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Anomalous low tropospheric column ozone over Eastern India during the severe drought event of monsoon 2002: A case study

Ghude, SD and Kulkarni, SH and Kulkarni, PS and Kanawade, VP and Fadnavis, S and Pokhrel, S and Jena, C and Beig, G and Bortoli, D (2011) Anomalous low tropospheric column ozone over Eastern India during the severe drought event of monsoon 2002: A case study. Environmental Science and Pollution Research, 18 (8). pp. 1442-1455.

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Background, aim, and scope: The present study is an attempt to examine some of the probable causes of the unusually low tropospheric column ozone observed over eastern India during the exceptional drought event in July 2002. Method: We examined horizontal wind and omega (vertical velocity) anomalies over the Indian region to understand the large-scale dynamical processes which prevailed in July 2002. We also examined anomalies in tropospheric carbon monoxide (CO), an important ozone precursor, and observed low CO mixing ratio in the free troposphere in 2002 over eastern India. Results and discussion: It was found that instead of a normal large-scale ascent, the air was descending in the middle and lower troposphere over a vast part of India. This configuration was apparently responsible for the less convective upwelling of precursors and likely caused less photochemical ozone formation in the free troposphere over eastern India in July 2002. Conclusion: The insight gained from this case study will hopefully provide a better understanding of the process controlling the distribution of the tropospheric ozone over the Indian region.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer.
Uncontrolled Keywords: ozone, atmospheric convection; atmospheric pollution; carbon monoxide; drought; mixing ratio; monsoon; ozone; photochemistry; spatiotemporal analysis; troposphere, air; air pollutant; article; atmosphere; chemistry; drought; environmental monitoring; geography; India, Air Movements; Air Pollutants; Atmosphere; Droughts; Environmental Monitoring; Geography; India; Ozone, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 28 Oct 2014 06:34
Last Modified: 28 Oct 2014 06:34

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