Nitric oxide distributions in the Antarctic winter‑time middle atmosphere: Energetic electron production versus horizontal transport during geomagnetic storms

David Andrew Newnham1, Craig J Rodger2, Daniel Robert Marsh3, Mark Eugene Hervig4 and Mark A. Clilverd1, (1)British Antarctic Survey, Cambridge, United Kingdom, (2)University of Otago, Department of Physics, Dunedin, New Zealand, (3)National Center for Atmospheric Research, Boulder, CO, United States, (4)GATS Inc., Driggs, ID, United States