Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa73a..03o&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA73A-03
Physics
2427 Ionosphere/Atmosphere Interactions (0335), 2753 Numerical Modeling, 3339 Ocean/Atmosphere Interactions (0312, 4504), 3384 Acoustic-Gravity Waves, 4564 Tsunamis And Storm Surges
Scientific paper
A series of ionospheric anomalies following the Sumatra tsunami has been recently reported in the literature (Liu et al. 2006; DasGupta et al. 2006; Occhipinti et al. 2006). These anomalies show the signature in the ionosphere of tsunami-generated internal gravity waves (IGW) propagating in the neutral atmosphere overlooking the ocean. All these anomalies, observed in the total electron content (TEC) measured by GPS or altimeters, show geographical heterogeneity in the perturbed TEC amplitude and suggest a dependence of geomagnetic latitude. This latter, never treated theoretically, have been taken into account in the 3D modeling of Occhipinti et al. (2006) and used for the interpretation of the TEC Topex and Jason data. Most of the ionospheric anomalies are also deterministic and reproducible by numerical modeling (Occhipinti et al., 2006, 2008) via the ocean/neutral atmosphere/ionosphere coupling mechanism. This approach is used here to focus on the magnetic field dependence in the tsunamigenic IGW propagation in the ionosphere. The etherogenity produced in the ionosphere by a north-ward and south-ward tsunami propagation propagation in the global scale is presented here in term of TEC perturbations. [DasGupta et al., 2006] Earth Planet. Space, 35, 929-959. [Liu et al., 2006] J. Geophys. Res., 111, A05303. [Occhipinti et al., 2006] Geophys. Res. Lett., 33, L20104, 2006 [Occhipinti et al., 2008] Geophys. J. Int., 173, 3, 753-1135, 2008.
Lognonné Philippe
Occhipinti Giovani
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