Direct observations of nonmigrating diurnal tides in the equatorial thermosphere

Details Direct observations of nonmigrating diurnal tides in the equatorial thermosphere Direct observations of nonmigrating diurnal tides in the equatorial thermosphere

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3704803t&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 4, CiteID L04803

Physics

7

Atmospheric Processes: Tides And Planetary Waves, Atmospheric Processes: Thermospheric Dynamics (0358), Ionosphere: Equatorial Ionosphere

Scientific paper

We present direct observations of nonmigrating diurnal tides in the 90-270 km range inferred from the Upper Atmosphere Research Satellite (UARS) wind imaging interferometer (WINDII). A prominent zonal wavenumber 4 appears in daytime zonal winds, extending to 180 km. We interpret this signature as an eastward-propagating diurnal wavenumber 3 (DE3) viewed from the satellite perspective. This evidence of the extended upward propagation of DE3 demonstrates that it acts as a direct coupling agent between the troposphere and the thermosphere (and F-region), in addition to its role in the E-region dynamo.

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