 2019 were (52.81±26.61) μg·m-3, (55.89±25.42) μg·m-3, (61.74±29.56) μg·m-3 and (60.77±31.68) μg·m-3, respectively, with an increasing trend.Ozone level is the highest in summer (mean 74.56 μg·m-3) and the lowest in winter (mean 33.64 μg·m-3).The diurnal variation in ozone presents a significant single-peak pattern with the peak level appearing at around 16:00 and the exceeding standard period between 12:00 and 18:00.The spatial heterogeneity in ozone shows that the levels appear larger at the urban periphery than at the urban center sites, with the largest heterogeneity in winter (0.12) and the smallest heterogeneity in summer (0.04).The concentrations of ozone in Changsha are positively correlated with temperature and solar radiation with the coefficients of 0.61 and 0.65, respectively, and negatively correlated with relative humidity, NO2, and CO with coefficients of -0.42, -0.35, and -0.27, respectively.

Key words: Ozone level, Meteorological factors, Generalized additive models

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