HR: 12:05h
AN: SM32A-08    [Abstracts]
TI: Magnetospheric Energy Coupling During CIR-Driven Storms
AU: * Turner, N E
EM: neturner@fit.edu
AF: Physics and Space Sciences Florida Institute of Technology, 150 W Univ. Blvd, Melbourne, FL 32901,
AU: Cramer, W D
EM: wcramer@fit.edu
AF: Physics and Space Sciences Florida Institute of Technology, 150 W Univ. Blvd, Melbourne, FL 32901,
AU: Laughlin, L
EM: llaughl@clemson.edu
AF: Clemson University, Physics Dept., Clemson, SC 29634,
AU: Mitchell, E J
EM: mitchele@fit.edu
AF: AU: Emery, B
EM: emery@hao.ucar.edu
AF: UCAR, HAO, Boulder, CO 80307,
AU: Knipp, D
EM: delores.knipp@usafa.af .mil
AF: US Air Force Academy, Physics Dept., USAFA, CO 80840,
AB: Magnetic storms due to Corotating Interaction Regions (CIRs) have been shown to elicit different responses in the magnetosphere than those prompted by other types of solar wind conditions. In particular, recent work has shown that magnetic storms driven by CIRs deposit more energy in the ionosphere and ring current than would be expected from the electromagnetic energy input from the CIR. They appear to be more geoefficient, in the sense that the ratio of the measured energy deposited (ring current, Joule heating, and auroral precipitation) to energy input is greater than that for Coronal Mass Ejections (CMEs). In this study, we investigate this enhanced geoefficiency and also its source. We will present analysis of the differences in the solar wind during CIRs (e.g., Bz variation, solar wind speed, Mach numbers, etc.) and their possible influence on energy coupling and magnetospheric energy deposition.
DE: 2778 Ring current
DE: 2784 Solar wind/magnetosphere interactions
DE: 7954 Magnetic storms (2788)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting