SH31A-4107:
Long-Term Interplanetary Magnetic Field Variations at 1 AU Observed by Wind and STEREO
Wednesday, 17 December 2014
Adam Szabo and Andriy Koval, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Abstract:
Recently McComas et al [2013] has reported a significant reduction in the interplanetary magnetic field strength and radial component at 1 AU during the current weak solar cycle. Twenty years of Wind magnetic field observations are used to quantify these changes. ICME time periods are removed to separate the effect of the number of coronal mass ejections and the known solar cycle variation of the IMF fitted and accounted for. To identify possible heliospheric longitudinal effects, STEREO observations from the past ten years are also included. Moreover, correlations with solar wind plasma parameters are also presented.
