Skip to Main content Skip to Navigation
Journal articles

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

Abstract : The VHF radar system at Aberystwyth (52.4° N, 4.1°E) has been used to make high-time-resolution, 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 profiles of signal-to-noise ratio provide evidence of a bifurcated structure with sharp changes in the horizontal wind vector and vertical velocity, and enhanced spectral width occurring at the bifurcation level. The implications of the small-scale structure for studies of the aspect sensitivity of radar returns are discussed, and the changes in wind-field at the bifurcation level are compared with 'wind corners' observed in rocket studies of the mesosphere at polar latitudes.
Complete list of metadatas

Cited literature [55 references]  Display  Hide  Download
Contributor : Publication Egu <>
Submitted on : Wednesday, January 1, 1997 - 8:00:00 AM
Last modification on : Wednesday, September 3, 2008 - 9:43:39 AM
Long-term archiving on: : Friday, November 18, 2016 - 9:44:06 PM


Explicit agreement for this submission


  • HAL Id : hal-00316308, version 1




D. A. Hooper, L. Thomas. The small-scale structure of VHF mesospheric summer echo layers observed at mid-latitudes. Annales Geophysicae, European Geosciences Union, 1997, 15 (8), pp.1037-1047. ⟨hal-00316308⟩



Record views


Files downloads