Occurrence of High Nocturnal Surface Ozone at a Tropical Urban Area
The occurrence of high nocturnal surface ozone over a tropical urban area (23̊ 32′16.99″ N and 87̊ 17′ 38.95″ E) is analyzed in this paper. Five incidences of nocturnal ozone maxima are recorded during the observational span of two years (June, 2013 to May, 2015). The maximum and minimum values of the surface ozone during these five occasions are 337.630 μg/m3 and 13.034 μg/m3 respectively. HYSPLIT backward trajectory analyses and wind rose diagrams support the horizontal transport of ozone from distant polluted places. Planetary boundary layer characteristics, concentration of precursor (NO2) and meteorology are found to play important role in the horizontal and vertical transport of surface ozone during nighttime.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1339752Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 772
 S. Kuang, M. J. Newchurch, J. Burris, L. Wang, P. I. Buckley, S. Johnson, K. Knupp, G. Huang, D. Phillips, W. Cantrell, “Nocturnal ozone enhancement in the lower troposphere observed by lidar,” Atmospheric Environment Vol 45, pp 6078 – 6084, 2011.
 U. Corsmeier, N. Kalthoff, O. Kolle, M. Kotzian and F. Fiedler, “Ozone concentration jump in the stable nocturnal boundary layer during a LLJ-event,” Atmospheric Environment Vol 31, pp1977 – 1989, 1997.
 I. Eliasson, S. Thorsson and Y. Andersson-Sköld, “Summer nocturnal ozone maxima in Göteborg, Sweden,” Atmospheric Environment Vol 37, pp 2615 – 2627, 2003.
 S.I.V. Sousa, M.C.M. Alvim-Ferraz and F. G. Martins, “Identification and origin of nocturnal ozone maxima at urban and rural areas of Northern Portugal - Influence of horizontal transport. Atmospheric Environment Vol 45, pp 942 – 956, 2011.
 X-M. Hu, P. M. Klein, M. Xue, F. Zhang, D. C. Doughty, R. Forkel, E. Joseph and J. D. Fuentes, “Impact of the vertical mixing induced by low-level jets on boundary layer ozone concentration,” Atmospheric Environment Vol 70, pp 123 – 130, 2013.
 N. R. Awang, N. A. Ramli, A. S. Yahaya and M. Elbayoumi, “High Nighttime Ground-Level Ozone Concentrations in Kemaman: NO and NO2 Concentrations Attributions,” Aerosol and Air Quality Research, Vol 15, pp 1357–1366, 2015.
 D. Ghosh, S. Lal and U. Sarkar, “High nocturnal ozone levels at a surface site in Kolkata, India: Trade-off between meteorology and specific nocturnal chemistry,” Urban Climate Vol 5, pp 82 – 103, 2013.
 West Bengal Pollution Control Board, www.wbpcb.gov.in.
 National Oceanic and Atmospheric Administration (NOAA) - Air Resources Laboratory (ARL), http://ready.arl.noaa.gov/READYamet.php
 R. R. Draxler and G. D. Hess, “An overview of the HYSPLIT_4 modelling system for trajectories, dispersion, and deposition,” Australian Meteorological Magazine Vol 47, pp 295 – 308, 1998.
 S. Dey. S. Gupta and U. Mahanty, “Study of particulate matters, heavy metals and gaseous pollutants at Gopalpur (23°29ʹ52.67ʺ N, 87°23ʹ46.08ʺE), a tropical industrial site in eastern India,” IOSR Environmental Science, Toxicology and Food Technology Vol 8, pp 01-13, 2014.
 S. Lal, M. Naja and B. H. Subbaraya, “Seasonal variations in surface ozone and its precursors over an urban site in India,” Atmospheric Environment Vol 34, pp 2713 – 2724, 2000.
 S. Dey, C. Pati and S. Gupta, “Measurement and Analysis of Surface Ozone and Its Precursors at Three Different Sites in an Urban Region in Eastern India,” Environica Vol 1, pp112 – 120, 2014.
 M. Naja and S. Lal, “Solar eclipse induced changes in surface ozone at Ahmedabad,” Indian Journal of Radio & Space Physics Vol 26, pp 312 – 318, 1997.
 J. Colls, “Air Pollution” Second Edition. London, Taylor & Francis Group, 2002.
 S. Lal, S. Venkataramani, S. Srivastava, S, Gupta, C. Mallik, M. Naja, T. Sarangi, Y. B. Acharya andX. Liu, “Transport effects on the vertical distribution of tropospheric ozone over the tropical marine regions surrounding India,” Journal of Geophysical Research Atmospheres Vol 118, pp 1513 – 1524, 2013.
 P. R. Nair, L. M. David, I. A. Girach and S. K. George, “Ozone in the marine boundary layer of Bay of Bengal during post-winter period: Spatial pattern and role of meteorology,” Atmospheric Environment Vol 45, pp 4671 – 4681, 2011.