Abstract Surface observations on trace gases such as ozone (O3), oxides of nitrogen (August 2014–May 2017) and carbon monoxide (January 2016–May 2017) were used to investigate O3 chemistry. Study shows O3 concentration is high during winter with a mean value of 35.54 ± 7.16 ppbv and low concentration in monsoon with a mean value of 12.70 ± 3.55 ppbv. Oxides of nitrogen (NOx = NO + NO2) concentrations are high during pre-monsoon followed by winter, post-monsoon and monsoon. Mean carbon monoxide (CO) concentrations were observed to be 201.21 ± 36.90 ppbv, 222.61 ± 37.31 ppbv, 170.14 ± 14.34 ppbv, 249.59 ± 52.03 ppbv respectively during winter, pre monsoon, monsoon and post-monsoon. Study suggests that irrespective of seasonal changes, strong correlation coefficients (0.97–0.99) were observed between O3 and air temperature. Solar radiation showed an observable influence on surface O3 concentrations in the lower troposphere. The rate of change of O3 concentration during morning and evening hours at the study site were 3.6 ppbv/h and −3.9 ppbv/h respectively characterizing the site as sub-urban category. The mass concentrations of black carbon (BC) measurements (January–February 2016) were also used to understand its influence on CO and O3 concentrations. The BC showed a strong positive correlation (0.90) with CO whereas strong negative correlation (0.90) with O3. Study also indicates a strong influence of atmospheric boundary layer height on O3 and BC concentrations. Study revealed that emissions from crop residue burning during winter and forest fire during pre-monsoon have significant influence on enhancing CO concentrations at study site.

中文翻译：

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臭氧变异性：受其前体和气象参数的影响——一项调查

摘要 对臭氧 (O3)、氮氧化物（2014 年 8 月至 2017 年 5 月）和一氧化碳（2016 年 1 月至 2017 年 5 月）等痕量气体的表面观测用于研究 O3 化学。研究表明，冬季 O3 浓度高，平均值为 35.54±7.16 ppbv，季风浓度低，平均值为 12.70±3.55 ppbv。在季风前、冬季、季风后和季风期间，氮氧化物 (NOx = NO + NO2) 浓度很高。观察到平均一氧化碳 (CO) 浓度分别为 201.21 ± 36.90 ppbv、222.61 ± 37.31 ppbv、170.14 ± 14.34 ppbv、249.59 ± 52.03 ppbv，在冬季、季风前和季风过后。研究表明，无论季节变化如何，在 O3 和气温之间都观察到很强的相关系数 (0.97-0.99)。太阳辐射对对流层低层的表面 O3 浓度显示出可观察到的影响。研究地点早上和晚上的 O3 浓度变化率分别为 3.6 ppbv/h 和 -3.9 ppbv/h，表明该地点属于郊区类别。黑碳 (BC) 的质量浓度测量值（2016 年 1 月至 2 月）也用于了解其对 CO 和 O3 浓度的影响。BC 与 CO 呈强正相关（0.90），而与 O3 呈强负相关（0.90）。研究还表明大气边界层高度对 O3 和 BC 浓度有很大影响。研究表明，冬季作物残留物燃烧和季风前森林火灾的排放对提高研究地点的 CO 浓度有显着影响。