IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
The role of Interplanetary Coronal Mass Ejections in Space Weather
Autor/es:
DASSO, S.; MASÍAS-MEZA, J.J.; JANVIER, M.; DEMOULIN, P.
Reunión:
Conferencia; X Latin American Conference on Space GeoPhysics (X COLAGE); 2014
Resumen:
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Interplanetary Coronal
Mass Ejections (ICMEs) are meso-scale transient objects in the
heliosphere, ejected by the Sun from the destabilisation of a portion
of coronal magnetic field. The changes in the plasma conditions
leaded by an ICME near Earth, typically generate strong variations of
the input of energy, momentum, and particles, from the interplanetary
medium to the terrestrial environment. Faster ICMEs generally drive
Interplanetary shocks, which affect the transport of solar energetic
particles in the heliosphere and can produce acceleration of
particles producing new energetic particles with effects on Space
Weather. Then, the presence of ICMEs is typically associated with a
transient variation of energetic particles fluxes impacting Earth
(Solar Energetic Particles, Forbush decreases, etc.). All these
combined effects imply that ICMEs can significantly enhance the
Sun-Earth coupling. The study of ICMEs has
greatly advanced in the last few years, thanks to multi-spacecraft
observations of the solar corona and the solar wind, combined with
high performance numerical modeling. The comparisons between models
and recent observations now answer several open questions, such as
the typical configuration (internal and global) of ICMEs, as well as
how they are affected due to their interaction with the ambient solar
wind during their propagation in the interplanetary medium. Recent advances in the
field of ICMEs will be provided in this talk, including their effects
on Space Weather and the level of Sun-Earth coupling.