塔城地区南部大雾天气影响与评估

Impact and Evaluation of the Heavy Fog Weather in the South of Tacheng Prefecture

摘要: 应用1961~2017年逐日地面观测资料分析塔城地区南部大雾天气的变化特征，结果表明：塔城地区南部多年平均雾日为10.3 d，呈现增多趋势；大雾天气存在明显的季节差异，主要分布在11月至次年3月，其中12月发生频次最高；大雾天气严重影响高速公路通行状况，结合实际交通服务需求，将大雾服务划分为3级服务期；塔城地区南部冬季污染最严重，其次是春季和秋季，夏季空气最好，各月中以1月、12月污染状况最为严重，主要污染物为PM_2.5、PM₁₀、O₃；大雾天气的增加及持续与空气质量下降、污染加重之间存在明显的相关关系。

Abstract: Using the observation data during 1961-2017, the temporal and spatial distribution characteristics of fog weather were analyzed in the south of Tacheng Prefecture. The results showed that the average fog days were 10.3 d, and the fog days were reducing. The fog weather is mainly distributed from November to March of following year, Heavy fog weather has a serious impact on traffic conditions of highway. According to the actual demand of traffic service, the fog service was divided into 3 service periods. In the south of Tacheng Prefecture, the main pollution period is in Winter, followed by Spring and Autumn. The most serious month is in January and December. The primary pollutants were PM_2.5, PM₁₀ and O₃. The persistent heavy fog weather can further deteriorate the air quality.