THE EFFECT OF ANTARCTIC O3 DECLINE ON NIGHT AIRGLOW INTENSITY OF NA5893-ANGSTROM, O5577-ANGSTROM, OH EMISSIONS AND ITS CORRELATION WITH TOTAL SOLAR-FLARE NUMBERS

The paper presents the effect of O3 depletion on different night airgl ow emission lines. Calculations based on chemical kinetics show that t he airglow intensity of Na5893angstrom, O5577angstrom and OH band emis sions will also be affected due to the depletion of O3 concentration. Intensity of Na5893angstrom is calculated theoretically for Halley Bay (76-degrees-S,27-degrees-W), British Antarctic Survey Station, during the period 1973 to 1984. It is concluded from the covariation of diff erent emission lines that O5577angstrom and OH emissions also follow t he same trend of variation. A study has been made to find the correlat ion between the depletion of O3 concentration and total solar flare nu mbers. Important results are as follows: (i) Depletion of O3 is oscill atory upto 7932 solar flare numbers. The average trend of variation of O3 concentration is downward, i.e., O3 is depleted with the increase of total solar flare numbers. (ii) Afterwards, it follows a upward tre nd. Possible explanation of such type variation is also presented.