Geospace Climatology: A Window to the Heliosphere Through Polar Regions

Details Geospace Climatology: A Window to the Heliosphere Through Polar Regions Geospace Climatology: A Window to the Heliosphere Through Polar Regions

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm33d..05p&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM33D-05

Physics

2134 Interplanetary Magnetic Fields, 2475 Polar Cap Ionosphere, 2730 Magnetosphere: Inner, 6929 Ionospheric Physics (1240, 2400)

Scientific paper

A multitude of ground-based instruments and satellite missions allow us to study near-Earth's space (geospace) globally and even instantaneously. We can determine the magnetosphere-ionosphere coupling in both the sunlit and dark polar caps studying ionospheric responses on varying solar wind input from the time scales of minutes to solar activity cycles. However, geospace data are very sparse; therefore, we can address the ``geospace climatology'' only through a series of empirical ionospheric electrodynamics models (i.e., models for ground geomagnetic variations, ionospheric currents/convection, field-aligned currents, auroral emissions) constructed separately for the northern and southern polar regions and constrained to quiet and/or moderately disturbed conditions. Parameterization of these models by the SW/IMF strength and `clock angle' direction and by the Earth's dipole tilt would help filling gaps in actual synoptic observations collected through geospace, producing data-driven ``ionospheric windows'' to the Heliosphere for geospace climatology studies. As we expand our studies from the Earth to other planets, the proposed approach may help in constraining physics-based (e.g., MHD) models of the SW/IMF propagation through the solar system. The current status and progress of empirical modeling of the geospace (ionospheric and magnetospheric) electrodynamics through a solar activity cycle will be reviewed in conjunction with various international initiatives: IHY, CAWSES, ICESTAR, IPY, and eGY.

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