Articles | Volume 27, issue 6
Ann. Geophys., 27, 2475–2482, 2009
https://doi.org/10.5194/angeo-27-2475-2009

Special issue: 12th International Symposium on Equatorial Aeronomy...

Ann. Geophys., 27, 2475–2482, 2009
https://doi.org/10.5194/angeo-27-2475-2009

  19 Jun 2009

19 Jun 2009

E- and F-region coupling between an intense sporadic E layer and a mesoscale traveling ionospheric disturbance

W. E. Swartz1, M. C. Kelley1, and N. Aponte2 W. E. Swartz et al.
  • 1School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, 14853, USA
  • 2Arecibo Observatory, Arecibo, 00612, Puerto Rico

Abstract. Considerable controversy exists concerning the relative roles of the E- and F-regions in controlling irregularity formation in the mid-latitude ionosphere, largely because electric fields due to a plasma instability in one region may map to the other if the perpendicular scales are sufficiently large. In this paper we look at a particularly fortuitous data set in which both E- and F-region observations were made using incoherent scatter radar, GPS, lidar, and coherent scatter radar. In this event, a dense, patchy sporadic E layer was detected that exhibited type I (two-stream) coherent echoes while, at the same time, the F-layer plasma was highly structured with plasma drifts of hundreds of m/s. We examine this event in the context of a mesoscale traveling ionospheric disturbance. The data presentation will be followed by comparison with current theories for coupling between these two regions.