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Vertical motions in the lower ionosphere and a sporadicE-layer

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Abstract

We propose a calculation technique for the main characteristics of a sporadic E-layer, including the effective recombination coefficient, the relative content of meteor and atmospheric ions in the layer, and the time of its evolution. This technique is based on measurements of vertical plasma velocities by the method of resonance scattering of radio waves by artificial periodic inhomogeneities of the electron density. The contribution of internal gravity waves and turbulent motions to the formation of sporadic layers is estimated. The characteristic values of the turbulent velocity measured by this method at the heights of the turbopause are presented. The possible mechanisms of mid-latitude sporadic E-layer formation at heights of 90 to 120 km are considered. Experimental studies confirmed the main statements of the wind shear theory concerning the determining role of the redistribution of ionization under the action of atmospheric winds with vertical gradient of velocity in the formation of Es.

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Authors
  1. N. V. Bakhmet’eva
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  2. V. V. Belikovich
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  3. Yu. A. Ignat’ev
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  4. A. A. Ponyatov
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Additional information

Deceased.

Radiophysical Research Institute, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 42, No. 1, pp. 26–35, January, 1999.

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Bakhmet’eva, N.V., Belikovich, V.V., Ignat’ev, Y.A. et al. Vertical motions in the lower ionosphere and a sporadicE-layer. Radiophys Quantum Electron 42, 22–30 (1999). https://doi.org/10.1007/BF02677637

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  • DOI: https://doi.org/10.1007/BF02677637

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