Abstract
The absolute brightness and spectral distributions of OH airglow Meinel band near infrared emissions (1.0µ–1.7µ) were obtained from a Michelson Interferometer operating at Eureka (80° 0′N, 85° 56′W), Canada, during polar night. A cross‐spectral analysis of brightness and rotational temperature data from December 1, 1993, to December 20, 1993, shows spectral features with periods near 12, 8, 6, 4, and 3 hours. The periods (tidal harmonics) and persistence (days to weeks) of these features argue for a tidal interpretation. Tidal Hough functions indicate that the dominant spectral features are most likely the manifestation of zonally symmetric tides. The tides at Eureka exhibit a high degree of transience. There is a suggestion of an oscillation with a period close to 5 hours.
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