Simultaneous intensity, temperature and imaging measurements of short period wave structure in the OH nightglow emission

Details Simultaneous intensity, temperature and imaging measurements of short period wave structure in the OH nightglow emission Simultaneous intensity, temperature and imaging measurements of short period wave structure in the OH nightglow emission

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1171t&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, Aug. 1991, p. 1171-1188. Research supported by SERC, Utah State Universit

Physics

30

Gravity Waves, Hydroxyl Emission, Michelson Interferometers, Near Infrared Radiation, Nightglow, Upper Atmosphere, Rotational Spectra, Spectral Bands, Television Cameras

Scientific paper

A low light TV camera coaligned with a narrow field Michelson interferometer have been used to investigate how variations in the intensity and temperature of the near-infrared hydroxyl nightglow emission are related to the passage of short-period mesospheric gravity waves. The observations were made from Sacramento Peak, NM (32.8 deg N, 105.8 deg W) on the night of June 14/15, 1983, during a spectacular nightglow display that also exhibited wave structure visible to the dark adapted eye. A coherent wavelike pattern of horizontal wavelength 23 + or - 1 km moving uniformly with a velocity of 28 + or - 2 m/s (apparent period 13.7 + or - 1.2 min), was measured at several azimuths over an interval of 2.5 h. The induced intensity and temperature perturbations were wave-like in nature and exhibited a higher degree of correlation. The intensity variations were large, up to 30 percent, yet the brightest wave forms were not more than 10 K hotter than the adjacent dark forms. The amplitude of the intensity fluctuation was found to be about 8 times larger than the temperature variation. In all cases, the intensity wave led the thermal wave, but only by a small amount.

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