The role of magnetic equator in the Ne perturbations induced by IGW tsunami- related

Details The role of magnetic equator in the Ne perturbations induced by IGW tsunami- related The role of magnetic equator in the Ne perturbations induced by IGW tsunami- related

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa33a0266k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA33A-0266

Computer Science

Sound

0560 Numerical Solutions (4255), 2427 Ionosphere/Atmosphere Interactions (0335), 2447 Modeling And Forecasting, 2471 Plasma Waves And Instabilities (2772), 4564 Tsunamis And Storm Surges

Scientific paper

Internal-gravity waves (IGWs) produced during the tsunami's propagation are known to produce identifiable signature in the overlying ionosphere. Notwithstanding several observations and one case of successful modellings, an heterogenic directivity in the ionospheric IGW propagation has been put in evidence recently using total electron content (TEC) measured by GPS receivers. To explicit the link between the anomalous propagation observed by ionospheric sounding, and the IGW propagation in the neutral atmosphere, we explore the role of magnetic field in the neutral-plasma coupling. A 3D numerical solution of closed set of non-linear hydro-magnetic equations in physical and chemical realistic hypothesis, is used, here, to reproduce the complete response of ionosphere to neutral motion. Vertical and horizontal scale of the modelled perturbed ionosphere corroborates the total electron content (TEC) observations and confirms the effective role of magnetic field in the ionospheric signature of tsunamis.

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