内蒙古地区近地面臭氧浓度时空分异及主导气象因子探讨

Spatial and temporal ozone (O₃) distribution characteristics were examined using air quality monitoring data from 12 leagues and cities in Inner Mongolia in 2017. The impact of meteorological factors on O₃ concentration and distribution was explored using a generalized additive model (GAM). Above-standard O₃ concentration was observed in 12 leagues and cities in Inner Mongolia to varying degrees. The average monthly O₃ concentration showed a trend of increasing before decreasing over the span of a year, peaking with the worst pollution from April to September and reaching the annual maximum (136 μg•m^-3) in July. Regional regularity was as follows: O₃ concentration was the highest in central Inner Mongolia, moderate in western Inner Mongolia, and lower in eastern Inner Mongolia. The dominant meteorological factors on O₃ concentration change in Inner Mongolia were identified by constructing a GAM. Temperature was the primary meteorological factor affecting O₃ concentration in all areas; relative humidity, sunshine duration, and wind speed were the secondary dominant factors in eastern, central, and western Inner Mongolia, respectively.