Y.V. Swamy 1, R. Venkanna1, G.N. Nikhil1, D.N.S.K. Chitanya1, P.R. Sinha2, M. Ramakrishna1, A.G. Rao1

  • 1 Indian Institute of Chemical Technology (IICT), Bioengineering and Environmental Centre, Hyderabad-500607, AP, India
  • 2 Tata Institute of Fundamental Research (TIFR), National Balloon Facility, Hyderabad, AP, India

Received: January 23, 2012
Revised: April 21, 2012
Accepted: April 21, 2012
Download Citation: ||https://doi.org/10.4209/aaqr.2012.01.0019  

  • Download: PDF

Cite this article:
Swamy, Y., Venkanna, R., Nikhil, G., Chitanya, D., Sinha, P., Ramakrishna, M. and Rao, A. (2012). Impact of Nitrogen Oxides, Volatile Organic Compounds and Black Carbon on Atmospheric Ozone Levels at a Semi Arid Urban Site in Hyderabad. Aerosol Air Qual. Res. 12: 662-671. https://doi.org/10.4209/aaqr.2012.01.0019



The surface level ozone (O3), nitrogen oxides (NOx = NO2 + NO), volatile organic compounds (VOCs), black carbon (BC) and meteorological parameters were continuously monitored for the period of one year (2010) at an urban site in Hyderabad using different trace gas monitors. The local emissions and meteorology have been found to play a significant role in diurnal variations of O3. The average peak time mixing ratios of O3 were observed in the range of 23 ± 8 to 67 ± 13 ppbv. Diurnal-seasonal variation of O3 and its precursors were also reported. The observed O3 concentrations were higher during the day than in the night. Maximum O3 concentrations in the three seasons i.e., summer, winter and monsoon were 56 ± 14 ppbv, 50 ± 9 ppbv, and 28 ± 10 ppbv, respectively. Weekday/weekend variation of O3 and its precursors were studied during the three seasons. High O3 concentrations were observed on weekends compared to weekdays, however, NOx and BC levels were found low during weekends. The weekend effect of O3 was high during winter. The annual average afternoon peak time O3 levels on weekends were 11% higher than the weekday concentrations. Weekday/weekend variations of NOx at morning traffic rush hour were 14%, 9% and 8% in winter, summer and monsoon, respectively. The annual mean of NOx and BC concentrations at weekend were observed to be lower than weekday about 10% and 9% respectively. VOC/NOx ratio is more (5) during weekend than weekday (4) which resulted in enhanced O3 formation.

Keywords: Trace gas; Ozone; Volatile organic compounds; Black carbon; Meteorology and oxides of nitrogen

Share this article with your colleagues 


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

77st percentile
Powered by
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.