4.7 Article

Modeling the ionospheric impact of tsunami-driven gravity waves with SAMI3: Conjugate effects

期刊

GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 14, 页码 5719-5726

出版社

AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL064871

关键词

tsunami; gravity waves; ionosphere; conjugate effects

资金

  1. ONR [N00014-15-0-1593, N00014-13-1-0350]
  2. NRL

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The Naval Research Laboratory first-principles ionosphere model SAMI3 is used to study the ionospheric effects associated with tsunami-driven gravity waves. Specifically, the Tohoku-Oki tsunami of 11 March 2011 is modeled. It is shown that gravity wave-induced variations in the neutral wind lead to plasma velocity variations both perpendicular and parallel to the geomagnetic field. Moreover, the electric field induced by the neutral wind perturbations can map to the conjugate hemisphere. Thus, electron density variations can be generated in both hemispheres which impact the total electron content (TEC) and 6300 angstrom airglow emission. It is found that the TEC exhibits variations of less than or similar to +/- 0.1 total electron content unit (1 TECU = 10(16) el m(-2)) and the 6300 angstrom airglow emission variation is up to similar to +/- 2.5% relative to the unperturbed background airglow.

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