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Full-Text Articles in Physical Sciences and Mathematics
On The Nature Of Short-Period Mesospheric Gravity Wave Propagation Over Halley, Antarctica, K. Nielsen, Michael J. Taylor, R. E. Hibbins, M. J. Jarvis, J. M. Russell
On The Nature Of Short-Period Mesospheric Gravity Wave Propagation Over Halley, Antarctica, K. Nielsen, Michael J. Taylor, R. E. Hibbins, M. J. Jarvis, J. M. Russell
All Physics Faculty Publications
As part of a collaborative program between British Antarctic Survey and Utah State University, measurements were made using an all-sky airglow imager located at the U.K. Halley Station (76°S, 27°W) during the 2000 and 2001 austral winter seasons from April through to early September. A co-located imaging Doppler interferometer was utilized to obtain coincident wind measurements for a total of 171 wave events. This study comprises the first detailed climatological investigation of the propagation nature (freely propagating, Doppler ducted, or evanescent) of individual quasi-monochromatic, short-period wave events at a high southern latitude. Distributions of the derived vertical wavelength exhibit an …
An Unusual Mesospheric Bore Event Observed At High Latitudes Over Antarctica, K. Nielsen, Michael J. Taylor, R G. Stockwell, M. J. Jarvis
An Unusual Mesospheric Bore Event Observed At High Latitudes Over Antarctica, K. Nielsen, Michael J. Taylor, R G. Stockwell, M. J. Jarvis
All Physics Faculty Publications
All-sky CCD observations of short-period mesospheric gravity waves have been made from Halley Station, Antarctica (76S, 27W). 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 …