TY - JOUR
T1 - Tidal variability of the geomagnetic polar cap mesopause above Resolute Bay
AU - Fisher, Genene M.
AU - Killeen, Timothy L.
AU - Wu, Qian
AU - Hays, Paul B.
AU - Reeves, J. M.
PY - 1999/3/1
Y1 - 1999/3/1
N2 - Variability in the geomagnetic polar cap neutral wind near the mesopause above Resolute Bay, Canada (74.9°N, 94.9°W) has been observed by a Fabry-Perot Interferometer, using a circle-to-line detection technique (FPI/CLIO) to observe the OH Meinel emission. We present an analysis of the first wind measurements obtained with the FPI/CLIO from December 1995 to March 1996. The OH(7,3) (892.0 nm) Doppler winds were analyzed for tidal oscillations (defined herein as oscillations with periods which are sub-harmonics of a solar day). Daily spectral analysis, using 50 relatively clear days showed that oscillations between, and including, 12 h and 8 h were frequent throughout the winter season in both the meridional and the zonal winds. A non-linear least squares fit, performed on the data from the Jan 22-30 interval, revealed that a 12 h tidal feature was dominant. Observations of the OH neutral winds show variations indicating strong tidal wave activity at the mesopause.
AB - Variability in the geomagnetic polar cap neutral wind near the mesopause above Resolute Bay, Canada (74.9°N, 94.9°W) has been observed by a Fabry-Perot Interferometer, using a circle-to-line detection technique (FPI/CLIO) to observe the OH Meinel emission. We present an analysis of the first wind measurements obtained with the FPI/CLIO from December 1995 to March 1996. The OH(7,3) (892.0 nm) Doppler winds were analyzed for tidal oscillations (defined herein as oscillations with periods which are sub-harmonics of a solar day). Daily spectral analysis, using 50 relatively clear days showed that oscillations between, and including, 12 h and 8 h were frequent throughout the winter season in both the meridional and the zonal winds. A non-linear least squares fit, performed on the data from the Jan 22-30 interval, revealed that a 12 h tidal feature was dominant. Observations of the OH neutral winds show variations indicating strong tidal wave activity at the mesopause.
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U2 - 10.1029/1999GL900046
DO - 10.1029/1999GL900046
M3 - Article
AN - SCOPUS:0033105519
SN - 0094-8276
VL - 26
SP - 573
EP - 576
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 5
ER -