Modeling the Space Weather Impacts of CR2060 and CR2068

Details Modeling the Space Weather Impacts of CR2060 and CR2068 Modeling the Space Weather Impacts of CR2060 and CR2068

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm24b..07w&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM24B-07

Physics

[2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [7924] Space Weather / Forecasting, [7954] Space Weather / Magnetic Storms, [7959] Space Weather / Models

Scientific paper

Corotating Interaction Regions (CIRs) are the often-neglected driver of space weather impacts when compared against the more highly hyped Coronal Mass Ejection (CME). The most recent solar minimum has brought renewed attention to the space weather impacts of CIRs. In this presentation we use simulations from the Coupled Magnetosphere Ionosphere Thermosphere (CMIT) model for two Carrington Rotations, namely CR2060 and CR2068, to investigate the importance of various features in the solar wind including density enhancements, IMF BZ southward, and the high solar wind velocity that follows the CIR. Each of these rotations includes at least two CIR and high speed stream intervals. The streams have differing velocities and IMF BZ profiles providing an opportunity for testing the drivers as well as the simulation results because of the availability of observational data. Another key part of this investigation on importance of the various drivers is contrasting the results of simulations driven by L1 solar wind observations with those produced by simulations driven by heliospheric simulations for each Carrington Rotation. Since impacts of space weather depend on the region of interest in addition to computing deriving indices, e.g. AE and Dst, we compare global measures, e.g. cross polar potential, hemispheric power, as well as investigating macroscale response in the thermosphere, ionosphere, and magnetosphere.

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