Solar disturbances and their geospace impacts

Details Solar disturbances and their geospace impacts Solar disturbances and their geospace impacts

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm33c..02b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM33C-02

Physics

2700 Magnetospheric Physics (6939), 2774 Radiation Belts, 2778 Ring Current, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Coronal mass ejections (CMEs) and other impulsive solar disturbances are observed to have significant effects in near-Earth space. Fast CMEs often have strong interplanetary shock waves ahead of magnetic cloud structures. It is important from a Sun-Earth connections standpoint to understand magnetospheric and atmospheric responses to impulsive solar wind changes. Recent CME-driven events have been observed by SOHO sensors and they have subsequently produced intense geomagnetic storms at Earth. The events in late- October and November 2003, for example, were seen by ACE sensors to be co-mingled with solar wind streams. The result was very pronounced substorm events, intense relativistic electron enhancements, and massive buildups of nitric oxide (NO) in the upper atmosphere. Multispacecraft data give a good measure of the many effects in the magnetosphere and the atmosphere. Production of NO, as one illustration, is compared with the spatial extent and time variability of energetic particle inputs to the atmosphere. The combination of available space platforms allows disturbances from the Sun to be traced to the atmosphere and to assess quantitatively the energy transport throughout the Sun-Earth system during major events.

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