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(O_(3))观测资料、同期的气象资料和2017—2019年广东南岭站逐时O_(3)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O_(3)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O_(3)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O_(3)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O_(3)浓度.2018年6月前,气象因素影响导致近地面O_(3)浓度的增加或降低幅度范围在2μg·m^(-3);2018年6月后,气象因素影响造成地面O_(3)浓度的增加或降低幅度范围上升到4μg·m^(-3),说明韶关市O_(3)受气象因素影响存在增大趋势.(2)南岭山区O_(3)浓度长期维持100μg·m^(-3),气象因素对南岭山区的O_(3)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O_(3)长期变化趋势起调节作用.(3)O_(3)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O_(3)的生成,并经一天O_(3)累积后超出污染阈值.
Based on the hourly data of Ozone(O_(3))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 O_(3)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 O_(3)concentration were different in different periods.the meteorological elements were favorable for reducing the O_(3)concentration near the surface during January-June of 2015—2016 and June-June of 2018—2019;The meteorological elements were favorable for increasing the O_(3)concentration near the surface during June-June of 2016—2018 and June-December of 2019;The increase or decrease of surface O_(3)concentration caused by meteorological elements was in the range of 0~2μg·m^(-3)before June 2018.The increase or decrease of surface O_(3)concentration caused by meteorological elements increased to 4μg·m^(-3)after June 2018,indicating that the effects of meteorological elements on O_(3)concentrations in Shaoguan city were enhanced.(2)The concentration of O_(3)in Nanling station was maintained at 100μg·m^(-3)for a long time.Meteorological elements had little influence on the concentration of O_(3)variation in the Nanling mountains.Nanling mountains played a regulatory role in the long-term change trend of O_(3)in the Shaoguan urban city under the influence of the westerly wind and valley wind circulation.(3)The short-term component of O_(3)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 O_(3)tended to have a O_(3)pollution event on the next day.
作者
黎煜满
李磊
谢洁岚
赵伟
张阿思
郑昱
汪海恒
范绍佳
LI Yuman;LI Lei;XIE Jielan;ZHAO Wei;ZHANG Asi;ZHENG Yu;WANG Haiheng;FAN Shaojia(School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519082;Guangdong Meteorological Observatory,Guangzhou 510080;Shaoguan Ecological Environment Monitoring Center of Guangdong Province,Shaoguan 512026;Shaoguan Meteorological Bureau,Shaoguan 512000;Key Laboratory of Marine Environmental Survey Technology and Application,Ministry of Natural Resources,P.R.China,Guangzhou 510300;Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary,Guangzhou 510275;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082;Guangdong Key Laboratory for Water and Air Pollution Control,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510530)
出处
《环境科学学报》
CAS
CSCD
北大核心
2023年第1期128-139,共12页
Acta Scientiae Circumstantiae
基金
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)。
