An unusual mesospheric bore event observed at high latitudes over Antarctica
Nielsen, K.; Taylor, M.J.; Stockwell, R.G.; Jarvis, M.J.. 2006 An unusual mesospheric bore event observed at high latitudes over Antarctica. Geophysical Research Letters, 33 (7), L07803. 4, pp. doi 10.1029/2005GL025649Full text not available from this repository.
All-sky CCD observations of short-period mesospheric gravity waves have been made from Halley Station, Antarctica (76°S, 27°W). On 27 May, 2001, an unusual wave event exhibiting several features characteristic of a “bore” was observed in the OH, Na, and O2 nightglow emissions. Mesospheric bores are rare wave events that have previously been observed at mid- and low-latitudes. This event was particular interesting as: (1) it initially appeared as a single, high contrast, linear front, accompanied by a sharp enhancement in intensity in all three emissions, (2) a number of trailing wave crests were observed to form with a measured growth rate of 6.6 waves/hr, and (3) the wave pattern exhibited unusual dynamics with significant variability in the observed phase speed and a reduction in the horizontal wavelength by ∼50% over a 1-hr period. The location of Halley and the observed propagation suggests a ducted wave consistent with current bore models.
|Identification Number/DOI:||doi 10.1029/2005GL025649|
|Programmes:||BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections|
|Additional Information:||Full text not available from this repository|
|NORA Subject Terms:||Atmospheric Sciences|
|Date made live:||22 Aug 2007 12:04|
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