SM23B-2564
Investigation of Solar Wind Coupling to the High-Latitude Ionospheric Reverse Convection Electric Field during Large Positive IMF Bz
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Kshitija Deshpande1, C. Robert Clauer1,2, Zhonghua Xu1,2, Michael Hartinger1,2, Daniel R Weimer1,2 and Michael J Nicolls3, (1)Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, (2)National Institute of Aerospace, Hampton, VA, United States, (3)SRI International, Menlo Park, CA, United States
Abstract:
An empirical determination of the coupling function between the solar wind dynamo electric field and the high latitude ionospheric electric field is possible using the Weiner filter technique. We investigate the response of the high latitude reverse convection electric field measured by the Resolute Incoherent Scatter Radar (RISR) during periods of large northward IMF for two CME-related events 12-13 September 2014 and 22 - 23 June 2015. The technique provides the most general linear coupling function including frequency response and time delays. We find that the solar wind is strongly coupled to the high latitude reverse convection electric field. We discuss the details of this coupling as it relates to various parameters that may influence the coupling efficiency, such as solar wind mach number, plasma beta, ionospheric Pederson conductivity, etc.
