特别选题
黎煜满,李磊,谢洁岚,赵伟,张阿思,郑昱,汪海恒,范绍佳.基于KZ滤波法的韶关市O3不同时间尺度变化特征分析研究[J].环境科学学报,2023,43(1):128-139
基于KZ滤波法的韶关市O3不同时间尺度变化特征分析研究
- Study on variation characteristics of O3 at different time scales in Shaoguan city based on KZ filter method
- 基金项目:广东省基础与应用基础研究重大项目(No.2020B0301030004);广东省科技计划项目(科技创新平台类)(No.2019B121201002)
- 黎煜满
- 中山大学大气科学学院,珠海 519082;广东省气象台(南海海洋气象预报中心),广州 510080
- 李磊
- 中山大学大气科学学院,珠海 519082;广东省环珠江口气候环境与空气质量变化野外科学观测研究站,广州 510275;南方海洋科学与工程广东省实验室(珠海),珠海 519082
- 谢洁岚
- 中山大学大气科学学院,珠海 519082;自然资源部海洋环境探测技术与应用重点实验室,广州 510300
- 赵伟
- 生态环境部华南环境科学研究所,广东省水与大气污染防治重点实验室,广州 510530
- 张阿思
- 广东省气象台(南海海洋气象预报中心),广州 510080
- 郑昱
- 广东省韶关生态环境监测中心站,韶关 512026
- 范绍佳
- 中山大学大气科学学院,珠海 519082;广东省环珠江口气候环境与空气质量变化野外科学观测研究站,广州 510275;南方海洋科学与工程广东省实验室(珠海),珠海 519082
- 摘要:利用2015—2019年韶关市3个地面环境空气质量站逐时臭氧(O3)观测资料、同期的气象资料和2017—2019年广东南岭站逐时O3观测资料及同期气象资料,采用Kolmogorov-Zurbenko (KZ)滤波、多元回归和后向轨迹潜在来源贡献分析等统计方法,分析了韶关市O3浓度不同尺度变化特征与气象要素的关系.结果表明:①不同时间段气象因素对韶关市盆地区域O3浓度变化的影响不同:2015年1月—2016年6月及2018年6月—2019年6月,气象因素有利于降低近地面O3浓度;而2016年6月—2018年6月及2019年下半年,气象因素有利于增加地面O3浓度.2018年6月前,气象因素影响导致近地面O3浓度的增加或降低幅度范围在2 μg?m-3;2018年6月后,气象因素影响造成地面O3浓度的增加或降低幅度范围上升到4 μg?m-3,说明韶关市O3受气象因素影响存在增大趋势.②南岭山区O3浓度长期维持100 μg·m-3,气象因素对南岭山区的O3浓度影响小,在西风和山谷风环流影响下,会对韶关市区盆地区域O3长期变化趋势起调节作用.③O3短期分量受太阳辐射因子影响较大.污染过程前两天,降水增多,经一天湿清除作用后,污染过程前一天,相对湿度降低,云量减少,日照时间加长,太阳辐射增多,温度上升,降水减少,风速下降等,有利于O3的生成,并经一天O3累积后超出污染阈值.
- Abstract:Based on the hourly data of Ozone (O3) and other meteorological elements at three ground-based automatic air quality station during 2015 to 2019 and at Nanling station of Guangdong during 2017 to 2019, respectively, the relation between O3 concentration and other meteorological elements at different scales were analyzed using the statistical metrics such as the Kolmogorog-Zurbenko (KZ) filter, multiple regression and backward trajectory. The results showed that: ① The effects of meteorological elements on O3 concentration were different in different periods. the meteorological elements were favorable for reducing the O3 concentration near the surface during January-June of 2015—2016 and June-June of 2018—2019; The meteorological elements were favorable for increasing the O3 concentration near the surface during June-June of 2016—2018 and June-December of 2019; The increase or decrease of surface O3 concentration caused by meteorological elements was in the range of 0~2 μg·m-3 before June 2018. The increase or decrease of surface O3 concentration caused by meteorological elements increased to 4 μg·m-3 after June 2018, indicating that the effects of meteorological elements on O3 concentrations in Shaoguan city were enhanced. ②The concentration of O3 in Nanling station was maintained at 100 μg·m-3 for a long time. Meteorological elements had little influence on the concentration of O3 variation in the Nanling mountains. Nanling mountains played a regulatory role in the long-term change trend of O3 in the Shaoguan urban city under the influence of the westerly wind and valley wind circulation. ③The short-term component of O3 was greatly affected by solar radiation factor. The precipitation gave a wet cleaning on the local area which caused a reduction of the pollution process before two days of the pollution day, however, after the precipitation, the lower relative humidity, less cloud cover, longer sunshine duration, more solar radiation, higher temperature and lower wind speed which caused a higher concentration of O3 tended to have a O3 pollution event on the next day.