The long-term trend of ozone at heights from 80 to 100 km at the mid-latitude mesopause for the nocturnal conditions

A model of the ozone concentration variations in the mesopause for the nighttime has been created on the basis of the empirical model of the variations of the hydroxyl, atomic sodium and oxygen emissions. The measured altitude temperature profiles obtained according to the long-term measurements wer...

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Bibliographic Details
Published in:Physics and chemistry of the earth. Parts A/B/C 2002-01, Vol.27 (6), p.535-542
Main Authors: Shefov, N.N, Semenov, A.I
Format: Article
Language:English
Subjects:
Hydroxyl and sodium emissions
Long-term trend
Ozone
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Summary:A model of the ozone concentration variations in the mesopause for the nighttime has been created on the basis of the empirical model of the variations of the hydroxyl, atomic sodium and oxygen emissions. The measured altitude temperature profiles obtained according to the long-term measurements were used. Analytical approximations are presented. The estimations of the branching ratios of the excitation reactions of the NaO(A 2 Σ +) and Na( 2 P) have been made on the basis of comparison of the long-term variation data of the OH and Na emissions. Long-term decrease of the ozone content in the mesopause is one of the reasons of the long-term cooling of this atmospheric region.
ISSN:1474-7065
1873-5193
DOI:10.1016/S1474-7065(02)00035-9