Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1369g&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, July 1991, p. 1369-1372. Research supported by NSF and NCAR.
Physics
15
Airglow, Aloha System, Atmospheric Composition, Atmospheric Tides, Optical Radar, Radar Measurement, Airborne Equipment, Emission Spectra, Mesopause, Oxygen, Sodium
Scientific paper
Sporadic Na, 'Na(s)' layers were observed by the airborne lidar during ALOHA-90 on March 22, 25 and 27 flight missions. Perturbations in the O2 and OH nighttime airglow emission intensities and temperatures were also observed by instruments on the aircraft and at Haleakala Crater (20.8 deg N, 156.2 deg W) during these events. The most striking correlation between the airglow and lidar measurements occurred during the northbound flight leg of the March 25 mission. When the Na(s) layer formed at 90.7 km, while the Electra aircraft was between 750 and 500 km south of Haleakala, the O2 temperatures near 95 km above the Electra and Haleakala increased by approximately 45 K. The data for this night suggest a connection between Na(s) and a large-scale wave, and suggest that the wave is tidal in nature. The data also suggest that some Na(s) layers can form very quickly over large geographic areas. Fast chemical processes are required to generate the large amounts of atomic Na involved in some of these events.
Gardner Chester S.
Hecht James H.
Kane Timothy J.
Walterscheid Richard L.
Yee Jae Hyung
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