Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm42a10t&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM42A-10
Physics
2700 Magnetospheric Physics, 2736 Magnetosphere/Ionosphere Interactions, 2753 Numerical Modeling, 2776 Polar Cap Phenomena
Scientific paper
We compare the ion field-aligned transport patterns simulated by an extended Dynamic Fluid semi-Kinetic (DyFK) model with those observed by the Thermal Ion Dynamics Experiment (TIDE) on board the POLAR satellite near 5000 km altitude over the southern hemisphere polar ionosphere. The DyFK model couples a moment-based fluid model for altitudes from 120 - 1100 km to a generalized semi-kinetic treatment for the topside through 3 RE region. Various processes, such as cleft/auroral soft electron precipitation, transverse ion heating by ion cyclotron waves and hot plasma-driven potential drops are incorporated into the generalized semi-kinetic treatment of topside ionosphere. The simulated field-aligned velocity is upward in the dayside cleft/aurora region, while it turns downward and tends to increase in magnitude across the polar cap from dayside to nightside. This pattern of the simulated flows is in good agreement with the observation. The simulated ion densities and field-aligned fluxes also follow the tendencies of those observed.
Coffey Valerie C.
Horwitz James L.
Moore Thomas Earle
Stevenson B. A.
Tu Jiachin
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