Now showing items 71-80 of 80
Ionospheric storm effects in the nighttime E region caused by neutralized ring current particles
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-03)
During magnetic storms an anomalous increase in the ionization density of the nighttime E region is observed at low and middle latitudes. It has been suggested that this effect is caused by the precipitation of neutralized ...
Laser scatter measurements in the mesosphere and above
(Elsevier, 1969-01)
Recent papers by Sandford are discussed in relation to results from an improved optical radar which was in use during the period January-February 1967.
A comparison between mesospheric wind measurements made near Christchurch (44°S, 173°E) using the high resolution doppler imager (HRDI) and a medium frequency (MF) radar
(Springer-Verlag; EGS – Springer-Verlag, 2000-05)
We report on the comparison of winds measured by a medium frequency (MF) radar near Christchurch, New Zealand, and by the high resolution doppler imager (HRDI). Previous comparisons have demonstrated that there can be ...
Introduction to subduction zones
(Birkhäuser-Verlag; Birkhäuser Verlag ; Springer Science+Business Media, 1989-03)
Cutoff conditions for transverse circularly polarized electromagnetic waves in a finite temperature electro-magneto-ionic medium
(Elsevier, 1967-10)
The dispersion relation for wave propagation in a homogeneous, electrically neutral electron gas subject to crossed static electric and magnetic fields is derived using the coupled Maxwell-Boltzmann-Vlasov equations. The ...
Simultaneous optical observations of long-period gravity waves during AIDA '89
(Elsevier, 1993-03)
Ground-based optical instrumentation supported the AIDA '89 wind measurement comparisons by describing the gravity waves affecting the 80-100 km altitude region during clear dark hours over Puerto Rico. This study tabulates ...
Observations of neutral winds in the polar cap during northward IMF
(Elsevier, 1994-02)
Long term remote observations of neutral winds at F-region altitudes have been performed at Thule Air Base (lat. 76.5[deg]N, long. 69.0[deg]W), Greenland, and Sondre Stromfjord (lat. 67.0[deg]N, long. 50.9[deg]W), Greenland. ...
Accurate determination of surface normal stress in viscous flow from a consistent boundary flux method
(Elsevier, 1993-06)
Accurate determination of surface normal stresses from numerical modeling of mantle convection is crucial in determining surface topography, geoid and gravity anomalies. With the finite element method, we have developed a ...
Evidence for a shear velocity discontinuity in the lower mantle beneath India and the Indian Ocean
(Elsevier, 1987-11)
SH and sSH seismograms are modeled to determine the shear velocity structure in the D" region beneath India and the Indian Ocean. The signals show waveform complexities similar to those observed in data sampling the D" ...
On the maintenance of the axisymmetric part of the flow in the atmosphere
(Birkhäuser-Verlag; Springer Science+Business Media, 1972-12)
The maintenance of the axisymmetric component of the flow in the atmosphere is investigated by means of a steady-state, quasi-geostrophic formulation of the meteorological equations. It is shown that the meridional variations ...