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Journal Article

High levels of ozone and related gases over the Bay of Bengal during winter and early spring of 2001

MPS-Authors

Chand,  D.
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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Brasseur,  Guy P.       
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37325

Schultz,  Martin G.
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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Citation

Lal, S., Chand, D., Sahu, L., Venkataramani, S., Brasseur, G. P., & Schultz, M. G. (2006). High levels of ozone and related gases over the Bay of Bengal during winter and early spring of 2001. Atmospheric Environment, 40, 1633-1644. doi:10.1016/j.atmosenv.2005.10.060.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-020C-4
Abstract
Measurements Of Surface ozone and related trace gases were made over a broader region of the Bay of Bengal along with measurements over the
Indian Ocean and the Arabian Sea during a Bay of Bengal Experiment
(BOBEX) conducted from 18 February to 23 March, 2001. Higher levels of
ozone (60-64ppbv) were observed over the central Bay of Bengal (10-15N,
84-86E) and not near the coastal regions due to different types of wind
patterns. Ozone levels in the south of 12N are observed to be higher
over the Bay of Bengal than the average levels measured over the Arabian
Sea during all the four INDOEX cruises conducted in each winter from
1996 to 1999. The elevated O(3) level is consistent with simultaneously
measured higher levels of CO, CH(4) and SF(6) over the Bay of Bengal.
These observations together with general wind patterns, 7 days back
trajectories and results from a three-dimensional model simulations
suggest that higher levels of these trace gases over the Bay of Bengal
are due to transport from the continent. These results also suggest that
the air over the Bay of Bengal was found to be more polluted than the
Arabian Sea during this season. (c) 2005 Elsevier Ltd. All rights
reserved.