Fabry-Perot imaging observations of OH(8-3) - Rotational temperatures and gravity waves

Details Fabry-Perot imaging observations of OH(8-3) - Rotational temperatures and gravity waves Fabry-Perot imaging observations of OH(8-3) - Rotational temperatures and gravity waves

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9512251s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 1, 1990, p. 12251-12263. Research supported by the Lockheed Inde

Computer Science

Sound

22

Fabry-Perot Interferometers, Gravity Waves, Hydroxyl Emission, Thermosphere, Wave Propagation, Atmospheric Attenuation, Energy Distribution, Rotational Spectra, Sound Waves, Spatial Distribution, Thermal Emission

Scientific paper

Ground-based observations of lower-thermospheric emission originating from OH(8-3) rotation lines P(1,2) at 7316.4 A and P(2,3) at 7330 A were made with an intensified imaging Fabry-Perot interferometer from Santa Cruz, CA, on September 25 and 26, 1987, during a CEDAR campaign. The rotational lines were imaged simultaneously from four different atmospheric volume elements which were separated by about 15 km north to south and about 30 km east to west. Two types of analysis are performed on the data. First, traditionally observed temporal structure in the rotational temperature showed acoustic gravity-wave-like periods which are compared to other experimental data. Spectral analysis on the data shows the traditional gravity-wave characteristics for specific periods in four separated atmospheric volumes which were sampled simultaneously. Second, spectral components of temperature variation exhibited phase coherence in all four spatial regions, indicating wave phenomena of length scales much greater than 30 km.

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