Ozone decline and its effect on night airglow intensity of Na 5893 A at Dumdum (22.5°N, 88.5°E) and Halley Bay (76°S, 27°W)

摘要

The paper presents the effect of O_3 depletion on night airglow emission of Na 5893A 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 A line will also be affected due to the depletion of O_3 concentration. The nature of yearly variation and seasonal variation of the intensity of Na 5893A line for the above two stations are shown and compared. It is shown that the rate of decrease of intensity of Na 5893 A line is comparatively more at Halley Bay due to the dramatic decrease of Antarctic O_3 concentration. A possible explanation for this dramatic decrease of Antarctic O_3 concentration is also mentioned.