Is There a Compositional Signature That Could Explain Middle Latitude Ionospheric Signatures during Sudden Stratospheric Warmings?

Alan Geoffrey Burns, National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, Liying Qian, University Corporation for Atmospheric Research, Boulder, CO, United States, Wenbin Wang, High Altitude Observatory, Boulder, CO, United States, Larisa P Goncharenko, MIT Haystack Observatory, Westford, United States and Stanley C Solomon, NCAR, HAO, Boulder, CO, United States