气象条件对梅州城区臭氧浓度的影响研究

利用2014—2017年梅州城区的O3监测数据和相关气象观测资料,对本地区的O3的变化特征及影响O3的气象条件进行了相关分析。分析表明:梅州地区2014—2017年O3超标日数维持稳定水平,O3二级超标日数全部集中在春季和夏季; O3二级超标天数占AQI超标日数的比例快速上升,O3二级超标主要发生在3—8月,最多的是4月,O3是影响梅州市区空气质量重要因素。O3的月平均浓度与同期气温、日照显著正相关,与同期的气压呈显著负相关; O3污染过程中,O3的逐日浓度与同期气温、日照显著正相关,与同期的总云量、低云量、湿度呈显著负相关; O3污染过程中,O3浓度与地面及高空天气形势配置关系密切,O3浓度变化是多种气象要素共同作用的结果。

Study on the Effect of Meteorological Conditions on the Ozone Concentration in Meizhou City

Based on the O3 monitoring data and meteorological observation data in Meizhou from 2014 to 2017, the change characteristics of O3 in the region and the meteorological conditions affecting O3 were analyzed. It shows that: The numbers of non-attainment day of ozone maintain a stable leve in Meizhou area from 2014 to 2017, the secondary level non-attainment days of ozone are concentrated in spring and summer; The proportion of ozone concentration non-attainment days in AQI concentration non-attainment days increased rapidly, the secondary level non-attainment days of ozone mainly occurred from March to August, the most in April, ozone is an important factor affecting Meizhou urban air quality. The monthly average concentration of O3 was significantly positively correlated with the same temperature and sunshine, negatively correlated with pressure over the same period; the process of ozone pollution, the daily concentration of O3 with the same temperature and sunshine was significantly positively correlated, negatively related to total cloudiness, with the same period of low cloudiness and humidity; the process of ozone pollution, ozone concentration and the ground and high altitude weather situation configuration is closely related to changes of ozone concentration is the interaction of various meteorological elements results.