SA32A-04
Variations of Hydrogen in the Thermosphere: Nature and Causes
Wednesday, 16 December 2015: 11:15
2007 (Moscone West)
Alan Geoffrey Burns, National Center for Atmospheric Research, Boulder, CO, United States, Wenbin Wang, High Altitude Observatory, Boulder, CO, United States, Liying Qian, University Corporation for Atmospheric Research, Boulder, CO, United States, Geoffrey Crowley, Atmospheric and Space Technology Research Associates, LLC, Boulder, CO, United States and Jeffrey P Thayer, University of Colorado at Boulder, Boulder, CO, United States
Abstract:
Neutral hydrogen plays an important role in determining the state of the plasmasphere and its response to forcing from geomagnetic storms. Hydrogen’s solar cycle variation is counterintuitive: there is more hydrogen at solar minimum at 300 km that there is at solar maximum. Similarly there is more hydrogen in winter than in summer and hydrogen density maximizes in the morning. In this presentation we describe these variations and consider some possible causes for them.
