Twelve-hour tides in the winter northern polar mesosphere and lower thermosphere

被引:11
作者
Fisher, GM
Niciejewski, RJ
Killeen, TL
Gault, WA
Shepherd, GG
Brown, S
Wu, Q
机构
[1] Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA
[2] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[3] York Univ, Ctr Res Earth & Space Sci, N York, ON M3J 1P3, Canada
[4] Ctr Res Earth & Space Technol, Toronto, ON M3J 3K1, Canada
关键词
semidiurnal tide; polar mesosphere; polar thermosphere; Fabry-Perot interferometer; Resolute Bay; mesopause;
D O I
10.1029/2001JA000294
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
An investigation of the tidal oscillations near the winter northern polar mesopause has been carried out at Resolute Bay, Canada (74.9degrees N, 94.9degrees W). The daily, monthly, and annual variations of the tidal field were studied using the 1995/1996 and 1996/1997 data. Ground-based measurements were obtained using a Fabry-Perot interferometer with a circle to line interferometric optical system (FPI/CLIO) and the E Region Wind Interferometer (ERWIN). The FPI/CLIO observed the Doppler winds of the OH emission near 86 km altitude. The ERWIN provided simultaneous OH (near 86 km) and OI (near 97 km) wind measurements. Monthly data were compared to the Global Scale Wave Model (GSWM) and the Forbes/Vial Solar Semidiurnal Tidal Model predictions. Analysis of the 12-hour oscillation near 86 and 97 km altitudes indicates that it is persistent and characteristic of a semidiurnal propagating tide. The semidiurnal tide was found to be highly variable in amplitude and phase from day to day. The observations presented provide a continuous and extensive data set for the winter season.
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页数:16
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