scholarly journals A high-latitude 8-hour wave in the mesosphere and lower thermosphere

2005 ◽  
Vol 110 (A9) ◽  
Author(s):  
Q. Wu ◽  
N. J. Mitchell ◽  
T. L. Killeen ◽  
S. C. Solomon ◽  
P. T. Younger
Keyword(s):  
High Latitude ◽  
Lower Thermosphere ◽  
Mesosphere And Lower Thermosphere

High-latitude tidal behavior in the mesosphere and lower thermosphere

1989 ◽  
Vol 51 (7-8) ◽  
pp. 595-608 ◽  
Author(s):  
S.K. Avery ◽  
R.A. Vincent ◽  
A. Phillips ◽  
A.H. Manson ◽  
G.J. Fraser
Keyword(s):  
High Latitude ◽  
Lower Thermosphere ◽  
Mesosphere And Lower Thermosphere

scholarly journals Large-Scale Waves in the Mesosphere and Lower Thermosphere Observed by SABER

2005 ◽  
Vol 62 (12) ◽  
pp. 4384-4399 ◽  
Author(s):  
Rolando R. Garcia ◽  
Ruth Lieberman ◽  
James M. Russell ◽  
Martin G. Mlynczak
Keyword(s):  
Large Scale ◽  
Middle Atmosphere ◽  
Lower Thermosphere ◽  
Normal Modes ◽  
Zonal Winds ◽  
Broadband Emission ◽  
Summer Hemisphere ◽  
Mean Structure ◽  
Mesosphere And Lower Thermosphere ◽  
The Tropics

Abstract Observations made by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on board NASA’s Thermosphere–Ionosphere–Mesosphere Energetics and Dynamics (TIMED) satellite have been processed using Salby’s fast Fourier synoptic mapping (FFSM) algorithm. The mapped data provide a first synoptic look at the mean structure and traveling waves of the mesosphere and lower thermosphere (MLT) since the launch of the TIMED satellite in December 2001. The results show the presence of various wave modes in the MLT, which reach largest amplitude above the mesopause and include Kelvin and Rossby–gravity waves, eastward-propagating diurnal oscillations (“non-sun-synchronous tides”), and a set of quasi-normal modes associated with the so-called 2-day wave. The latter exhibits marked seasonal variability, attaining large amplitudes during the solstices and all but disappearing at the equinoxes. SABER data also show a strong quasi-stationary Rossby wave signal throughout the middle atmosphere of the winter hemisphere; the signal extends into the Tropics and even into the summer hemisphere in the MLT, suggesting ducting by westerly background zonal winds. At certain times of the year, the 5-day Rossby normal mode and the 4-day wave associated with instability of the polar night jet are also prominent in SABER data.

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