Coherent structures in the Es layer and neutral middle atmosphere

• We study coherent oscillations between Es and neutral wind and temperature data.
• Permanent wave-like activity is present in all analyzed data sets.
• Persistent coherent modes over a broad range of heights correspond to PW eigen modes.
• Modulation of diurnal Es signal at periods 5–16 days was detected.

The present paper shows results from the summer campaign performed during geomagnetically quiet period from June 1 to August 31, 2009. Within time-series of stratospheric and mesospheric temperatures at pressure levels 10–0.1 hPa, mesospheric winds measured in Collm, Germany, and the sporadic E-layer parameters foEs and hEs measured at the Pruhonice station we detected specific coherent wave-bursts in planetary wave domain. Permanent wave-like activity is observed in all analyzed data sets. However, the number of wave-like structures persistent in large range of height from the stratosphere to lower ionosphere is limited. The only coherent modes that are detected on consequent levels of the atmosphere are those corresponding to eigenmodes of planetary waves.