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Ozone depletion; airglow intensity

The paper presents the effect of O₃ depletion on night airglow emission of Na 5893 Å line at Dumdum (22.5°N, 88.5°E), India and Halley Bay (76°S, 27°W), a British Antarctic service station. Calculations based on chemical kinetics show that the airglow intensity of Na 5893 Å line will also be affected due to the depletion of O₃ concentration. The nature of yearly variation and seasonal variation of the intensity of Na 5893 Å line for the above two stations are shown and compared. It is shown that the rate of decrease of intensity of Na 5893 Å line is comparatively more at Halley Bay due to the dramatic decrease of Antarctic O₃ concentration. A possible explanation for this dramatic decrease of Antarctic O₃ concentration is also mentioned.

P K Jana¹ S C Nandi²

1. Department of Chemistry, Institute of Education (P.G) for Women, Chandernagore, Hooghly, West Bengal - 712 138, India
2. Serampore High School, Serampore, Hooghly, West Bengal - 712 201, India

Published

October 2006

Manuscript received

8 October 2004

Manuscript revised

27 February 2006

Accepted

10 May 2006