Temperatures and tides in the high latitude mesopause region as observed in the OH night airglow emissions |
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Affiliation: | 1. Department of Oral Biology, Faculty of Medicine and Health, University of Leeds, Wellcome Trust Brenner Building, St James'' University Hospital, Leeds LS9 7TF, United Kingdom;2. Southern Lights Biomaterials, Marton 4710, New Zealand;3. Textile Technology Research Group, School of Design, University of Leeds, Leeds LS2 9JT, United Kingdom |
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Abstract: | The OH (6-2) band night airglow emissions have been observed from two sites at 60 and 70°N, respectively, in Norway during the December–April periods 1985–1986 and 1986–1987. Variations in rotational temperatures at ~90 km on time scales from tens of minutes to days show similar patterns as at 80°N. The semi-diurnal tide is dominant with average peak to peak amplitudes of ~5 K over the observing periods. There is a negligible difference in average tidal amplitude at 60 and 70°N. The phase of the tide is changing slowly through the December–February period. The mid-winter to early spring average temperatures are ~10 K higher than predicted by the CIRA 1972 90 km model atmosphere for the respective sites. |
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