遵义臭氧时空变化特征及与气象条件的关系

为了研究云贵高原城市遵义O₃分布特征及与气象条件的关系,通过对遵义市城区2014—2017年连续4年环境监测站和气象站观测数据的分析。结果表明：（1）遵义市O₃浓度超标率较之前增长较快;（2）遵义市O₃浓度基本呈现夏、秋季高,春、冬季低的季节特征,O_3-8h浓度最高月份一般出现在5月,峰值为52.71 μg/m ³,谷值出现在11月为26.18 μg/m ³。这与夏、秋季平均日照时间长、平均气温高有很大的关系;（3）遵义市O₃浓度日变化曲线呈单峰型分布,白天浓度明显高于夜间,峰值一般出现在16:00左右;（4）城市大气污染主要源自局地排放和化学转化,太阳辐射、气温、风速、日照和相对湿度是影响城区O₃浓度的主要气象因素,复杂地形下降水量和气压对O₃浓度传输能力影响相对较弱。

Ozone in Zunyi: Spatio-temporal Variation Characteristics and the Relationship with Meteorological Conditions

The paper aims to study the distribution characteristics of O₃ in Zunyi of Yun-Gui plateau and their relationships with meteorological conditions. We analyzed the data from environment monitoring stations and weather stations in Zunyi during 2014-2017. The results showed that: (1) the concentration of O₃ in Zunyi fast exceeded the previous growth rate than before; (2) the concentration of O₃ in Zunyi was higher in summer and autumn, and lower in spring and winter; the highest concentration of O₃ was in May, the peak value of O₃ was in November (52.71 μg/m ³), and the valley value was 26.18 μg/m ³; this was closely related to the long average sunshine and the high average temperature in summer and autumn; (3) the day variation curve of O₃ concentration in Zunyi showed a single peak distribution, the concentration at daytime was obviously higher than that at night, and the peak value generally appeared at about 16:00; (4) urban air pollution mainly came from local emissions, and chemical transformation, solar radiation, air temperature, wind speed, sunshine and relative humidity were the main meteorological factors affecting the concentration of O₃ in urban area, and the influence of the precipitation amount in complex terrain and air pressure on the transport capacity of O₃ concentration were relatively weak.