The small-scale structure of VHF mesospheric summer echo layers observed at mid-latitudes

The small-scale structure of VHF mesospheric summer echo layers observed at mid-latitudes

The VHF radar system at Aberystwyth (52:4 N, 4:1 E) has been used to make high-timeresolution, multi-beam observations of mesospheric summer echo layers. These show that the altitude and the sense of vertical movement of the layers can vary over time-scales of minutes and horizontal scales of kilometres. In general, the altitude pro®les of signal-tonoise ratio provide evidence of a bifurcated s...

The structure of convective rain cells at mid-latitudes

Rain cells are structures which represent an important component of convective precipitation and a study of their properties represents a necessary step both towards improved stochastic models of small-scale precipitation and for the verification of deterministic high resolution local-area models. The case of intense convective precipitation in the tropics has been analysed in a recent study (v...

An Unusual Mesospheric Bore Event Observed at High Latitudes over Antarctica

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...

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...