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Changes in the concentration of mesospheric ozone during the total solar eclipse

Authors:	VV Agashe SM Rathi

Institution:	Department of Physics, University of Poona, Poona-411 007, India

Abstract:	Measurements of dayglow radiance of $O_{2} (^{1} Δ_{g})$ and OH(7,2) bands are reported. Ground based photometers were used to monitor zenith radiance of 1270 and 694 nm emissions during the total solar eclipse of 16 February 1980. Altitude distribution of 1270 nm intensity was derived from ground based observations. A set of altitude distributions of $O_{2} (^{1} Δ_{g})$ were thus obtained throughout the eclipse. These altitude distributions were converted into ozone distributions using the rate equations for formation and loss of ozone and $O_{2} (^{1} Δ_{g})$ molecules. Results indicate an increase in the ozone concentration at mid-eclipse. OH(7,2) emission did not show enhancement during totality. This may mean that there was no increase in OH concentration during the eclipse.

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