摘要
随着大气污染防治工作的深入实施,广东省PM_(2.5)等大气污染物浓度逐步降低,O_(3)取代PM_(2.5)成为广东省空气污染的首要污染物。深入了解广东省O_(3)污染特征对O_(3)污染科学治理与防控具有非常重要的意义。利用2016—2020年广东省102个国家环境空气质量监测站监测数据以及臭氧污染天气型数据,分析O_(3)污染特征,解析O_(3)污染重点防控时间与重点城市。结果表明,(1)2016—2020年期间,广东省O_(3)-8h年评价质量浓度上升8.7%,是空气质量评价的6项污染物中唯一升高的污染物。O_(3)-8h质量浓度超标使广东省各年度空气质量优良天数比例分别减少了2.8、4.8、5.2、8.9、4.2个百分点。(2)广东省O_(3)-8h质量浓度日均值高值主要分布在4—5月、8—11月,在这两个时段,广东省O_(3)-8h质量浓度日均值超过二级标准限值的天数占全年超标天数的97.6%以上,说明应加强对这两个时段O_(3)污染管控。(3)弱冷空气、台风外围、副高、反气旋环流等4种天气型,与O_(3)污染关系最为密切,应加强气象与空气质量联合预报预警,在污染天气型到来前部署污染防控工作。(4)珠三角区域臭氧达标敏感期为8—11月,需重点管控广州市、东莞市、佛山市、肇庆市、深圳市、珠海市、中山市、江门市;粤东、粤西区域臭氧达标敏感期为9—11月,需重点管控汕尾市、汕头市、潮州市、茂名市、阳江市、湛江市;粤北区域臭氧达标敏感期为9—10月,需重点管控韶关市、清远市。在上述时间段加强对应城市的O_(3)污染管控,减少O_(3)污染天数,有助于提升空气质量优良天数比例。
With the in-depth implementation of air pollution prevention and control,pollutants concentration such as PM_(2.5)has gradually decreased in Guangdong Province,but O_(3)replaced PM_(2.5)as the primary pollutant of air pollution in Guangdong Province.Understanding of the characteristics of O_(3)pollution is of great significance for the scientific O_(3)pollution management and prevention in Guangdong Province.Monitoring data of 102 national ambient air quality monitoring stations and weather type data of ozone pollution from 2016 to 2020 were used to analyze the characteristics of O_(3)pollution and key time and key cities for O_(3)prevention and control in Guangdong Province.The results showed that(1)O_(3)-8h annual evaluation concentration in Guangdong Province increased by 8.7%from 2016 to 2020,which was the only elevated pollutant among the six pollutants in air quality evaluation.The excessive concentration of O_(3)-8h reduced excellent days ratio in Guangdong Province by 2.8,4.8,5.2,8.9 and 4.2 percentage points,respectively.(2)High daily average value of O_(3)-8h concentration mainly occurred in April–May and August–November.During these two periods,daily mean value of O_(3)-8h concentration in Guangdong Province exceeded the limit of Class II standard,accounted for more than 97.6%of the total number of days exceeding the standard,indicating that O_(3)pollution control in these two periods should be strengthened.(3)Four weather types including weak cold air,typhoon periphery,subtropical anticyclone,and anticyclone circulation,were most closely related to O_(3)pollution.Air quality forecasts and warnings should be strengthened so that pollution prevention and control can be deployed in advance when relevant weather types occur.(4)Sensitive period for ozone compliance in Pearl River Delta region was from August to November,when Guangzhou,Dongguan,Foshan,Zhaoqing,Shenzhen,Zhuhai,Zhongshan and Jiangmen need to be controlled;Sensitive period for ozone compliance in Eastern and Western Guangdong was from September to November,when Shanwei,Shantou,Chaozhou,Maoming,Yangjiang,and Zhanjiang need to be controlled;Sensitive period for ozone compliance in Northern Guangdong was from September to October,when Shaoguan and Qingyuan need to be controlled.Ozone Pollution Prevention and Control in key cities should be strengthened during the relevant time period,to reduce O_(3)pollution days and increase excellent days ratio of air quality.
作者
陈瑶瑶
廖彤
汪宇
沈劲
翟宇虹
叶斯琪
陈多宏
陈靖扬
CHEN Yaoyao;LIAO Tong;WANG Yu;SHEN Jin;ZHAI Yuhong;YE Siqi;CHEN Duohong;CHEN Jingyang(Guangdong Ecological Environment Monitoring Center/State Environmental Key Laboratory of Regional Air Quality Monitoring/Guangdong Environmental Protection Key Laboratory of Secondary Air Pollution Research,Guangzhou 510308,P.R.China;Guangzhou Haizhu District Public Water Supply and Drainage Facilities Supervision Office,Guangzhou 510277,P.R.China;Guangdong Ecological Meteorology(Pearl River Delta Center for Environmental Meteorology Prediction and Warning),Guangzhou 510640,P.R.China)
出处
《生态环境学报》
CSCD
北大核心
2022年第12期2374-2381,共8页
Ecology and Environmental Sciences
基金
广东省重点领域研发计划项目(2019B110206001)
国家重点研发计划项目(2018YFE0106900,2018YFC0213902,2018YFC0213903)。
关键词
臭氧
达标敏感期
污染管控
天气型
优良天数比例
广东省
ozone
sensitive period for compliance
pollution control
weather type
excellent days ratio
Guangdong Province
