Surface Ozone Values in Anomalous Summer 2010 Measured in Obninsk

N. V. Tereb, L. I. Milekhin, V. L. Milekhin, V. D. Gnilomedov, D. R. Nechaev, L. K. Kulizhnikova, and V. V. Shirotov

Given and analyzed are the results of the measuring of concentration of ozone O3, nitrogen oxides NOx, and carbon monoxide CO at the surface as well as the sum of hydrocarbons and the aerosol optical depth in Obninsk (Kaluga oblast) during the warm period 2010 and 2011. The relationship between the air temperature and the maximum daily ozone values in May–September 2010 are characterized by the higher correlation coefficient than in May–September 2011: 0.82 ± 0.05 versus 0.64 ± 0.07. Increased concentration of surface ozone in Obninsk in July–August 2010 as compared to the similar period in 2011 were caused by the higher concentrations of the compounds–predecessors of ozone. The concentration of O3 in August 2010 exceeded 200g/m3 and was never registered in Obninsk during the observation period of 2004–2011. This is associated with the air masses that came to Obninsk from the areas with peat and forest fires that resulted in the dramatic increase in surface concentrations of NOx, CO, and hydrocarbons.

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