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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 28, issue 10
Ann. Geophys., 28, 1879–1885, 2010
https://doi.org/10.5194/angeo-28-1879-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 1879–1885, 2010
https://doi.org/10.5194/angeo-28-1879-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 12 Oct 2010

ANGEO Communicates | 12 Oct 2010

Tropospheric ozone (TOR) trend over three major inland Indian cities: Delhi, Hyderabad and Bangalore

Pavan S. Kulkarni1, Sachin D. Ghude2, and D. Bortoli1,3 Pavan S. Kulkarni et al.
  • 1Geophysics Centre of Evora (CGE), University of E' vora, 7000 E' vora, Portugal
  • 2Indian Institute of Tropical Meteorology, Pune, 411008, India
  • 3Institute for Atmospheric Science and Climate (ISAC-CNR), Bologna, Italy

Abstract. An analysis of tropospheric column ozone using the NASA Langley TOR data during 1979–2005 has been done to investigate the trend over major Indian cities Delhi, Hyderabad and Bangalore. India was under social democratic-based policies before 1990s. Economic Liberalization began in nineties which lead to a significant growth in industrial, energy and transport sectors in major cities. Our analysis shows that there is a systematic increase in the number of months with higher tropospheric ozone values after 1990. A comparison of TOR climatology before and after 1990 over these cities shows evidence of increase in the tropospheric ozone after 1990. Trend obtained from the model shows significant change during monsoon over Delhi and during pre-monsoon and post-monsoon over Hyderabad and Bangalore. The present analysis using TOR technique demonstrates the TOR potential to detect changes in tropospheric ozone over large cities which are impacted by large anthropogenic pollution.

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