Spring stratospheric circulation transition and mid-latitude sporadic E-layer

Abstract

Using ionospheric data from a 32-year period for 8 mid-latitude stations within the European part of Russia, the dependence of intensity of an sporadic-E layer during the summer period on the start date of the spring seasonal transition of zonal circulation in the stratosphere was investigated. In those years with an early circulation transition, the sporadic-E layer intensity was increased by a factor of 1.5 compared with years with a late circulation transition. © 1997 COSPAR. Published by Elsevier Science Ltd