Tidal spectrum analysis of electron density and plasma vertical velocity at mid-latitudes

Longitudinal structure in electron density at mid-latitudes: upward-propagating tidal effects

This work studies the upward-propagating migrating and non-migrating tidal effects from the lower atmosphere on the longitudinal variation of electron density ( Ne) in both the E and F regions at mid-latitudes during the 2002 March equinox. A total of 12 runs are conducted using the Thermosphere Ionosphere Electrodynamic General Circulation model for theoretical investigation. The Ne at altitud...

Velocity Spectrum for Hi at High Latitudes

In this paper we present the results of the statistical analysis of high-latitude Hi turbulence in the Milky Way. We have observed Hi in the 21 cm line, obtained with the Arecibo L-Band Feed Array (ALFA) receiver at the Arecibo radio telescope. For recovering of velocity statistics we have used the Velocity Coordinate Spectrum (VCS) technique. In our analysis we have used direct fitting of the ...

Convective gravity waves at mid-latitudes

Wind-profiler observations of gravity waves produced by convection at mid-latitudes Y. G. Choi, S. C. Lee, A. J. McDonald, and D. A. Hooper Geophysical Prospecting Laboratory, Seoul National University, Korea Department of Physics, Kangnung National University, Korea Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Rutherford Appleton La...

Summertime ozone at northern mid-latitudes

Study of the tidal variations in mesospheric temperature at low and mid latitudes from WINDII and potassium lidar observations

Zonal mean daytime temperatures from the Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite (UARS) and nightly temperatures from a potassium (K) lidar are employed in the study of the tidal variations in mesospheric temperature at low and mid latitudes in the Northern Hemisphere. The analysis is applied to observations at 89 km height for winter solstice, December t...