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

doi:10.13866/j.azr.2020.06.15

摘要/Abstract

摘要： 利用内蒙古地区2017年12个盟市的空气质量监测数据,研究了O3浓度的时空分布特征，基于GAM模型探讨了气象因素对O3浓度变化及分布的影响。结果表明：内蒙古地区12个盟市均存在不同程度的O3浓度超标情况；O3月均浓度呈先升高后降低的变化特征，4—9月O3浓度最高，污染最为严重，且在7月达到全年最高值（136 μg· m-3）；地域规律呈现出内蒙古中部地区O3浓度最高，西部地区O3浓度居中，东部地区O3浓度较低的特征。通过构建 GAM模型对内蒙古地区12个盟市影响O3浓度变化的主导气象因子进行识别，发现气温是影响整个内蒙古地区O3 浓度变化的最主要气象因子，而相对湿度、日照时数、风速分别是内蒙古东部、中部和西部地区影响O3浓度变化的第二主导气象因子。

关键词: 臭氧, 时空分布, 气象因子, GAM模型, 内蒙古地区

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

陈志青, 邵天杰, 赵景波, 曹军骥, 岳大鹏. 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[J]. 干旱区研究, 2020, 37(6): 1504-1512.

CHEN Zhi-qing, SHAO Tian-jie, ZHAO Jing-bo, CAO Jun-ji, YUE Da-peng. Spatial-temporal differentiation of near-surface ozone concentration and dominant meteorological factors in Inner Mongolia[J]. Arid Zone Research, 2020, 37(6): 1504-1512.

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