منابع مشابه
Global distributions of diurnal and semidiurnal tides: observations from HRDI-UARS of the MLT region and comparisons with GSWM-02 (migrating, nonmigrating components)
HRDI (High Resolution Doppler InterferometerUARS) winds data have been analyzed in 4-latitude by 10-longitude cells at 96 km to obtain the global distribution of the solar-tidal amplitudes and phases. The solstices June–July (1993), December–January (1993–1994), and one equinox (September–October, 1994) are analyzed. In an earlier paper (Manson et al., 2002b) the emphasis was solely upon the lo...
متن کاملNon-migrating tides connections with topography and surface properties
Atmospheric densities derived from measured acceleration of several Mars orbiters reveal large amplitude Sun-synchronous longitudinal density variations at altitudes of about 100-160km (see Figure 1). These variations are associated with vertically-propagating nonmigrating solar thermal tides that are excited near Mars’ surface and propagate into the thermosphere. Excitation of these waves is a...
متن کاملLunar and Solar Barometric Tides in Australia
The lunar semidiurnal barometric tide Lz and the solar 2 4 , 12-, and &hr. oscillations of the surface pressure have been determined for 10 stations in Australia and on adjacent islands. At Rabaul and Moresby L2 is considerably smaller than elsewhere in these latitudes. The characteristic annual variation of the phase-late high tide during the D season-is found a t most Australian stations. But...
متن کاملRadar wind profiler observations of solar semidiurnal atmospheric tides
Semidiurnal solar tides in the mid-latitude troposphere are investigated using harmonic analysis of 404 MHz radar profiler wind data obtained from a wide longitude zone in the U.S. The tides are apparent above a 1000-m-deep surface layer and increase in amplitude with height, attaining speeds of 0.5-0.7 rn/s at 5-7 km. Observed wind characteristics agree well with tidal characteristics obtained...
متن کاملLong-term variability in the solar diurnal tide observed by HRDI and simulated by the GSWM
Observations of the mesosphere and lower thermosphere winds obtained by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS) during 1991 to 1995 reveal a semiannual variation in the amplitude of the (1,1) diurnal tide. The global-scale wave model (GSWM) represents the first numerical modeling attempt at simulating this seasonal variability, and a prelimina...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 1999
ISSN: 0148-0227
DOI: 10.1029/1998ja900125