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An Investigation of the Occurrence of Mesospheric Bores Over Bear Lake Observatory, Utah (41.6° N)

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All-sky measurements of mesospheric gravity waves in the near infrared OH, O2(0,1) and the visible Ol(557.7 nm) nightglow emissions have been made from Bear Lake Observatory (BLO), Utah (41.6° N, 111.6°W). The image data were obtained over a 2-year period (2002-2003) and have been used to investigate the occurrence and properties of undular mesospheric bore events. An unexpectedly large number of mesospheric bores (about 130 events) were detected during this period. The characteristics of these events, retrieved from the image data from BLO, are presented together with comparison of recent low-latitude results.


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