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Short-Period Mesospheric Gravity Waves and Diurnal Tidal Interactions at a Critical Layer

Document Type


Journal/Book Title/Conference

2007 Joint Assembly


Acapulco, Mexico

Publication Date



The US Maui-MALT program is designed to investigate the properties and dynamics of the low-latitude mesosphere and lower thermosphere region (MLT) in exceptional detail. On June 29, 2003, the University of Illinois Meteor Wind Radar (MWR) at Kihei, Maui (20.8N, 156.4W) observed a diurnal tidal wave with an amplitude twice as large as normal at mesospheric height (80-100 km) for 7 hours (14:00-21:00 UT). At the same time, the Utah State University Mesospheric Temperature Mapper (MTM) measured OH and O2 band emission intensities and temperatures at nearby Haleakala Crater, Maui (20.8 N, 156.2W). The MTM observed a short-period gravity wave (GW) event propagating through this region for most of the night from 600 to 1500 UT. The GWs disappeared from the O2 band data (peak altitude: ~94 km) and the OH band data (~87 km) around 14:00 UT and 14:30 UT, respectively.

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