Effect of ozone decline on night airglow intensity of Na 5893?? at Nagpur (23oN, 72.5oE), India and Halley Bay (76oS, 27oW)
文摘
A critical analysis has been made on the long-term yearly and seasonal variation of ozone concentration at Nagpur (23oN, 72.5oE), India and Halley Bay (76oS, 27oW), a British Antarctic Survey Station. The effect of O3 depletion on night airglow emission of Na 5893?? line at Nagpur and Halley Bay has been studied. Calculations based on chemical kinetics show that the airglow intensity of Na 5893?? line has also been affected due to the depletion of O3 concentration. The yearly variations and seasonal variations of intensity of Na 5893?? line for the above two stations have been shown and compared. It has been observed that the rate of decrease of intensity of Na 5893?? line is comparatively more at Halley Bay due to dramatic decrease of Antarctic O3 concentration than that at Nagpur.