Computer Science – Sound
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3604807l&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 4, CiteID L04807
Computer Science
Sound
8
Atmospheric Processes: Mesospheric Dynamics, Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Atmospheric Processes: Tides And Planetary Waves
Scientific paper
An anomalous behavior of the two-day wave is observed during the 2006 Austral Summer in the mesospheric temperature and line-of-sight wind, retrieved from the Microwave Limb Sounder (MLS) aboard NASA's Earth Observing System (EOS) Aura mission. During January 2006, the wave appears to exist in an unusually strong summer easterly jet, and its spectral signature spreads over a broader range of zonal wavenumber and frequency. In addition to the typical wavenumber 3 component, a wavenumber 2 disturbance with a near 2-day period is also evident, traveling westward at similar phase speed. The wavenumber 3 component exhibits the previously observed dual characteristics of both a normal and an instability mode, while the wavenumber 2 feature appears to be an instability mode, in agreement with recent theoretical calculations.
Limpasuvan Varavut
Wu Dong L.
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