SA31D-2367
Observations of Poynting fluxes, ion temperatures and neutral densities during the March 2015 magnetic storm
Wednesday, 16 December 2015
Poster Hall (Moscone South)
Yi-Jiun Su1, Yanshi Huang2, Cheryl Y Huang1, Marc R Hairston3 and Eric K Sutton4, (1)Air Force Research Laboratory Albuquerque, Albuquerque, NM, United States, (2)University of New Mexico, Albuquerque, NM, United States, (3)University of Texas at Dallas, Richardson, TX, United States, (4)Kirtland Air Force Base, Kirtland AFB, NM, United States
Abstract:
We will present various observations regarding the geomagnetic energy input and the response of Ionosphere-Thermosphere (IT) system during the March 17, 2015 storm, the largest one in solar cycle 24. The Poynting fluxes measured by Defense Meteorological Satellite Program (DMSP) satellites (F16, F17 and F18) show significant enhancements in the auroral oval and at high latitudes poleward of the auroral oval. Moreover, the ion temperatures observed by DMSP satellites (F16, F17 and F19) at magnetic latitudes greater than 80° are higher than those in the auroral oval, and the their averaged increases are 316K in the northern hemisphere and 248 K in the southern hemisphere, respectively. In addition, the neutral density residuals measured by the Gravity Recovery and Climate Experiment (GRACE) satellite indicate the largest values at the highest orbital latitudes. The wave-like perturbations originating at high latitudes move equatorward with decreasing amplitudes along GRACE orbits, implying a source region for Traveling Atmospheric Disturbances (TADs) at polar latitudes.
