The influence of the mesoscale turbulence in lower thermosphere-upper mesosphere on the mid-latitude sporadic E-layer

Abstract

In this paper we discuss the influence of mesoscale turbulence in lower thermosphere, measured by radiometeor method, on the characteristics of Es layers, as observed by ionospheric sounding. Mesoscale turbulence has a considerable influence on the average daily values and inter-daily variations of the blanketing frequency fbEs, critical frequency foEs and semi-transparency δfbEs of the Es layer. More intense, probably semi-transparent, Es layers occur during periods of less developed mesoscale turbulence, while weak blanketing Es layers occur when values of turbulence in the lower thermosphere are increased, both in daytime and night-time, for all seasons. © 1997 COSPAR. Published by Elsevier Science Ltd.