Journal of Atmospheric Chemistry

, Volume 73, Issue 1, pp 1–27 | Cite as

Carbonaceous aerosols over Pune and Hyderabad (India) and influence of meteorological factors

  • Kaushar Ali
  • A. S. Panicker
  • G. Beig
  • R. Srinivas
  • P. Acharja


Sampling of particulate matter with aerodynamic diameter cut off at 2.5 μm (PM2.5) has been carried out over a semi urban site of Pune and an urban site of Hyderabad. Analysis of elemental Carbon (EC) and Organic Carbon (OC) present in PM2.5 was carried out using advanced Desert Research Institute’s (DRI) Thermal/Optical Carbon Analyzer operated on IMPROVE_ A (Interagency Monitoring of Protected Visual Environments_ A) protocol. It is found that average concentration of EC and OC both at Pune and Hyderabad was highest during winter season and lowest during monsoon season. Winter high is mainly controlled by inversion, whereas monsoon low is due to rain-out and wash-out process. OC/EC ratio showed higher variation over Pune compared to that over Hyderabad in different seasons, indicating divergent sources of emission of OC and EC at Pune. Formation of Secondary Organic Carbon (SOC) has also been identified as one of the reasons for wide variation in OC/EC ratio value in different seasons over both the sites.


Organic carbon Elemental carbon Emission Meteorological factors 



Authors sincerely acknowledge Prof. B.N. Goswami, Director, IITM, Pune for his continuous support, encouragement and guidance to carry out this study. The assistance provided by Mr. Naveed Shaikh in the analysis of OC and EC is also acknowledged with thanks.


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© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Kaushar Ali
    • 1
  • A. S. Panicker
    • 1
  • G. Beig
    • 1
  • R. Srinivas
    • 1
  • P. Acharja
    • 1
  1. 1.Indian Institute of Tropical MeteorologyPuneIndia

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