The effect of Antarctic O3 decline on night airglow intensity of Na5893A, O5577A, OH emissions and its correlation with total solar flare numbers

Details The effect of Antarctic O3 decline on night airglow intensity of Na5893A, O5577A, OH emissions and its correlation with total solar flare numbers The effect of Antarctic O3 decline on night airglow intensity of Na5893A, O5577A, OH emissions and its correlation with total solar flare numbers

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993em%26p...61..175m&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 61, no. 2, p. 175-182.

Physics

4

Airglow, Antarctic Regions, Emission Spectra, Ozone Depletion, Solar Terrestrial Interactions, Hydroxyl Radicals, Oxygen Spectra, Photochemical Reactions, Sodium, Solar Flares, Sunspots

Scientific paper

The paper presents the effect of O3 depletion on different night airglow emission lines. Calculations based on chemical kinetics show that the airglow intensity of Na 5893 A, O 5577 A, and OH band emissions will also be affected due to the depletion of O3 concentration. Intensity of Na 5893 A is calculated theoretically for Halley Bay (76 deg S, 27 deg W), British Antarctic Survey Station, during the period 1973 to 1984. It is concluded from the covariation of different emission lines that O 5577 A and OH emissions also follow the same trend of variation. A study has been made to find the correlation between the depletion of O3 concentration and total solar flare numbers. Important results are as follows: (1) depletion of O3 is oscillatory up to 7932 solar flare numbers; and the average trend of variation of O3 concentration is downward (i.e., O3 is depleted with the increase of total solar flare numbers) and (2) afterwards, it follows an upward trend. A possible explanation of such variation type is presented.

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