Arid Zone Research ›› 2020, Vol. 37 ›› Issue (6): 1504-1512.doi: 10.13866/j.azr.2020.06.15

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Spatial-temporal differentiation of near-surface ozone concentration and dominant meteorological factors in Inner Mongolia

CHEN Zhi-qing1, SHAO Tian-jie1, ZHAO Jing-bo1, 2, CAO Jun-ji2, YUE Da-peng1   

  1. (1. School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, Shaanxi, China; 2. Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, Shaanxi, China)
  • Received:2020-02-04 Revised:2020-07-30 Online:2020-11-15 Published:2021-01-24

Abstract: 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 ob? served 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 Sep? tember 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 Mongo? lia. The dominant meteorological factors on O3 concentration change in Inner Mongolia were identified by construct? ing a GAM. Temperature was the primary meteorological factor affecting O3 concentration in all areas; relative hu? midity, sunshine duration, and wind speed were the secondary dominant factors in eastern, central, and western In? ner Mongolia, respectively.

Key words: ozone, spatial and temporal distribution, meteorological factors, GAM, Inner Mongolia